A Fundamental Study on Concrete Substituted Cement with Industrial By-Products

Abstract

In this research, we have carried out the fundamental research on development of high strength concrete using the powder combining three industrial by-products as substitute of cement. The by-products used were fly ash of type II, ground granulated blast-furnace slag and gypsum. As a result,-it was possible to make a high strength paste, using vibrating compaction, with a water-powder ratio of 25%, The paste had compressive strength greater than 60 N/mm2 after curing for 91 days. Further we found it was possible to make high strength concrete of varying sand-aggregate ratios which all had a compressive strength of about 30 N/mm2 after curing for 28 days and 40 N/mm2 after curing for 91 days. Finally we obtained the optimum mixture proportion of concrete is unit water content = 170 kg/m3, water-powder ratio = 25%, and sand-aggregate ratio = 40%, For each of these results no cement was used.