粉煤灰对混凝土碳化及氯离子侵蚀规律的影响  

Influence of Fly Ash Content on Carbonation and Chloride Corrosion in Concrete

作　　者：孙明 鲍麒 丁贵军 张鹏[1] 孙丛涛[4] SUN Ming;BAO Qi;DING Gui-jun;ZHANG Peng;SUN Cong-tao(School of Civil Engineering,Qingdao University of Technological University,Qingdao 266033,China;Naval Command College,Nanjing 210016,China;92690Force PLA,Sanya 572000,China;Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China)

机构地区：[1]青岛理工大学土木工程学院,青岛市266033 [2]海军指挥学院,南京市210016 [3]中国人民解放军92690部队,三亚市572000 [4]中国科学院海洋研究所,青岛市266071

出　　处：《公路》2021年第8期295-299,共5页Highway

基　　金：中国科学院战略性先导科技专项子课题,项目编号XDA13040402;应用基础研究项目,项目编号CHJ17J033。

摘　　要：采用氯盐浸泡与碳化交替方式,研究了氯盐侵蚀与碳化条件下粉煤灰掺量对混凝土碳化及氯离子侵蚀规律的影响。结果表明:随粉煤灰掺量的增加,混凝土表层(0~8mm)碳酸钙含量呈降低趋势,而在较深范围内(10~40mm)碳酸钙含量呈增大趋势;粉煤灰掺量的增加扩大了混凝土碳化深度;碳化条件下,随粉煤灰掺量的增加,混凝土表层氯离子含量增大,氯离子含量峰值向内迁移;在碳化影响范围内,随粉煤灰掺量的增加,混凝土结合氯离子含量呈降低趋势,而在未受碳化影响范围内,粉煤灰的掺入提高了混凝土结合氯离子含量。The influence of fly ash content on carbonation and chloride corrosion in concrete are studied by alternation of immersion and carbonation.The results show that the calcium carbonate content in the surface zone(0-8mm)of concrete decreases,but the calcium carbonate content in the deeper zone(10-40mm)increases with the increase of fly ash content.The carbonation depth of concrete increases with the increase of fly ash content.With the increase of fly ash content,the chloride content in the surface zone of concrete increases,and the depth of peak chloride content increases.The content of binding chloride in concrete decreases with the increase of fly ash content under the action of carbonation,while the content of binding chloride increases due to the addition of fly ash in the uncarbonated zone of concrete.

关 键 词：粉煤灰混凝土 氯盐侵蚀 碳化 碳酸钙 氯离子 

分 类 号：U414.01[交通运输工程—道路与铁道工程]