Study on the elastic modulus of concrete using recycled aggregates from waste concrete in rigid pavement construction

Abstract

This study evaluates the potential use of waste cement concrete in the construction of road and airport pavement structures. One of the key mechanical properties of concrete investigated is the modulus of elasticity. Laboratory experiments were conducted on recycled aggregate concrete (RAC) to measure the performance and mechanical characteristics of this material made from waste cement concrete. The research focuses on collecting data on the properties of cement concrete waste, testing both recycled and conventional materials and analyzing the data to assess the feasibility and performance of using waste cement concrete in road and airport pavement structures. The experimental results of the modulus of elasticity of concrete using recycled aggregates were analyzed to determine the influence of the replacement ratio of coarse recycled aggregate for natural stone, the type of sand used (natural sand or sand crushed from RCA) and the specimen age on this property. The study indicates that the modulus of elasticity is a critical characteristic of materials used in load-bearing structures.

Keywords: Construction waste, concrete waste, recycled concrete aggregate, recycled aggregate concrete, cement concrete pavement, rigid pavement.