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时间:2019-02-27
《阻锈剂对混凝土耐久性的影响研究》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、2012年第2期(总第268期)混凝土原材料及辅助物料Number2in2012(TotalNo.268)ConcreteMATER/ALANDADMINICLEdoi:10.3969/j.issn.1002—3550.2012.02.023阻锈剂对混凝土耐久性的影响研究秦宪明’,彭鹏飞,鄢礼传、,李悦2(1.厦门市宏业工程建设技术有限公司,福建Nfl361000;2.北京工业大学,北京lO0000)摘要:采用海水热雨循环90次、海水浸泡90d2种试验条件对比研究了4种混凝土的强度、扩散系数、电通量和钢
2、筋腐蚀电位等性能变化。结果表明:经热雨循环90次试样抗压强度较海水浸泡90d的高,掺加阻锈剂降低混凝土试样的强度;经热雨循环90次试样扩散系数较标样28d试样提高,但电通量降低,海水浸泡90d试样扩散系数和电通量均较28d试样降低,C30级试验扩散系数和扩散系数较C50级高,掺加阻锈剂提高混凝土试样的扩散系数和扩散系数;经热雨循环90次试样内钢筋腐蚀电位较标样28d试样降低,海水浸泡90d试样内钢筋腐蚀电位较28d试样降低,但高于热雨循环90次试样,C30级混凝土试样钢筋腐蚀电位下降幅度较大,个别试样内
3、钢筋发生点蚀,掺加阻锈剂提高试样内钢筋腐蚀电位。关键词:热雨试验箱;阻锈剂;耐久性中图分类号:TU528.042,6文献标志码:A文章编号:1002—3550(2012)02—0075—03StudyontheinfluenceofcorrosioninhibitoronconcretedurabilityQINXian-ruing~,PENGPeng-fei,YANLi—chuan,LIYue(1.XiamenHongyeProjectBuildingTechniqueCo.,Ltd.,Xiamen3
4、61000,China;2.BeijingUniversityofTechnology,Beijing100000,China)Abstract:Usingheatandseawatershowercycles90timesandseawaterimmersion90d,thestrength,diffusioncoeficient,Fluxandcorrosionpotentialoffourconcretewerecomparativelystudied.Theresultsshowedthatco
5、mpressivestrengthsofsamplesby90timesheatandseawatershowercycleswerehigherthansamplesby90dseawaterimmersion;theaddingofcorrosioninhibitorcouldreducethestrengthsofconcretes;diffusioncoeficientsofsamplesby90timesheatandseawatershowercycleswerehigherthansamp
6、lescuredinstandardconditionfor28d,butflexeswerelower;diffusioncoeficientsandflexesofsamplesby90dseawaterimmersionwerebothlowerthansamplescuredinstandardconditionfor28d;theaddingofcorosioninhibitorcouldincreasethediffusioncoeficientsofconcrete;thecorrosio
7、npotentialofrebarofsamplesby90timesheatandseawatershowercycleswerelowerthansamplescuredinstandardconditionfor28d;thecorosionpotentialofrebarofsamplesby90dseawaterimmersionwerealsolowerthansamplescuredinstandardconditionfor28d.buthigherthansamplesby90time
8、sheatandseawatershowercycles;thecorrosionpotentialofrebarofconcretesofC30gradeby90timesheatandseawatershowercyclesweremuchlowerthanC50grade,andpiUingcouldbefoundontherebarofthat;addingofcorrosioninhibitorintoconcretecouldi
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