The effect of crushed glass and metakaolin waste in the properties of modified concrete

Abstract

This paper examines the possibility of using waste crushed glass as a substitute for sand, and waste from the production of foaming agent - metakaolin as a substitute for cement in the production of modified concrete. Concrete mixes were formulated with different amounts of metakaolin (M) replacing cement at 5 %, 10 %, 15 % and 20 % and 25 % crushed glass (TS) replacing sand. From the results of the research, it can be said that crushed glass waste and metakaolin waste can be used in the production of modified concrete, while reducing the amount of cement and sand. The optimal amounts of waste to replace part of cement and sand is 10 % of metakaolin waste and 25 % of crushed glass waste, with which concrete mix increase density, ultrasonic pulse velocity (UPV), compressive strength, frost resistance cycles, absorption decreases. Thus, using metakaolin waste 10 % (replacing Portland cement) and 25 % crushed glass waste (replacing sand) in concrete mixes results in more durability concrete can be used in building structures.