Toluene diisocyanate manufacturer Knowledge Effect of water reducing agent on concrete, etc.

Effect of water reducing agent on concrete, etc.

Effect of water reducing agent on concrete, etc.

1. Clotting time. High-efficiency water reducing agents generally have no retarding effect and may even promote the hydration and hardening of cement. Retarded high-efficiency water-reducing admixture is a compound of high-efficiency water-reducing agent and retardant. Under normal circumstances, commercial concrete mixing stations add a certain amount of retarder to the water reducing agent in order to delay cement hydration and reduce slump loss.

2. Air content. The currently commonly used polycarboxylate water-reducing agents have a certain air content, and the air content of concrete should not be too high, otherwise the strength of the concrete will be greatly reduced.

3. Water retention. High-efficiency water-reducing admixtures do not contribute much to reducing bleeding in concrete, and may even increase bleeding. Concrete bleeding increases when the dosage is excessive.


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