Abstract
The study presented herein investigates the effects of particle size and volume content of waste tire rubber on the flexural strength, abrasion and freezing thawing resistances of pervious concretes. Two types of scrap tire rubber wastes, namely crumb rubber and tire chips, were used in the production of rubberized pervious concretes obtaining by partially replacing of single sized natural coarse aggregate with equivalent volume of rubber. The study was conducted at constant water-to-cement ratio of 0.27 with cement content of 450kg/m3. The rubberized pervious concretes were produced by replacing the tire chips, crumb rubber and fine crumb rubber, which was obtained by sieving the crumb rubber from 1-mm sieve, at two different contents of 10% and 20%. Also, tire chips–crumb rubber and tire chips–fine crumb rubber mixtures were utilized in the rubberized pervious concrete production at same contents. Pervious concrete samples with and without tire rubber were tested for flexural strength, abrasion and freezing–thawing resistances. The test results revealed that use of rubber significantly enhanced the abrasion and freezing–thawing resistance while it decreased the flexural strength of the pervious concretes.
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