抗泥型聚羧酸减水剂的研究(Ⅰ)——普通型  

Research status of anti-mud polycarboxylate superplasticizer(Ⅰ)--coventional type

作　　者：李悦[1] 赵冰垠 黄舟 吴玉生 金彩云[2] 蔡博群 LI Yue;ZHAO Bingyin;HUANG Zhou;WU Yusheng;JIN Caiyun;CAI Boqun(The Key Laboratory of Urban Security and Disaster Engineering,MOE,Beijing University of Technology,Beijing 100124,China;College of Applied Sciences,Beijing University of Technology,Beijing 100124,China;China Building Materials Inspection and Certification Group Xiamen Hongye Company,Xiamen 361026,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]北京工业大学应用数理学院,北京100124 [3]中国建材检验认证集团厦门宏业有限公司,福建厦门361026

出　　处：《混凝土》2021年第3期62-65,共4页Concrete

基　　金：“十三五”国家重点研发计划项目“高抗裂预拌混凝土关键材料及制备技术”(2017YFB0310100);国家自然科学基金项目“基于遗传算法的泵送高强抗裂混凝土优化设计及其流动性数值分析”(51808015)。

摘　　要：利用甲基烯丙基聚氧乙烯醚(HPEG)、丙烯酸(AA)、磷酸类功能性单体(PFM)和β-环糊精马来酸单酯(β-CD-MAH),以过硫酸铵(APS)为氧化剂,化合物C为还原剂,通过自由基共聚反应合成了抗泥型聚羧酸减水剂。研究了掺该减水剂的水泥净浆和混凝土的性能,并采用凝胶渗透色谱(GPC)、X射线衍射(XRD)和总有机碳分析测试(TOC)对减水剂的抗泥机理进行了研究。结果表明,经PFM和β-CD-MAH改性后的减水剂具有明显的抗泥保坍效果,并能有效改善含泥混凝土的工作性和长期性能。With ammonium persulfate(APS)as oxidant and compound C as reductant,anti-mud polycarboxylic superplasticizer was synthesized by free radical copolymerization of methyl allyl polyoxyethylene ether(HPEG),acrylic acid(AA),phosphoric acid functional monomer(PFM)andβ-cyclodextrin maleic acid monoester(β-CD-MAH).The properties of cement paste and concrete mixed with the polycarboxylate superplasticizer studied.The anti-mud mechanism of the polycarboxylate superplasticizer was studied by gel permeation chromatography(GPC),X-ray diffraction(XRD)and total organic carbon(TOC).The results show that compared with the unmodified polycarboxylate superplasticizer without phosphate functional monomer(PFM)andβ-cyclodextrin maleic acid monoester(β-CD-MAH).The modified polycarboxylate superplasticizer has obvious anti-mud effect and can effectively improve the workability and long-term performance of the mud-containing concrete slurry.

关 键 词：β-环糊精马来酸单酯 磷酸类功能性单体 抗泥 机理 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]