Thermal Endurance of High Strength Fiber Reinforced Concrete.(Dept.C)

Abstract

Thermal properties of high strength concrete specimens containing different contents of polypropylene fibers are experimentally investigated. The specimens were subjected to elongated period of high temperature, and thermal conductivity was measured. Reducing the water to cement ratio helps in reducing the concrete porosity and increasing the strength and results in different internal structure for high strength concrete compared will ordinary concrete and therefore influence the thermal parameters. Normally, properties of coarse aggregates tend to govern the overall thermal properties of ordinary concrete. Thus natural gravel, basalt, granite and dolomitic limestone are employed in the experimental program. Thermal conductivity is measured for specially designed specimens. A comparison is carried out with the corresponding results of ordinary concrete for dry and fully saturated samples. The findings indicate some major differences in the thermal features, which should be addressed in thermal analysis and insulation problems.