缓凝型环氧树脂建筑结构胶的制备与性能研究
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摘要
以高活性酚醛胺(T-31)为主固化剂、聚酰胺树脂(PA)为辅助固化剂及增韧改性组分、气相白炭黑为触变改性组分,以水泥、超细石英砂及石棉纤维为增稠及增强改性组分,制备了高温施工适用期较长、触变性较好、强度较高及韧性较佳的EP(环氧树脂)建筑结构胶。研究结果表明:该结构胶的适用期为75min,并且垂直施工无流淌现象;该结构胶的1d压缩强度为60MPa、14d压缩强度为80MPa、14d拉伸强度为35MPa、14d剪切强度为17MPa且其与混凝土界面的正拉粘接强度为6.0MPa(界面破坏形式为混凝土内聚破坏),完全满足GB50728—2011标准中的指标要求。
With highly active phenolic aldehyde amine(T-31)as main curing agent,polyamide resin(PA)asauxiliary curing agent and toughened modified component,gas phase white carbon black as thixotropic modifiedcomponent,cement,ultrafine quartz sand and asbestos fiber as thickened and enhanced modified components,soan epoxy resin(EP) building structural adhesive,which had the longer working life of construction at hightemperature,the better thixotropy,the higher strength,and the better toughness,was prepared.The research resultsshowed that the working life of structural adhesive was 75 min,and it hadn't the flowing phenomenon at verticalconstruction.The structural adhesive could completely meet the index requirements in GB 50728—2011 standardbecause its compression strengths at 1 d or 14 d were 60 MPa or 80 MPa,tensile strength at 14 d was 35 MPa,shearstrength at 14 d was 17 MPa,and the positive tensile bonding strength of interface between the structural adhesiveand the concrete was 6.0 MPa(the interface failure form was a concrete cohesion damage).
With highly active phenolic aldehyde amine(T-31)as main curing agent,polyamide resin(PA)asauxiliary curing agent and toughened modified component,gas phase white carbon black as thixotropic modifiedcomponent,cement,ultrafine quartz sand and asbestos fiber as thickened and enhanced modified components,soan epoxy resin(EP) building structural adhesive,which had the longer working life of construction at hightemperature,the better thixotropy,the higher strength,and the better toughness,was prepared.The research resultsshowed that the working life of structural adhesive was 75 min,and it hadn't the flowing phenomenon at verticalconstruction.The structural adhesive could completely meet the index requirements in GB 50728—2011 standardbecause its compression strengths at 1 d or 14 d were 60 MPa or 80 MPa,tensile strength at 14 d was 35 MPa,shearstrength at 14 d was 17 MPa,and the positive tensile bonding strength of interface between the structural adhesiveand the concrete was 6.0 MPa(the interface failure form was a concrete cohesion damage).
引文
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[14]CAROLAN D,IVANKOVIC A,KINLOCH A J,et al.Toughening of epoxy-based hybrid nanocomposites[J].Polymer,2016,97:179-190.
[15]聂亚楠,谷坤鹏,王成启.改性环氧乙烯基酯结构胶粘剂的性能研究[J].化学与黏合,2015,37(6):393-396.
[16]WADA M,KAWAI K,SUZUKI T,et al.Effect of superheated steam treatment of carbon fiber on interfacial adhesion to epoxy resin[J].Composites Part A:Applied Science and Manufacturing,2016,85:156-162.
[2]陈礼忠,金仁兴.预制节段梁拼装中的环氧粘接剂特性分析及施工运用[J].建筑施工,2008,30(7):582-584.
[3]吴唯,刘明昌,陈玉,等.E-51环氧树脂固化反应中动力学转变[J].复合材料学报,2011,28(4):1-6.
[4]黄云涌,朱可嘉.环氧胶粘剂在不同固化条件下的凝胶化时间研究[J].公路与汽运,2015(2):98-100.
[5]王冬,祝烨然,石明建,等.用于港工预应力混凝土大管桩HLC-LZ建筑结构胶的研究[J].新型建筑材料,2014,41(6):22-24.
[6]JIN H H,MILLER G M,PETY S J,et al.Fracture behavior of a self-healing,toughened epoxy adhesive[J].International Journal of Adhesion&Adhesives,2013,44:157-165.
[7]GB/T 7123.1-2015多组分胶粘剂可操作时间的测定[S].
[8]GB/T 2567-2008树脂浇铸体性能试验方法[S].
[9]GB/T 7124-2008胶粘剂拉伸剪切强度的测定(刚性材料对刚性材料)[S].
[10]GB 50728-2011工程结构加固材料应用安全性鉴定规范[S].
[11]伊浩,李波,刘玉亭,等.环氧树脂用聚酰胺固化剂的合成与性能[J].中国胶粘剂,2016,25(1):9-12.
[12]姚海松,刘伟区,侯孟华,等.高分子硅烷偶联剂改性环氧树脂性能研究[J].高分子材料科学与工程,2006,22(2):133-136.
[13]江涛.瓦克HDK气相二氧化硅的性能及其在胶粘剂中的解决方案[J].中国胶粘剂,2008,17(5):58-62.
[14]CAROLAN D,IVANKOVIC A,KINLOCH A J,et al.Toughening of epoxy-based hybrid nanocomposites[J].Polymer,2016,97:179-190.
[15]聂亚楠,谷坤鹏,王成启.改性环氧乙烯基酯结构胶粘剂的性能研究[J].化学与黏合,2015,37(6):393-396.
[16]WADA M,KAWAI K,SUZUKI T,et al.Effect of superheated steam treatment of carbon fiber on interfacial adhesion to epoxy resin[J].Composites Part A:Applied Science and Manufacturing,2016,85:156-162.