基于氯离子渗透机制的超高性能混凝土生命周期预测
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摘要
目的以现有的混凝土生命周期预测理论为基础,根据试验研究结果,对特定结构超高性能混凝土构件的生命周期进行预测.方法对超高性能混凝土试件进行氯离子渗透试验,测得不同深度处氯离子质量分数,并建立氯离子质量分数与深度的函数关系,以理论公式计算超高性能混凝土的氯离子扩散系数,代入计算模型计算超高性能混凝土构件的使用寿命.结果在钢筋保护层较小情况下,即使在海水入侵环境或除冰盐环境中,超高性能混凝土制品的使用寿命均可以达到50a以上,具备工程利用价值.结论氯离子渗透机制可以作为混凝土结构生命周期预测的有效手段.
Based on the existing concrete life cycle prediction theory,the life cycle prediction of ultra-high performance concrete members with special structure is carried out according to the experimental results.The chloride penetration test of ultra-high performance concrete(UHPC) specimens was carried out,in which the chloride ion concentrations at different depth were measured.Functions between the chloride ion concentration and depth are established.Chloride ion diffusion coefficient of ultra-high performance concrete is calculated theoretically,and the service life of ultra-high performance concrete could be calculated.The results showthat,even if the reinforced protection layer is smaller,in the environment of seawater intrusion or deicing salt environment,ultra high performance concrete product service life could be more than 50 years,which means that the UHPC has the value of engineering utilization.Chloride ion permeation mechanism could be used as an effective means of life cycle prediction of UHPC.
Based on the existing concrete life cycle prediction theory,the life cycle prediction of ultra-high performance concrete members with special structure is carried out according to the experimental results.The chloride penetration test of ultra-high performance concrete(UHPC) specimens was carried out,in which the chloride ion concentrations at different depth were measured.Functions between the chloride ion concentration and depth are established.Chloride ion diffusion coefficient of ultra-high performance concrete is calculated theoretically,and the service life of ultra-high performance concrete could be calculated.The results showthat,even if the reinforced protection layer is smaller,in the environment of seawater intrusion or deicing salt environment,ultra high performance concrete product service life could be more than 50 years,which means that the UHPC has the value of engineering utilization.Chloride ion permeation mechanism could be used as an effective means of life cycle prediction of UHPC.
引文
[1]RICHARD P,CHEYREZY M.Composition of reactive pow der concretes[J].Cement&concrete research,1995,25(7):1501-1511.
[2]吴中伟.高性能混凝土:绿色混凝土[J].混凝土与水泥制品,2000(1):3-6.(WU Zhongwei.High performance concrete:green concrete[J].Concrete and cement products,2000(1):3-6.)
[3]刘志勇,马立国.高强混凝土的抗冻性与寿命预测模型[J].工业建筑,2005(1):11-14.(LIU Zhiyong,MA Liguo.Durability and service life prediction model for freezing and thaw ing cycle of high strength concrete[J].Industrial construction,2005(1):11-14.)
[4]施惠生,王琼.海工混凝土使用寿命预测研究[J].建筑材料学报,2004,7(2):161-167.(SHI Huisheng,WANG Qiong.Research on service life prediction of marine concrete.Journal of building materials,2004,7(2):161-167.)
[5]余红发,孙伟,金祖权,等.土木工程结构混凝土寿命预测的损伤演化方程[J].东南大学学报(自然科学版),2006(增刊2):216-220.(YU Hongfa,SUN Wei,JIN Zuquan,et al.Damage evolution equaiton for life prediction of concrete structures in key civil engineering[J].Journal of southeast university(natural science edition),2006(S2):216-220.)
[6]纪玉岩.海洋环境下活性粉末混凝土耐久性研究[D].哈尔滨:哈尔滨工业大学,2011.(JI Yuyan.Durability research of reactive powder concrete in marine environment[D].Harbin:Harbin institute of technology,2011.)
[7]王立久.混凝土抗冻耐久性预测数学模型[J].混凝土,2009(4):1-4.(WANG Lijiu.Predicting numerical model for the freeze proof durability of concrete[J].Concrete,2009(4):1-4.)
[8]TANG L,GULIKERS J.On the mathematics of time-dependent apparent chloride diffusion coefficient in concrete[J].Cement&concrete research,2007,37(4):589-595.
[9]冯仲伟,谢永江,朱长华,等.混凝土电通量和氯离子扩散系数的若干问题研究[J].混凝土,2007(10):7-11.(FENG Zhongwei,XIE Yongjiang,ZHU Changhua,et al.Research on the issues about rapid chloride permeability test results and chloride diffusion coefficient of concrete[J].Concrete,2007(10):7-11.)
[10]ASTM C.Standard test method for electrical indication of concrete’s ability to resist chloride ion penetration[J].Astm,1997(25):105-112.
[11]谭志催,李悦.混凝土电通量与氯离子扩散系数关系研究[J].商品混凝土,2008,3:12-14.(TAN Zhicui,LI Yue.Researching the relationship of concrete's electric flux and chloride diffusion coefficient[J].Ready-mixed concrete,2008,3:12-14.)
[12]郑文忠,吕雪源.活性粉末混凝土研究进展[J].建筑结构学报,2015(10):44-58.(ZHENG Wenzhong,LüXueyuan.Literature review of reactive pow der concrete[J].Journal of building structures,2015(10):44-58.)
[13]冷发光,冯乃谦.高性能混凝土渗透性和耐久性及评价方法研究[J].低温建筑技术,2000(4):14-16.(LENG Faguang,FENG Naiqian.Prediction method research on permeability and durability of high performance concrete[J].Low temperature architecture technology,2000(4):14-16.)
[14]王月,安明喆,余自若,等.冻融循环作用下活性粉末混凝土中的氯离子分布及扩散系数[J].建筑材料学报,2016,19(5):810-815.(WANG Yue,AN Mingzhe,YU Ziruo,et al.Chloride ion distribution and diffusion coefficient of reactive pow der concrete under freezethaw cycling[J].Journal of building materials,2016,19(5):810-815.)
[15]周洪杰.海水入侵对大连市牧城驿地区农田土壤生态的影响[J].国土与自然资源研究,2006(4):34-35.(ZHOU Hongjie.The influence of sea water invade to farmland soil ecosystem in muchengyi Dalian[J].Territory&natural resources study,2006(4):34-35.)
[16]陈浩宇,余红发,刘连新,等.混凝土在海洋环境和除冰盐条件下的氯离子扩散行为[J].华中科技大学学报(城市科学版),2005(3):48-52.(CHEN Haoyu,YU Hongfa,LIU Lianxin,et al.Chloride diffusion of concretes exposed to marine environment and deicing salt[J].Journal of huazhong university of science and technology(city science edition),2005(3):48-52.)
[17]THOMAS M,BAMFORTH P B.Modelling chloride diffusion in concrete:Effect of fly ash and slag[J].Cement&concrete research,1999,29(4):487-495.
[18]叶青,朱劲松,马成畅,等.活性粉末混凝土的耐久性研究[J].新型建筑材料,2006(6):33-36.(YE Qing,ZHU Jingsong,MA Chengchang,et al.Study on durability of reactive pow der concrete[J].New building materials,2006(6):33-36.)
[19]金凌志,何培,陈宜虎.不同活性掺合料RPC抗氯离子渗透性能试验研究[J].混凝土与水泥制品,2014(6):21-27.(JIN Lingzhi,HE Pei,CHEN Yihu.Study on the resistance to chloride ion penetration performance of reactive pow der concrete w ith different active admixture[J].China concrete and cement products,2014(6):21-27.)
[20]JENNINGS H M.A model for the microstructure of calcium silicate hydrate in cement paste[J].Cement and concrete research,2000,30(1):101-116.
[21]余自若,高康,安明喆,等.活性粉末混凝土微观结构及其对强度与抗氯离子渗透性能的影响研究[J].西安建筑科技大学学报(自然科学版),2013,45(1):31-37.(YU Ziruo,GAO Kang,AN Mingzhe,et al.Influence of micro-structure on the strength and resistance to chloride ion permeability of reactive pow der concrete[J].Journal of Xi'an university of architecture&technology(natural science edition),2013,45(1):31-37.)
[2]吴中伟.高性能混凝土:绿色混凝土[J].混凝土与水泥制品,2000(1):3-6.(WU Zhongwei.High performance concrete:green concrete[J].Concrete and cement products,2000(1):3-6.)
[3]刘志勇,马立国.高强混凝土的抗冻性与寿命预测模型[J].工业建筑,2005(1):11-14.(LIU Zhiyong,MA Liguo.Durability and service life prediction model for freezing and thaw ing cycle of high strength concrete[J].Industrial construction,2005(1):11-14.)
[4]施惠生,王琼.海工混凝土使用寿命预测研究[J].建筑材料学报,2004,7(2):161-167.(SHI Huisheng,WANG Qiong.Research on service life prediction of marine concrete.Journal of building materials,2004,7(2):161-167.)
[5]余红发,孙伟,金祖权,等.土木工程结构混凝土寿命预测的损伤演化方程[J].东南大学学报(自然科学版),2006(增刊2):216-220.(YU Hongfa,SUN Wei,JIN Zuquan,et al.Damage evolution equaiton for life prediction of concrete structures in key civil engineering[J].Journal of southeast university(natural science edition),2006(S2):216-220.)
[6]纪玉岩.海洋环境下活性粉末混凝土耐久性研究[D].哈尔滨:哈尔滨工业大学,2011.(JI Yuyan.Durability research of reactive powder concrete in marine environment[D].Harbin:Harbin institute of technology,2011.)
[7]王立久.混凝土抗冻耐久性预测数学模型[J].混凝土,2009(4):1-4.(WANG Lijiu.Predicting numerical model for the freeze proof durability of concrete[J].Concrete,2009(4):1-4.)
[8]TANG L,GULIKERS J.On the mathematics of time-dependent apparent chloride diffusion coefficient in concrete[J].Cement&concrete research,2007,37(4):589-595.
[9]冯仲伟,谢永江,朱长华,等.混凝土电通量和氯离子扩散系数的若干问题研究[J].混凝土,2007(10):7-11.(FENG Zhongwei,XIE Yongjiang,ZHU Changhua,et al.Research on the issues about rapid chloride permeability test results and chloride diffusion coefficient of concrete[J].Concrete,2007(10):7-11.)
[10]ASTM C.Standard test method for electrical indication of concrete’s ability to resist chloride ion penetration[J].Astm,1997(25):105-112.
[11]谭志催,李悦.混凝土电通量与氯离子扩散系数关系研究[J].商品混凝土,2008,3:12-14.(TAN Zhicui,LI Yue.Researching the relationship of concrete's electric flux and chloride diffusion coefficient[J].Ready-mixed concrete,2008,3:12-14.)
[12]郑文忠,吕雪源.活性粉末混凝土研究进展[J].建筑结构学报,2015(10):44-58.(ZHENG Wenzhong,LüXueyuan.Literature review of reactive pow der concrete[J].Journal of building structures,2015(10):44-58.)
[13]冷发光,冯乃谦.高性能混凝土渗透性和耐久性及评价方法研究[J].低温建筑技术,2000(4):14-16.(LENG Faguang,FENG Naiqian.Prediction method research on permeability and durability of high performance concrete[J].Low temperature architecture technology,2000(4):14-16.)
[14]王月,安明喆,余自若,等.冻融循环作用下活性粉末混凝土中的氯离子分布及扩散系数[J].建筑材料学报,2016,19(5):810-815.(WANG Yue,AN Mingzhe,YU Ziruo,et al.Chloride ion distribution and diffusion coefficient of reactive pow der concrete under freezethaw cycling[J].Journal of building materials,2016,19(5):810-815.)
[15]周洪杰.海水入侵对大连市牧城驿地区农田土壤生态的影响[J].国土与自然资源研究,2006(4):34-35.(ZHOU Hongjie.The influence of sea water invade to farmland soil ecosystem in muchengyi Dalian[J].Territory&natural resources study,2006(4):34-35.)
[16]陈浩宇,余红发,刘连新,等.混凝土在海洋环境和除冰盐条件下的氯离子扩散行为[J].华中科技大学学报(城市科学版),2005(3):48-52.(CHEN Haoyu,YU Hongfa,LIU Lianxin,et al.Chloride diffusion of concretes exposed to marine environment and deicing salt[J].Journal of huazhong university of science and technology(city science edition),2005(3):48-52.)
[17]THOMAS M,BAMFORTH P B.Modelling chloride diffusion in concrete:Effect of fly ash and slag[J].Cement&concrete research,1999,29(4):487-495.
[18]叶青,朱劲松,马成畅,等.活性粉末混凝土的耐久性研究[J].新型建筑材料,2006(6):33-36.(YE Qing,ZHU Jingsong,MA Chengchang,et al.Study on durability of reactive pow der concrete[J].New building materials,2006(6):33-36.)
[19]金凌志,何培,陈宜虎.不同活性掺合料RPC抗氯离子渗透性能试验研究[J].混凝土与水泥制品,2014(6):21-27.(JIN Lingzhi,HE Pei,CHEN Yihu.Study on the resistance to chloride ion penetration performance of reactive pow der concrete w ith different active admixture[J].China concrete and cement products,2014(6):21-27.)
[20]JENNINGS H M.A model for the microstructure of calcium silicate hydrate in cement paste[J].Cement and concrete research,2000,30(1):101-116.
[21]余自若,高康,安明喆,等.活性粉末混凝土微观结构及其对强度与抗氯离子渗透性能的影响研究[J].西安建筑科技大学学报(自然科学版),2013,45(1):31-37.(YU Ziruo,GAO Kang,AN Mingzhe,et al.Influence of micro-structure on the strength and resistance to chloride ion permeability of reactive pow der concrete[J].Journal of Xi'an university of architecture&technology(natural science edition),2013,45(1):31-37.)