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冻融循环条件下氯化钠浓度对混凝土内部饱水度的影响 被引量：31

EFFECTS OF SODIUM CHLORIDE CONCENTRATION ON SATURATION DEGREE IN CONCRETE UNDER FREEZING-THAWING CYCLES
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摘要 研究了在冻融循环条件下,NaCl浓度对混凝土内部溶液吸入量和饱水度的影响。结果表明:在冻融循环条件下,混凝土的饱水度增加速率在周围覆盖NaCl溶液时明显高于周围覆盖水时的,且吸入溶液量随浓度提高而增加。混凝土吸入溶液量随融化时间的增加而迅速降低,直到达到平衡;在冻融循环条件下,混凝土吸入溶液速率和饱水度增加速率明显快于常温浸泡条件下的。通过把冻融过程分成3个阶段,分析了混凝土受冻或盐冻破坏的机理。 Effects of NaCl concentration on solution absorption and saturation degree in concrete under freezing-thawing cycles were investigated. The results show that the increasing rate of the saturation degree in concrete surrounded with NaCl solution is much higher than that surrounded with water, and the solution absorption in concrete increases with the increase of NaCl concentration. The solution absorption in concrete is obviously reduced with the increase of thawin~ time until reaching equilibrium. The rate of solution absorption and the increase of the saturation degree in concrete under freezing-thawing cycles are much higher than those at normal atmospheric temperatures. Furthermore, by dividing the freezing-thawing cycle into three stages, the frost or deicing-frost deterioration mechanisms of concrete were analyzed.
作者 杨全兵
机构地区 同济大学材料工程研究所先进土木工程材料教育部重点实验室
出处 《硅酸盐学报》 EI CAS CSCD 北大核心 2007年第1期96-100,共5页 Journal of The Chinese Ceramic Society
基金 西部交通建设科技(200131878877)资助项目。
关键词 混凝土 冻融循环 氯化钠 饱水度 受冻或盐冻破坏机理 concrete freezing-thawing cycles sodium chloride saturation degree frost/deicer-frost deterioration mechanisms
分类号 O482.3 [理学—固体物理]
  • 相关文献

参考文献7

  • 1杨全兵.NaCl溶液结冰压的影响因素研究[J].建筑材料学报,2005,8(5):495-498. 被引量：31
  • 2LINDMARK S. Mechanisms of salt frost scaling of portland cement-bound materials: studies and hypothesis [D]. Report TVMB 1017,Division of Building Materials, Lurid Institute of Technology, Lurid University, Sweden, 1998.
  • 3杨全兵.氯化钠对混凝土内部饱水度的影响[J].硅酸盐学报,2005,33(11):1422-1425. 被引量：11
  • 4LITVAN G G Frost action in cement in the presence of de-icers [J].Cem Concr Res, 1976, 6(3): 351-356.
  • 5FAGERLUND G Studies of the scaling, the water uptake and the dilation of mortar specimens exposed to freezing and thawing in NaCl solutions [A]. Freeze-thaw and De-icing Resistance of Concrete [C].RILEM Committee TC-117 FDC Meeting in Lund, TVBM-3048,Lund Institute of Technology, Division Building Materials, 1991.36-66.
  • 6SETZER M J. On the abnormal freezing of pore water and testing on freeze-thaw and deicing salt resistance [A]. International Workshop on the Resistance of Concrete to Scaling due to Freezing in the Presence of Deicing Salts [C], University Laval, Quebec, 1993. 1-20.
  • 7GEIKER M, THAULOW N. Ingress of moisture due to freeze/thaw exposure [A]. In: LINDMARK S ed. Frost Resistance of Building Materials [C], Lurid Institute of Technology, Division Building Materials,1996. 159-162.

二级参考文献10

  • 1POWERS T C. The mechanisms of frost action in concrete (Durability of Concrete, SP-8)[R]. Detroit: ACI, 1965.42-47.
  • 2LITVAN G G. Frost action in cement in the presence of deicers [A]. Proceedings of 6th International Congress on the Chemistry of Cement[C]. Moscow:[sn], 1974. 2 : 145- 152.
  • 3PETERSSON P E. Influence of minimum temperature on the scaling resistance of concrete (SP-Report, 1994.22)[R]. Stockholm: Swedish National Testing and Research Institute, 1994.
  • 4FAGERLUND G. The critical degree of saturation method of assessing the freeze/thaw durability of concrete[J]. Materials and Structures,1977,(10) :58-65.
  • 5POWERS T C. The mechanisms of frost action in concrete [R]. ACI SP-8. Detroit:ACI, 1965. 62.
  • 6LITVAN G G. Frost action in cement in the presence of deicers [A]. 6th International Congress on the Chemistry of Cement [C], Moscow, 1974. 56-62.
  • 7PETERSSON P E. Influence of minimum temperature on the scaling resistance of concrete [R]. SP-Report 1994-22.Lund: Swedish National Testing and Research Institute, 1994. 24.
  • 8PUHRINGER J. Deterioration of materials by hydraulic pressure in salt water systems--an outline model [A]. Proceedings of the 8th International Congress on Deterioration and Conservation of Stone [C], Berlin, Germany, 1996. 771-782.
  • 9FAGERLUND G. Synergetic effects of combined destructive action on concrete [A]. Proceedings of the International Symposium on Role of Concrete in Sustainable Development[C],Scotland, 2003. 82-88.
  • 10FAGERLUND G. The critical degree of saturation method of assessing the freeze-thaw resistance of concrete [J]. Mater Struct, 1977, 10: 217-229.

共引文献37

同被引文献222

引证文献31

二级引证文献268

硅酸盐学报
2007年 第1期

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