EFFECT OF STATIC AND FATIGUE LOADING ON CARBONATION RESISTANCE OF UNDERGROUND STRUCTURE CONCRETE

摘要：

　　Underground structure usually suffers much more complex service environment than any other concrete structures.Due to the internal forces of the structure and vibration of urban rail transit, underground structure concrete is under static and fatigue loading during entire service life.Furthermore, the temperature and humidity in underground structure is exactly beneficial to carbonation reaction which is one of common deterioration mechanisms leading to degradation of concrete.And the degradation will usually speed up under combined action of carbonation and loading.In this paper, effect of static and fatigue loading on carbonation resistance of underground structure concrete is discussed.Accelerated carbonation tests coupling with static loading and fatigue loading are described respectively.Then carbonation depth and pH value of concrete are summarized at different carbonation age and under different loading condition.Finally, possible reasons for change regularity of carbonation depth and pH value are analysed.

关键词： underground structure concrete accelerate carbonation static loading fatigue loading carbonation depth pH value

作者: Yu Liang Weiqing Liu Shuguang Wang Jiande Han

作者单位: College of Civil Engineering, Nanjing Tech University, Nanjing, China

会议类型: 国际会议

会议名称: The 3rd International Conference on Service Life Design for Infrastructure(2014第三届基础设施服役寿命设计国际会议)

会议地点: 珠海

会议语种:英文

页码: 217-227

在线出版日期: 2014-10-15（万方平台首次上网日期，不代表论文的发表时间）