Combined Effect of Silica Fume, and Glass and Ceramic Waste on Properties of High Strength Mortar Reinforced with Hybrid Fibers

This study aims to investigate the effect of ternary combination of silica fume, and glass and ceramic waste as a partial replacement of cement on selected properties of mortar in the presence of steel-polypropylene hybrid fibers. Thirteen mixtures have been made: one control mix and twelve mixes in which the cement has been replaced by constant proportion (30% of cement weight) of ternary combination of silica fume, and glass and ceramic waste. The steel fibers have been added in the proportion of 1% while polypropylene fibers have been applied in the percentages of 0.25%, 0.5% and 1% (by volume for both fibers types). The flow rate, the compressive and the flexure strength and the bulk density tests have been examined. The hardened tests have been carried out at age of 28 days. Results have showed that the flow rate values have been reduced after replacing cement with the combination of silica fume, and glass and ceramic waste. Moreover, it has been found out that the compressive and flexure strength values for all combination mixtures have been higher than that for control mixture. The enhancement ranges have been 31% to 62% for compressive strength and 3% to 25% for flexure strength. In addition, results have demonstrated that there has been no significant change in bulk density values for cement replacement mixtures related to the one for control specimens.