A Study on Strength of Concrete with Partial Replacement of Cement with Saw Dust Ash and Steel Fibre

Abstract

A study of mechanical strength of concrete made using Ordinary Portland Cement with a partial replacement of saw dust ash ranging from 5% to 20% and again by incorporating steel fibre of 0.5%, 1%, 1.5% with same SDA percent .The grade of concrete designed here was M 25. Slump and compacting factor tests were carried out for fresh concrete and compressive strength, split tensile strength, flexural strength tests for hardened concrete. The compressive strength and split tensile strength tests of normal and SDA concrete was done at the age of 3, 7, 28 and 56 days and SDA concrete containing steel fibre was tested at the age of 3, 7 and 28 days. The flexural strength of saw dust ash concrete with & without steel fibre was tested at the age of 28 days. From the experimental results, it was found that there is a reduction in strength with an increment of saw dust ash. But while adding steel fibre to SDA, it is observed that the fibre reinforced saw dust ash (FRSDA) concrete has an increase in strength twice than that of the SDA concrete at 3 rd , 7 th and 28 th days.