Experimental Study to Determine the Optimum Value of Super Plasticizer for Self Compacting Concrete

Abstract

Self-compacting concrete is suitable for placing in formwork with congested reinforcement without vibration. Self-compacting concrete development must ensure a good stability between the deformability and the stability also the compact-ability. In this study the trials performed on concrete mix by increasing or decreasing the value of the ingredients or varying the value of the admixture to perform the required tests. Then two sets for self-compacting concrete (i.e. addition of 1.14%, 1.16% by the total weight of the cement). The mix design has prepared according to IS 10262:2009. The mix proportion of M25 grade came out to be 1:1.59:2.76 with w/c ratio 0.45. The required tests were performed (V-funnel test, J-Ring test, L-box test) to evaluate the optimum dosage and also determined the compressive strength at optimum dosage. As a result, it has been successfully conducted that the optimum dosage for the self-compacting concrete is 1.14% by volume of the cement material. After undergo cost analysis the best result came out to be from self-compacting concrete optimum mix derived from M25 mix. By changing the values of the material the cost of SCC is reduced from the NVC mix, the final cost cutting came out to be 14.29% as compared to the conventional cement concrete mix. Hence it is recommended that the use of self-compacting concrete for the construction of the structure can be good option for the mega building structures.