The result shows that the polycarboxylate superplasticizer has excellent retarding effect and defers the hydration process, but has no effect on the later hydration process.

• 结果表明：聚羧酸减水剂在具有较好分散性的同时具有较强的缓凝作用，有效抑制初期水化，而不影响后期水化。