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3 结论
（1）加入聚羧酸减水剂使得水泥浆体的电导率、pH 值在水化的早期和初期比空白样的低，这说明减水剂延缓了水泥的初期、早期水化。
（2）在水化早期，聚羧酸减水剂抑制了水化产物的晶形及结构的成长，尤其使C-S-H凝胶难以形成联接的空间网架，可使熟料矿物后期的水化更完整，产物晶体生长更充分，有利于水化产物的结构成长。
（3）掺入0.3%的减水剂的混凝土与空白样相比，3 d、7 d和28 d龄期抗压强度分别提高了50.9%、 40.4%和35%。减水剂的加入使水泥凝胶体向结晶体转变的过程延缓，有利于生成更大更完整的晶体，网络结构更为密实，提高混凝土的强度和密实性。
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