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Of late the industrial rejects are considered secondary resources for many fold applications involving recovery of mineral values, precursor for onward processing as well as raw material for product development. Waste utilization considers the strictures of material detoxification, process efficiency, overall economics, energy use, impact on enviro...
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To bring an challenging and acceptable change in construction industry, upcoming graduates have to be much aware of alternate materials to be used in conventional concrete with improved performances and this study can be an encouraging approach to them. Many research studies have investigated the possible use of industrial by-products such as fly a...
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... The powdered fractions of raw material were subjected for chemical, mineralogical and morphological analysis. Chemical characterization of the major elements present in raw material was determined by standard wet analysis procedures [18][19][20][21][22]. Depend on the origin, the raw materials reported different range of major constituents as shown in Table 1. ...
Abstract
This paper describes the process and scientific approach adopted to utilize overburden laterite of aluminum
industry as primary raw material for the development of energy efficient geopolymeric bricks. The
geopolymer bricks were developed at ambient temperature with a ternary blend of laterite along with
different reject materials of other industrial origin viz. fly ash, rice husk ash, blast furnace slag, different soil
from barren lands etc., having sodium hydroxide and sodium silicate as alkali activator. Compressive
strength, water absorption, efflorescence and bulk density for the developed blocks were assessed for
different considered mix design. The bricks developed using laterite, fly ash and rice husk ash blend showed
compressive strength as high as 23 MPa while fulfilling the other criteria of Indian standard 1077:1998.
These bricks also shown to have less density, water absorption and more compressive strength compared to
commercially available burnt clay and fly ash bricks. Based on the results obtained, synergistic use of over
burden laterite along with other industrial rejects is recommended for developing energy efficient building
blocks for its bulk utilization. The developed process confirmed zero regeneration of rejects and associated
environmental impacts
