Reason pumping concrete slump and slump loss instability

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  • Slump Loss When Pumping? - Concrete Engineering general ...

    Nov 23 2001 · The most common reason for slump loss from pumping is that the aggregates were not in a saturated surface dry (SSD) condition when the concrete was batched. This results from lack of attention to the stockpile moisture as noted in ishvaaag's comments. Most coarse aggregates can absorb between about 1-1/2 and 5 percent moisture by weight.

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