Chloride Ion Permeability of Low Shrinkage Engineered Cementitious Composite

被引：0
作者：
Ding X. [1 ,2 ]
Zhang J. [1 ,2 ]
Wang Q. [1 ,2 ]
机构：
[1] Department of Civil Engineering, Tsinghua University, Beijing
[2] Key Laboratory of Structural Safety and Durability of China Education Ministry, Tsinghua University, Beijing
来源：
Zhang, Jun (junz@tsinghua.edu.cn) | 2017年 / Tongji University卷 / 20期
关键词：
Chloride ion; Crack; Low shrinkage engineered cementitious composite(LSECC); Permeability;
D O I：
10.3969/j.issn.1007-9629.2017.06.001
中图分类号：
学科分类号：
摘要：
Chloride ion permeability of low shrinkage engineered cementitious composites(LSECC) was studied. Specimens of non-cracking LSECC with different water-binder ratios, molding methods and curing ages and cracking LSECC induced by 4-point bending test controlled by deformation in tensile zone were prepared. Chloride ion permeability was evaluated by both ASTM C1202 and NEL methods. Results show that chloride ion permeability of non-cracking LSECC is decreased by utilizing lower water-binder ratio, extrusion method and longer curing age. Chloride ion permeability of cracking LSECC can be divided into two stages: before and after matrix cracking. Number and width of cracks are decreased by lowering water-binder ratio, and similar conclusion can be drawn with the reduction rate of chloride ion penetration. ASTM C1202method is more sensitive to chloride ion permeability of cracking LSECC than NEL method. © 2017, Editorial Department of Journal of Building Materials. All right reserved.
引用
收藏
页码：827 / 834
页数：7
相关论文
共 12 条
  • [1] Jang S.Y., Kim B.S., Oh B.H., Effect of crack width on chloride diffusion coefficients of concrete by steady-state migration tests, Cement and Concrete Research, 41, 1, pp. 9-19, (2011)
  • [2] Djerbi A., Bonnet S., Khelidj A., Et al., Influence of traversing crack on chloride diffusion into concrete, Cement and Concrete Research, 38, 6, pp. 877-883, (2008)
  • [3] Gerard B., Marchand J., Influence of cracking on the diffusion properties of cement-based materials Part I: Influence of continuous cracks on the steady-state regime, Cement and Concrete Research, 30, 1, pp. 37-43, (2000)
  • [4] Gowripalan N., Sirivivatnanon V., Lim C.C., Chloride diffusivity of concrete cracked in flexure, Cement and Concrete Research, 30, 5, pp. 725-730, (2000)
  • [5] Dong Z., Li Q., Wang G., Et al., Experimental study on stress-strain characteristics of steel fiber reinforced concrete under uniaxial tension, Journal of Hydraulic Engineering, 33, 5, pp. 47-50, (2002)
  • [6] Li V.C., Advances in ECC research, ACI Special Publication, 206, pp. 373-400, (2002)
  • [7] Zhang J., Gong C., Guo Z., Et al., Engineered cementitious composite with characteristic of low drying shrinkage, Cement and Concrete Research, 39, 4, pp. 303-312, (2009)
  • [8] Zhang J., Gong C., Guo Z., Et al., Mechanical performance of low shrinkage engineered cementitious composite in tension and compression, Journal of Composite Materials, 43, 22, pp. 2571-2585, (2009)
  • [9] Zhang J., Zhong H., Ju X., Et al., Comparative study on Cl-penetration in cracked high ductility and low shrinkage material and steel fiber concrete, Journal of Building Materials, 15, 2, pp. 151-157, (2012)
  • [10] Zhang J., Li Q., Hou D., Mechanical properties and durability of extruded fiber reinforced cement mortor board and its composite beam, Journal of Civil Architectural and Environmental Engineering, 31, 6, pp. 81-85, (2009)
12