CRYO-DAMAGE OF CEMENTITIOUS MATERIALS SUBJECT TO DIFFERENT FREEZING RATES

摘要：

The influence of freezing rate on the cryo-damage of cementitious materials isinvestigated experimentally in this paper. Saturated,dried and air-entrained mortar specimensare prepared and tested for their basic mechanical properties and pore distributions viamercury intrusion porosimetry (MIP). Then,the specimens are subject to laboratory freeze-thaw cycles under three freezing rates and moisture exchange environment is avoidedbetween environment and specimens. The measurement is effectuated for freezing expansion,residual deformation of the specimens in each freeze-thaw cycle. With cryo-damagerepresented by the residual expansion of material after each cycle,it is observed that highfreezing rate does augment freezing expansion of material while the cryo-damage is moreimportant for low freezing rate.

关键词： Freeze-thaw Cryo-damage Freezing rate Cementitious material

作者: Kefei LI Qiang ZENG

作者单位: Key Laboratory of Structural Engineering and Vibration of China Education Ministry,Civil Engineering Department,Tsinghua University,Beijing,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: 1160-1165

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）