Influence of rubber on mechanical properties of conventional and self compacting concrete

Abstract

The present study is carried out an experimental investigation on both fresh and hardened properties of conventional and self compacting concrete (SCC) containing waste tyre rubber. A comparison study between conventional rubberised concrete (CRC) and self compacting rubberised concrete (SCRC) is carried out. In both CRC and SCRC, the replacement of rubber varies from 0 to 20 % with coarse aggregate. The rubber chips of size 5 and 10 mm are used. The total volume of rubber chips are replaced in coarse aggregate i.e. 40%from 5mmsize and 60%from 10mm size. The mix design of conventional concrete was targeted for M30 grade of concrete. The mix proportion of the concrete was 1:1.03:2.37 with water cement ratio of 0.375. CERA HYPERPLAST XR-W40 high end super plasticisers are used for the production of SCRC. The test results indicate that there was a reduction in the strength of CRC as compared with the SCRC. However, in both CRC and SCRC the replacement of 5%rubber chips with coarse aggregate gives more strength than other replacement.