Effect of percentage of low plastic fines on the unsaturated shear strength of compacted gravel soil
Low plastic fines in gravel soils affect its unsaturated shear strength due to the contribution of matric suction that arises in micro and macro pores found within and between aggregates. The shear strength of five different types of prepared gravel soils is measured and is compared with a theoretic...
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2015-06-01
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Online Access: | http://www.sciencedirect.com/science/article/pii/S2090447914001506 |
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doaj-4add5e363b7f431ea14c7b87b691e3a52021-06-02T05:13:58ZengElsevierAin Shams Engineering Journal2090-44792015-06-016241341910.1016/j.asej.2014.10.012Effect of percentage of low plastic fines on the unsaturated shear strength of compacted gravel soilKamal Mohamed Hafez Ismail IbrahimLow plastic fines in gravel soils affect its unsaturated shear strength due to the contribution of matric suction that arises in micro and macro pores found within and between aggregates. The shear strength of five different types of prepared gravel soils is measured and is compared with a theoretical model (Fredlund et al., 1978) to predict the unsaturated shear strength. The results are consistent to a great extent except the case of dry clayey gravel soil. It is also found that on inundation of gravel soils containing plastic fines greater than 12% a considerable reduction in both the strength and the stiffness modulus is noticed. This 12% percentage is close to the accepted 15% percentage of fines given by ASTM D4318 (American society for testing material). The angle of internal friction that arises due to matric suction decreases with the increase of degree of saturation of soil. The hysteresis of some tested gravel soils is measured and found that it increases by increasing the percentage of fines.http://www.sciencedirect.com/science/article/pii/S2090447914001506Gravel soilUnsaturated shear strengthSoil water characteristic curveHysteresisFines and soil plasticity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Kamal Mohamed Hafez Ismail Ibrahim |
spellingShingle |
Kamal Mohamed Hafez Ismail Ibrahim Effect of percentage of low plastic fines on the unsaturated shear strength of compacted gravel soil Ain Shams Engineering Journal Gravel soil Unsaturated shear strength Soil water characteristic curve Hysteresis Fines and soil plasticity |
author_facet |
Kamal Mohamed Hafez Ismail Ibrahim |
author_sort |
Kamal Mohamed Hafez Ismail Ibrahim |
title |
Effect of percentage of low plastic fines on the unsaturated shear strength of compacted gravel soil |
title_short |
Effect of percentage of low plastic fines on the unsaturated shear strength of compacted gravel soil |
title_full |
Effect of percentage of low plastic fines on the unsaturated shear strength of compacted gravel soil |
title_fullStr |
Effect of percentage of low plastic fines on the unsaturated shear strength of compacted gravel soil |
title_full_unstemmed |
Effect of percentage of low plastic fines on the unsaturated shear strength of compacted gravel soil |
title_sort |
effect of percentage of low plastic fines on the unsaturated shear strength of compacted gravel soil |
publisher |
Elsevier |
series |
Ain Shams Engineering Journal |
issn |
2090-4479 |
publishDate |
2015-06-01 |
description |
Low plastic fines in gravel soils affect its unsaturated shear strength due to the contribution of matric suction that arises in micro and macro pores found within and between aggregates. The shear strength of five different types of prepared gravel soils is measured and is compared with a theoretical model (Fredlund et al., 1978) to predict the unsaturated shear strength. The results are consistent to a great extent except the case of dry clayey gravel soil. It is also found that on inundation of gravel soils containing plastic fines greater than 12% a considerable reduction in both the strength and the stiffness modulus is noticed. This 12% percentage is close to the accepted 15% percentage of fines given by ASTM D4318 (American society for testing material). The angle of internal friction that arises due to matric suction decreases with the increase of degree of saturation of soil. The hysteresis of some tested gravel soils is measured and found that it increases by increasing the percentage of fines. |
topic |
Gravel soil Unsaturated shear strength Soil water characteristic curve Hysteresis Fines and soil plasticity |
url |
http://www.sciencedirect.com/science/article/pii/S2090447914001506 |
work_keys_str_mv |
AT kamalmohamedhafezismailibrahim effectofpercentageoflowplasticfinesontheunsaturatedshearstrengthofcompactedgravelsoil |
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1721408155296989184 |