Effects of Micro Silica on Mechanical Properties of Roller Compacted Concrete Pavement (RCCP) in Cold Regions

Nowadays with development in transportation networks, majority of countries revenue is spent on maintenance and preservation. One of the pavements is Roller Compacted Concrete (RCC) that is most economical and durable type of pavements. As regard most of RCC pavements subjected to weather conditions especially humidity, freezing and loading due to traffic gradually have become destroyed. Therefore, durable of RCC against thaw and freezing cycles and suitable time for transport and operation is very important. Main purpose of this research is evaluation of micro silica effects on mechanical properties of RCC in cold regions. For this target, material with 5, 10, 15, 20 and 25 percent micro silica mixed and 2% aerosol matter added. Mechanical properties of mixed materials with using compression, indirect tensile strength, thaw and freezing cyclic, water absorbing, density, vebe and specific gravity tests evaluated. Generally, results of tests showed that with adding 10% micro silica in RCC performance get better.