3rd International Engineering Conference on Developments in Civil & Computer Engineering Applications (IEC2017)
Title: Rheological Behavior of Self-Compacting Concrete Incorporating Crumb Rubber Particles As Fine Aggregate
Authors: Khaleel H. Younis, Harth S. Naji, Khalid B. Najim
DOI: 10.23918/iec2017.08
Abstract: The utilization of the huge waste resulted from discarding end-of-life tires in the production of self-compacting concrete (SCC) is a decent and sustainable solution to mitigate serious environmental issues. The aim of this study is to evaluate the rheological properties and the density of SCC with different content of crumb rubber extracted from waste tires. Different rheological properties tests were conducted including: slump flow, J-ring, L-box, V-funnel and segregation resistance tests. Five SCC mixtures were prepared. The reference mix made with natural sand while the other four mixes were made with crumb rubber in which the natural sand was volumetrically replaced by crumb rubber at ratios of 10 %, 20 %, 30 % and 40 %, respectively. The results show that the addition of crumb rubber decreases the slump flow, decelerates the flow rate and increases the V-funnel time. In the case of L-box test, mixes with crumb rubber exhibited comparable results to that of the reference mix. The segregation resistance was higher for the mixes with crumb rubber than that of the reference mix. Adding crumb rubber to SCC decreases its density.
Keywords: Self-compacting concrete; Rheological properties; Density; Crumb rubber; Waste tires