Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1051/e3sconf/202019502023 |
| Swelling Curve in Terms of Effective Stress for Expansive Clays | |
| Baltodano-Goulding, Rafael | |
| 通讯作者 | Baltodano-Goulding, R (corresponding author), Univ Costa Rica, Civil Engn Dept, LabUnsat, San Jose, Costa Rica. ; Baltodano-Goulding, R (corresponding author), Costa Rica Inst Technol, Construct Engn, San Jose, Costa Rica. |
| 会议名称 | 4th European Conference on Unsaturated Soils (E-UNSAT) |
| 会议日期 | OCT 19-21, 2020 |
| 会议地点 | Lisboa, PORTUGAL |
| 英文摘要 | Expansive soils can present an unsaturated state where the soil exhibits volume changes due to both moisture variations that change the state of stresses and moisture variations that interact with its mineralogical characteristics. These special kinds of soils are normally clay type soils that had suffered isomorphous substitution creating a charge imbalance of the clay mineral crystals. This imbalance promotes the trapping of water molecules by the clay particles. It is commonly assumed that a high plasticity index can be an indication of a clay's high swell potential. However, in arid regions, it is possible to have clays with very high swell potential and low plasticity indexes due primarily to a decrease in the state of effective stress, which will produce expansion of the material. It is common practice to study the swelling characteristics of these soils by performing free-swell tests that can be used for designing removal and replacement backfills or drilled shafts. However, the expansion percentage obtained from this type of test is actually in terms of total stresses and not in terms of effective stress, as it is commonly assumed. Moreover, it is highly dependent on the magnitude of the preload used. This paper presents some efforts made to obtain the swelling part of the curve in terms of effective stresses from the traditional free-swell test. It was hypothesized that the shape of this curve could either have the shape of the rebound curve from a saturated consolidation test or a shape similar to the soil-water characteristic curve. |
| 来源出版物 | 4TH EUROPEAN CONFERENCE ON UNSATURATED SOILS (E-UNSAT 2020) |
| ISSN | 2267-1242 |
| 出版年 | 2020 |
| 卷号 | 195 |
| 出版者 | E D P SCIENCES |
| 类型 | Proceedings Paper |
| 语种 | 英语 |
| 开放获取类型 | Green Published, gold |
| 收录类别 | CPCI-S |
| WOS记录号 | WOS:000659488200057 |
| WOS类目 | Engineering, Environmental ; Engineering, Civil ; Engineering, Geological ; Environmental Sciences |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| 资源类型 | 会议论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/353096 |
| 作者单位 | [Baltodano-Goulding, Rafael] Univ Costa Rica, Civil Engn Dept, LabUnsat, San Jose, Costa Rica; [Baltodano-Goulding, Rafael] Costa Rica Inst Technol, Construct Engn, San Jose, Costa Rica |
| 推荐引用方式 GB/T 7714 | Baltodano-Goulding, Rafael. Swelling Curve in Terms of Effective Stress for Expansive Clays[C]:E D P SCIENCES,2020. |
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