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《材料导报》期刊社  2018, Vol. 32 Issue (14): 2384-2389    https://doi.org/10.11896/j.issn.1005-023X.2018.14.011
  无机非金属及其复合材料 |
硫铝酸盐水泥用抗泥型聚羧酸减水剂的制备及性能
白静静1, 李海艳2, 史才军1,2, 管学茂2, 向顺成1
1 湖南大学土木工程学院,长沙 410082;
2 河南理工大学材料科学与工程学院,焦作 454000
Preparation and Properties of Anti-clay Type Polycarboxylate Superplasticizer for Sulphoaluminate Cement
BAI Jingjing1, LI Haiyan2, SHI Caijun1,2, GUAN Xuemao2, XIANG Shuncheng1
1 College of Civil Engineering, Hunan University, Changsha 410082;
2 School of Material Science and Engineering, Henan Polytechnic University, Jiaozuo 454000
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摘要 以过硫酸铵(APS)为引发剂,丙烯酸(AA)、肉桂酸(CINN)、异戊烯醇聚氧乙烯醚(TPEG)、2-丙烯酰胺-2-甲基丙烷磺酸(AMPS)为反应单体,通过自由基共聚反应合成了一种新型的硫铝酸盐水泥用抗泥型聚羧酸减水剂(CPC)。通过单因素变量法,分别研究了CINN用量、引发剂用量、酸醚比和反应温度对CPC性能的影响。研究结果表明,当引发剂用量为TPEG质量的0.25%,n(TPEG)∶n(AA)∶n(AMPS)∶n(CINN)=1∶5∶0.3∶0.25,反应温度为85 ℃时CPC的性能最佳。在膨润土掺量为水泥质量的5%(下同),CPC用量为0.75%,水灰比为0.29时,硫铝酸盐水泥初始净浆流动度达到261 mm,2 h后净浆流动度为235.5 mm。红外分析结果表明,CPC的分子结构中含有羧基、羟基、苯环等基团,符合预期的结构组成;总有机碳测试结果表明,膨润土对CPC的吸附量较少而对硫铝酸盐水泥用普通聚羧酸减水剂的吸附量较多;Zeta电位测试结果表明,CPC分子主要通过空间位阻作用对水泥颗粒进行分散。
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白静静
李海艳
史才军
管学茂
向顺成
关键词:  聚羧酸减水剂  吸附  膨润土    
Abstract: A novel anti-clay type polycarboxylate superplasticizer for sulphoaluminate cement (CPC) was synthesized via free radical copolymerization using the ammonium persulfate (APS) as initiator, and acrylic acid (AA) and cinnamic acid (CINN), isoamyl alcohol polyoxyethylene ether (TPEG),2-acrylamido-2-methyl propane sulfonic acid (AMPS) as monomers. By single factor variable method, the effects of CINN dosage, initiator dosage, acid ether ratio and reaction temperature on the performance of CPC were studied. The results showed that when the initiator dosage was 0.25% of TPEG mass, n(TPEG)∶n(AA)∶n(AMPS)∶n(CINN)=1∶5∶0.3∶0.25 and the reaction temperature was 85 ℃, the performance of CPC was the best. When the dosage of bento-nite was 5% of cement mass and the dosage of CPC was 0.75%, the initial fluidity of cement paste can attain as high as 261 mm, and the fluidity of cement paste still reached 235.5 mm two hours later. Infrared detection showed there were many functional groups such as carboxyl groups, hydroxyl groups and benzene groups in CPC, which were consistent with the expected structure composition. Total organic carbon test results showed that the clay absorbed CPC less than common superplasticizer for sulphoaluminate cement. ζ-potential test analysis results showed that polycarboxylate superplasticizer dispersed cement particles mainly by steric hindrance effect.
Key words:  polycarboxylate superplasticizer    adsorbtion    bentonite
               出版日期:  2018-07-25      发布日期:  2018-07-31
ZTFLH:  TU528.042  
基金资助: 国家自然科学基金(51272068;U1305243)
通讯作者:  史才军,男,1963年生,博士,教授,主要从事土木工程材料方面的研究 E-mail:cshi@hnu.edu.cn   
作者简介:  白静静:女,1993年生,硕士研究生,研究方向为聚羧酸减水剂的合成与性能 E-mail:851761053@qq.com
引用本文:    
白静静, 李海艳, 史才军, 管学茂, 向顺成. 硫铝酸盐水泥用抗泥型聚羧酸减水剂的制备及性能[J]. 《材料导报》期刊社, 2018, 32(14): 2384-2389.
BAI Jingjing, LI Haiyan, SHI Caijun, GUAN Xuemao, XIANG Shuncheng. Preparation and Properties of Anti-clay Type Polycarboxylate Superplasticizer for Sulphoaluminate Cement. Materials Reports, 2018, 32(14): 2384-2389.
链接本文:  
http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2018.14.011  或          http://www.mater-rep.com/CN/Y2018/V32/I14/2384
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