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本研究选用甲基烯丙基聚氧乙烯醚(TPEG)和丙烯酸(AA)为单体,通过调节酸醚比和大单体分子量,合成不同接枝密度和侧链长度的聚羧酸减水剂(PC)。通过对上述样品做净浆流动度试验和掺加3%蒙脱土后浆体流动度试验可知:掺加蒙脱土比未掺加蒙脱土流动度降低,且流动度随着酸醚比和大单体分子量的提高均呈现先增大后减小的趋势。在使用减水剂的前提下,掺加蒙脱土后,混凝土各项性能均有所下降。
In this study, poly (meth) allyl polyoxyethylene ether (TPEG) and acrylic acid (AA) were used as monomers to synthesize polycarboxylic acid with different graft densities and side chain lengths by adjusting the ratio of ether to ether and the molecular weight of macromonomer Agent (PC). Through the fluidity test of the paste and the slurry fluidity test after the addition of 3% montmorillonite, the fluidity of montmorillonite-doped montmorillonite is lower than that of non-montmorillonite-modified montmorillonite, And the increase of the molecular weight of the macromonomer all showed the tendency of increasing firstly and then decreasing. In the use of water-reducing agent under the premise of adding montmorillonite, the concrete properties have declined.