Behavior of expansive soils stabilized with fly ash |
| |
| Authors: | Fusheng Zha Songyu Liu Yanjun Du Kerui Cui |
| |
| Institution: | (1) School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui Province, 230009, China;(2) Institute of Geotechnical Engineering, Southeast University, Nanjing, Jiangsu, 210096, China |
| |
| Abstract: | Expansive soils cause serious problem in the civil engineering practice due to swell and shrinkage upon wetting and drying.
Disposal of fly ash, which is an industrial waste in both cost-effective and environment-friendly way receives high attention
in China. In this study, the potential use and the effectiveness of expansive soils stabilization using fly ash and fly ash-lime
as admixtures are evaluated. The test results show that the plasticity index, activity, free swell, swell potential, swelling
pressure, and axial shrinkage percent decreased with an increase in fly ash or fly ash-lime content. With the increase of
the curing time for the treated soil, the swell potential and swelling pressure decreased. Soils immediately treated with
fly ash show no significant change in the unconfined compressive strength. However, after 7 days curing of the fly ash treated
soils, the unconfined compressive strength increased significantly. The relationship between the plasticity index and swell-shrinkage
properties for pre-treated and post-treated soils is discussed. |
| |
| Keywords: | Expansive soil Fly ash Lime Swell-shrinkage properties Unconfined compressive strength Plasticity index ratio |
| 本文献已被 SpringerLink 等数据库收录！ |
|
