CARBONATION OF CONCRETE CONTAINING MINERAL ADMIXTURE IN NORMAL INDOOR ENVIRONMENT

摘要：

The carbonation depth of concrete containing mineral admixtureexposed in normalindoor environment after different moistly curing ages has been measured at different ages.The relationship among carbonation of concrete and several influencing factors,such asmoistly curing ages before carbonation,water-binder ratio,kinds of mineral admixture,flyash-slag mixing ratio and replacing proportions of mineral admixture have been discussed.The results showed that the carbonating depth of concrete increases along the prolongation ofexposing time during the initial exposing period but decreases after 6 months. Moistly curingage obviously influenced carbonation of concrete at early age. The shorter the moist curingtime is,the severer carbonation degree of concrete is; and the more the carbonating depthdecreases in later age. The continuous hydration of binder in the carbonated concrete insuitable environment,which could increase the amount of Ca(OH)2 in it,may be the reason ofcarbonation degree decrease in later age.

关键词： carbonation concrete containing mineral admixture normal indoor environment moist curing ages

作者: Yan Peiyu Jia Yaodong

作者单位: Key Laboratory of Structural Engineering and Vibration of China Education Ministry,School of Civil Engineering,Tsinghua University,Beijing,100084,PR China

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 216-222

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）