Influence of glass powder on environmental, thermal and mechanical performance of concrete containing rice husk ash

A large amount of waste glass (WG) and rice husk ash (CCA) is produced yearly. This paper evaluated the effect of incorporating waste glass in concrete prepared with rice husk ash (RHA) as a partial substitute for cement, considering differences in the mechanical and thermal behavior of concrete based on the proportions of WG and CCA. A 5% replacement of cement by ashes of rice husk and waste glass was considered in this work. Concrete samples were prepared with several RHA:WG ratios namely 1:0, 1:1, 1:2, and 1:3 (RHA + WG = 5%). For these concrete samples, the mechanical, thermal, and environmental properties were evaluated, the latter measured in CO2 emissions. Results showed that workability (i.e. slump) and density increased as long as WG content increased. The value of compressive strength of 1:3 mixture was 14% higher than the 1:0 concrete mixture. Moreover, the thermal conductivity was increased by 380% and CO2 emissions were dropped by 5.5%, in comparison to 1:0 concrete mixture. The incorporation of WG improves mechanical and thermal properties and reduces the environmental impact of rice husk ash concrete. (c) 2023 The Authors. Published by Elsevier Espana, S.L.U. on behalf of SECV. This is an open access article under the CC BY -NC -ND license (http://creativecommons.org/licenses/ by-nc-nd/4.0/).