Salt Hazard of Earthen Monuments Induced by Capillary Rise

摘要：

Re-distribution and re-crystallization of the soluble salts by capillary water migration in ancient earthen structures results in salt efflorescence which is characterized by granular disaggregation and crumbling.Laboratory capillary water rise tests were conducted on compacted silt soil from ancient Jiaohe Ruins in Xinjiang,China to clarify the responsibility of salts in damage of earthen monuments.Distribution of water contents,pH,electric conductivity and soluble salts of soil liquid after capillary tests illustrated that NaCl accumulation is predominant at the capillary fringe while Na2SO4 at the other capillary front area.Within the capillary rise area along the water migration direction,less soluble,moderately soluble and most soluble salts tend to crystallize out and result in salt crest,salt efflorescence and dark appearance in correspondence.

关键词： Earthen monuments salt hazard capillary action soluble salts

作者: ZHANG Huyuan YAN Ling WANG Jinfang

作者单位: Key Laboratory of Mechanics on Disaster and Environment in Western China Lanzhou University,Ministry Key Laboratory of Western Chinas Environmental Systems Lanzhou University,Ministry of Education,Lan

会议类型: 国际会议

会议名称: 2008古遗址保护国际学术讨论会暨国际岩石力学学会区域研讨会(International Symposium Conservation of Ancient Sites 2008 & ISRM-Sponsored Regional Symposium)

会议地点: 甘肃敦煌

会议语种:英文

页码: 116-122

在线出版日期: 2008-09-22（万方平台首次上网日期，不代表论文的发表时间）