摘要
为研究不同年代青砖的等温吸湿特性差异对历史建筑中冻融、酥碱及微生物繁殖等与水分相关劣化现象的影响,使用恒温条件下配置的饱和盐水溶液控制相对湿度恒定,测定了温州谯楼遗址中分别于唐末五代、元末明初、20世纪70年代和现代生产的4类青砖的等温吸湿曲线,比较了不同年代青砖的等温吸湿特性差异.结果表明,在相对湿度为11%~97%的条件下,4类青砖平衡吸湿量的平均值变化范围分别为2.2~10.5、8.3~77.5、2.3~19.3和1.0~3.7 g/kg,其中元末明初青砖的等温吸湿能力最大,然后依次为20世纪70年代、唐末五代,现代青砖最小.在环境相对湿度变动下,元末明初青砖的含湿量波动也远大于其他3类青砖.实验结果为历史建筑砖体的热湿耦合及劣化机制研究提供了数据参考,也为中国砖构历史建筑保护工作的改进提供了更充分的依据.
To study the influences of the difference in isothermal sorption properties of gray bricks in different ages on water related deterioration of historical buildings, such as freezing and thawing, efflorescing and microbial reproduction, the saturated salt-water solution under isothermal conditions was used to control the relative humidity constant. The isothermal sorption curves of 4 types of gray bricks were measured produced by Wenzhou Qiaolou site(Zhejiang Province, China) in the late Tang Dynasty and Five Dynasties, the late Yuan Dynasty and early Ming Dynasty, the 1970 s and the modern era. And the differences in isothermal sorption properties of bricks in different ages were compared. The results show that under the condition that the relative humidity is 11% to 97%, the average value of the equilibrium moisture content of the 4 types of gray bricks varies from 2.2 to 10.5, 8.3 to 77.5, 2.3 to 19.3, and 1.0 to 3.7 g/kg, respectively. The comparison shows that the isothermal hygroscopicity of the gray brick in the late Yuan Dynasty and early Ming Dynasty is the highest, followed by the 1970 s, the late Tang Dynasty and Five Dynasties, and the lowest in the modern era. Under the changing condition of relative humidity, the fluctuation of moisture content of the gray bricks in the late Yuan Dynasty and early Ming Dynasty is much larger than that of the other three types of gray bricks. The experimental results provide reference data for studying the coupling hygrothermal effect and degradation mechanism of historical building bricks, and a more sufficient basis for the improvement of protecting historical brick building in China.
作者
李永辉
蔡宜可
谢华荣
张杰
Li Yonghui;Cai Yike;Xie Huarong;Zhang Jie(School of Architecture,Southeast University,Nanjing 210096,China;Key Laboratory of Urban and Architectural Heritage Conservation of Ministry of Education,Southeast University,Nanjing 210096,China;Graduate School of Engineering,Kyoto University,Kyoto 6158540,Japan;Wenzhou Historic City Construction Investment Group Co.,Ltd.,Wenzhou 325088,China)
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第2期327-333,共7页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金面上资助项目(51878140)
江苏省自然科学基金面上资助项目(BK20161424).
关键词
遗产保护
建筑物理
热湿耦合
等温吸湿曲线
青砖
温州谯楼
heritage conservation
building physics
coupling hygrothermal effect
isothermal sorption curves
gray bricks
Wenzhou Qiaolou(China)
