Effect Of Rubber Treatment On Compressive Strength And Thermal Conductivity Of Modified Rubberized Concrete


Waste tires have been studied widely for the last twenty years on several applications such as asphalt pavements, water proofing systems and concrete pedestrian block etc. There are several properties of the rubber could be used usefully in this application such as low density and water proofing property etc. On the other hand any undesirable changes in the properties of the material resulted from adding the rubber particles could be improved effectively by a certain way. The main aim here is to study the compressive strength and thermal conductivity of the rubberized concrete compared with the traditional one and how it affected by using a coupling agent such as SILAN which is used currently in the present study to treat the particles of rubber. Three patches were prepared. Each one consists of three cubic specimens (15x15x15)cm and two disc specimens (5x1)cm. The first patch was the control concrete, the second was the rubberized concrete, in this one 15% the volume of gravel were replaced by waste tires particles and the third was the modified rubberized concrete in this patch rubber particles were treated with SILAN of 0.1% of water as a coupling agent. Compressive strength and thermal conductivity tests were conducted for the three patches. The overall results show that the adding of rubber particles to the concrete to obtain a lightweight one cause a reduction in the compressive strength by about 49.8% from traditional concrete, so to improve this property the SILAN used as a coupling agent to treat the surface of rubber particles and it was found to be very effective in improving the compressive strength so that this strength reduced by about 12.9% from traditional concrete. Also, the added rubber particles decreased the thermal conductivity of the rubberized concrete by about 26.7% from traditional concrete while when rubber particles treated with SILAN, thermal conductivity increased by about 17.8% from traditional concrete.