中文摘要：

通过自由基聚合的方法合成了相同阳离子含量、侧链密度，侧链聚合度为22—176的一系列醚型两性聚羧酸系减水剂（Amphoteric Polycarboxylate Superplasticizers，APC），以及侧链聚合度为112的酯键桥接APC。通过测试不同APC在水泥浆体中的吸附特性。及其对水泥浆体Zeta电位、流动度、早期强度、水化放热速率等的影响规律，研究了APC侧链结构对水泥浆体早期性能的影响。结果表明：不同结构APC对水泥浆体Zeta电位的改变均较小。随着侧链长度的增加,APC在水泥浆体中的吸附量先增加后减小。酯型APC的吸附能力较醚型的差。侧链较长且具有酯键桥接基团的APC均能够促进水泥水化过程，从而提高硬化水泥浆体的早期强度。

英文摘要：

A series of ether type amphoteric polycarboxylate superplasticizer（APC） of the same cation content,side chain density with side chain polymerization degree of 22-176,and ester bond bridge APC with side chain polymerization degree of 112 was synthesized by free radical polymerization method. Through the test of different adsorption characteristics of APC in cement paste, and its effect rules on the cement paste fluidity,Zeta potential, early strength,hydration exothermic rate,studied the effects of APC side chain structure on the early performance of cement paste. The results showed that：the different structure of APC has small influence on the change of cement paste Zeta potential. With the increase of the length of the side chain, the adsorption amount of APC in cement paste increased first and then decreased. The adsorption capacity of ester type APC is poor than that of ether type. The APC with long side chain and with ester bond bridging groups can promote the hydration process of cement, so as to improve the early strength of hardened cement paste.