Abstract
This paper has been conducted to develop a novel system for pumping concrete with a minimizing degree of the pulsation in the pipe. A pumping devise designed on a small scale has two hydraulic cylinders: one for a main stream and the other for a supplemental stream, respectively. A visualization technique was employed to determine satisfactory levels of the pulsation of the supplemental stream that resulted in minimizing the pulsatile flow of concrete flowing through the main pipe after being combined with the supplemental stream.
This research concludes that pumping concrete could be operated most smoothly and without causing an adverse pulsation through the pipe by arranging the pulsation levels of the supplemental stream with the main flow of a certain level of the pulsation when the angle of confluent is 45-dgree. Also, it was found that there existed was the segregation of model concrete in confluent during pulsatile flow and that the volumetric ratio of coarse aggregate to mortar influenced the segregation of concrete.
