细骨料携带氯离子的砂浆强度和粘结力长期暴露试验研究

张小刚; 王卫仑; 王娇; 杨瑞

doi:10.13204/j.gyjz201105001

细骨料携带氯离子的砂浆强度和粘结力长期暴露试验研究

doi: 10.13204/j.gyjz201105001

1.
深圳大学土木工程学院,深圳市土木工程耐久性重点实验室,广东深圳518060

基金项目:

国家自然科学基金项目(50908148);住房与城乡建设部研究开发项目(2009-K4-23,2010-11-33)

详细信息

作者简介:
第一作者：张小刚, 男, 1978年出生, 博士, 副教授。E-mail：bszxg@126.com

中图分类号: TU528.041
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- 文章访问数: 111
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- PDF下载量: 116
- 被引次数: 0
出版历程
- 收稿日期: 2010-09-25
- 刊出日期: 2011-05-20

LONG-TERM EXPOSURE EXPERIMENTAL INVESTIGATION ON MORTAR STRENGTH AND ITS BOND PERFORMANCE WITH CHLORIDE ION PERMEATING IN SANDS

1.
Shenzhen Municipal Key Laboratory for Durability of Civil Engineering Structure,College of Civil Engineering,Shenzhen University,Shenzhen 518060,China

摘要

摘要: 首先研究了细骨料携带不同质量分数氯离子的砂浆试件在3，5，7，14，28，90d的抗折、抗压强度的变化规律，发现与拌制用水中携带氯离子具有早强作用不同，细骨料携带氯离子不但不会引起早强，反而会降低强度。基于4年的长期暴露试验，系统研究细骨料携带不同质量分数氯离子的砂浆试件在270，360，450，630，810，1050，1170，1320，1440d时的-s滑移全曲线，分析最大粘结应力、延性等粘结性能随腐蚀时间及不同氯离子质量分数的时变规律，最后通过origin软件得到了-s拟合公式。
- 细骨料携带氯离子 /
- 长期暴露试验 /
- 抗压抗折强度 /
- 粘结性能 /
- 氯离子含量
Abstract: Firstly, the compressive and flexural strength of mortar with chloride ion permeating in sands during mixing investigated in 3, 5, 7, 14, 28, and 90 d.It is found that chloride ion permeating in sands will not improve the mortar strength of early stage, but reduce the corresponding strength, which is obviously different from the effect of chloride ion permeating in water.Then the bond performance of above mortar in 270, 360, 450, 630, 810, 1 050, 1 170, 1 320, and 1 440 d was studied based on 4 years long-term exposure experiments.The -s slipping curve with different content of chloride ion, the time-variant maximal bonding strength, also its tensility change rule are presented.Finally, the fitting formula of -s was gained by origin software.
- chloride ion permeating in sands /
- long-term exposure experiment /
- compressive and flexural strength /
- bond performance /
- content of chloride ion

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参考文献(9)

[2] 袁迎曙,贾福平,蔡跃.锈蚀钢筋混凝土的结构退化性能[J].土木工程学报,2001,34(3):47-52.

洪定海.沿海地区钢筋混凝土用海砂问题及对策[J].混凝土,2003,160(2):17-18.

[3] Zhang Xiaogang, Zhao Yangang, Lu Zhaohui. Probabilistic?Assessment of Reinforcing Steel Depassivation in Concrete Under?Aggressive Chloride Environments Based on Natural Exposure Data?[J]. Journal of Wuhan University of Technology: Material?Version,2011,26(1):126-131.

[4] 张平生,卢梅,李晓燕.锈损钢筋的力学性能[J].工业建筑,1995,25(9):41.

[5] Almusallam A A. Effect of Corrosion on the Properties of?Reinforcing Steel Bars[J]. Construction and Building Materials,2001,(5):361.

[6] Zhang Xiaogang, Zhao Yangang, Lu Zhaohui. Dynamic Corrosioninduced Cracking Process of RC Structures Considering the?Influence of Initial Defects[J]. Journal of Asian Architecture and?Building Engineering,2010,9(2):439-446.

[7] Fang Congqi, Lundgren K, Plos M, et al. Bond Behaviour of?Corroded Reinforcing Steel Bars in Concrete[J]. Cement and?Concrete Research,2006,36:1931-1938.

[8] Wang Xiaohui, Liu Xila. Modeling Bond Strength of Corroded?Reinforcement Without Stirrups [J]. Cement and Concrete?Research,2004,34:1331-1339.

[9] 邢锋,张小刚,霍元,等.砂浆中细骨料携带氯离子腐蚀机理与强度规律[J].建筑材料学报,2008,11(2):201-205.

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