Design of High Compressive Strength Concrete Mix without Additives

Abstract

In this study selected materials, with high specification using special production techniques, the properties ,the mix design procedure and mix proportion of the high strength concrete (HSC) were discussed. Different proportions of Ordinary Portland cement (410, 430 & 450) kg/m3 with different crushed Basalt and uncrushed Granite coarse aggregate amount (1120 &1050) kg/m3 and fine aggregate of fine modulus of 3.65 were used. Eight concrete mixes were prepared: two as control mix for crashed Basalt and uncrushed Granite, three with crashed Basalt and three with uncrushed Granite coarse aggregate with mix proportions (1:1.66:2.73), (1:1.42:2.44) and (1:1.22:2.33), (cement: fine aggregate : coarse aggregate) respectively. Specimens of trail mixes were tested. The concrete (Mix3) consist of Granite (1:1.22:2.33) with w/c of 0.46 was found to give the highest value of strength in the 28 and 56 days in comparison with other two mixes. It gave compressive strength 56 and 64 N/mm2 in 28 and 56days respectively.