新老混凝土粘结面冻融劈拉性能试验研究
|
摘要
采用新老混凝土粘结立方体试件,通过快速冻融试验探讨新老混凝土粘结面在水饱和状态下,冻融循环次数、粘结面粗糙度和界面剂类型等对粘结面劈拉强度的影响。试验表明,粘结面劈拉强度随冻融循环次数的增加而降低,粘结面的粗糙度和界面剂对粘结面劈拉强度有不同程度影响,新老混凝土粘结面抗冻能力有待提高。
With cubic bonding specimen of new to old concrete,on quick freeze-thaw test,some factors that play an important role on split tensile strength of bonding new to old concrete were discussed.That is cycles of freeze-thaw,roughness of bonding interface,types of bongding agent.The result demonstrates that split tensile strength of bonding is reducing with cycles freeze-thaw increasing,and interface rougthness have an different degree effect in bongding performance of new to old concrete with agent.The capacity of bonding new to old concrete should be enhanced that resist freeze-thaw damage.
With cubic bonding specimen of new to old concrete,on quick freeze-thaw test,some factors that play an important role on split tensile strength of bonding new to old concrete were discussed.That is cycles of freeze-thaw,roughness of bonding interface,types of bongding agent.The result demonstrates that split tensile strength of bonding is reducing with cycles freeze-thaw increasing,and interface rougthness have an different degree effect in bongding performance of new to old concrete with agent.The capacity of bonding new to old concrete should be enhanced that resist freeze-thaw damage.
引文
[1]邸小坛,周燕.旧建筑物的检测加固与维护[M].北京:地震出版社,1991.
[2]蒋元炯,韩素芬.混凝土工程病害与修补加固[M].北京:海洋出版社,1999.
[3]黄士元.21世纪初期我国混凝土技术发展中的几个重点问题[J].混凝土,2002,(3):3-7.
[4]宋中南.我国混凝土结构加固修复业技术现状与发展对策[J].混凝土,2002,(10):10-17.
[5]赵国藩,赵志方,袁群,等.新老混凝土粘结机理和测试方法研究[R].国家基础性研究重大项目(攀登计划B)之5.2(1)课题1998年年度总结报告.大连:大连理工大学,1997.
[6]刘金伟,谢慧才.修补后龄期对新老混凝土粘结强度的影响[J].土木工程学报,2001,34(1):30-32.
[7]Gengying Li.A new way to increase the long-term bond strength ofnew-to-old concrete by the use of fly ash[J].Cement and ConcreteResearch,2003,33:799-806.
[8]CECS25:90混凝土结构加固技术规范[S].北京:中国计划出版社,1990.
[9]赵志方.新老混凝土粘结机理和测试方法[D].大连:大连理工大学,1998.
[2]蒋元炯,韩素芬.混凝土工程病害与修补加固[M].北京:海洋出版社,1999.
[3]黄士元.21世纪初期我国混凝土技术发展中的几个重点问题[J].混凝土,2002,(3):3-7.
[4]宋中南.我国混凝土结构加固修复业技术现状与发展对策[J].混凝土,2002,(10):10-17.
[5]赵国藩,赵志方,袁群,等.新老混凝土粘结机理和测试方法研究[R].国家基础性研究重大项目(攀登计划B)之5.2(1)课题1998年年度总结报告.大连:大连理工大学,1997.
[6]刘金伟,谢慧才.修补后龄期对新老混凝土粘结强度的影响[J].土木工程学报,2001,34(1):30-32.
[7]Gengying Li.A new way to increase the long-term bond strength ofnew-to-old concrete by the use of fly ash[J].Cement and ConcreteResearch,2003,33:799-806.
[8]CECS25:90混凝土结构加固技术规范[S].北京:中国计划出版社,1990.
[9]赵志方.新老混凝土粘结机理和测试方法[D].大连:大连理工大学,1998.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心