Study on Effect of Clay Content in Fine Aggregate and Its Behaviour in Concrete

Concrete is a mixture of cement, fine aggregate, coarse aggregate and water. A study is conduct to determine the advanced concrete engineering properties viz. Compressive Strength, Tensile Strength, Flow Ability, Durability and Water Absorption Capacity of the partially replacement of river sand and ordinary Portland cement. This paper deals the fresh and hardening property of concrete made with clay sand and fly ash as cement replacement in different percentage of amounts and also the experimental studies on physical and micro structural properties of fly ash and clay are presented in this paper. While comparing the properties of natural sand (spherical particles) gives better interlocking between the particles. Hence, enhancement in strength and durability characteristics may be obtained. For this study, three mixtures were prepared with a fly ash (cement) 2%, 4%, 6% of sand (clay) content 4%, 7.5%, 10%.The optimum percent of replacement Fly ash and clay is found by considering optimum compressive strength result. Fresh concrete properties were assessed by means of slump test and compaction factor test, while hardened properties were evaluated by means of compressive strength, split tensile strength ages of 7, 14, and 28days and flexural strength ages of 28days. The load versus deflection behavior of optimum beam is compare with conventional beam. For this study, the Samples of concrete (e.g. cubes, cylinders and beams) are made. It was found that 0.45 water/cement ratio produced higher compressive strengths, tensile strength and better workability for M25 mix, proportion for the mix is considered. These results compare favorably with those of conventional concrete. The concrete was found to be suitable for use as structural members for buildings and related structures.