A study on mechanical properties of tire replaced concrete using rebound hammer test and shrinkage test / Muhamad Izwan Ahmad Fuad

Large quantities of waste tires are generated every year. The proper disposal
of the tires creates an increasing problem that needs to be addressed. Many
researchers have investigated the use of recycled tire products in several
traditional Civil Engineering materials. The use of crumb rubber in Portland
cement concrete has been the subject of many research projects over the last
years. This study is focusing on the use of crumb rubber, a byproduct of the
tire recycling process, in concrete mixtures. Different percentage of crumb
rubber were fabricated and tested in rebound hammer test and shrinkage
test. The main variable in the mixtures was the volumetric percentage of the
crumb rubber. The experimental results indicate that although the surface
hardness is reduced when crumb rubber is used, the shrinkage of the
material greatly decreases. Moreover, concrete mixed with crumb rubber up
to about 30% by cement weight is found to improve non-structural crack
resistance.