Effect of Alccofine and M-Sand on the modulus of elasticity of sustainable concrete

¹ Department of Civil & Structural Engineering, Annamalai University, Chidambaram, Tamil Nadu, 608001, India.
² Department of Civil Engineering, R.V.R.& J.C College of Engineering, Guntur 522019, India.

^* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.

Published online: 3 August 2026

Abstract

In this study to examine the effect of Alccofine (AF) on modulus of elasticity of concrete with M-Sand as fine aggregate, mixes of M25 and M40 grades of concrete were prepared using different proportions of Alccofine (0%, 5%, 10%, 15%, 20% and 25%) as a replacement of cement. Compressive strength (CMS), stress-strain relationship and modulus of elasticity (E) were measured after twenty eight days of curing. It was observed that the addition of Alccofine resulted in the strengthening of the concrete, its stiffness and elastic response. The stress–strain curves gave steeper ascending curves and stress carrying capacity than the control mixes, which meant better deformation resistance. The Modulus of elasticity showed a rise with the increment of Alccofine content up to 20% after that, there was a slight decrease. Among the investigated mixes, the optimum performance was achieved at 20% Alccofine replacement. Furthermore, a strong positive correlation was observed between CMS and modulus of elasticity, confirming that increased concrete strength was accompanied by enhanced stiffness. The findings demonstrate the effectiveness of Alccofine in improving the elastic properties of M-sand concrete and highlight its potential as a supplementary cementitious material (SCMs) to produce sustainable concrete.