[1]涂永明,吕志涛.应力状态下混凝土的碳化试验研究[J].东南大学学报(自然科学版),2003,33(5):573-576.[doi:10.3969/j.issn.1001-0505.2003.05.008]
 Tu Yongming,Lü Zhitao.Experiment and research of presteressed concrete structure in carbonation corrosive environments[J].Journal of Southeast University (Natural Science Edition),2003,33(5):573-576.[doi:10.3969/j.issn.1001-0505.2003.05.008]
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应力状态下混凝土的碳化试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
33
期数:
2003年第5期
页码:
573-576
栏目:
土木工程
出版日期:
2003-09-20

文章信息/Info

Title:
Experiment and research of presteressed concrete structure in carbonation corrosive environments
作者:
涂永明 吕志涛
东南大学混凝土与预应力混凝土结构教育部重点实验室, 南京 210096
Author(s):
Tu Yongming Lü Zhitao
Key Lab of RC & PC Structures of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
预应力混凝土结构 耐久性 应力 碳化 腐蚀
Keywords:
prestressed concrete structure durability stress carbonation corrosion
分类号:
TU37
DOI:
10.3969/j.issn.1001-0505.2003.05.008
摘要:
进行了碳化环境下预应力混凝土试件的耐久性试验研究,阐述了在应力和碳化共同作用下的混凝土结构破损机理及规律.试件为无应力、弯曲受拉和直接受压的应力状态,采用加速碳化的试验方案.分别引进kwcχσ反映碳化深度与混凝土质量、强度和应力水平的关系,建立了应力状态下的混凝土碳化深度的多因素预测模型.结果表明:拉、压应力分别加快和减缓了混凝土的碳化速率,且应力越大; 碳化速率的改变越大; χσ可以反映碳化速率的变化趋势.施加预应力能够控制混凝土裂缝的发展、消除或限制裂缝的宽度,因此,预应力混凝土结构的耐久性比普通混凝土结构的耐久性更好.
Abstract:
The durability experiments of prestressed concrete specimens in carbonation corrosive environments were carried out. The corrosion mechanism of concrete under the coactions of stress and carbonation corrosion was discussed. The specimens were categorized into three types: non-stressed, bend-tensile stress and compressive stress. Carbonation of the specimens was accelerated. A multi-factor model forecasting the carbonation depth of prestressed concrete was constructed, introducing kwc and χσ, which describe the relationships between carbonation depth and concrete quality or strength or stress levels. The results show that the tensile stress and compressive stress are able to accelerate or slow down the concrete carbonation, respectively, and the larger the changes in stresses, the larger the changes in carbonation degrees. χσ reflects the changes well. The compressive stress can control the development of concrete cracks, and eliminate the crack width, so the durability of the prestressed concrete structure is better than that of an ordinary concrete structure.

参考文献/References:

[1] 中华人民共和国建设部.GBJ82—85普通混凝土长期性能和耐久性试验方法[S].北京:中国建筑工业出版社,1985.
[2] 张誉,蒋利学.基于碳化机理的混凝土碳化深度实用数学模型[J].工业建筑,1998,28(8):16-19.
  Zhang Yu,Jiang Lixue.Practical mathematical model of carbonation depth of concrete based on the mechanism of carbonation [J]. Industrial Construction, 1998,28(8):16-19.(in Chinese)
[3] 牛荻涛,董振平,浦聿修.预测混凝土碳化深度的随机模型[J].工业建筑,1999,29(9):41-45.
  Niu Ditao,Dong Zhenping,Jin Yuxiu.Stochastic model for forecasting carbonation depth [J]. Industrial Construction,1999,29(9):41-45.(in Chinese)
[4] Raupauch Michael,Schiessl Peter.Monitoring system for the penetration of chlorides,carbonation and the corrosion risk for reinforcement [J]. Construction and Building Materials,1997(4):207-214.

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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(59978008).
作者简介: 涂永明(1978—),男,博士生; 吕志涛(联系人),教授,博士生导师,中国工程院院士,luzhitao@seu.edu.cn.
更新日期/Last Update: 2003-09-20