保坍型聚羧酸减水剂的合成及其性能研究
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摘要
以丙烯酸,异丁烯基聚氧乙烯醚(HPEG)与丙烯酸羟乙基酯/丙烯酸乙酯为主要反应原料,合成羟乙酯/乙酯结构保坍型聚羧酸减水剂。通过凝胶渗透色谱仪(GPC)、表面张力、Zeta电位及混凝土应用性能表征,测定了减水剂产物的分子量和转化率及其综合性能,并在此基础上分析了羟基酯/烷基酯结构减水剂与水泥颗粒表面吸附分散作用机理。结果表明:羟基酯结构减水剂的混凝土分散性能及保持能力更优,且羟乙酯结构的引入有利于提高其应用性能。
引文
[1]刘春燕,王自为,任建国,等.新型保坍型聚羧酸减水剂的合成及性能研究[J].山西大学学报:自然科学版,2012,35(1):113-117.
[2]王子明.聚羧酸减水剂——制备、性能与应用[M].北京:中国建筑工业出版社,2009.
[3]刘尊明,逢鲁峰.聚羧酸高性能减水剂与缓凝剂的复配研究[J].混凝土,2009(12):52-53.
[4]罗永会,金树新,杨惠生.控制坍落度损失的缓凝剂优选研究[J].混凝土,2000(6);30-31
[5]杨晓峰,王虎群,熊卫峰,等.缓释型聚羧酸减水剂的制备与性能研究[J].新型建筑材料,2013(3):32-33.
[6]陈新秀.聚羧酸系高性能减水剂的研究进展与展望[J].福建建材,2012(1):19-22.
[7]Uchikawa H,Sawaki D,Hanegara S.Influence of kind and added timing of organic admixture on the composition,structure and property of fresh cement paste[J].Cem Conor Res,1995,25(2):353-364.
[8]Yin S,Aishah F,Salmiah A.Adsorptive behavior of surfactants on surface of Portland cement[J].Cem Concr Res,2001,31(7):1009-1015.
[9]Grabiec A M,Krzwob,Ocka-Laurow R.Influence of melamine superplasticizer on some characteristics of concrete[C]//10th International Congress on the Chemistry of Cement,Goteborg,Sweden,1997:6-14.
[10]Sakai E,Kang J K,Daimon M.Action mechanisms of comb-type superplasticizers containing grafted polyethylene oxide chains[C]//6~(th)CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete,Nice,France,2000:75-86.
[11]Yoshioka K,Sakai E,Daimon M.Role of Steric Hindrance in the Performance of Superplasticizer for Concrete[J].J Am Ceram Soc,1997,80(10):2667-2671.
[12]Yamada K,Hamejaxa S.Working mechanism of polycarboxylate superplasticizer considering the chemical structure and cement characteristics[C]//Proceedings of the 11th International Congress on the Chemistry of Cement,Durban,South Africa,2003:538-549.
[13]Kin B G,Jiang S P,Jolicoeur C,et al.The adsorption behavior of PNS superplasticizer and its relation to fluidity of cement paste[J].Cem Concr Res,2000,30(6):887-893.
[2]王子明.聚羧酸减水剂——制备、性能与应用[M].北京:中国建筑工业出版社,2009.
[3]刘尊明,逢鲁峰.聚羧酸高性能减水剂与缓凝剂的复配研究[J].混凝土,2009(12):52-53.
[4]罗永会,金树新,杨惠生.控制坍落度损失的缓凝剂优选研究[J].混凝土,2000(6);30-31
[5]杨晓峰,王虎群,熊卫峰,等.缓释型聚羧酸减水剂的制备与性能研究[J].新型建筑材料,2013(3):32-33.
[6]陈新秀.聚羧酸系高性能减水剂的研究进展与展望[J].福建建材,2012(1):19-22.
[7]Uchikawa H,Sawaki D,Hanegara S.Influence of kind and added timing of organic admixture on the composition,structure and property of fresh cement paste[J].Cem Conor Res,1995,25(2):353-364.
[8]Yin S,Aishah F,Salmiah A.Adsorptive behavior of surfactants on surface of Portland cement[J].Cem Concr Res,2001,31(7):1009-1015.
[9]Grabiec A M,Krzwob,Ocka-Laurow R.Influence of melamine superplasticizer on some characteristics of concrete[C]//10th International Congress on the Chemistry of Cement,Goteborg,Sweden,1997:6-14.
[10]Sakai E,Kang J K,Daimon M.Action mechanisms of comb-type superplasticizers containing grafted polyethylene oxide chains[C]//6~(th)CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete,Nice,France,2000:75-86.
[11]Yoshioka K,Sakai E,Daimon M.Role of Steric Hindrance in the Performance of Superplasticizer for Concrete[J].J Am Ceram Soc,1997,80(10):2667-2671.
[12]Yamada K,Hamejaxa S.Working mechanism of polycarboxylate superplasticizer considering the chemical structure and cement characteristics[C]//Proceedings of the 11th International Congress on the Chemistry of Cement,Durban,South Africa,2003:538-549.
[13]Kin B G,Jiang S P,Jolicoeur C,et al.The adsorption behavior of PNS superplasticizer and its relation to fluidity of cement paste[J].Cem Concr Res,2000,30(6):887-893.
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