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新型聚羧酸高性能纳米籽晶早强减水复合剂的制备及性能研究
作者：王丽秀，范瑞波，徐忠洲，朱佳宁，高文富
（山西佳维新材料股份有限公司，山西 运城 044000）
摘要：研发了一种新型聚羧酸高性能纳米籽晶早强减水复合剂（NZ-01），其制备工艺简单，所得溶液状态均匀稳定无沉淀。其最佳工艺参数为：常温条件下，底料中的早强型聚羧酸减水剂（ZQPC-01）酸醚比为4，稳定剂中超长侧链梳形聚羧酸早强减水剂（ZQPC-S5）的酸醚比为2，分散剂聚乙二醇用量为硝酸钙质量的1.5%，滴加时间2 h，滴加完成后高速剪切5 min。混凝土应用试验结果表明，掺加NZ-01能促进生成更多的C-S-H凝胶，加快水泥水化进程，显著提高混凝土的早期强度，后期强度无倒缩，不影响混凝土的耐久性。
关键词：纳米籽晶早强减水复合剂；合成；早期强度；稳定性
中图分类号：TU528.042+.2 文献标识码：A 文章编号：1001-702X（2019）12-0066-03
Preparation and properties of a novel polycarboxylate high performance nano-seed crystal early strength water reducing composite
WANG Lixiu，FAN Ruibo，XU Zhongzhou，ZHU Jianing，GAO Wenfu
（Shanxi Jiawei New Materials Co. Ltd.，Yuncheng 044000，China）
Abstract：This paper developed a new type of polycarboxylate high-performance nano-seed early-water-reducing composite（NZ-01），which has a simple preparation process and uniform and stable precipitation. Optimum process parameters：under normal temperature conditions，the early-strength polycarboxylate water reducer（ZQPC-01） has a ratio of acid to ether of 4，and the ultra-
-long side chain comb-shaped polycarboxylic acid early strength water reducer in the stabilizer（ZQPC-S5） acid ether ratio is 2，
dispersing agent（polyethylene glycol） is 1.5%（according to the mass of calcium nitrate），and added dropwise for 2 hours. After the
completion of the dropwise addition，it is sheared by a high speed shear for 5 min. Concrete performance test results show that the addition of NZ-01 can promote the formation of more C-S-H gel，accelerate the cement hydration process，significantly improve the early strength of concrete，while the late strength does not shrink，does not affect durability of concrete.
Key words：nano-seed crystal early-strength water reducing composite，synthesis，early strength，stability