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Glass Fibre Reinforced Concrete (GFRC)

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In the 1940’s, potential of glass as a construction material was realized and improvement continued with the addition of zirconium dioxide in 1960's for harsh alkali conditions. To enhance durability of materials, new generation of glass fibres directed to improvement process. In this way, glass fibre reinforced concrete (GFRC) was started to produce for the satisfaction of different demands. Scientific studies and tests on the GFRC have shown that the physical and mechanical properties of the GFRC change depending on the quality of the materials and the accuracy of the production methods. GFRC can be used wherever a light, strong, fire resistant, weather resistant, attractive, impermeable material is needed. As technology advances, it is possibly expected to build the whole building and complex freeform with low cost. In recent years, the effect of glass fibres in hybrid mixtures has been investigated for high-performance concrete (HPC), an emerging technology termed, which has become popular in the construction industry.
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ISSN:2148-3736
El-Cezerî Fen ve Mühendislik Dergisi
Cilt: 5, No: 1, 2018 (136-162)
El-Cezerî Journal of Science and
Engineering
Vol: 5, No: 1, 2018 (136-162)
ECJSE
How to cite this article
İskender, M., Karasu, B., “Glass Fibre Reinforced Concrete (GFRC)El-Cezerî Journal of Science and Engineering, 2018, 5(1); 136-162.
Bu makaleye atıf yapmak için
İskender, M., Karasu, B.,Cam Lif Takviyeli BetonEl-Cezerî Fen ve Mühendislik Dergisi 2018, 5(1); 136-162
Research Paper / Makale
Glass Fibre Reinforced Concrete (GFRC)
Muhammed İSKENDER, Bekir KARASU
Anadolu University, Engineering Faculty, Department of Materials Science and Engineering, 26555, Eskişehir
TÜRKİYE, bkarasu@anadolu.edu.tr
Received/Geliş: 27.12.2017 Revised/Düzeltme: 04.01.2018 Accepted/Kabul: 08.01.2018
Abstract: In the 1940’s, potential of glass as a construction material was realized and improvement continued
with the addition of zirconium dioxide in 1960's for harsh alkali conditions. To enhance durability of
materials, new generation of glass fibres directed to improvement process. In this way, glass fibre reinforced
concrete (GFRC) was started to produce for the satisfaction of different demands. Scientific studies and tests
on the GFRC have shown that the physical and mechanical properties of the GFRC change depending on the
quality of the materials and the accuracy of the production methods. GFRC can be used wherever a light,
strong, fire resistant, weather resistant, attractive, impermeable material is needed. As technology advances, it
is possibly expected to build the whole building and complex freeform with low cost. In recent years, the
effect of glass fibres in hybrid mixtures has been investigated for high-performance concrete (HPC), an
emerging technology termed, which has become popular in the construction industry.
Keywords: Glass, Fibre, Reinforcement, Concrete, Properties, Application, Development
Cam Lif Takviyeli Beton
Özet: 1940’lı yıllarda camın bir yapı malzemesi olarak sahip olduğu potansiyelinin farkına varılmış ve
1960’larda zirkonyum dioksit katkısıyla iyileştirmelere devam edilmiştir. Malzemelerin kimyasal dayanımını
arttırmak için yeni nesil cam lifleri, söz konusu iyileştirme sürecine dâhil edilmişlerdir. Böylece, arzu edilen
beklentileri karşılamak üzere cam takviyeli beton üretimi başlamıştır. Bu grup beton üzerine gerçekleştirilen
bilimsel araştırma ve testler cam lifle kuvvetlendirilmiş betonun fiziksel ve mekanik özelliklerinin kullanılan
malzemelerin kalitesine ve üretim yönteminin hassasiyetine bağlı olarak değiştiğini göstermiştir. Böylesi
betonlar, hafif, sağlam, ateşe ve hava koşullarına karşı dayanıklı, sızdırmaz malzeme ihtiyacı doğduğunda
kullanılabilirlik arz etmektedirler. Teknoloji ilerlerken bir binanın tamamının cam takviyeli betonlarla düşük
maliyetle yapımının mümkün olabileceği beklentisi de artmaktadır. Geçtiğimiz yıllarda cam elyafların hibrid
karışımlardaki etkisi yüksek performanslı beton elde etmek amacıyla araştırılmaya başlanmıştır. Bu yeni
teknoloji inşaat sektöründe popüler hale gelmiştir.
Anahtar kelimeler: Cam, Lif, Kuvvetlendirme, Beton, Özellikler, Uygulama, Gelişme
1. Introduction
Glass fibre reinforced concrete (GFRC) is a material that is making a significant contribution to the
economics, technology and aesthetics of the construction industry worldwide for over 40 years.
GFRC is one of the most versatile building materials available to architects and engineers [12].
Compared to traditional concrete, it has complex properties because of its special structure.
Different parameters such as watercement ratio, porosity, composite density, inter filler content,
fibre content, orientation and length, type of cure influence properties and behaviour of GFRC as
well as accuracy of production method [24]. GFRC can be produced as thin as 6 mm so their
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weight is much less than traditional precast concrete products. Progressing of 3Dprinting
technology with glass fibre reinforced ink can build a whole building and complex architecture
forms with high reliability as well as the use of premix, sprayup, hybrid methods of GFRC. Self
cleaning environmentally friendly panels for industrial construction have been contributing to the
GFRC both in terms of cost and popularity. The use of glass fibre in the High Performance
Concrete (HPC) class, being a class with extremely high mechanical performance, durability,
workability and aesthetics, has gained momentum in recent years. The design and manufacture of
GFRC products is covered by international standards, which have been developed in Europe,
America, Asia and Australasia. GFRC is manufactured in over 100 countries [56].
2. Brief History of GFRC
Potential of glass as a construction material was realized in the 1940’s. But, since the glass has very
low alkali resistance to corrosion and loss of tensile strength of the glass fibres it became very
difficult to be mixed with concrete which is alkaline in nature. Thus, a better glass being alkali
resistant was made with the content of high level of zirconium dioxide in the mid1960s. From this
time such fibres became commercially available and new fibres and their applications were covered
by patents [67]. In early 1980s, as evolved new generation of fibres composites throughout the
matrix provided substantially increased tensile, flexural and impact strength. EN standards were
developed, the quality control was increased for the best practice in production and designs
supported by the International Glass Fibre Concrete Association. In the early years of new
millennium rapid increase in GFRC production with the construction burst worldwide. Its growth
slowed down due to the global economic crisis at one point, but the use of GFRC by major
architects of the world was widespread in different areas [78].
3. Production of GFRC
3.1 Production Methods
There are two main production techniques of GFRC, usually preferred as sprayup and premix. In
the sprayup process, the mortar is produced separately from the fibres, which are mixed only at the
jet of the spray gun. The glass fibre strands are cut within the spray gun to the required size, usually
being between 25 mm and 40 mm and are about 45 % of the total mixture weight. Using matrix
without fibres, a thin coat is created as thin as possible by spraying. Next layers of matrix with
fibres are quickly applied to ensure integrity. After the bulk of the GFRC is builtup on it in layers
the mixture is provided to toughen. Covering layer is usually 35 mm thick, depending on the type
of surface treatment. Each pass of the spray gun deposits a layer approximately 46 mm in
thickness, however, has to be carefully an adequate thickness in corners and complex shapes.
Finally, the structure compacted with a cylindrical roller or a float so as to the impregnation of the
fibres within the mortar and the removal of the air retained within the mixture. Using a depth gauge
or a template, thickness of layer is checked in the specification for GFRC being the minimum
(Figure 1) [910].
In the GFRC production method by premixture and casting, cement matrix is firstly produced and
precut glass fibers, between 24 % (usually 3.5 %) weight, are then mixed. The length of the pre
cut fiber is usually 612 mm, however, longer fibers lead to restrict to the mixture workability.
Respectively, the matrix is produced in a highshear mixer and chopped fiber strands are
incorporated in a lowspeed mixing regime because of maximum workability. This facilitates their
dispersion at the highest practical volume content with a minimum damage to the fibers. Production
with premix GFRC may involve several procedures such as injection and vibration, pressing, or
shotcreting (Figure 1) [1112].
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Figure 2. Sprayup application [10].
Figure 3. Premixture and casting process [12].
Besides these two main production techniques there is also other production method: hybrid
process. In alternative hybrid method uses hopper gun to spray the face coat. The fibre loaded
backer mixture is often poured or hand packed, just like ordinary concrete. Once the thin face
mixture is sprayed into the forms it is allowed to stiffen up before the backer mixture is applied so
that prevents the backer mixture from being pushed through the thin face mixture. The face and
backer mixtures are applied at different times because of the consistency can be different. It is
always important to ensure the gross makeup similarly water/cement ratios and polymer contents
should be the same to prevent curling. However, the heavy dose of fibres in the backer mixture
often precludes spraying, so traditional methods is required (Figure 3) [11].
Figure 4. Spraying the face coatface coat ready for backer mixhand packing backer on upright
[11].
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3.2 Curing
Curing stage isn’t essentially different from that in normal concrete technology. Moreover, the
GFRC product is much more sensitive to the deleterious effects of improper water curing. Higher
surface area and the low thickness of the GFRC can lead to increased drying and reductions in its
strength. Because of the polymer content, long term moist curing is often unnecessary. Small
amounts of acrylic polymers in the fresh mixture keep the internal moisture in and prevent its loss
by evaporation. Sudden and rapid dryingout or large temperature changes must be avoided to
ensure that the GFRC reaches adequate strength for the element to be safely removed from a mould.
Generally, GFRC pieces are stripped the next day, mostly 16 and 24 hours after casting. Longer
curing will always yield better concrete, but the general tendency is strip soon after casting [11, 13].
4. Structural Properties of GFRC
The properties of fibre reinforced cementitious materials are dependent on the structure of the
composite. Therefore, in order to analyse these composites, and to predict their performance in
various loading conditions, their internal structure must be characterized. The three components that
must be considered are:
1. The structure of the bulk cementitious matrix,
2. The shape and distribution of the fibres,
3. The structure of the fibrematrix interface [13].
4.1 Matrix
The bulk cementitious matrix can be divided into two types depending on the particulate filler
(aggregate) which it contains: paste/mortar (cement/sandwater mix) and concrete (cementsand
coarse aggregatewater mix). Glass fibre reinforced concrete pastes or mortars are usually applied
in thin sheet which are employed mainly for cladding. In these applications the fibres act as the
primary reinforcement and their content is usually in the range of 515 % by volume. Special
production methods need to be applied for manufacturing such composites.
4.2 Fibers
There are generally two distinctly different types of fibrereinforcing arrays: continuous
reinforcement in the form of long fibres which are incorporated in the matrix by techniques such as
filament winding or by the layup of layers of fibre mats; and discrete short fibres, usually less than
20 mm long, which are incorporated in the matrix by methods such as spraying and mixing. The
reinforcing array can be further classified according to the dispersion of the fibres in the matrix, as
random 2D or 3D.
The first is random, threedimensional (3D) reinforcing. This occurs when fibres are mixed into the
concrete and the concrete is poured into forms. Because of the random and 3D orientation, very few
of the fibres actually are able to resist tensile loads that develop in a specific direction. This level of
fibre reinforcing is very inefficient, requiring very high loads of fibres. Typically, only about 15 %
of the fibres are oriented correctly.
The second level is random, twodimensional (2D) reinforcing. This is what is in sprayup GFRC.
The fibres are oriented randomly within a thin plane. As the fibres are sprayed into the forms, they
lay flat, confirming to the shape of the form. Typically, 30 to 50 % of the fibres are optimally
oriented [1314].
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4.3 The Structure of the FibreMatrix Interface
Cementitious composites are characterized by an interfacial transition zone in the vicinity of the
reinforcing inclusion, in which the microstructure of the paste matrix is considerably different from
that of the bulk paste, away from the interface. The nature and size of this transition zone depends
on the type of fibre and the production technology; in some instances, it can change considerably
with time. When considering the development of the microstructure in the transition zone, a
bundled filament should be made and with bundled filaments only the external filaments tend to
have direct access to the matrix [1415].
5. Properties of GFRC
Different parameters such as watercement ratio, porosity, composite density, inter filler content,
fibre content, orientation and length, and type of cure influence properties and behaviour of GFRC.
GFRC derives its strength from an optimal dosage of fibres and acrylic polymer. The polymer and
concrete matrix serves to bind the fibres together and transfer loads from one fibre to another via
shear stresses through the matrix. Density and porosity are effective on the degree of compaction
[1617].
In concrete structure, efficiency of fibres depends upon their orientation. When the fibres are
aligned perpendicular to the crack openings in the direction of stress, the positive effect of fibres on
the performance of GFRC is increased [1819]. Along with that because of requiring the
improvement in the longterm performance of GFRC the type of glass fibres such as E and alkali
resistant (AR) glass fibres must also be considered as well as the environmental conditions. When
alkali attack considered main deterioration mechanism in E glass, there should be made an attention
to seal the fibres completely from the matrix or used a very low alkali cementitious material. On the
other hand, so as to improve the alkaline resistance and durability of GFRC with AR glass fibres,
the main effort should be directed modifying the microstructure of the matrix in the vicinity of the
glass filaments. This could be provided with controlling of the hydration process in its vicinity or
changing the composition of the matrix.
The rate of ageing is a function of the type of glass fibre. New generation of ARglass fibres are
better than E glass ones. The ageing performance of the composite is also sensitive to the
weathering conditions. As the aging continues in different environments, chemical attack may
become significant so there is need to develop special glass fibres for better alkali resistance [20].
According to the importance of this parameters and condition affecting the features of GFRC, a
review is made to demonstrate their effects on mechanical and physical properties of concrete.
Some decorative materials which exhibit physical and mechanical properties of GFRC materials
shown in Figures 45.
Figure 0. Precast GFRC table top with fire [21].
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Figure 5. Design for bendable concrete (lattice pieces) [22].
5.1 Mechanical Properties of GFRC
5.1.1 Compressive Strength
The compressive strength of concrete has been increased with the addition of fibres to concrete
mixes, however further addition of fibre indicated a gradual decrease in strength aspects [2324].
5.1.2 Modulus of Elasticity
In heterogeneous and multiphase materials such as concrete, the density and the characteristics of
the transition zone determine the elastic modulus behaviour of the composite. The experimental test
results exhibit that the use of fibres has no important influence on the modulus of elasticity of
concrete. It was reported that mostly a little reduction in the modulus of elasticity of the concrete at
a low glass fibre content [2526].
5.1.3 StressStrain Curve
Stress-strain behaviour is affected from different parameters such as the effect of fibre lengths,
aggregate type and effect of loading rate. As it is given in Figure 6, GFRC has a significant impact
on the ascending portion of the stressstrain curve and additionally, descending part of the stress
strain curve is an essential key element under compression loads [2728].
Figure 6. StressStrain diagram with differences at fibre ratios [28].
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5.1.4 Flexural Strength
Glass fibres have an effect on the increase in the flexural strength of concrete. Figure 7 presents that
an increase in the fibre content (but not much increase) resulted in an increase in the flexural
strength of concrete, compared to plain concrete specimen. The fibres resist the propagation of
cracks and tend to reduce the sudden failure of structure of concrete and so they lead to an increase
in the load carrying capacity of concrete [2931].
Figure 7. Variation of flexural strength with the age of concrete [31].
6. Physical Properties of GFRC
6.1 Drying shrinkage
Drying shrinkage has a significant effect on the structural and durability performance of the
concrete. The mechanism of shrinkage of cementitious material is complex, but total shrinkage is
principally affected by the aggregate proportion and type, and water/cement ratio, having influence
on drying and causing many micro cracks propagation simultaneously. Shrinkage in concrete
structures may also trigger forms of damage in concrete like as corrosion, freeze damage in this
manner, seriously, shorten the service life of concretes [3233]. Alkaliresistant glass fibres are
effective in controlling restrained shrinkage cracking of concrete and they promote multiple
cracking and reduce crack widths. Figures 8 and 9 indicate that an increase in the fibre content
resulted in a significant reduction in the shrinkage strain of concrete, particularly from 25 to 75
days, compared to plain concrete specimen.
Figure 8. Plain (left) GFRC (right) restrained shrinkage specimens [34].
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Figure 9. Restrained shrinkage test results for GFRC with different glass fibre contents [34].
6.2 Creep
Because of its poor strain capacity and low tensile strength, concrete is a brittle material and highly
susceptible to cracking. These cracks can decrease the lifetime of a structure by allowing aggressive
agents. Therefore, the evolution of crack openings through time is important for the durability of
concrete [36]. In terms of creep and shrinkage, application technique of GFRC must be taken into
account. With pneumatic spraying, glass fibre added into mortar mixture at the time of pouring and
there is a significant modification of the compositions embodied in binder consumption. This can
effect creep strain [37].
6.3 Porosity, Chloride Penetration Resistance and Electrical Resistivity
Concrete is a multiplephased material, and it has lots of micro pores which can be transferred
thanks to the migrating ions. Therefore, resistivity measurement is a determinative way to explore
the microstructure of concrete [38]. Resistivity of concrete is influenced by many factors such as
watercement ratio, concrete composition, admixtures, curing condition, humidity. As a result, all
of these impacts can trigger to increase the risk of steel rebar corrosion in the concrete [39]. This
effect can be clearly seen in Figures 1011. Along with this, chloride presence in the concrete
structure can increase electrical current and the risk of corrosion [40]. Alkali resistance GFRC
depicts less permeability of chloride into concrete increasing corrosion resistance. Figure 12
indicates that an increase in the fibre content resulted in a significant reduction in the chloride
permeability of concrete, compared to plain concrete specimen. Thus, durability which is one of the
most important aspects of the concrete, can be improved during working conditions of concrete
structures [41].
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Figure 10. Chloride attack [42].
Figure 11. Cracking and spalling of the concrete cover [43].
Figure 12. Rapid chloride permeability test (RCPT) (with different glass fibre) for different ages of
concrete [41].
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The electrical resistivity of concrete is observed to decrease with the increase in watercement ratio.
Besides, because of increasing porosity in concrete by the addition of fibers the resistivity values of
fiber concretes are found lower than control concrete one [44].
Fibers can play strong positive result by holding the matrix together even if it is completely
dehydrated process which triggered possibility of explosion. Addition of polymer materials to
GFRC will affect the fire performance properties [16].
7. Applications and Latest Developments of GFRC
Compared to traditional concrete, GFRC has complex properties because of its special structure.
As a result of the structural properties, it has suitable moulding, strong and durable structure.
Moreover, because of being fast to install and easy to handle and transport, it provides low cost. It
disperses or absorbs sound and it is environmentally friendly.
As total output of these properties, one of the key features of GFRC has been its versatility in use.
GFRC is widely and reliably used in architecture (i.e. cladding, mouldings, landscaping), building
(i.e. roofing, walls and windows, renovation, foundations and floors), engineering (i.e. permanent
formwork, utilities, acoustics, bridges and tunnels, roads, water and drainage).
Figure 13. GFRC pipeline trench application
(Courtesy of Nippon Electric Glass America
Inc.) [45].
Figure 14. GFRC railroad track slabs for high
speed trains (Courtesy of Beaker Corp. USA)
[45].
Figure 15. GFRC panels used for heat insulation (Turkish Football Federation) [46]
The use of premix, sprayup, hybrid methods of GFRC is becoming increasingly widespread and
some amazing projects have been completed [4749].
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Figure 10. One of the earliest applications of GFRC produced by sprayup process (completed in
1974) [9].
Figure 17. A total of 110 000 m2 of GFRC was used (Nanjing Youth Olympic Centre, China,
completed in 2014) [9].
Complex freeform architecture is one of the most striking trends in contemporary architecture.
Today, design and fabrication of such structures are based on digital technologies, which have been
developed in other industries (automotive, naval, aerospace industry) [50]. 3Dprinted building is a
result of highefficiency, environmentallyfriendly and costeffective building technology. With
the progressing of 3D printing technology a whole building can be built with high reliability, which
will doubtlessly make a change to the traditional construction industry. The building is printed
using a huge printer which is programed for special dimensions and specially made highstrength
glass fibre reinforced printing ink [51].
Figure 18. 3D TechnologyFoster + Partners made from GFRGGFRC and acrylic [50].
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Because of mass colouring of GFRC is a demanding job, this situation calls for special choice of
cement, granulates, fine minerals and pigments, so making it rather costly. Coloured impregnation
products are alternative to the mass colouring of architectonic concrete. They provide the graduated
decoration of concrete walls and can also ensure water repellence or stain can lead to repellent
protection [52].
Figure 19. Colouring solution for GFRC [52].
In Türkiye, self–cleaning environmentally friendly panels for an industrial building for the first time
in the world were developed with a unique glass fibre reinforced concrete solution. Because of the
building is in the middle of a refinery (Tüpraş), selfcleaning GFRC panels are to be exposed
harshest environment such as NOx and SOx emissions [53].
Figure 20. Façade of Tüpraş RUB [53].
High Performance Concrete (HPC) is a class of concrete characterized by extremely high
mechanical performance, durability, workability and aesthetics. Due to these features some project
references have increased since few years. Glass and hybrid of various fibres can be employed for
selfcompacting formulations [5455].
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Karasu et al. studied the use of glass in concrete reinforcement [56], the suitability for using glass
and fly ash in Portland cement concrete [57], chemical durability behaviour of bulk glasses in the
SrOMn2O3Fe2O3MgOZrO2SiO2 (SMFMZS) system [5859], the effects of filler glasses on
mechanical properties of concrete [60], chemical dissolution mechanism of the SrOMgOZrO2
SiO2 (SMZS) system glasses [61], the effect of transition metal oxide additions on the chemical
durability of SrOMgOZrO2SiO2 glasses [62], SrOMn2O3Fe2O3MgOZrO2SiO2 (SMFMZS)
system glasses in Portland cement concrete [63], investigations on the alkali durability of the
SMFMZS (SrOMn2O3Fe2O3MgOZrO2SiO2) system glass fibres [64], characterization of
commercially available alkali resistant glass fibre for concrete reinforcement and chemical
durability comparison with SrOMn2O3Fe2O3MgOZrO2SiO2 (SMFMZS) system glasses [65],
electron microscopy observations on the microstructural evolution of glass fibre reinforced concrete
(GFRC) materials [6667], the use of the SMFMZS (SrOMn2O3Fe2O3MgOZrO2SiO2) system
glass fibres in concrete reinforcement [68], novel glass compositions for concrete reinforcement
[69], investigation on fibre production attempts from the borosilicate and SMFMZS (SrOMgO
Fe2O3Mn2O3ZrO2SiO2) glass system [70], mechanical propertiesmicrostructure relationship in
high alkali resistant SMZS (SrOMgOZrO2SiO2) system glass fibre reinforced concrete [71], the
effect of waste glass addition to SrOMn2O3Fe2O3MgOZrO2SiO2 (SMFMZS) glasses [72],
novel glass compositions for fibre drawing [73], some chemical and mechanical properties of
SMZS (SrOMgOZrO2SiO2) and SMFMZS (SrOMn2O3Fe2O3MgOZrO2SiO2) system glass
fibres reinforced concrete (GFRC) materials [74], mechanical properties of SMFMZS (SrO
Mn2O3Fe2O3MgOZrO2SiO2) system glass fibre reinforced concrete (GFRC) materials [75],
investigations on reinforcing concrete (GFRC) materials with SMFMZS (SrOMn2O3Fe2O3
MgOZrO2SiO2) system glass fibres [76], the usage of high alkali resistance SrOMn2O3Fe2O3
MgOZrO2SiO2 (SMFMZS) system glass fibres in cement structure and their characterization
[77].
Reis and Ferreira reported the assessment of fracture properties of epoxy polymer concrete
reinforced with short carbon and glass fibre [78] and freezethaw and thermal degredation influence
on the fracture properties of carbon and glass fibre reinforced polymer concrete [79].
Purnell and Beddows reported that durability and simulated ageing of new matrix glass fibre
reinforced concrete [80]. Avci et al. made a search on mixedmode fracture behaviour of glass fibre
reinforced polymer concrete [81]. Abbasi and Hogg examined the temperature and environmental
effect on glass fibre rebar: modulus strenght and interfacial bond strenght with concrete [82] and a
model for predicting the properties of the constituents of a glass fibre rebar reinforced concrete
beam at elevated temperature simulating a fire test [83].
ElRagaby et al. seached for fatigue analysis of concrete bridge desk slabs reinforced with E
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reinforced concrete panels reinforced with externally bonded GFRP laminates [85].
Lee et al. conducted a research on interfacial bond strenght of glass fibre reinforced polymer bars in
highstrenght concrete [86]. Tang et al. worked on bond performance of polystyrene aggregate
concrete (PAC) reinforced with glass fibrereinforced polymer (GFRP) bars [87].
Asokan et al. studied assessing the recycling potential of glass fibre reinforced plastic waste in
concrete and cement composites [88]. Scheffler et al. reported the interphase modification of alkali
resistant glass fibres and carbon fibres for textile reinforced concrete I: fibre properties and
durability [89] and II: water absorption and composite interphases [90]. Hao et al. conducted a
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seach on bond strenght of glass fiber reinforced polymer ribbed rebars in normal strenght concrete
[91].
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waste powder filled concrete [92]. Abtahi et al. made a general review on fibrereinforced asphalt
concrete [93].
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polymer reinforcement to concrete [94]. Issa et al. conducted a research on the influence of fibres
on fluxural behavior and ductility of concrete beams reinforced with GFRP rebars [95]. Tysmans, et
al. established form finding methodology for forcedmodelled anticlastic shells in glass fibre textile
reinforced cement composites [96]. Enfedaque et al. worked on the failure and impact behavior of
facede panels made of glass fibre reinforced cement (GRC) [97].
Borhan investigated the properties of glass concrete reinforced with short basalt fibre [98]. Choi et
al. studied bond strenght of glass fibrereinforced polymer bars in unconfined concrete [99].
Barhum and Mechtcherine reported the effect of short, dispersed glass and carbon fibres on the
behaviour of textilereinforced concrete under tensile loading [100]. Emiroğlu et al. made ANFIS
and statistical based approach to prediction the peak pressure load of concrete pipes including glass
fiber [101]. Zheng et al. have made an investigation of structural behaviours of laterally restrained
GFRP reinforced concrete slabs [102]. Limbachiya et al. examined performance of granulated foam
glass concrete [103]. Nunes and Reiss carried out a research on the estimation of cracktipopening
displacement and crack extention of glass fiber reinforced polymer mortars using digital image
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[111].
Tassew and Lubell reported the mechanical properties of glass fibre reinforced ceramic concrete
[112]. Bathia et al. have given valuable results of sustainable fiber reinforced concrete for repair
applications [113]. Pastor et al. searched for glass reinforced concrete panels containing recylcled
tyres: evaluation of the acustic properties for their use as sound barriers [114]. Criado et al. carried
out a work on the effect of recycled glass fiber on the corrosion behavior of reinforced mortar [115].
Bhoopathi et al. examined the fabrication and property evaluation of bananahempglass fiber
reinforced composites [116]. Wang et al. have given their experimental results on the flexural
properties of epoxy syntactic foams reinforced by fiberglass mesh and/or short glass fiber [117].
Nigro et al. presented guidelines for flexural resistance of FRP reinforced concrete slabs and beams
in fire [118]. García et al. worked on mechanical recycling of GFRP waste as short–fiber
reinforcement in microconcrete [119].
Henriksen et al. made an innovative approach to manufacture thinwalled glass fibre reinforced
concrete for tomorrow’s architectural buildings envelopes with complex geometries [120]. Maranan
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et al. evaluated the fluxural strenght and serviceabality of geopolymer concrete beams reinforced
with glassfibrereinforced polymer (GFRP) bars [121]. Pehlivanlı et al. studied the mechanical
and microstructural features of autoclaved eareted concrete reinforced with autoclaved
polypropylene, carbon, basalt and glass fiber [122]. Ge et al. conducted a research on glass fiber
reinforced asphalt membrane for interlayer bonding between asphalt overlay and concrete pavement
[123]. Jarek and Kubik made an examination on the glass fiber reinforced polymer composite rods
in terms of the application for concrete reinforcement [124]. Schmitt et al. searched for thermo
mechanical loading of GFRP reinforced thin concrete panels [125]. Miotto and Dias discussed the
structural efficiency of fullscale timberconcrete composite beams strenghtened with fiberglass
reinforced polymer [126]. Kushartomoa et al. examined the mechanical behavior of reactive powder
concrete with glass powder substitute [127]. GarciaEspinel et al. made a publication on the effects
of sea water environment on glass fiber reinforced plastic materials used for marine civil
engineering constructions [128]. Ferreira et al. searched for shear strain influence in the service
response of FRP reinforced concrete beams [129]. Pagliolico et al. made a preliminary study on
light transmittance properties of translucent concrete panels with coarse waste glass inclusions
[130]. Neagoe et al. made an experimental study of GFRPconcrete hybrid bems with low degree of
shear connection [131]. Das et al. gave a report on the flexural fracture response of a novel iron
carbonate matrixglass fibre composite and its comparison to Portland cementbased composites
[132]. Kizilkanat et al. conducted an experimental study on the mechanical properties and fracture
behavior of basalt and glass fibre reinforced concrete [133].
Mastali et al. finished a study on the impact resistance and mechanical properties of reinforced self
compacting concrete with recycled glass fibre reinforced polymers [134]. Henriksen et al. showed a
new method to advance complex geometry thinwalled glass fibre reinforced concrete element
[135]. Man et al. exhibited the expansion behavior of selfstressing concrete confined by glass
fiber composite meshes [136]. Khan and Ali used the glass and nylon fibers in concrete for
controlling early age micro cracking in bridge decks [137]. Arslan investigated the effects of basalt
and glass chopped fibers addition on fracture energy and mechanical propertiers of ordinary
concrete [138]. Zhao et al. searched for the effect of fiber types on creep behavior of concrete [139].
Rudnov et al. wrote a paper on the properties and design characteristics of the fiber concrete [140].
Wroblewski et al. outlined the durability of bond between concrete beams and FRP composites
made of flax and glass fibers [141]. Vaitkevičius et al. studied advanced mechanical properties and
frost damage resistance of ultrahigh performance fibre reinforced concrete [142]. Aliabdo et al.
tried to utilize the waste glass powder in the production of cement and concrete [143]. ElNemr et
al. carried out a research on bonddependent coefficient of glass and carbonFRP bars in normal
and highstrenght concretes [144]. Bouziadi et al. published a paper on the effects of fibres on the
shrinkage of highstrenght concrete under various curing temperatures [145]. Yan and Lin
examined bond behavior of GFRP barconcrete interface and gave damage evolution assesment and
FE simulation implementations [146]. Gao et al. have given knowledge about the behavior of glass
and carbon FRP tube encased recycled aggregate concrete with recycled clay brick aggregate [147].
Ateş searched for mechanical properties of sandy soils reinforced with cement and randomly
distributed glass fibers (GRC) [148]. Yan et al. made a review on bond mechanism and bond
strenght of GFRP bars to concrete [149]. Huo et al. made an experimental study on dynamic
behavior GFRPtoconcrete interface [150]. Fursa et al. used the electric response to mechanical
impact for evaluating the durability of the GFRPconcrete bond during the frezethaw process
[151]. Wu et al. searched for improved bond behavior between GFRP rebar and concrete using
calcium sulfoaluminate [152]. Nobili published a paper on the durability assessment of impregnated
glass fabric reinforced cementitious matrix (GFRCM) composites in the alkaline and saline
environment [153]. Yan and Lin established a new strategy for anchorage reliability assessment of
GFRP bars to concrete using hybrid atrificial neural network with genetic algorithm [154].
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Dehghan et al. studied recycled glass fibre reinforced polymer additions to Portland cement
concrete [155]. Alberti et al. carried out a work on fibre reinforced concrete with a combination of
polyolefin and steelhooked fibre [156]. Amin et al. made materials characterisation of macro
synthetic fibre reinforced concrete [157]. Dal Lago et al. conducted fullscale testing and numerical
analysis of a precast fibre reinforced selfcompacting concrete slab prestressed with basalt fibre
reinforced polymer bars [158]. Hamad aimed to find the size and shape effect of specimen on the
compressive strenght of HPLWFC reinforced with glass fibres [159].
Ahmad et al. reported an experimental study on the properties of normal concrete, selfcompacting
concrete and glass fibrereinforced selfcompacting concrete [160]. Panda et al. examined
anisotropic mechanical performance of 3D printed fibre reinforced sustainable conctruction material
[161]. Kodur and Bhatt made an numerical approach for modeling response of fibre reinforced
polymer strenghtened concrete slabs exposed to fire [162]. Lee et al. examined the flexural capacity
of fibre reinforced concrete with a consideration of concrete strength and fiber content [163].
Sivakumar et al. conducted an experimental study on combined effects of glass fibre and
metakaolin on the rheological, mechanical and durability properties of selfcompacting concrete
[164]. Sathanandam et al. searched for low carbon building: experimental insight on the use of fly
ash and glass fibre for making geopolymer concrete [165]. Fathi et al. published a paper on the
simultaneous effect of fiber and glass on the mechanical properties of selfcompacting concrete
[166]. Zia and Ali studied the behavior of fibre reinforced concrete for controlling the rate of
cracking in canallining [167]. Xiaochun et al. concentrated themselves on the corrosion
mechanism and and performance analysis for the applicability of alkalineresistant glass fibre in
cement mortar of road pavement [168]. Mohajerani et al. made a review on practical recycling
applications of crushed waste glass in conctruction materials [169]. Enfedaque et al. have given
numerical simulation of the fracture behaviour of glass fiber reinforced cement [170]. Barris et al.
carried out an experimental study on crack width and crack spacing glassFRP reinforced concrete
beams [171]. Pakravan et al. published a review paper on hybrid short fibre reinforcement system in
concrete [172]. Yan et al. reported an experimental study on bond durability of glass fiber
reinforced polymer bars in concrete exposed to harsh environmental agents: frezethaw cycles
alkalinesaline solution [173]. Leone et al. investigated tensile properties and bond performance on
masonry substrate for glass fabric reinforced cementitious matrix [174]. Gemi et al. made an
experimental study on compressive behavior and failure analysis of composite concrete confined by
glass/epoxy ± 55° filament wound pipes [175]. Valvona et al. examined effective seismic
strenghtening and monitoring of a masonry vault by using glass fibre reinforced cementitious
matrix with embedded fiber Bragg grating sensors [176]. Krayushkina et al. made an investigation
of fiber concrete for road and bridge building [177]. Benmokrane et al. have given a laboratory
assessment and durability performance of vnylester, polyester, and epoxy glassFRP bars for
concrete structures [178]. Hambach and Volkmer reported the properties of 3Dprinted fiber
reinforced Portland cement paste [179]. Riad et al. have indicated the effect of discrete glass fibers
on the behavior of R.C. beams exposed to fire [180]. Youssef and Hadi dealed with axial load
bending moment diagrams of GFRP reinforced columns and GFRP encased square columns [181].
Bazli et al. conducted experiments and studied probabilistic models of bond strenght between GFRP
bar and different types of concrete under aggressive environments [182].
Garciá et al. searched for the fabrication, optimization and durability evaluation of self cleaning and
depolluting glass reinforced concrete panels [183]. Guo et al. studied on reduced alkalisilica
reaction damage in recycled glass mortar samples with supplementary cementitious materials [184].
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8. Conclusions
GFRC is one of the most versatile building materials available to architects and engineers. It has
contributed significantly to the economics, technology and aesthetics of the construction industry.
In line with this importance, a comprehensive review that was investigated widespread methods of
production of GFRC and compatibility of developing technology was hereby aimed in
understanding on the mechanical and physical properties of GFRC.
In general, the addition of glass fibre results in a higher compressive strength, but excessive amount
of fibre causes a reduction in the strength due to reduced workability. There is no significant
improvement in the modulus of elasticity of the concrete with the addition of fibres a low volume
fraction. Glass fibres have positive effect on stressstrain curve of GFRC and flexural strength,
because of the increase in the aspect ratio of fibres resulting in an increase pull-out and energy
absorption of the GFRC.
Generally, GFRC’s service life is higher than traditional concrete due to controlling of micro cracks
propagation, corrosion (especially ARglass fibre) and less permeability. GFRC is lightweight and
is about 5070 % lighter than traditional concrete. However, it is difficult to selfmix (requirement
of special material). Its cost is higher than that of traditional concrete due to the fiberglass, addition
of additives and acrylic copolymer, but developing technology can substantially change this
comparison.
GFRC is widely and reliably used in architecture, building, engineering applications. Moreover,
complex forms, decorative materials and a whole building can be produced with the aid of digital
technologies. GFRC is also a very important resource which includes selfcleaning environmental
friendly panels, easily dyeable surfaces, and high performance concrete applications.
Consequently, there is lots of GFRC applications in practice, but with very little research to support
it. In response to this expanding use requirement in practice, advanced GFRC research can be
performed so as to improve its properties further.
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... The achievement of improved splitting tensile strength and flexural strength in concrete relies on the appropriate proportion and effective dispersion of fibers within the mixture [27,28]. Glass fiber (GF) can also be employed as a reinforcement material in fiber-reinforced concrete [29,30]. Research indicated that the optimal splitting tensile strength and flexural strength were obtained with a 0.9% GF content. ...
Article
This study aimed to investigate the effects of cellulose fiber (CF) as a natural waste, glass fiber (GF), and polypropylene fiber (PPF) on the mechanical properties and microstructure of high-strength concrete (HSC). The analysis of the results focused on two main parameters: fiber type and fiber proportion. The study revealed that the proportion of the greatest improvement in compressive strength was 0.5% for GF, CF, and PPF, resulting in increases of 14.46%, 4.62%, and 3.43%, respectively. In terms of the splitting tensile strength, the proportion resulting in the greatest improvement was 1% for GF, while 0.5% for CF and PPF led to increases of 26.92%, 15.38%, and 11.54%, respectively. The proportion with the greatest improvement in flexural strength was 1% for GF and CF, showing increases of 29.41% and 9.8%, respectively. Additionally, a proportion of 0.5% PPF resulted in an 11.76% increase in flexural strength. For the density proportions of GF, CF, and PPF at 1%, the density was greater than 0.5%, leading to an inverse relationship with water absorption as density increased and water absorption decreased. SEM examination of the microstructure clearly revealed strong bonding between the GF and the cement matrix, while the CF displayed bonding and hydration products on its surface. PPF was observed to be cemented within the matrix, with microcracks identified in certain areas. These findings suggest that when utilized in appropriate proportions, all three types of fibers can serve as effective reinforcing materials, enhancing and refining the mechanical properties of HSC.
... Production with pre-mix GFRC may involve several procedures such as injection and vibration, pressing, or shotcreting [7]. Also, researchers have conducted studies [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22] about GRC which also contributed to this study. ...
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... Researchers have conducted studies [11], [12], [13], [14], [15], [16], [17] about masonry dome which also contributed to this study. Also, researchers have conducted studies [18], [19], [20], [21], [22], [23] about GRC and GRC retrofitting which also contributed to this study. ...
... Researchers have conducted studies [11], [12], [13], [14], [15], [16], [17] about masonry dome which also contributed to this study. Also, researchers have conducted studies [18], [19], [20], [21], [22], [23] about GRC and GRC retrofitting which also contributed to this study. ...
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