Evaluation of strength characteristics and identifying the optimum dosage with the impact of partial replacement of recycled fine and coarse aggregate from construction and demolition waste. (2022)

• Record Type: Journal Article
• Authors: Vivek Kumar, C.; Palanisamy, M.; Balakrishna, C.; Pooja Sri Reddy, S.; Robert Ravi, S.
• Is Part Of: Materials today. Volume 66:Part 4(2022)
• Page Start: 1699
• Page End: 1709
• Publication Date: 2022
• Subjects: Recycled coarse aggregate -- Recycled fine aggregate -- Compressive strength -- Split tensile strength -- Flexural strength; CD Construction & Demolotion -- Rca Recycled Coarrse Aggregate -- Rfa Recycled Fine Aggregate -- Nca Natural Coarse Afggregate -- Nfa Natural Fine Aggregate -- CS Compressive strength -- STS Split Tensile Stremgth -- FS Flexural Strength -- SEM Scanning Electron Microscope; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2022.05.265
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: Natural Sand as fine aggregate (FA) and different sizes and forms of gravel or stones as a coarse aggregate (CA) are used in traditional concrete. Alternative aggregate elements, primarily as a potential application for recycled resources, are gaining in popularity. Although many new types of aggregate substitutes are being studied, along with granulated slag, rice husk ash, or multiple industrial wastes like fiberglass waste products, finely ground plastics, paper, and wood products or wastes, sintered sludge granules, and many others, there is now a lot of work to be done. This study is taken up to utilize the recycled coarse aggregate (Rca) and recycled fine aggregate (Rfa) as a replacement for natural aggregate (NA) in concrete mix and required to find the percentage of Rca and Rfa, as the strength of concrete cannot be achieved by using higher percentage. The purpose of the study is to compare recycled coarse aggregate (Rca) and recycled fine aggregate (Rfa) with natural coarse aggregate (Nca) and sand in terms of specific gravity, water absorption, particle size dissemination. Further, this study will also consider the difference between the performance of Recycled Aggregate Concrete (RAC) for different percentages of recycled coarse aggregate (Rca) and recycled fine aggregate (Rfa) i.e., for 0%, 10%, 15%, 20%, 25%, 30%, 35% replacement. The present study is an investigational study on the behavior of recycled aggregate concrete indicating coarse and fine aggregates for the strength, also identifying the optimum dosage of Rfa, Rca, Nca and Nfa with their performance levels and the relationship between compressive strength (CS), Split Tensile Strength (STS) and Flexural Strength (FS). It has been observed that optimum dosage of Recycled Aggregate proportion has been identified as M1 with Cement + 90% Nfa + 90% Nca + 10% Rfa + 10% Rca + W + 1% SP in CS with 40 N/mm 2 and 20% increase in STS and 16% decrease in FS compared with Conventional Concrete (CC).