Rubber concrete modified by recycled

As mentioned earlier, the addition of rubber particles typically leads to the degradation of mechanical properties of the concrete due to a poor adhesion. However, it was shown that the adhesion of GRT of an average size of 120 ttm to cement was improved by applying surface plasma treatment to 

The possible application of cement mortars containing GRT as a flexible interface material was investigated (Nehdi and Khan, 2004). The effects of the water/cement ratio, GRT content, and particle size on the mechanical properties in uniaxial and triaxial compression of the mortars were studied. It was suggested that cement mortars containing GRT particles have a superior ductility to satisfy the requirement for deformations occurring around tunnel linings, pipelines, and other buried infrastructure. 

A review of research on the performance of concrete containing GRT particles was recently published (Pacheco-Torgal et al., 2012). In particular, this review discussed the effect of GRT treatment, the size of GRT particles, and the replacement volume on the fresh and hardened properties of concrete. A workability of fresh concrete defining its flowability and the compressive and tensile strength, toughness, elastic modulus, thermal and sound properties, and durability of hardened concretes containing the tire rubber waste was also discussed. 

Asphalt can be blended with tire rubber to modify the properties of the asphalt. This is an important market for use of GRT. In 2005, 2007, and 2009, an estimated 120, 100, and 175 million pounds, respectively, were used in the United States (Read, 2012). Mostly, these were consumed in California, Arizona, and Florida. Other states are also recognizing the benefits of the modified asphalt. It was projected that asphalt industry can adsorb up to 40% of scrap tires (Anonymous, 1993). 

Utilization of scrap tire rubber in asphalt has advantages in the performance of roads and their longevity. This includes enhanced ductility, crack resistance, skid resistance, and noise reduction. Disadvantages of the rubber-modified 

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The use of waste rubber and other polymers such as polyethylene terephthalate (PET, from bottles) to modify concrete is an active area of research. One of the attractions of this recycling is the potential to use up large amounts of waste material. A recent paper [45] by... 

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