Experimental investigation on the effect of different types of fine aggregates and cement on real-time measurement of concrete compressive strength using maturity functions

¹ School of Civil Engineering, KLE Technological University, Hubballi, Karnataka, India
² School of Computer Science and Engineering, KLE Technological University, Hubballi, Karnataka, India

^* Corresponding author: chaitanya.a@kletech.ac.in

Abstract

The compressive strength of concrete is one of its significant mechanical properties. The traditional method of measuring the concrete compressive strength requires a lot of time, thereby increasing the project duration. Real-time in-situ measurement of concrete compressive strength will benefit contractors by helping them better monitor the quality of concrete. This paper presents the effect of different types of fine aggregates, namely river sand and M sand, on the temperature measurement of concrete. Using maturity functions, the compressive strength of concrete is measured using an IoT platform. Since the hydration of cement is an exothermic reaction, the effect of different types of cement, namely OPC and PPC, was also studied to check whether any modifications are required in maturity functions to measure the real-time compressive strength of concrete. The results show that the average temperature measured for both types of aggregates is the same; hence, there is no need to change the maturity functions. The prediction of compressive strength of concrete for both types of concrete was made with a coefficient of determination of 98%, and the average temperature for both types of cement was 27⁰C. This shows that the maturity functions developed for OPC and PPC work well without needing any modifications.