concrete pipes precautions

(A) the installation and design of pipes, try to avoid 90. And the S-shaped bend.
Concrete batching plant use obvious pit pump tubing, pumping concrete in order to reduce the resistance, to prevent clogging. Should always check the pump tube, pump tube in one direction if a greater degree of wear and tear, and timely use of the tube switching position, if the thickness of thin tubing should be promptly replaced with new pipe to prevent the pump tube during operation off the hook, or the replacement of the pump tube longer as a result of plugging phenomenon.
(2) In order to ensure the continuity of operations of pumping concrete, concrete pouring to ensure the quality of jobs in the interval of time not too long, to prevent clogging.If for any reason a longer time interval, every 20 minutes or so should initiate a pump or reverse, forward pump several times, the circulation pump is necessary to prevent clogging.
(3) Concrete mixing plants concrete should meet the requirements, if necessary, to determine by trial and pump pumping concrete mix.
Should first determine the maximum size of coarse aggregate and conveying diameter ratio.
Pumping height of 50m or less, not more than 1:3 for gravel, pebbles for not more than 1:2.5; pumping height of 50 ~ 100m, it is desirable in the range of 1:3 to 1:4; pumping height at 100m above, should be between 1:4 to 1:5. Flakiness particle content of not more than 10%. 3.3.2 Different pumping height, the slump of the concrete pump according to one selection.