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。
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-SASDMC 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.
作者
权娟娟
张凯峰
刘磊
张光华
傅少君
杨如东
陈健
QUAN Juanjuan;ZHANG Kaifeng;LIU Lei;ZHANG Guanghua;FU Shaojun;YANG Rudong;CHEN Jian(School of Civil Engineering,Xijing University,Xi'an 710123,China;Shaanxi Key Laboratory of Safety and Durability of Concrete Structures,Xi'an 710123,China;China West Construction North Co.Ltd.,Xi'an 710065,China;Shaanxi University of Science驭Technology,Xi'an 710021,China;Wuhan University,Wuhan 430072,China)
出处
《新型建筑材料》
北大核心
2020年第9期67-71,75,共6页
New Building Materials
基金
陕西省科协企业创新争先青年人才托举计划项目(20180406)
中建西部建设科技研发计划资助项目(ZJXJ-2017-08)。
关键词
低分子质量
两亲性
抑泥剂
合成
混凝土
low molecular weight
amphipathy
anti-clay agent
synthesis
concrete
作者简介
权娟娟,女,1980年生,硕士,副教授,从事绿色建材及高性能混凝土研究。E-mail:183776585@qq.com;通讯作者:刘磊,地址:西安市长安区西部大道阳光天地,E-mail:goufugui521@163.com。
