摘要
针对含泥量对水泥浆体的负面影响,以三甲胺(或三乙胺)与1, 3-二溴丙烷作为反应物,通过季铵化反应制备出短链双子季铵盐抗泥剂(三甲胺型标记为G-KN1,三乙胺型标记为G-KN2),将其与聚羧酸盐减水剂RS-1复配以增强水泥浆体的抗泥效果。抗泥剂G-KN1和G-KN2的分子结构采用FT-IR和1H NMR进行测定。抗泥剂和减水剂复配体系的抗泥效果通过测定水泥净浆流动度进行评价。同时,综合运用X射线衍射和总有机碳(TOC)表征手段,考察了抗泥剂和减水剂复配体系对水泥分散和吸附性能的影响。结果表明,当蒙脱土的含量为2%或3%时,G-KN1和G-KN2的加入均可明显提高水泥的净浆流动度,并能保持良好的稳定性,且G-KN2表现出更优异的抗泥性能。
To eliminate the negative influence of clay content on cement paste,gemini quaternary ammonium anti-clay agent with short bridging chains was fabricated via quaterisation reaction between trimethylamine(or triethylamine)and 1,3-dibromopropane(G-KN1 for trimethylamine and G-KN2 for triethylamine).This agent was compounded with polycarboxylate water reducing agent RS-1 to enhance the anti-clay properties of cement paste.The molecular structure of G-KN1 and G-KN2 was characterized by Fourier transform infrared spectroscopy and 1H nuclear magnetic resonance.The anti-clay properties of the compounded system was evaluated by the measurement of fluidity of cement paste.Also,the dispersion and adsorption properties of the compounded system were investigated by X-ray diffraction and total organic carbon analysis.G-KN1 and G-KN2 can improve the fluidity and G-KN2 can improve the fluidity and stability of cement paste when the content of montmorillonite is 2%or 3%.G-KN2 has a better anti-clay performance,compared to G-KN1.
作者
张光华
王爽
张策
崔鸿跃
ZHANG Guanghua;WANG Shuang;ZHANG Ce;CUI Hongyue(Shaanxi Key Laboratory of Chemical Additives for Industry,Shaanxi University of Science and Technology,Xi’an 710021,China;Shanxi Yuncheng Hongxiang Building Materials Co.,Ltd.,Yuncheng 044000,Shanxi,China;Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology,Shaanxi University of Science&Technology,Xi’an 710021,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2019年第2期178-183,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(31670596)
新型聚羧酸盐减水剂的研发(SHX20160305)
关键词
双子季铵盐
聚羧酸减水剂
抗泥剂
蒙脱土
抗泥性能
gemini quaternary ammonium salt
polycarboxylate
anti-clay agent
montmorillonite
anti-clay
