A Review on Optimizing M70 Grade Concrete Mix Design with Fly-Ash (IS: 10262 – 2019)

Abstract

The main object of this paper is to design a mix for High-strength concrete (HSC) of M70 grade concrete for various water-to-cement ratios using proper proportion, admixtures, and manufactured sand with the required workability of concrete to adopt any shape and develop strength on hardening had made one of the most versatile materials on the earth. Concrete comprises various ingredients that help create a good matrix of it. Concrete ingredients affect its various characteristics like strength, durability, etc. High-strength concrete has a compressive strength of up to 100 MPa compared to conventional concrete, which has a compressive strength of less than 40 MPa. The low water-cement ratio is a crucial aspect that can be achieved using chemical admixtures such as superplasticizers. The study follows the IS Method of Concrete Mix Design as per IS Code 10262:2019. Also, in the design mix of HSC, the fly ash was used at various percentage replacement levels, i.e., 15%, 17.5%, and 20%, respectively.