Ali Farshchi - University Student in Civil Engineering Azad University
Ebrahim Komaki - University Student in Civil Engineering Azad University
Amir Sedighi - Lab Technical Manager in Takinbeton Company
Ali Najafi - Executive of Residual Management Organization of Mashhad Mayoralty

In the recent decades, development of car manufacturing industry has caused the optimized use of used rubber as one of the environmental dopants to be considered by the researchers, on the other hand, by passing time the stock place of rubber has caused to grow different kinds of harmful animals and burning this rubber has a great impact on greenhouse gases like carbon dioxide. One of the useful ways for omission these materials from the environment cycle is using them as one of the concrete materials.[1] According to the investigation by the researchers, using the used rubber in the concrete has influenced on mechanical and dynamical concrete traits such as; more energy absorbance, better flexibility, resistance against crack and reduction in density. One of the negative traits of using used rubber in the concrete is the reduction in compressive resistance and water absorbance. [2,3] In this research the way that the used rubber is utilized in the concrete is surveyed and also has tried to consider the optimized mixture in a way that can decrease the concrete water absorbance besides considering all of the rules about prefabricated concrete experiments.

Used rubber, Water absorbance of rubber concrete, Rubber granule in concrete, Compressive resistance of rubber concrete