This study was performed mechanical properties of porous concrete according to fiber mixing conditions. As the results of study, When considering the void ratio, compressive and flexural strength of porous concrete, the proper type and content of fiber is thought to be PVA 0.05%.

This study was performed an evaluation of Mechanical Properties of double layered concrete. As the results of study, When considering the bond strength of double layered concrete, the proper slump of normal concrete is thought to be 12cm. Also, compressive and flexural strength of double layered concrete is better than when only porous concrete is composed.