The Effect of Glass Powder and Metakaolin on the Self-Compacting Concrete (SCC) Properties

Glass powder and Metakaolin are suitable alternative for part of cement in concrete. The use of waste glass powder in concrete is economic and reduces environmental impacts resulting from the release of recycled glass in nature. On the other side, Metakaolin because of pozzolanic features can increase the resistance of concrete. In this study, by simultaneous use of these two substances in the production of self-compacting concrete, fresh and hardened concrete properties are evaluated. For this purpose, Seventeen mixtures with various percentages of glass powder and Metakaolin (5%, 10%, 15% and 20%) and constant Water/cement ratio equal to 0.32 were made. Fresh concrete tests, including slump flow, T50, L Box and V-funnel and also hardened concrete tests, including compressive, tensile and water absorption for all of SCC mixtures was performed. Results show that by increasing the amount of glass powder, slump flow and V-funnel time increces but compressive and tensile strenght and initial water absorption decreases. By adding metakaolin and increase it to 15%, compressive and tensile strength increases.