• 责任者：Liu Rui (State Key Laboratory of Continental Dynamics ; Northwest University ; Xi’an 710069 ; China) ; Wang Jiading
• 刊名：Journal of Engineering Geology
• 出版年：2013
• 卷期：21(6)
• 关键词：膨胀土 ; expansive soil
• 页码：p.864-870
• 图表：5 illus., 2 tables, 15 refs.
• 分类号：1702
• issnNo：ISSN1004-9665
• isbnNo：CN11-3249/P

     lang="EN-US">This paper presents laboratory tests for lime as modifying agent in compaction of expansive soils. The ex- pansive soil samples are from the proposed airport location at An-Kang. The CSK-V1 multi-function electric com- paction instrument is used in laboratory for heavy compaction tests. A series of compaction characteristic tests are conducted. Findings are as follows ： （lang="EN-US"> 1 ）lang="EN-US"> As lime dosage increases, the maximum dry density decreases, and the op- timum water content increases. （lang="EN-US">2）lang="EN-US"> In the vicinity of the optimal water content, as lime dosage increases, the effect of water content on dry density decreases. （lang="EN-US">3）lang="EN-US"> The higher soil height, the smaller dry density in the condition of the same compaction work, lime dosage and water content. （lang="EN-US">4）lang="EN-US"> Maximum dry density tends to decrease steadily as braised material time increases, which changes little after 48h. （lang="EN-US">5）lang="EN-US"> The order of main influential factors of dry den- sity is water content, the materials humectation time and the excess soil height with the same kind of lime dosage. Finally, depending on the Scanning Electron Microscope （lang="EN-US">SEM）lang="EN-US">, the lime-treated expansive soil and compaction test are described and analyzed from the microscopic point of view.