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两性共聚物AA-SAS-DMC混凝土抑泥剂的制备与性能

作者：权娟娟1，2，张凯峰3，刘磊3，张光华4，傅少君1，2，5，杨如东1，2，陈健1，2

关键字：两性,共聚物,AA-SAS-DMC,混凝土,抑泥剂,的,制备

　
（1.西京学院 土木工程学院，陕西 西安  710123；
2.陕西省混凝土结构安全与耐久性重点实验室，陕西 西安  710123；
3.中建西部建设北方有限公司，陕西 西安  710065；4.陕西科技大学 陕西 西安  710021；
5.武汉大学，湖北 武汉  430072）
    摘要：以丙烯酸、烯丙基磺酸钠和甲基丙烯酰氧乙基三甲基氯化铵共聚制备了低分子质量两性共聚物混AA-SAS-DMC混凝土抑泥剂。通过FTIR、TGA、XRD及GPC对共聚物的结构、热力学性能和分子量进行了表征，并对其应用性能进行研究，对抑泥剂的作用机理进行分析。结果表明，共聚物抑泥剂通过竞争吸附和分散作用，降低黏土对混凝土带来的不良影响。当抑泥剂掺量为胶凝材料质量的0.09%时，混凝土出机、0.5 h、1 h坍落度和扩展度较未掺时分别增大了15、20 mm，25、130 mm，20、150 mm。
    关键词：低分子质量；两亲性；抑泥剂；合成；混凝土
    中图分类号：TU528.042        文献标识码：A        文章编号：1001-702X（2020）09-0067-05
 
Preparation and properties of amphoteric copolymer anti-clay agent AA-SAS-DMC for concrete
QUAN Juanjuan1，2，ZHANG Kaifeng3，LIU Lei3，ZHANG Guanghua4，FU Shaojun1，2，5，YANG Rudong1，2，CHEN Jian1，2
（1.School of Civil Engineering，Xijing University，Xi'an 710123，China；2.Shaanxi Key Laboratory of Safety and Durability of Concrete Structures，Xi'an 710123，China；3.China West Construction North Co. Ltd.，Xi'an 710065，China；
4.Shaanxi University of Science ＆ Technology，Xi'an 710021，China；5.Wuhan University，Wuhan 430072，China）
    Abstract：The low molecular weight and amphiphilic anti-clay agent，AA-SAS-DMC was synthesized by acrylic acid，sodium allylsulfonate and methacryloxyethyltrimethyl ammonium chloride. The structures，thermal stability and molecular weight of AA-SAS-DMC were characterized by Flourier transform infrared spectroscopy（FTIR），thermal gravity analysis（TGA） X-ray diffraction（XRD）and gel permeation chromatography（GPC）. The application performance of AA-SAS-DMC was researched and the action mechanism on the anti-clay agent were analyzed. The results showed that the negative effect on concrete was obvious reduced while adding AA-SAS-DMC by preferential adsorption and dispersion properties. When the copolymer content was 0.09% of the cementing material，the incipient concrete slump and fluidity were increased by 15 mm and 20 mm，the 0.5 h concrete slump and fluidity were improved by 25 mm and 130 mm，and the 1 h of these were advanced by 20 mm and 150 mm.
    Key words：low molecular weight，amphipathy，anti-clay agent，synthesis，concrete