水下不分散混凝土海水环境下的结构与性能
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摘要
配制C40水下不分散混凝土,探究海水养护对掺入不同矿物掺和料的混凝土结构与性能的影响.通过力学性能的研究,发现海水养护能提升混凝土早期抗压强度,降低长期强度.采用压汞法测出的孔隙结构表明海水养护降低混凝土的孔隙率.矿物掺和料能细化孔结构,减弱海水中有害离子对混凝土结构的影响,其中掺加硅灰优于粉煤灰和矿粉1∶1复掺与沸石粉,硅灰最佳掺量为8%.
C40 non-dispersion underwater concrete is designed in order to explore the effect of seawater on the concrete structure and performance of different mineral substances. Through the study of mechanical properties,it is found that the marine environment can improve the strength of the concrete early and reduce the long-term strength. The pore structure measured by mercury intrusion method is shown to reduce the porosity of the concrete. The mineral substances can refine the pore structure and reduce the effect of harmful ions on the structure of the concrete. The mixing of silica fume is superior to the powder coal ash with mine powder and the powder of zeolite,the optimum quantity is 8%.
C40 non-dispersion underwater concrete is designed in order to explore the effect of seawater on the concrete structure and performance of different mineral substances. Through the study of mechanical properties,it is found that the marine environment can improve the strength of the concrete early and reduce the long-term strength. The pore structure measured by mercury intrusion method is shown to reduce the porosity of the concrete. The mineral substances can refine the pore structure and reduce the effect of harmful ions on the structure of the concrete. The mixing of silica fume is superior to the powder coal ash with mine powder and the powder of zeolite,the optimum quantity is 8%.
引文
[1]朱仲基.浅谈钻孔灌注桩水下混凝土施工[J].科技信息,2012(5):443-444.
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[3]梁志林,张长民,雷敬伟,等.水下不分散混凝土在三峡工程中的应用[J].混凝土,2006(12):78-80.
[4]刘道维.水下不分散硅粉混凝土技术的应用-护岸灌注桩的修补加固[J].水电与新能源,2014(9):36-42.
[5]张鸣,王付鸣,叶坤,等.粉煤灰和矿渣粉对水下不分散混凝土性能的影响研究[J].硅酸盐通报,2016,35(8):2612-2616.
[6]JOSEPH J,CAMILLE A I.Mechanisms of strength loss in underwater concrete[J].Materials and Structures,2013,46(10):1613-1629.
[7]WILLIAM VELEZ,FABIO MATTA,PAUL ZIEHL.Electrochemical characterization of early corrosion in pretested concrete exposed to salt water[J].Materials and Structures,2016,49(1-2):507-520.
[8]赵晶.水下不分散混凝土在海水环境下强度发展特性[J].混凝土,2015(8):31-34.
[9]金珊珊,张金喜,陈春珍,等.水泥砂浆孔结构分形特征的研究[J].硅酸盐通报,2011,14(1):93-105.
[10]吴中伟,廉慧珍.高性能混凝土[M].北京:中国铁道出版社,1999:22-25.
[2]陈光国,孙磊.天桥水电站大坝上游围堰水下混凝土施工浅谈[J].四川水利,2011(3):27-29.
[3]梁志林,张长民,雷敬伟,等.水下不分散混凝土在三峡工程中的应用[J].混凝土,2006(12):78-80.
[4]刘道维.水下不分散硅粉混凝土技术的应用-护岸灌注桩的修补加固[J].水电与新能源,2014(9):36-42.
[5]张鸣,王付鸣,叶坤,等.粉煤灰和矿渣粉对水下不分散混凝土性能的影响研究[J].硅酸盐通报,2016,35(8):2612-2616.
[6]JOSEPH J,CAMILLE A I.Mechanisms of strength loss in underwater concrete[J].Materials and Structures,2013,46(10):1613-1629.
[7]WILLIAM VELEZ,FABIO MATTA,PAUL ZIEHL.Electrochemical characterization of early corrosion in pretested concrete exposed to salt water[J].Materials and Structures,2016,49(1-2):507-520.
[8]赵晶.水下不分散混凝土在海水环境下强度发展特性[J].混凝土,2015(8):31-34.
[9]金珊珊,张金喜,陈春珍,等.水泥砂浆孔结构分形特征的研究[J].硅酸盐通报,2011,14(1):93-105.
[10]吴中伟,廉慧珍.高性能混凝土[M].北京:中国铁道出版社,1999:22-25.