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固废基胶凝材料专用聚羧酸减水剂的制备及性能研究
作者：岳光亮1，谢瑞兴1，郭文倩2，彭立刚2，唐樱燕2，于彭2，莫立武3
（1.山东众森新材料有限公司，山东 济南 250000；2.山东众森科技股份有限公司，山东 济南 250000；
3.南京工业大学 材料科学与工程学院，材料化学工程重点实验室，江苏 南京 210000）
摘要：针对固废基胶凝材料需水量高、包裹性差导致固废基混凝土坍落度损失大的问题，采用功能型大单体乙二醇单乙烯基聚乙二醇醚（EPEG）与丙烯酸（AA）、丙烯酸羟丙酯（HPA）在常温（10~25 ℃）下聚合反应，制得固废基胶凝材料专用聚羧酸减水剂PCA-Ⅱ，并对其分子结构和分子质量进行了红外光谱和凝胶色谱分析。试验结果表明，其最佳工艺参数为：酸醚比2.2、酯醚比2.6、次磷酸钠与大单体的摩尔比为0.4。经固废基混凝土试配验证表明，掺该减水剂混凝土的和易性与保坍性良好，浆体饱满，同时对固废基混凝土的水化产物进行SEM测试，分析了PCA-Ⅱ对固废混凝土的作用原理。
关键词：聚羧酸减水剂；固废基胶凝材料；表征；和易性
中图分类号：TU528.042+.2 文献标识码：A 文章编号：1001-702X（2022）06-0120-04
Preparation and performance test of polycarboxylic acid water reducer dedicated for solid waste cementitious materials
YUE Guangliang1，XIE Ruixing1，GUO Wenqian2，PENG Ligang2，TANG Yingyan2，YU Peng2，MO Liwu3
（1.Shandong Zhongsen New Material Co. Ltd.，Jinan 250000，China；2.Shandong Zhongsen Technology Co. Ltd.，Jinan 250000，China；
3.College of Materials Science and Engineering，Nanjing Key Laboratory of Materials Chemical Engineering，Nanjing University of Technology，Nanjing 210000，China）
Abstract：Aiming at the high slump loss of solid waste concret caused by high water demand and poor encapsulation of solid waste based cementitious materials，polycarboxylic acid water reducer PCA-Ⅱ dedicated for solid waste based cementitious materials was prepared by polymerization of functional monomer ethylene glycol monoethyl vinyl polyethylene glycol ether（EPEG）， acrylic acid（AA） and hydroxypropyl acrylate（HPA） at room temperature（10~25 ℃）. The molecular structure and molecular weight were analyzed by IR and gel chromatography. The results showed that the optimum process parameters were as follows：acid ether ratio 2.2，ester ether ratio 2.6，and the molar ratio of sodium hypophosphite to macromonomer 0.4. The test results of solid waste concrete show that the concrete with this water reducer has good workability and slump resistance，and the slurry is full. At the same time，the hydration products of solid waste based concrete were tested by SEM，and the action principle of PCA-Ⅱ on solid waste concrete is analyzed.
Key words：polycarboxylate superplasticizer，solid waste cementitious materials，characterization，workability