Experimental study on the high strength concrete with different fine aggregate

The results of an e xperimental study on the high strength concrete (HSC) with different f ine aggregate is presented. The study mainly concern on the influence of the characteristic of shape and texture of the fine aggregate on mec hanical prope rties of HSC . Two types of fine aggregate were used namely crushed granite sand and natur a l river sand. The HSC mixtures consist of high cement content of 530 kg/m 3 and low water - cement ratio of 0.30 was selected. The presence of crushed rock dust in crushed rock sands that influence the mechanical properties of HSC was also considered in this study. HSC mixtures comprises of crushed granite sand with various percentage of crushed granite dust content such as 0, 5, 10 a nd 15% were prepared . The compressive strength of the HSC was determined by conducting a series of cube compression tests. The experimental results indicated that: (a) The performance of HSC in term of compressive strength was superior with crushed granite sand (angular and rough grains) rather than natural river s and (rounded and smooth grains). (b) amount of 10% of crushed granite dust content was found to improve the compressive strength of the HSC mixtures, thus, the 10% was considered as the optimum du st content because the compressive strength of the HSC decreased slightly as the content of crushed granite dust increased to higher amount of 15 %