岩土力学2011，Vol.32Issue(8)：2267-2273,7.
干旱区土建筑遗址冻融耐久性研究
Durability of earthen architecture ruins under cyclic freezing and thawing
摘要
Abstract
Earthen architecture ruins is mostly found in the arid area, which suffers from strong wind erosion, freeze-thaw process. Influence of cyclic freezing-thawing on the durability of earthen architecture are researched. Cyclic freezing-thawing are conducted on the undisturbed and remolded specimens from Jiaohe cultural heritage, Xinjiang, China to understand the durability of earthen architecture to wind erosion and the strength attenuation. Test results show, under low original water content, the undisturbed and remolded specimens masses are increased during the beginning five freezing-thawing cycles. With the change of moisture content during the freezing and thawing process, undisturbed specimen weight expresses a decreasing tendency; and remolded specimens weight maintains a level of weight With the increasing of freezing-thawing cycles, undisturbed specimens show a decrease in compressive strength and an increase in wind erosion quantity due to microstructure damage; that is, a weakening in durability. However, the remolded specimens exhibit an enhancement of microstructures at beginning cycles, characterized by an increase in strength and a decrease in wind erosion, that is, an improvement in durability. It is considered the healing effect of destroyed microstructure and the aging of chemical cohesive agents are responsible for the strengthening of remolded specimen at the earlier freezing-thawing cycles. At the further freezing-thawing cycles, the remolded specimens turn to exhibit a decreasing tendency on durability following the increasing damage of microstructure.关键词
土建筑遗址/冻融循环/风蚀/耐久性Key words
earthen architecture ruins/ cyclic freezing and thawing/ wind erosion/ durability分类
建筑与水利引用本文复制引用
严耿升,张虎元,王晓东,杨博,李敏..干旱区土建筑遗址冻融耐久性研究[J].岩土力学,2011,32(8):2267-2273,7.基金项目
国家科技支撑计划课题资助项目(No.2006BAK30B02). （No.2006BAK30B02）
