Mechanical and Microstructural Performance of M30 Grade Sustainable Concrete with Dolomite Powder and Sugarcane Bagasse Ash as Blended Cement Replacements

Abstract

This study analyzes the combined effects of dolomite powder (DP) and Sugarcane Bagasse Ash (SCBA) used as a binary auxiliary binding composition on M30 grade concrete to enhance its mechanical behavior, durability, and microstructure stability when subjected to aggressive environment conditions. Five different concrete specimens have been fabricated using replacement rates varying from 0% to 30% for DP and SCBA mixture ratios. The experimental studies consist of compressive strength, flexural strength, stress-strain relationship, Elastic Modulus, water absorption, chemical durability during acid attack, and X-ray diffraction (XRD) phase investigation. It was observed that specimen M3 with 10% DP and 5% SCBA mixture attained the maximum values of 28 days compressive strength as 47.84 MPa, flexural strength as 4.84 MPa, Young’s modulus as 17400 MPa, and the minimum value of water absorption as 3.52%.