The scarcity and availability at reasonable prices of sand and aggregates are now giving anxiety to the construction industry. Over the years, deforestation and extraction of natural aggregates from river beds, lakes and other bodies of water have resulted in huge environmental problems. Erosion of existing topography often leads to flooding and landslides. In addition to the filtration of the rainwater obtained by natural sand deposits is being lost, causing pollution of the water reserves used for human consumption. Therefore, in order to avoid pollution, the authorities impose ever more stringent restrictions on the extraction of natural aggregates and their crushing. The best way to overcome this problem is to find alternative aggregates for construction rather than conventional natural aggregates. Rubber tire aggregates of discarded tires in sizes from 10-10 mm, 10-4.75 mm and 4.75 mm down can be partially replaced by natural aggregates in the concrete concrete construction.
About a crore 10 lakhs all types of new vehicles are added every year to Indian highways. The increase of about three crores of discarded tires each year pose a potential threat to the environment. The new tire is made of natural rubber (also called virgin rubber), styrene-butadiene rubber (SBR), polybutadiene rubber (PBR), carbon black, pneumatic tire cable, rubber chemicals,
A wide variety of waste materials are considered viable and even valuable additives for concrete. Some of these materials include cellulose, fly ash, silica fumes and wood particles. Rubber obtained from scrapped tires is considered as the most recent waste materials that have been examined because of their vital use in the field of construction . Worldwide, rubber production is increasing every year. Different countries of the world have different rates of rubber production, for example the United States produces 3.6 million tonnes of rubber per year . Iran produces 100,000 tonnes of rubber per year ; Similarly, Malaysia produces 200,000 tonnes of rubber per year . These numbers increase with the increase in vehicle production. Research has shown that discarded rubber tires contain materials that do not decompose under ambient conditions and cause serious problems. A choice of decomposition is burning, but it also leads to harmful contamination. On the basis of these problems tires can be used as aggregates in concrete . It is very difficult to manage the waste produced by the rubber industry and manage waste. It is not a form of easily biodegradable waste. According to Guneyisi et al 2004 Rubber waste is not readily biodegradable even after a long stretch passes after landfill treatment. Siddique and Naik 2004 stated that rubber tire waste has been used as fuel for furnaces as a form of feed for carbon black and also found that hazardous environmental pollution caused by the combustion of rubber Tire in ovens is reduced considerably compared to black smoke fuel. Toutanji, in 1996 stated that the usefulness of rubber tires in the concrete industry, ie noise barriers, electricity poles, and in the mixing plants of asphalt pavements. Aiello and Leuzzi, 2010], And Najim and Hall, 2010 commented that recycled rubber tire waste is a promising material in the construction industry and the only reason for this is the light weight of the resulting concrete when the rubber tire is incorporated into it As an aggregate Replacement (partial or complete). The elasticity of energy absorptive capacity of the concrete after the addition of rubber tires as a replacement of coarse aggregates in the concrete has been showing some promising results as demonstrated by Eldin and Senouci, 1993 , Toutanji, 1996 , Khatib and Bayomy, 1999 , Siddique and Naik 2004 , Batayneh et al., 2008 , Aiello and Leuzzi, 2010 , and Najim and Hall, 2010 . Aiello, MA, and Leuzzi, F. 2010 , commented that the use of waste products in concrete has an attractive advantage and attention worldwide and the reason for this is awareness among researchers in the form of awareness Environmental protection. Batayneh, MK, Marie, I. and Asi, I. in 2008 stated that stockpiles of rubber tires are very dangerous to society, as they pose a great environmental concern, fire hazard and breeding provision. For several insects like mosquitoes that can carry very diseases of this source. Ganjian, E., Khorami, M. and Maghsoudi, AA 2009 stated that tire fires have remained a major environmental problem as fires detected by tires are very dangerous and that fires can be burned during Months, up to an acrid black feather that is visible from several kilometers away. It is a matter of great concern that acorn prunes contain various amounts of toxic chemicals and air pollutants in which it is causing a serious threat to the environment and its inhabitants.