水性胶乳固化剂对水泥基弹性灌浆料性能的影响
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摘要
为了改善水泥基弹性灌浆材料在深水环境条件下的使用性能,研究了丙烯酸酯乳液和水性胶乳固化剂对水泥基弹性灌浆材料性能的影响,并对水泥基胶凝材料的配比进行优化。试验结果表明,在丙烯酸酯胶乳中加入水性胶乳固化剂并掺入灌浆料后,一部分丙烯酸酯与水性固化剂中的酰胺基在水泥水化形成的碱性条件下发生迈克尔加成反应和酰胺化反应生成聚丙烯酰胺系列化合物,提高了灌浆料水下不分散性,固结体水气强度比在90%以上;同时,水性胶乳固化剂促进了另一部分丙烯酸酯共聚胶乳固化成膜,弹性灌浆料与混凝土裂缝界面水下粘结抗折强度大于2.0 MPa,抗渗承载压强大于1.2 MPa。灌浆料中掺加适量橡胶细粉并优化配伍可有效降低固结体弹性模量,提高抗冲击韧性和弹性变形能力,灌浆料固结体体积稳定,无干缩开裂隐患。
In order to improve the performance of the elastic cement-based grouting materials in deep water environment, experimental studies of the effects of acrylate latex and waterborne latex curing agent on the performance of the elastic cement-based grouting materials are carried out in this research. And the mix promotion of the cement-based cementitious materials is optimized. The testing results show that after admixing waterborne latex curing agent into the grouting materials mixed with the acrylate latex, some acrylate can react with the amido of waterborne latex curing agent by Michael addition and amidation to form polyacrylamide compounds under alkaline conditions of cement hydration, which improves the non-dispersibility of grouting material under water, and the water-air strength ratio of the concretions is more than 90%. At the same time, other acrylate latex is accelerated to form film by waterborne latex curing agent. The interfacial flexural strength between the elastic grouting material and concrete crack interface is greater than 2.0 MPa, and the bearing permeability pressure is greater than 1.2 MPa. Admixing a defined amount of rubber powder into the grouting material can effectively reduce elasticity modulus, improve impact toughness and elastic deformation capacity. The concretion of grouting material has the characteristics of volume stability with no dry shrinkage cracking.
In order to improve the performance of the elastic cement-based grouting materials in deep water environment, experimental studies of the effects of acrylate latex and waterborne latex curing agent on the performance of the elastic cement-based grouting materials are carried out in this research. And the mix promotion of the cement-based cementitious materials is optimized. The testing results show that after admixing waterborne latex curing agent into the grouting materials mixed with the acrylate latex, some acrylate can react with the amido of waterborne latex curing agent by Michael addition and amidation to form polyacrylamide compounds under alkaline conditions of cement hydration, which improves the non-dispersibility of grouting material under water, and the water-air strength ratio of the concretions is more than 90%. At the same time, other acrylate latex is accelerated to form film by waterborne latex curing agent. The interfacial flexural strength between the elastic grouting material and concrete crack interface is greater than 2.0 MPa, and the bearing permeability pressure is greater than 1.2 MPa. Admixing a defined amount of rubber powder into the grouting material can effectively reduce elasticity modulus, improve impact toughness and elastic deformation capacity. The concretion of grouting material has the characteristics of volume stability with no dry shrinkage cracking.
引文
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[7] 许彦明,蒙海宁,左李萍,等.水泥基微膨胀灌浆材料性能研究[J].粉煤灰,2016(2):43- 46.(XU Yanming,MENG Haining,ZUO Liping,et al.Study of the properties of cement-based micro expansion grouting material[J].Coal Ash,2016(2):43- 46.(in Chinese))
[8] 李国忠,张水.聚合物水泥基灌浆材料的性能研究[J].建筑材料学报,2010,13(6):744-748.(LI Guozhong,ZHANG Shui.Study on the property of polymer cement-based grouting material[J].Journal of Building Materials,2010,13(6):744-748.(in Chinese))
[9] 韦华,陈迅捷,张燕迟,等.橡胶粉掺量、粒径对砂浆性能影响规律研究[J].混凝土,2012(1):103- 105.(WEI Hua,CHEN Xunjie,ZHANG Yanchi,et al.Rubber powder content and particle size affect on the law of mortar performance[J].Concrete,2012(1):103- 105.(in Chinese))
[10] 韦华,陈迅捷,魏治文,等.橡胶粉掺量与粒径对砂浆耐久性和抗裂性的影响[J].混凝土,2015(10):131- 134.(WEI Hua,CHEN Xunjie,WEI Zhiwen,et al.Effect of content and particle size of rubber powder on durability and crack resistance of cement mortar[J].Concrete,2015(10):131- 134.(in Chinese))
[11] JTJ 270—1998 水运工程混凝土试验规程[S].(JTJ 270—1998 Testing code of concrete for port and waterway engineering[S].(in Chinese))
[12] 管信辉.(甲基)丙烯酸甲酯与胺的酰胺化反应研究[D].青岛:青岛科技大学,2013.(GUAN Xinhui.Studies on amidation reaction of methyl(meth) acrylate and amines[D].Qingdao:Qingdao University of Science and Technology,2013.(in Chinese))
[13] DL/T 5150—2001 水工混凝土试验规程[S].(DL/T 5150—2001 Test code for hydraulic concrete[S].(in Chinese))
[14] 梁乃兴.聚合物改性水泥混凝土[M].北京:人民交通出版社,1995:46- 48.(LIANG Naixing.Polymer modified cement concrete[M].Beijing:China Communications Press,1995:46- 48.(in Chinese))
[15] 朱建辉,田宇宏.聚合物改性超细水泥灌浆材料性能研究[J].西安建筑科技大学学报(自然科学版),2008,40(6):759-763.(ZHU Jianhui,TIAN Yuhong.Modification of grout of superfine cement by polymer emulsion[J].Journal of Xi’an University of Architecture and Technology (Natural Science Edition),2008,40(6):759-763.(in Chinese))
[16] 高鑫,黄剑,熊建波.聚合物改性水下修补灌浆料的性能研究[J].新型建筑材料,2017,44(6):90- 94.(GAO Xin,HUANG Jian,XIONG Jianbo.Research on properties of polymer modified grouting material for underwater repair[J].New Building Materials,2017,44(6):90- 94.(in Chinese))
[2] 曹海,刘涛,夏世法.混凝土坝体裂缝化学灌浆处理及效果分析[J].水力发电,2010,36(5):44- 46.(CAO Hai,LIU Tao,XIA Shifa.Processing and analysis of chemical grouting for crack of concrete dam[J].Water Power,2010,36(5):44- 46.(in Chinese))
[3] 胡玉初,费玉琴.高强度微膨胀无机灌浆材料的研究和应用[J].混凝土及加筋混凝土,1989(2):55- 60.(HU Yuchu,FEI Yuqin.Research and application of inorganic grouting material with high strength and micro expansion[J].Concrete and Reinforced Concrete,1989(2):55- 60.(in Chinese))
[4] 方乔,高莎莎,方晓填.无机灌浆材料应用技术研究[J].广东建材,2016(6):18- 20.(FANG Qiao,GAO Shasha,FANG Xiaotian.Inorganic grouting material application technology[J].Guangdong Building Materials,2016(6):18- 20.(in Chinese))
[5] 杜纪锋,叶正茂,芦令超,等.高性能水泥基灌浆料试验研究[J].济南大学学报(自然科学版),2008,22(1):11- 14.(DU Jifeng,YE Zhengmao,LU Lingchao,et al.Experiment on high-performance cement-based grouts[J].Journal of University of Jinan (Science and Technology),2008,22(1):11- 14.(in Chinese))
[6] 吴芳,刘小兵.水泥基无收缩灌浆料试验研究[J].粉煤灰,2010(2):7- 10.(WU Fang,LIU Xiaobing.Experimental study of shrinkage-free cement-based grouting material[J].Coal Ash,2010(2):7- 10.(in Chinese))
[7] 许彦明,蒙海宁,左李萍,等.水泥基微膨胀灌浆材料性能研究[J].粉煤灰,2016(2):43- 46.(XU Yanming,MENG Haining,ZUO Liping,et al.Study of the properties of cement-based micro expansion grouting material[J].Coal Ash,2016(2):43- 46.(in Chinese))
[8] 李国忠,张水.聚合物水泥基灌浆材料的性能研究[J].建筑材料学报,2010,13(6):744-748.(LI Guozhong,ZHANG Shui.Study on the property of polymer cement-based grouting material[J].Journal of Building Materials,2010,13(6):744-748.(in Chinese))
[9] 韦华,陈迅捷,张燕迟,等.橡胶粉掺量、粒径对砂浆性能影响规律研究[J].混凝土,2012(1):103- 105.(WEI Hua,CHEN Xunjie,ZHANG Yanchi,et al.Rubber powder content and particle size affect on the law of mortar performance[J].Concrete,2012(1):103- 105.(in Chinese))
[10] 韦华,陈迅捷,魏治文,等.橡胶粉掺量与粒径对砂浆耐久性和抗裂性的影响[J].混凝土,2015(10):131- 134.(WEI Hua,CHEN Xunjie,WEI Zhiwen,et al.Effect of content and particle size of rubber powder on durability and crack resistance of cement mortar[J].Concrete,2015(10):131- 134.(in Chinese))
[11] JTJ 270—1998 水运工程混凝土试验规程[S].(JTJ 270—1998 Testing code of concrete for port and waterway engineering[S].(in Chinese))
[12] 管信辉.(甲基)丙烯酸甲酯与胺的酰胺化反应研究[D].青岛:青岛科技大学,2013.(GUAN Xinhui.Studies on amidation reaction of methyl(meth) acrylate and amines[D].Qingdao:Qingdao University of Science and Technology,2013.(in Chinese))
[13] DL/T 5150—2001 水工混凝土试验规程[S].(DL/T 5150—2001 Test code for hydraulic concrete[S].(in Chinese))
[14] 梁乃兴.聚合物改性水泥混凝土[M].北京:人民交通出版社,1995:46- 48.(LIANG Naixing.Polymer modified cement concrete[M].Beijing:China Communications Press,1995:46- 48.(in Chinese))
[15] 朱建辉,田宇宏.聚合物改性超细水泥灌浆材料性能研究[J].西安建筑科技大学学报(自然科学版),2008,40(6):759-763.(ZHU Jianhui,TIAN Yuhong.Modification of grout of superfine cement by polymer emulsion[J].Journal of Xi’an University of Architecture and Technology (Natural Science Edition),2008,40(6):759-763.(in Chinese))
[16] 高鑫,黄剑,熊建波.聚合物改性水下修补灌浆料的性能研究[J].新型建筑材料,2017,44(6):90- 94.(GAO Xin,HUANG Jian,XIONG Jianbo.Research on properties of polymer modified grouting material for underwater repair[J].New Building Materials,2017,44(6):90- 94.(in Chinese))