The greatest harm of commercial concrete is that Water/Cement is not well managed, as well as the concrete provided to clients is unqualified standard, causing quality dangers. Unstability of commercial concrete W/C:

( 1) The water material of sand and stone changes considerably;

( 2) sand and stone grading is bad, worldly natural build-up is too high, great as well as thick, can not ensure practical constant grading, the most lucky material automobile under the receptacle bin;

( 3) Pumping representative high quality. Especially in summer season, the pumping representative is a sort of compound admixture with hampering component. With the flow level of the pumping agent, the retarding component will certainly be brought right into concrete, and repeated as well as duplicated. After blending, the material is not blended uniformly, causing partial partition and partial extension of solidification time. Blending terminal experimental personnel, must have a solid sense of obligation, each car concrete out of the station, need to examine the pumping ability, do not meet the pumping problems of the product can not leave the terminal right into the pump truck.