| 摘要 |
PROBLEM TO BE SOLVED: To easily determine whether a selected concrete pump can force feed concrete in high precision for a long-distance. SOLUTION: This determining method for force feeding concrete comprises comparing of the sum of the pressure load of a concrete force-feed pipe determined from the internal pressure loss and horizontally converted distance in a force feed by the concrete force-feed pipe and the pressure load determined considering the height difference between the starting and end point positions of the concrete force-feed pipe, with the force-feeding load of the selected concrete pump, and determining that the pump force feed is possible when the sum of pressure loads exceeds the force-feeding load. To the slump value used for determining the internal pressure loss, a nozzle slump value determined by multiplying a slump reduction coefficient determined from temperature and time conditions, the effect by a chemical agent used, and the pressure bleeding test result by a slump value in mixing is applied.
|
