Studies on Chemically Treated Rubber Tube as a Replacement for Coarse Aggregate in Concrete

Disposal of waste tires and tubes is a huge problem globally. The present study mainly focuses to study the compressive strength of chemically modified waste types in the construction. Initially the waste tubes are collected and replaced for coarse aggregate at 5%, 10%, 15% and 20% respectively without any surface modification. Results indicate the increase of waste tubes decreases 70% of its compressive strength at 20% replacement. At 5% increment of rubber, the compressive strength decreases up to 40%. The rubber tubes are then chemically treated with calcium hypho chlorite and sodium hydroxide and substituted with coarse aggregate, and the results illustrates that the chemically modified rubber-based aggregates are in par with conventional concrete in compressive strength. The higher compressive strength is attained because of improved bonding between aggregate and cementitious matrix. Hence it is recommended that modified rubber aggregate can be replaced at 5% for coarse aggregate and it will be a viable option to increase the compressive strength in the concrete.