Feasibility study of usage of recycled coarse aggregates and fly ash for attaining sustainability in the construction sector: a systematic approach
by Gyana Ranjan Nayak; Rakesh Kumar Patra; Bibhuti Bhusan Mukharjee; Sanghamitra Jena
International Journal of Sustainable Materials and Structural Systems (IJSMSS), Vol. 5, No. 3, 2021

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.

Online publication date: Thu, 23-Sep-2021

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