期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
A numerical test method of California bearing ratio on graded crushed rocks using particle flow modeling 被引量:2
1
作者 Yingjun Jiang Louis Ngai Yuen Wong Jiaolong Ren 《Journal of Traffic and Transportation Engineering(English Edition)》 2015年第2期107-115,共9页
In order to better understand the mechanical properties of graded crushed rocks (GCRs) and to optimize the relevant design, a numerical test method based on the particle flow modeling technique PFC2D is developed fo... In order to better understand the mechanical properties of graded crushed rocks (GCRs) and to optimize the relevant design, a numerical test method based on the particle flow modeling technique PFC2D is developed for the California bearing ratio (CBR) test on GGRs. The effects of different testing conditions and micro-mechanical parameters used in the model on the CBR numerical results have been systematically studied. The reliability of the numerical technique is verified. The numerical results suggest that the influences of the loading rate and Poisson's ratio on the CBR numerical test results are not significant. As such, a loading rate of 1.0-3.0 mm/min, a piston diameter of 5 cm, a specimen height of 15 cm and a specimen diameter of 15 cm are adopted for the CBR numerical test. The numerical results reveal that the GBR values increase with the friction coefficient at the contact and shear modulus of the rocks, while the influence of Poisson's ratio on the GBR values is insignificant. The close agreement between the CBR numerical results and experimental results suggests that the numerical simulation of the CBR values is promising to help assess the mechanical properties of GGRs and to optimize the grading design. Be- sides, the numerical study can provide useful insights on the mesoscopic mechanism. 展开更多
关键词 Graded crushed rocks Particle flow modeling california bearing ratio Numerical test Micro-mechanical parametersMesoscopic mechanism
原文传递
Geo-environmental application of municipal solid waste incinerator ash stabilized with cement
2
作者 Davinder Singh Arvind Kumar 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2017年第2期370-375,共6页
The behavior of soluble salts contained in the municipal solid waste incinerator(MSWI) ash significantly affects the strength development and hardening reaction when stabilized with cement.The present study focuses on... The behavior of soluble salts contained in the municipal solid waste incinerator(MSWI) ash significantly affects the strength development and hardening reaction when stabilized with cement.The present study focuses on the compaction and strength behavior of mixed specimens of cement and MSWI ash.A series of indices such as unconfined compressive strength,split tensile strength,California bearing ratio(CBR) and pH value was examined.Prior to this,the specimens were cured for 7 d,14 d,and 28 d.The test results depict that the maximum dry density(MDD) decreases and the optimum moisture content(OMC)increases with the addition of cement.The test results also reveal that the cement increases the strength of the mixed specimens.Thus,the combination of MSWI ash and cement can be used as a lightweight filling material in different structures like embankment and road construction. 展开更多
关键词 Municipal solid waste incinerator(MSWI) ASH CEMENT COMPACTION STABILIZATION california bearing ratio(CBR) test Geotechnical properties
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部