Abstract

 Because of environmental problem associated with the disposal of waste automobile tires we need to find an environmentally friendly solution.In this research different mixes were prepared with Cement-Sand ratio (1:3) and Water- Cement (0.5). Two sets were prepared by partially or full replacing the sand with crumb rubber to fabricate the rubberized mortar mixtures. The first set include fine crumb rubber with particles size (0.3-1 mm), The second set include coarse crumb rubber with particles size(1.18-2.36 mm). Each set was consist of different percentage of replacing the sand by crumb rubber (10,30,50,100%) by volume. Tests were conducted, including density, Ultrasonic Pulse Velocity,Thermal Conductivity, and measuring Acoustic Impedance. several results obtained including. The full replacement (100%) of sand by crumb rubber was the highest insulation properties(acoustic impedance and thermal conductivity), while it was the lowest in density. addition of recycling rubber decrease the density of mortar, the increase in percentage of recycling rubber cause increase in insulation properties,different particles size of recycling rubber effects on the behavior of the measuring properties.

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