In traditional understanding, after concrete is discharged from the machine, factors such as cement hydration process, aggregate water absorption, and water evaporation result in a gradual decrease in fluidity.
However, the frequent occurrence of the “slow-release” phenomenon in industry practice – that is, the normal flowability of concrete after being discharged from the machine increases abnormally after a period of time, even accompanied by problems such as bleeding, segregation, and stone leakage – not only subverts the traditional law of flowability changes, but also brings multiple hidden dangers to engineering quality, becoming a technical problem that troubles pre mixed concrete production enterprises and construction units.
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