In addition, the surface state of the aggregate also has a certain influence on pumpability.
The smoother the surface of the aggregate, the smaller the relative friction between the aggregate particles, and under a certain slurry, the pumpability is better.
The water absorption rate of aggregates also has a certain impact on the pumpability of the mixture.
Unsaturated water absorbing aggregates under pressure conditions will cause water to migrate to the internal pores of the aggregates, resulting in a decrease in the fluidity of concrete.
Therefore, aggregates with higher water absorption rates should be treated with moisture during construction.
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