酯化改性抗泥型聚羧酸减水剂的制备及性能研究

材料导报

2020, Vol. 34

Issue (Z1): 596-600

高分子与聚合物基复合材料

酯化改性抗泥型聚羧酸减水剂的制备及性能研究

纪宪坤¹, 汪源¹, 汪苏平², 胡志豪²

1 武汉三源特种建材有限责任公司,430000;
2 武汉源锦建材科技有限公司,430000

Preparation and Application of Esterification Modified Anti-mud PolycarboxylicAcid Water Reducer

JI Xiankun¹, WANG Yuan¹, WANG Suping², HU Zhihao²

1 Wuhan Sanyuan Special Building Materials Co., Ltd., Wuhan 430000, China;
2 Wuhan Ujoin Building Material Technology Co., Ltd., Wuhan 430000, China

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摘要聚羧酸减水剂对骨料含泥量较为敏感,这大大降低了其使用性能和效果,严重影响混凝土的工作性能。通过分子结构设计,将丁二酸酐(MAD)与异戊烯醇聚氧乙烯醚(TPEG)进行酯化反应合成抗泥单体M,然后将其与4-羟丁基乙烯基聚氧乙烯醚(GPEG)、丙烯酰胺(AM)、丙烯酸(AA)等共聚合成具有长支链酯基结构的抗泥型聚羧酸减水剂KNV,并通过红外光谱和核磁共振氢谱对其分子结构进行表征。结果表明:以n(MAD)∶n(TPEG)=3∶1进行酯化反应制备的抗泥单体合成的酯化改性抗泥型聚羧酸减水剂KNV具有较好的分散和保持性能;与市售抗泥型聚羧酸减水剂M12相比,随着泥土含量的增加,KNV的抗泥效果比M12好;不同种类水泥中,加入2.0%掺量的钠基蒙脱土,KNV表现出良好的水泥适应性和抗泥性能;同种水泥中,加入2.0%掺量的不同种类泥土,KNV的抗泥效果以及对泥土种类的适应性均比M12优异;将KNV应用到混凝土中,同样具有优异的抗泥能力,可降低减水剂的掺量和改善混凝土的和易性,提高混凝土的抗压强度。

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	纪宪坤
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关键词: 聚羧酸减水剂酯化改性抗泥混凝土

Abstract: Polycarboxylic acid superplasticizer is sensitive to aggregate mud content, which greatly reduces its performance and effect, and seriously affects the working performance of concrete. A kind of anti-mud polycarboxylic acid water reducer was synthesized by molecular structure design, anti-mud monomer M was synthesized by esterification of succinic anhydride (MAD) with isopentenol polyoxyethylene ether (TPEG), then copolymerized with 4-hydroxybutyl vinyl polyoxyethylene ether (GPEG), acrylamide (AM) and acrylic acid (AA) to form anti-mud polycarboxylic acid water reducer KNV with long branched ester group structure. The results show that the esterification modified anti-mud polycarboxylic acid water reducer KNV prepared by esterification of anti-mud monomer with n(MAD)∶n(TPEG)=3∶1 has good dispersion and retention properties. Compared with the commercially available anti-mud polycarboxylic acid water reducer M12, with the increase of soil content, the anti-mud effect of KNV is better than that of M12. The addition of 2. 0% sodium bentonite to different type of cement shows good cement adaptability and mud resistance.When the same kind of cement was added with 2.0% different kinds of soil, the anti-mud effect and adaptability of KNV to different kinds of soil were better than those of M12. The application of KNV to concrete also has excellent mud resistance, which can reduce the amount of water reducer, improve the workability of concrete and increase the compressive strength of concrete.

Key words: polycarboxylic acid water reducer esterified modification anti-mud concrete

发布日期: 2020-07-01

ZTFLH:

TU53

作者简介: 纪宪坤,硕士,高级工程师,毕业于重庆大学材料科学与工程专业,中国土木工程学会混凝土质量专业委员会专家委员,中国工程建设标准化协会建筑防水与防护委员会专家委员,武汉源锦建材科技工程技术部长。研究领域为混凝土工程技术、裂缝控制技术、混凝土耐久性及测试技术、尾矿资源化利用技术等。获得华夏建设科学技术一等奖1项,二等奖2项,广东省土木建筑学会二等奖1项,完成专著1部(合著),发表学术论文40余篇。参与多项“十二五”、“十一五”国家科技支撑计划课题,参编《普通混凝土长期性能和耐久性能试验方法标准》(GB/T50082-2009)《混凝土耐久性检验评定标准》(JGJ/T 193-2009)《普通混凝土配合比设计规程》(JGJ 55-2011)《混凝土质量控制标准》(GB 50164-2011)《混凝土用氧化镁膨胀剂》(CBMF19-2017)《混凝土用氧化镁应用技术规程》等国家标准。

引用本文:

纪宪坤, 汪源, 汪苏平, 胡志豪. 酯化改性抗泥型聚羧酸减水剂的制备及性能研究[J]. 材料导报, 2020, 34(Z1): 596-600.
JI Xiankun, WANG Yuan, WANG Suping, HU Zhihao. Preparation and Application of Esterification Modified Anti-mud PolycarboxylicAcid Water Reducer. Materials Reports, 2020, 34(Z1): 596-600.

链接本文:

http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2020/V34/IZ1/596

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