摘要
通过研究不同因素合成的PCE对超低水胶比水泥体系分散性能的影响,确定超高减水型PCE CJ-1的最优合成工艺,对该PCE进行GPC、表面张力和吸附量测试,并研究了该PCE在UHPC中的应用性能。结果表明,酸醚比为5.0,MAEG和ME用量分别为单体总质量的6.0%、0.5%,A、B液滴加时间分别为180、200 min条件下合成的CJ-1具有合理的分子质量分布和较低的表面张力,在水泥颗粒表面的吸附量更多,减水率达到44%。掺CJ-1的UHPC具有优异的流动性和较短的T500时间,且不影响强度发展。
The influence of different factors on the dispersion of ultra-low water-binder ratio cement system was studied,and the optimal synthesis process of ultra-high water-reducing PCE CJ-1 was determined.The PCE was tested and characterized by GPC,surface tension and adsorption capacity,and its application performance in UHPC was also studied.The results showed that CJ-1 synthesized under the conditions of ether ratio of 5.0,MAEG and ME dosage of 6%and 0.5%of the total mass of monomer,dropping time of A and B of 180 min and 200 min,respectively,had reasonable molecular weight distribution and low surface tension,and had more adsorption capacity on the surface of cement particles,with a water reduction rate of 44%.UHPC concrete mixed with CJ-1 has excellent fluidity and short T500 time,and does not affect the strength development.
作者
陈玉超
潘杰
刘明涛
张俊杰
CHEN Yuchao;PAN Jie;LIU Mingtao;ZHANG Junjie(Yunnan Construction and Investment Polymer Material Co.Ltd.,Kunming 650000,China;Yunnan Construction Investment Qujing Building Materials Co.Ltd.,Qujing 655500,China)
出处
《新型建筑材料》
2023年第3期127-130,共4页
New Building Materials
