INFLUENCE OF GUAR GUM POWDER ON FRESH & HARDENED PROPERTY OF SELF-COMPACTING CONCRETE

Abstract

Self compacting concrete is a latest trend in concrete technology because of ability to compact under its own weight and also due to its high resistance of segregation and bleeding; by using such kind of concrete in construction work economy can be achieved due to elimination in vibration and compaction. In this research the results show that for constant flow ability of the SCC, replacement of super plasticizer with guar gum requires an increase in water/powder ratio and a reduction in super plasticizer dosage. Both additions degraded the flow ability, consistence retention and hardened properties but not to a prohibitive extent. By limiting the content of guar gum powder not greater than 0.5% replacement of cement and by keeping super plasticizer content same as 0.8% of water gives better result than normal concrete in terms of strength. In this research Guar gum powder as viscosity modifying agent and super-plasticizer is used, by using particular amount of both admixtures higher compressive strength, flexural strength and split tensile strength can be achieved. Both admixtures are replaced with cement content which improves flowing ability and strengthening characteristics of concrete.