Influence Factors of Frost-Salt Ｒesistance of Cement Concrete

doi:10.3969 /j.issn.1674-0696.2013.04.12

Abstract

Abstract: The influence factors on frost-salt resistance of cement concrete including air void systems，surface conditions and loads are studied by indoor test． The results show that the spacing factor has more impact on frost-salt resistance of concrete than air content does． The frost-salt resistance of concrete is not so sensitive if the air content is beyond 6% or the spacing factor is less than 0． 18mm．Ｒesults also indicate that different surface properties have influence on frost-salt resistance of concrete． Improper operation and surface weeping of concrete will lower the frost-salt resistance of cement concrete by lowering the strength of concrete and degrading the air void structural parameters． And the coupling interaction of load and freezedeicer scaling cycle will greatly accelerate the frost-salt scaling of concrete． And the general laboratory tests may overrate the frost-salt resistance of concrete in practical engineering．

Key words: concrete, air void structure, frost-salt scaling, surface conditions, coupling

摘要： 通过室内试验研究了气孔结构、表面性质以及荷载耦合作用对混凝土抗盐冻性能的影响规律。结果表明: 气泡间距系数相比含气量对混凝土抗盐冻性能的影响更敏感; 当新拌混凝土含气量＞ 6%、硬化混凝土气泡间距系数＜ 0． 18 mm时，气泡结构参数对混凝土抗盐冻性能的影响钝化; 表面泌水、抹面操作不当除了会引起混凝土表面水泥石强度降低以外，还可能会导致混凝土表面气泡结构参数劣化，降低混凝土的抗盐冻性能; 重复荷载和盐冻循环的耦合作用会加剧混凝土的盐冻破坏，一般的室内盐冻试验可能会高估混凝土实体工程使用过程中的抗盐冻性能。

关键词: 混凝土, 气孔结构, 盐冻剥蚀, 表面性质, 耦合作用

CLC Number:

U448.2

Zhang Hui，Pan Yonqiang，Zhang Jian，Zhu Lei. Influence Factors of Frost-Salt Ｒesistance of Cement Concrete[J]. Journal of Chongqing Jiaotong University(Natural Science), 2013, 32(4): 597-600.

张辉，潘友强，张健，朱雷. 水泥混凝土抗盐冻性能影响因素研究[J]. 重庆交通大学学报（自然科学版）, 2013, 32(4): 597-600.

References

[1] 杨全兵，黄士元．受冻地区混凝土的盐冻破坏[J]．公路，1998( 8) : 25-28．
Yang Quanbing，Huang Shiyuan． Deicer-frost scaling of concrete in frost region [J]． Highway，1998( 8) :25-28．
[2] 杨全兵．混凝土盐冻破坏机理( Ⅰ) ———毛细管饱水度和结冰压[J]．建筑材料学报，2007， 10( 5) : 522-527．
Yang Quanbing． Mechanisms of deicer-frost scaling of concrete( Ⅰ) : Capillary-uptake degree of saturation and ice-formation pressure[J]． Journal of Building Materials，2007， 10( 5) : 522-527．
[3] 李辉．寒区水泥混凝土路面抗盐冻破坏的研究[J]．中国科技信息，2005( 12) : 160．
Li Hui．Ｒesearch on deicer-frost scaling of cement concrete pavement in frost region [J]． China Science and Technology Information，2005 ( 12) : 160．
[4] 李中华，巴恒静．混凝土的抗盐冻性能[J]．吉林大学学报: 工学版，2009， 39( 4) : 926-931．
Li Zhonghua，Ba Hengjing． Freeze-deicing salt resistance of concrete[J]． Journal of Jilin University: Engineering and Technology Edition，2009，39( 4) : 926-931．
[5] 李连志，于静波．混凝土抗盐冻性能的试验研究[J]．黑龙江工程学院学报: 自然科学版， 2008，22( 3) : 14-17．
Li Lianzhi，Yu Jingbo． Experimental research on salt-frost resistance of concrete[J]． Journal of Heilongjiang Institute of Technology:Natural Science，2008，22 ( 3) : 14-17．
[6] 杨华全，周世华，苏杰．气泡参数对引气混凝土性能的影响[J]．水力发电， 2009， 35( 1) : 1-3．
Yang Huaquan，Zhou Shihua，Su Jie． Effect of air void parameters on properties of air entraining concrete [J]． Water Power，2009，35( 1) : 1-3．
[7] 张金喜，郭明洋，杨峻荣．引气剂对硬化混凝土结构和性能的影响[J]．武汉理工大学学报，2008， 30( 5) : 38-41．
Zhang Jinxi，Guo Mingyang，Yang Junrong． Effect of air-entraining admixtures on the structure and properties of hardened concrete[J]． Journal of Wuhan University of Technology，2008，30( 5) :38-41．
[8] Santagataa M C，Collepardi M． The effect of CMA deicers on concrete properties [J]． Cement and Concrete Ｒesearch，2000，30:1389-1394．
[9] Giergiczny Z，Glinicki M A，Sokolowski M． Air void system and frost-salt scaling of concrete containing slag-blended cement [J]．Construction and Building Materials，2009，23: 2451-2456．
[10] Pigeon M，Marchand J，Pleau Ｒ． Frost resistant concrete [J]．Construction and Building Materials，1996，10( 5) : 339-348．
[11] ＲILEM Ｒecemmendation．ＲILEM TC-117 FDC CDF-test-Test method for the freeze thaw resistance of concrete with sodium chloride solutions[J]． Materials and Structures，1996，29: 523-528．

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