The strength properties of self-compacting concrete containing of granulated blast-furnace slag

In this study, the effect of different proportions of granulated blast-furnace slag as replacement of portland cement on strength properties of self-compacting concrete (SCC) was investigated. Slump-flow, t500, V-funnel and L-box tests were achieved for SCCs (%20,%35 and %50) having different proportions of granulated blast-furnace slag as replacement of portland cement (respectively %20, 35 and 50 ). Granulated blast-furnace slag as replacement of portland cement was used as variable only, i.e. aggregates (sand and gravel), cementitious materials and superplasticizer (Chryso) were constant, in all tests. Optimum workability for SCC mixes was obtained by using different water/(cement+fly ash) proportions. In the following day of casting, the specimens were de-moulded and located in standard 20°C water cured for the periods of 7,28,90 and 365 days. At the end of each curing period, a total of 3 specimens were tested for each concrete property. The compressive strength velocity tests were carried out on the cube specimens, whilst the splitting tensile tests were carried out on the cylindrical specimens. It was found that different proportions of granulated blast-furnace slag as replacement of portland cement had an important effect on properties of self-compacting concrete. The results showed that use of %20 and/or %35 granulated blast-furnace slag as replacement of portland cement increased the strength properties of SCC according to other fly ash proportions as replacement of portland cement .