文献类型：期刊文献

英文题名：Compression Characteristics and Microscopic Mechanism of Coastal Soil Modified with Cement and Fly Ash

作者：Li, Na[1];Zhu, Qianying[1];Wang, Wei[1];Song, Fei[2];An, Dongliang[1];Yan, Haoran[1]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Tech Univ Catalonia UPC, Dept Civil & Environm Engn, Barcelona 08034, Spain

年份：2019

卷号：12

期号：19

外文期刊名：MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000493308500131)、、EI(收录号：20194307578246)、Scopus(收录号：2-s2.0-85073761785)、WOS

基金：This research was funded by the National Natural Science Foundation of China (Grant numbers [41772311]), the Zhejiang Provincial Natural Science Foundation of China (Grant number [LY17E080016]), the Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Science (Grant number [Z017013]), the Scientific Research Projects of Zhejiang Department of Housing and Urban and Rural Construction (Grant number [2017K179]), and the International Scientific and Technological Cooperation Projects of Shaoxing University (Grant number [2019LGGH1007]).

语种：英文

外文关键词：soft soil; fly ash; cement soil; compression characteristics; microscopic mechanism

外文摘要：It is of great significance to study the consolidation characteristics of modified coastal cement-soil. A one-dimensional consolidation test and microscopic test were carried out. In the tests, the cement content was 20%, fly ash content was 0%, 5%, 10%, 20%, and 30%, and the water content was 80%. The consolidation test results showed that: (1) Compared with coastal cement soil, the deformation of coastal cement soil modified with a 20% fly ash content was reduced from 4.31 to 2.70 mm, and the vertical compression deformation was reduced by 1.61 mm. (2) During consolidation and compression, the e-p curve (pore ratio-pressure curve) of fly ash-modified coastal cement soil was slower than that of coastal cement soil and the rate of change of pore ratio. (3) The compression coefficient of fly ash-modified coastal cement soil was reduced from 0.780 to 0.598 MPa-1 compared with that of coastal cement soil. The microscopic test results indicate that after adding the proper amount of fly ash, a skeleton was formed between the microscopic particles of the sample, which improved its resistance to compression and deformation. The results of this study indicate that it is feasible to modify coastal cement soil with an appropriate amount of fly ash to improve its compression resistance.