Cause analysis and preventive measures regarding raw material quality

1 Cause Analysis

Due to the decreasing resources of natural sand, the mud content of the sand has also been neglected. Large and small, sometimes even sand from the same sand field will have this phenomenon. When the mud content is large, more pumping agent needs to be added because the mud absorbs water-reducing components; when the mud content in the sand suddenly becomes small, if the amount of pumping agent is not reduced, the concrete mixture will segregate. , because the dosage has exceeded its saturation point.

2 Preventive measures

To maintain the stability of the mud content in the sand, when testing When it is found that there is a large difference in mud content in the sand (≥0.5%), it should be stored separately and should not be mixed and stored. </p