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Title: Mechanical Properties of Rubberized Concrete Containing Recycled Concrete Aggregate

Author(s): K. Tamanna, M. Tiznobaik, N. Banthia, and M. Shahria Alam

Publication: Materials Journal

Volume: 117

Issue: 3

Appears on pages(s): 169-180

Keywords: compressive; crumb rubber; flexural; recycled concrete aggregate; rubberized recycled aggregate concrete; splitting tensile

DOI: 10.14359/51722409

Date: 5/1/2020

Using recycled scrap tire and construction and demolition waste as aggregates in concrete will not only facilitate an environmentally sustainable solution to solid waste disposal but also will significantly contribute to alleviating the ever-growing demand for natural aggregates in concrete production. However, only limited studies focused on the use of rubberized recycled aggregate concrete (RRAC), which lacks in-depth scrutinization of its material behavior with respect to conventional concrete. The first stage of this study is focused on investigating the effect of pre-treatment of crumb rubber (CR) with three levels of NaOH concentration on rubberized mortar specimens. The second stage consists of an experimental investigation on the mechanical behavior of concrete comprising CR and recycled concrete aggregate (RCA) each at three replacement levels of natural fine and coarse aggregates, respectively, at a water-cement ratio (w/c) of 0.34. The results indicate RRAC yields satisfactory compressive and flexural behavior for use in structural concrete.