A Comparative Study On Compressive Strength Of Concrete With The Variation Of Coarse Aggregate And Curing Condition

Abstract

Concrete is a mixture of cement, sand and Brick chips, stone chips and water in some specified proportion which is generally used for R.C.C and C.C. We have worked on a comparative study on the effect of membrane curing of concrete work. Firstly, 24 concrete cylinders of 4 x 8 inch were made and eight of them were cured continuously in the bathtub for 28 days. The rest of the cylinders were covered with jute membrane like the local construction side. Eight of them cured after 2 hours and others 3-hour intervals. In this process it was tried to find out reduction factors that should be multiplied with the claimed cylinder strength for a structure that was cured under membrane curing. Curing is essential if concrete is to perform the intended function over the design life of the structure while excessive curing time may lead to the escalation of the construction cost of the project unnecessary delays. The new tread of using high strength concrete in construction has caused a need for the use of 4 x 8 in. Cylinders for assurance testing. A controlling factor that affects the curing of specimen that can be tested in compression machine is the strength of the concrete on evaluation The curing method for wet covering immersion under water is the type of cement ordinary Portland cement (OPC). The study demonstrates that the method and duration of curing greatly affects the strength characteristics of concrete. Hence, quality control for proper field curing is of the utmost importance. Form our study, it can concluded that the Bhurungamari Stone and the immersion curing method gives higher compressive strength than Indian Black Stone and wet covering curing method respectively