|Recently, in many universities and institutes it is being studied on the high flowing concrete widely that has high fluidity, viscosity ability. And there are some cases that had been applied to the construction field actually. The flowing properties of high flowing concrete - High fluidity, rheology, lightweight aggregate - is higher than that of plain and flowing concrete. And it is being focused as a remarkable know-how which can make high quality concrete and reduction effect of labor force. This properties of high flowing lightweight aggregate concrete are influenced by the relation ship of several factors ; admixture contents water/binder ratio fly-ash, blast-furnace etc.