Strength and deformation behaviors of roller-compacted rubberized concrete

The mechanical strengths and deformation behaviors of roller-compacted rubberized concrete (RCR) were studied by keeping compressive strengths of all specimens at 40 MPa. The rubber particles were incorporated by replacing an equal volume of sand，and the rubber volume fractions were 5%，10% and 12%，respectively. The test results show that the rigid behavior of roller compacted concrete (RCC) is improved by the addition of rubber particles，and the specimens containing tire rubber exhibit ductile characteristic during the compressive test. The relations among cubic compressive strength，axial compressive strength，tensile strength and flexural strength of RCR are similar to those of the normal cement concrete. In comparison with control concrete，the tensile strength，flexural strength and ultimate tensile elongation of RCR increase with the increase of the rubber content while their compressive strengths are kept at the same level. Unfortunately，no improvement is observed for the shrinkage behavior. On the contrary，a little increase is found in both of shrinkage velocity and total shrinkage for the specimen containing tire rubber .