Controlling Air Content in Concrete That Is Being Pumped, A Synthesis Study

摘要

Changes in the intentionally entrained air content of fresh concrete can occur at211u001ea number of places in the pumping process. These locations include as the 211u001econcrete is initially being loaded into the pump hopper, as it passes through the 211u001epump line, and when it exits the line. This synthesis reviews the findings of 211u001erecent research studies which deal with air content change in pumped concrete and 211u001esummarizes methods of reducing entrained air loss caused by handling.