Swell and shrinkage percentages for various soil types and their prediction from intrinsic soil properties
Joint Authors
Karim, Tariq H.
Yusuf, Haval H.
Muhammad, Ismail B.
Source
ZANCO Journal of Pure and Applied Sciences
Issue
Vol. 32, Issue 6 (31 Dec. 2020), pp.123-137, 15 p.
Publisher
Salahaddin University-Erbil Department of Scientific Publications
Publication Date
2020-12-31
Country of Publication
Iraq
No. of Pages
15
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Abstract EN
Earthwork construction involves excavation, hauling, placing and compaction of soil, gravel, and other materials that exist on the soil surface.
The soil volume varies depending whether the soil is bank, loose or compacted material.
Therefore, the final generated volume of earthwork should be adjusted for volume changes during the above states by applying shrinkage and swell- correction percentages.
Estimating these correction factors by engineering expertise or selecting predetermined tables without extensive knowledge of the local soils has proven to be costly and may be misleading.
Accordingly, the current study was initiated to develop the database of swell/ shrinkage percentages for various soil materials and link them to other soil properties.
Standard procedures were applied for determining soil density at different states along with the physical, chemical and geotechnical properties for soils obtained from 39 surveyed projects within and on the outskirts of Erbil city.
The obtained data were subjected to different statistical analysis and the results indicated that the swell percentage ranged from 36.10 -55.7% for clays, 18.40 – 69.20% for silts and 11.90 – 54.5% for gravels.
Shrinkage percentage ranged from 9.20 – 16.5% for clays, 4.40 – 20.20% for silts and 0.80 - 23.5% for gravel.
Overall, within each group, the swell percent was superior to the shrinkage percent.
Additionally, the swell percent was characterized by having a higher coefficient of variation compared to that of shrinkage percent.
The in situ soil density and clay content have emerged to be the most effective soil properties for predicting swell percent.
On the other hand, the influential variables for predicting shrinkage percent were in situ soil density and the maximum dry density.
The mean absolute error of prediction of swell and shrinkage percentages were 6.79 and 1.17 respectively, indicating that shrinkage percent can be predicted more accurately compared with swell percent.
American Psychological Association (APA)
Yusuf, Haval H.& Karim, Tariq H.& Muhammad, Ismail B.. 2020. Swell and shrinkage percentages for various soil types and their prediction from intrinsic soil properties. ZANCO Journal of Pure and Applied Sciences،Vol. 32, no. 6, pp.123-137.
https://search.emarefa.net/detail/BIM-1385579
Modern Language Association (MLA)
Yusuf, Haval H.…[et al.]. Swell and shrinkage percentages for various soil types and their prediction from intrinsic soil properties. ZANCO Journal of Pure and Applied Sciences Vol. 32, no. 6 (2020), pp.123-137.
https://search.emarefa.net/detail/BIM-1385579
American Medical Association (AMA)
Yusuf, Haval H.& Karim, Tariq H.& Muhammad, Ismail B.. Swell and shrinkage percentages for various soil types and their prediction from intrinsic soil properties. ZANCO Journal of Pure and Applied Sciences. 2020. Vol. 32, no. 6, pp.123-137.
https://search.emarefa.net/detail/BIM-1385579
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 136-137
Record ID
BIM-1385579