Six Tips to Prevent Concrete Pumping Blockage

When installing and designing pipelines, avoid 90° bends and S-curves as much as possible to reduce resistance during concrete pumping and prevent blockage.

To ensure continuous concrete pumping and reliable pouring quality, the interval between operations should not be too long to avoid blockage. If the interval is prolonged for some reason, start the pump or run it forward and backward several times every 5 to 10 minutes to prevent clogging.

The mix ratio of pumped concrete shall be strictly designed in accordance with relevant specifications, and the slump shall be precisely controlled.

The particle size of selected aggregates must meet requirements; generally, it should not exceed 1/4 of the pipeline inner diameter.

Before pumping concrete, lubricate the pipeline with clean water, deliver mortar first, and then pump concrete to prevent blockage.

In hot summer days, cover pipelines with wet straw bags to prevent pipe blockage caused by excessive slump loss of concrete during pumping.