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The application of brick–concrete recycled aggregates can alleviate the problem of increasing construction waste and increasing scarcity of natural aggregates. The different moisture condition of coarse aggregates can significantly affect the performance of brick–concrete recycled aggregate concrete. In this paper, the additional water quantity of...
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Context 1
... brick-concrete recycled coarse aggregate (RA) is continuously graded from 5 mm to 20 mm, in which the content of crushed concrete particles is 65%, the content of broken brick particles is 34%, and the impurities are about 1%. The natural coarse aggregate (NA) used for comparison concrete is 5~20 mm Tongchuan limestone gravel, and the properties of coarse aggregate are listed in Table 3. The water absorption rate of coarse aggregate was carried out according to Chinese National Standard GB/T 14685-2011. ...Similar publications
To date, the utilization of glass waste as an alternative aggregate in concrete has gained significantly increasing attention, owing to its remarkable properties. However, its high replacement content and glass particle size, of greater than 5 mm, causes an increase in the alkali-silica reaction expansion and a reduction in the concrete strength in...
Recent years have witnessed an increase in the quantity of waste glass (WG) across the globe. Replacing the fine aggregate with WG is one of the steps toward preserving the natural resources of the environment and creating low-cost concrete. The present study is concerned with replacing fine aggregates with glass powder (GP) at (0%, 15%, 30%, and 5...
Citations
... Developed and developing countries have significantly increased the proportion of construction and demolition waste, as is the case of the United States, which generates more than 500 million tons annually [1], and this is also supported by Cimentada et al. [2], stating that the annual generation of construction and demolition waste (CDW) is approximately 1 ton per inhabitant, where construction waste represents between 30 and 40% of the total urban waste, the annual amount of construction waste deposited has exceeded 400 million tons [3]. ...
The construction industry generates tons of waste annually worldwide, causing a significant impact on the environment. The massive accumulation of construction and demolition waste exacerbates this problem, particularly in countries like Peru where the construction industry is rapidly growing. This research proposes addressing this challenge by substituting natural aggregates in concrete production with recycled concrete aggregates (RCA), treated beforehand. The main objective is to assess the feasibility of using RCA in concrete as a partial substitute for coarse aggregate and to analyze the physical and mechanical properties of concrete incorporating RCA to address its use in the Peruvian context. Within the methodology employed, five types of samples with recycled concrete at proportions of 10%, 20%, 30%, and 40% by weight of coarse aggregate were prepared, and physical and mechanical properties were evaluated at 7, 14, and 28 days. The results showed that the optimal RCA content was 20%, where slump, unit weight, and air content decreased but remained within permissible ranges. Additionally, it was observed that mechanical properties remained stable without significant variations. The compressive strength did not exhibit values lower than 21 MPa compared to the reference concrete. Likewise, the modulus of elasticity, tensile strength, and flexural strength decreased, showing a consistent trend. Consequently, it can be concluded that recycled aggregates are viable as effective substitutes for natural aggregates in the production of sidewalks, slabs, pavements, etc., offering a sustainable and environmentally friendly alternative.
... The clay soil used for brick production should have a moisture content ranging from 4 to 15 wt%. 20 Based on Fig. 2, it is evident that CTW materials exhibit lower initial moisture levels. The figure displays that waste from the ceramic and tile industries has lower initial moisture content and lower baking shrinkage than clay, leading to higher-quality bricks. ...
BACKGROUND
Although there has been considerable research on the utilization of ceramic and tile waste (CTW) in concrete production, there has been a noticeable lack of studies examining its application in fired brick manufacturing and the use of ceramic glaze powder as an additive in cement. The aim of this study is to assess the potential of reusing CTW as concrete aggregate and as part of fired brick composition. Furthermore, this research investigates the potential application of glaze powder as a novel cement additive, which has not been previously explored.
RESULTS
The results indicate that bricks made from waste materials had a moisture absorption of 12.2% and flexural strengths ranging from 15.39 to 24.2 MPa. X‐ray diffraction analysis showed that quartz and kaolinite were the dominant crystalline phases in bricks made from raw glazed ceramic. The concentration of heavy metals in the toxicity characteristic leaching procedure leachate of the waste materials decreased after the firing process during the manufacturing of bricks due to oxidation, immobilization and encapsulation processes, with levels below standard limits. In concrete, the use of 20% ceramic glaze powder as a partial cement replacement resulted in a 55% increase in compressive strength. Additionally, the leaching of barium decreased by 70% and that of strontium decreased by 17%.
CONCLUSION
This study highlights the promising utilization of CTW in fired brick production and the effective incorporation of ceramic glaze powder as a cement additive. The findings suggest enhanced mechanical properties and decreased heavy metal leaching, indicating the viability of CTW reuse in sustainable construction practices. © 2023 Society of Chemical Industry (SCI).
... Comparison of the chloride permeability of rubberized concrete (R), glass concrete (G), and clay brick concrete (B)[23,110,[150][151][152][153][154][155]. ...
... (B) Wu et al. 2022, W/C=0.45, (B) Comparison of the chloride permeability of rubberized concrete (R), glass concrete (G), and clay brick concrete (B)[23,110,[150][151][152][153][154][155]. ...
Worldwide, vast amounts of waste are produced every year and most waste is sent directly to landfills or burnt, which has severe and harmful impacts on the environment. Recycling waste materials is considered the most visible solution to protect the environment. Using scraps in concrete production is a proper method for getting rid of wastes, improving the characteristics of concrete, reducing the consumption of natural aggregates, and can be used as cementitious materials that
decrease cement production so that the CO2 that is produced during cement manufacturing decreases. This review paper summarizes the use of recycled waste materials, including rubber tires, crushed glass, and crushed clay brick in concrete, as a fractional replacement of aggregates, cement, etc., to develop eco-friendly lightweight construction materials. It has been concluded that the dry density
of sustainable concrete decreased to 4, 21.7, and 31.7% when crushed glass, clay brick, and rubber tire were incorporated into the concrete instead of traditional aggregate, respectively. Waste rubber has good results in sulfate, thermal, and impact resistance, while glass powder and finely crushed clay brick helped to improve mechanical properties by increasing reach by 33% for glass and a
slight increase for crushed clay brick, as well as thermal resistance compared to normal concrete. Moreover, due to the low particle density of these waste materials compared to that of normal-weight aggregates, these materials can be utilized efficiently to produce lightweight concrete for structural and non-structural applications such as road engineering, flooring for mounting machinery, highway
and rail crash barriers, permeable pavement, interlocking bricks, insulation, filling concrete, and bearing walls.
