Studies on the Pressure Loss Attendant with Super Workable Concrete Pumping

Abstract

The pumpability of Super Workable Concrete is not clear under the exsisting circumstances. In this paper, it considered about the pressure and the pressure loss which occurred in the pipe as a result of the pumping experiment used nine kinds of concrete. The concretes were mainly Super Workable Concrete which used flyash much.
Based on the value of the pressure and the pressure loss which was gotten by the experiment, it found out a exchange coefficient about the mix proportion, the piping condition, the measurement position, or each pipes such as the bending pipe and the vertical pipe. The coefficient becomes a standard on the piping plan of Super Workable Concrete, but it is important to be used the value according to the pumping rate because the coefficient is not a constant value and often becomes a pumping rate function. And it was found that the exchange coefficient was related to the quality change of concrete on pumping.