Effect of Natural Admixture on Compressive Strength of Flyash Blended Concrete

A durable concrete is one that has ability to withstand the damaging effect of the environment and of its service conditions without undue deterioration and excessive maintenance over the design life of a structure. The used of high performance concrete is an alternative in producing high-strength concrete, durable and construction friendly. In the present investigation, experimental results on compressive strength of concrete made with various mixture proportions i.e., fly ash (0%-20%) and egg (0%-0.35%) have been presented. The increasing trend in compressive strength and UPV values observed from 0% egg dosage to 0.35% egg dosage at all curing periods. At 0.5% egg dosage the compressive strength has decreased at all ages. Similar trend has been observed for the other fly ash proportions i.e. from 10% to 15%. At 20% fly ash dosage, all the values have decreased when compared to the 15% dosage mixes. From the results it is observed that 0.35% egg dosage and 15% fly ash dosage can be taken as optimum dosages.