Title: Feasibility study of usage of recycled coarse aggregates and fly ash for attaining sustainability in the construction sector: a systematic approach
Authors: Gyana Ranjan Nayak; Rakesh Kumar Patra; Bibhuti Bhusan Mukharjee; Sanghamitra Jena
Addresses: Department of Civil Engineering, Veer Surendra Sai University of Technology, Burla, Odisha 768018, India ' Department of Civil Engineering, Indian Institute of Technology Roorkee, Uttarakhand 247667, India ' Department of Civil Engineering, Biju Patnaik University of Technology, Rourkela, Odisha, 769015, India ' Department of Civil Engineering, Veer Surendra Sai University of Technology, Burla, Odisha 768018, India
Abstract: The purpose of this systematic experimental investigation is to examine the impact usage of coarse fraction of aggregates retrieved from waste concrete collected from construction and demolition site (known as recycled coarse aggregates, RCA) and fly ash (FA) on concrete. For this, concrete mixes are designed incorporating 0%, 50% and 100% RCA along with 0%, 5%, 10%, 15%, 20%, 25%, and 30% of FA as cement substitution for this purpose of assessing feasibility of obtaining sustainability in the field of construction materials. Several characteristics of concrete such as workability, compressive strength (CS), flexural and split tensile strength, rebound number (RN), volume of voids (VV), water absorption (WA), modulus of elasticity, density, ultrasonic pulse velocity (UPV) of concrete mixes has been evaluated. The outcomes of this experimental study reveal that degradation in strength and non-destructive parameters and enhancement in VV and WA has been detected with the introduction of RCA.
Keywords: compressive strength; modulus of elasticity; coarse recycled concrete aggregates; rebound number; ultrasonic pulse velocity; UPV; recycled coarse aggregates; RCA.
International Journal of Sustainable Materials and Structural Systems, 2021 Vol.5 No.3, pp.239 - 261
Received: 21 Jun 2020
Accepted: 20 Feb 2021
Published online: 23 Sep 2021 *