Effect of Initial Water Content on the Properties of Compacted Expansive Unsaturated Soil
Unsaturated soil can raise many geotechnical problems upon wetting and drying resulting in swelling upon wetting and collapsing (shrinkage) in drying and changing in the soil shear strength. The classical principles of saturated soil are often not suitable in explaining these phenomena. In this stud...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Baghdad
2015-03-01
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| Series: | Journal of Engineering |
| Online Access: | https://www.jcoeng.edu.iq/index.php/main/article/view/457/391 |
| _version_ | 1797709724494331904 |
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| author | Mohammed Yousif Fattah Aysar Hassan Al-Lami Mahmood D. Ahmed |
| author_facet | Mohammed Yousif Fattah Aysar Hassan Al-Lami Mahmood D. Ahmed |
| author_sort | Mohammed Yousif Fattah |
| collection | DOAJ |
| description | Unsaturated soil can raise many geotechnical problems upon wetting and drying resulting in swelling upon wetting and collapsing (shrinkage) in drying and changing in the soil shear strength. The classical principles of saturated soil are often not suitable in explaining these phenomena. In this study, expansive soil (bentonite and sand) were tested in different water contents and dry unit weight chosen from the compaction curve to examine the effect of water content change on soil properties (swelling pressure, expansion index, shear strength (soil cohesion) and soil suction by the filter paper method). The physical properties of these soils were studied by conducting series of tests in laboratory. Fitting methods were applied to obtain the whole curve of the SWRC measured by the filter paper method with the aid of the (Soil Vision) program. The study reveals that the initial soil conditions (water content and dry unit weight) affect the soil cohesion, soil suction and soil swelling, where all these parameters marginally decrease with the increase in soil water content especially on the wet side of optimum. |
| first_indexed | 2024-03-12T06:42:01Z |
| format | Article |
| id | doaj.art-2bf1be2be1214db1bea17bc532d5aba9 |
| institution | Directory Open Access Journal |
| issn | 1726-4073 2520-3339 |
| language | English |
| last_indexed | 2024-03-12T06:42:01Z |
| publishDate | 2015-03-01 |
| publisher | University of Baghdad |
| record_format | Article |
| series | Journal of Engineering |
| spelling | doaj.art-2bf1be2be1214db1bea17bc532d5aba92023-09-03T00:55:57ZengUniversity of BaghdadJournal of Engineering1726-40732520-33392015-03-0121393108Effect of Initial Water Content on the Properties of Compacted Expansive Unsaturated SoilMohammed Yousif FattahAysar Hassan Al-LamiMahmood D. AhmedUnsaturated soil can raise many geotechnical problems upon wetting and drying resulting in swelling upon wetting and collapsing (shrinkage) in drying and changing in the soil shear strength. The classical principles of saturated soil are often not suitable in explaining these phenomena. In this study, expansive soil (bentonite and sand) were tested in different water contents and dry unit weight chosen from the compaction curve to examine the effect of water content change on soil properties (swelling pressure, expansion index, shear strength (soil cohesion) and soil suction by the filter paper method). The physical properties of these soils were studied by conducting series of tests in laboratory. Fitting methods were applied to obtain the whole curve of the SWRC measured by the filter paper method with the aid of the (Soil Vision) program. The study reveals that the initial soil conditions (water content and dry unit weight) affect the soil cohesion, soil suction and soil swelling, where all these parameters marginally decrease with the increase in soil water content especially on the wet side of optimum.https://www.jcoeng.edu.iq/index.php/main/article/view/457/391 |
| spellingShingle | Mohammed Yousif Fattah Aysar Hassan Al-Lami Mahmood D. Ahmed Effect of Initial Water Content on the Properties of Compacted Expansive Unsaturated Soil Journal of Engineering |
| title | Effect of Initial Water Content on the Properties of Compacted Expansive Unsaturated Soil |
| title_full | Effect of Initial Water Content on the Properties of Compacted Expansive Unsaturated Soil |
| title_fullStr | Effect of Initial Water Content on the Properties of Compacted Expansive Unsaturated Soil |
| title_full_unstemmed | Effect of Initial Water Content on the Properties of Compacted Expansive Unsaturated Soil |
| title_short | Effect of Initial Water Content on the Properties of Compacted Expansive Unsaturated Soil |
| title_sort | effect of initial water content on the properties of compacted expansive unsaturated soil |
| url | https://www.jcoeng.edu.iq/index.php/main/article/view/457/391 |
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