岩土力学2012，Vol.33Issue(1)：73-77,5.
掺灰膨胀土表面吸附试验及吸水性验证
Superficial adsorption experiment and water adsorption corroboration for lime modified expansive soils
摘要
Abstract
For the lime modified expansive soil, two series of tests are carried out. The first ones are water vapor adsorption tests, which are carried out using water vapor adsorption apparatus. The results indicate that with the increasing of lime percentage, the hydroscopicity of expansive soil decreased first then started to increase. And the minimum hydroscopicity is obtained at the point when the content of lime is 6%. In order to study the main reason causing the change of hydroscopicity, the second tests, I.e. The nitrogen adsorption tests, are performed on modified expansive soil. Analysis of the change of porous structure is made. It is found that with the increase of lime percentage, BET microporous specific surface area changes as the fold line; and the minimum value is obtained when the content of lime is 6%. With the increase of lime percentage, accumulating mesoporous volume decreased. With the increase of lime percentage, mesoporous diameter increases first, then decreases, and the maximum value is obtained when the content of lime is 6%. That the hydroscopicity of expansive soils is inversely proportional to the mesoporous diameter is summarized; and the optimal lime percentage is 6%.关键词
水蒸气吸附试验/氮气吸附试验/膨胀土/吸水性Key words
water vapor adsorption test/nitrogen adsorption test/expansive soils/hydroscopicity分类
建筑与水利引用本文复制引用
俞缙,王海,郑春婷,蔡燕燕,宋磊..掺灰膨胀土表面吸附试验及吸水性验证[J].岩土力学,2012,33(1):73-77,5.基金项目
国家自然科学基金项目(No.51109084) （No.51109084）
福建省自然科学基金项目(No.2011J01317) （No.2011J01317）
中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金项目(No.SKLGDUEK 1012) （No.SKLGDUEK 1012）
泉州市科技计划项目(No.2010Z8l) （No.2010Z8l）
华侨大学高层次引进人才科研启动金项目(No.11BS105). （No.11BS105）
