As a concrete batch plant staff, do you clearly know about its feeding order? Take a look at it.

In the concrete batch plant mixing feed, usually will be used to put the stone first, then cement, and then followed by sand and water, why is this feeding? The main purpose is to ensure that stones, cement and other mixing evenly, to prevent cement with other coarse aggregate Wrapped together into the cement mixer, with water quickly after the formation of small cement aggregates, the smaller the water-cement ratio, the more serious this agglomeration.

Another reason is: small cement agglomerates attached to the coarse aggregate, the larger the coarse aggregate size, the smaller the cement agglomeration. And in the mixing process, due to the role of friction and impact, in the direction of the aggregate movement of small cement particles are effectively protected, the particle size is greater than the small cement aggregates several times or ten times the coarse aggregate into small cement aggregates of the protection of the barrier, so that part of the cement particles can not be broken after the end of mixing, to be hardened after the cement block filled with aggregate gap, resulting in reduced concrete strength, and even cause quality accidents.