[1]李敏,钱春香.高强混凝土受火后抗渗透性能衰减规律[J].东南大学学报(自然科学版),2006,36(5):825-830.[doi:10.3969/j.issn.1001-0505.2006.05.029]
 Li Min,Qian Chunxiang.Degradation of permeability resistance of high strength concrete after exposed to fire[J].Journal of Southeast University (Natural Science Edition),2006,36(5):825-830.[doi:10.3969/j.issn.1001-0505.2006.05.029]
点击复制

高强混凝土受火后抗渗透性能衰减规律()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
36
期数:
2006年第5期
页码:
825-830
栏目:
材料科学与工程
出版日期:
2006-09-20

文章信息/Info

Title:
Degradation of permeability resistance of high strength concrete after exposed to fire
作者:
李敏 钱春香
东南大学材料科学与工程学院, 南京 210096
Author(s):
Li Min Qian Chunxiang
College of Materials Science and Engineering, Southeast University, Nanjing 210096, China
关键词:
高强混凝土 高温 氯离子渗透系数 湿迁移渗透系数 空气渗透系数
Keywords:
high strength concrete high temperature chloride ion permeability coefficient water permeability coefficient air permeability coefficient
分类号:
TU528
DOI:
10.3969/j.issn.1001-0505.2006.05.029
摘要:
为了对高温后混凝土材料的残余耐久性进行评价,研究了高强混凝土高温后渗透性能的变化.采用氯离子渗透系数、湿迁移渗透系数与空气渗透系数研究了氯离子、水与空气3种不同介质在受高温后混凝土中的传输行为,以及温度、强度等级、骨料种类对HSC高温后渗透性能的影响.试验结果表明:3种渗透系数都能很好地反映高强混凝土高温后渗透性变化; 混凝土的受火温度升高,渗透系数增加; 受相同温度作用后,高强混凝土与普通混凝土相比具有较低的渗透系数,高强混凝土高温后抗渗性衰减程度大于普通混凝土; 以石灰岩为粗骨料的高强混凝土抗渗透性能优于玄武岩为粗骨料的高强混凝土.结合混凝土高温后抗压强度与渗透性能的变化对高温后混凝土材料的残余耐久性做出恰当评价.
Abstract:
To evaluate the remaining durability of concrete materials after fire, the permeability of high strength concrete(HSC)after fire were studied. The transport behavior of chloride ion, water and air in concrete after fire, as well as the effect of temperature, strength grade and aggregation on permeability of HSC after fire were investigated in terms of chloride ion permeability coefficient, water permeability coefficient and air permeability coefficient. The experiment results show that all the three permeability coefficients reflect changes of permeability commendably. The permeability coefficient increases with the evaluating temperature. After the same temperature, the permeability coefficient of HSC is lower than that of normal strength concrete(NSC), however, the degree of degradation of permeability coefficient of HSC is greater than that of NSC. The permeability resistance of HSC containing limestone is better than that of HSC containing basalt. Combining the changes of compressive strength and permeability,the remaining durability of concrete materials after fire is evaluated appropriately.

参考文献/References:

[1] Ellondwing B,Shaver J.Fire effects on reinforced concrete members[J].National Bureau of Standards,1979,18(3):36-39.
[2] Xiao Jianzhuang,Gert Konig.Study on concrete at high temperature in China — an overview[J].Fire Safety Journal,2004,39(1):89-103.
[3] 李卫,过镇海.高温中混凝土的强度和变形性能试验研究[J].建筑结构学报,1993,14(1):8-16.
  Li Wei,Guo Zhenhai.Test research of strength and deformation of concrete during high temperature[J].Construction Structure,1993,14(1):8-16.(in Chinese)
[4] 李淑进,赵铁军.混凝土的渗透性与耐久性[J].海岸工程,2001,20(2):68-72.
  Li Shujin,Zhao Tiejun.Permeability and durability performance of concrete[J]. Coastal Engineering,2001,20(2):68-72.(in Chinese)
[5] Poon C S,Azhar S.Comparison of the strength and durability performance of normal and high strength pzzolanic concretes at elevated temperatures[J].Cem Concr Res,2001,31(9):1291-1300.
[6] Clayton Niqel,Lennon Tom.Performance in fire of high-grade concrete[J].Concrete,2000,34(8):59-64.
[7] 黄玉龙,潘智生.火灾高温对PFA混凝土强度及耐久性的影响[J].水泥基复合材料科学与技术,2000(3):87-90.
  Huang Yulong,Pan Zhisheng.Effect of fire on strength and debility of PFA concrete[J]. Cement-Based Composites Science and Technology,2000(3):87-90.(in Chinese)
[8] Chan Y N,Peng G F,Anson M.Residual strength and pore structure of high-strength concrete and normal strength concrete after exposure to high temperature[J]. Cem Concr Res,1999,21(1):23-27.
[9] Cerny R,Drchalova J.Measuring the moisture diffusivity of board materials[C] // Proc of the CIB W40 Meeting.Porto:University of Porto,1995:147-156.
[10] Vodak F,Cerny R,Drchalova J,et al.Thermophysical properties of concrete for nuclear-safety related structures[J]. Cement and Concrete Research,1997,27(3):415-426.

相似文献/References:

[1]金祖权,孙伟,侯保荣,等.混凝土的高温变形与微结构演化[J].东南大学学报(自然科学版),2010,40(3):619.[doi:10.3969/j.issn.1001-0505.2010.03.035]
 Jin Zuquan,Sun Wei,Hou Baorong,et al.Deformation and microstructure evolution of concrete subjected to elevated temperature[J].Journal of Southeast University (Natural Science Edition),2010,40(5):619.[doi:10.3969/j.issn.1001-0505.2010.03.035]
[2]杨春,蔡健,张学文,等.劲性钢管混凝土组合柱轴压性能试验研究[J].东南大学学报(自然科学版),2002,32(5):715.[doi:10.3969/j.issn.1001-0505.2002.05.008]
 Yang Chun,Cai Jian,Zhang Xuewen,et al.Experimental research on the composite column with cone of concrete filled steel tube under axial loads[J].Journal of Southeast University (Natural Science Edition),2002,32(5):715.[doi:10.3969/j.issn.1001-0505.2002.05.008]
[3]阮静,叶见曙,谢发祥,等.高强度混凝土水化热的研究[J].东南大学学报(自然科学版),2001,31(3):53.[doi:10.3969/j.issn.1001-0505.2001.03.013]
 Ruan Jing,Ye Jianshu,Xie Faxiang,et al.Study on Heat of Hydration on High Strength Concrete[J].Journal of Southeast University (Natural Science Edition),2001,31(5):53.[doi:10.3969/j.issn.1001-0505.2001.03.013]
[4]范圣刚,舒赣平,霍昌盛.高强度螺栓受剪连接抗火性能试验研究[J].东南大学学报(自然科学版),2012,42(6):1180.[doi:10.3969/j.issn.1001-0505.2012.06.029]
 Fan Shenggang,Shu Ganping,Huo Changsheng.Experimental study on fire-resistant behaviour of high-strength bolted shear connections[J].Journal of Southeast University (Natural Science Edition),2012,42(5):1180.[doi:10.3969/j.issn.1001-0505.2012.06.029]
[5]赵永利,孙伟,罗欣.高强及钢纤维高强混凝土K1C、δ1C的研究[J].东南大学学报(自然科学版),1997,27(2):133.[doi:10.3969/j.issn.1001-0505.1997.02.026]
 Study on K 1C and δ 1C of HSC and SFRHSC[J].Journal of Southeast University (Natural Science Edition),1997,27(5):133.[doi:10.3969/j.issn.1001-0505.1997.02.026]
[6]叶邦土,蒋金洋,孙伟,等.玄武岩纤维增强大掺量矿物掺合料高强混凝土试验研究[J].东南大学学报(自然科学版),2011,41(3):611.[doi:10.3969/j.issn.1001-0505.2011.03.035]
 Ye Bangtu,Jiang Jinyang,Sun Wei,et al.Experimental study on reinforcing HSC with large volume mineral admixtures basalt fibers[J].Journal of Southeast University (Natural Science Edition),2011,41(5):611.[doi:10.3969/j.issn.1001-0505.2011.03.035]
[7]范敏,余新泉,薛烽.Fe3Al/TiC复合材料的耐高温冲蚀性能[J].东南大学学报(自然科学版),1999,29(6):136.[doi:10.3969/j.issn.1001-0505.1999.06.029]
 Fan Min,Yu Xinquan,Xue Feng.Erosion Resistance of Fe3Al/TiC Composite at High Temperatures[J].Journal of Southeast University (Natural Science Edition),1999,29(5):136.[doi:10.3969/j.issn.1001-0505.1999.06.029]
[8]慕儒,严安,孙伟.荷载作用下高强混凝土的抗冻性[J].东南大学学报(自然科学版),1998,28(4):138.[doi:10.3969/j.issn.1001-0505.1998.04.028]
 Mu Ru,Yan An,Sun Wei.Frost Resistance of High Strength Concrete on Preloading Flexural Stress[J].Journal of Southeast University (Natural Science Edition),1998,28(5):138.[doi:10.3969/j.issn.1001-0505.1998.04.028]

备注/Memo

备注/Memo:
基金项目: 教育部高等学校骨干教师计划资助项目.
作者简介: 李敏(1974—),女,博士,讲师, limin.li@163.com.
更新日期/Last Update: 2006-09-20