Comparison between waste glass and gravel for workability and strength concrete grade

Abstract

A massive amount of glass waste is produced every year all over the world, but a small amount of this waste is being recycled. The recycling of waste glass (WG) in concrete shows great achievements in reducing the quantity of glass. According to researchers’ the addition of waste glass in concrete enhances the properties of concrete, WG can be used in any form like powder, fine or coarse aggregate. However, from previous studies of different researchers, it has been found that there are some ill effects of waste glass on concrete. This inconsistency of results of waste glass between researchers affects the acceptance (using) of waste glass in concrete structures. To overcome the formal problem the study clarifies the debate of using or not using the waste glass in concrete depending on the analysis of different papers. In this study, an attempt was made to experimentally evaluate the mechanical properties of concrete with recycled glasses. The control mix (plain concrete) was made and the other mix contained waste glasses as a replacement for coarse aggregates. According to the slump test, the slump value of the control mix was 70mm and the slump value of the other mix containing glasses was 95mm, both are medium even if that of concrete glass tends to gradually increase. The compressive strength too has decreased by39.9percentage.the maximum compressive strength of a control mix after 28 days of curing was 19.7 KN/m 2 while the other mix with waste glasses was 11.8 KN/m 2 . The incorporation of waste glasses can highly reduce compressive strength due to their lower bonding capacity in the mix.