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2012 (Vol. 4, Issue: 17)
Article Information:

Engineering Significant of Swelling Soils

Behzad Kalantari
Corresponding Author:  Behzad Kalantari 

Key words:  Active zone, atterberg limits, clay particles, colloid content, expansive soils, swell index,
Vol. 4 , (17): 2874-2878
Submitted Accepted Published
November 25, 2011 January 04, 2012 September 01, 2012
Abstract:

This study describes some of the most important swelling characters of expansive soils when used as foundation materials to support various types of civil engineering structures. Expansive soils are considered among difficult foundation materials and expand upon wetting and shrink upon losing moisture. They are considered problematic soils for architectural and civil engineers. These types of soils may cause minor to major structural damages to pavements as well as buildings. It is therefore essential to detect swelling soils from non-problematic foundation soils before any civil engineering projects are constructed over or adjacent to them. The study begins with definition of expansive soils and shows its distributions in the world as well as the basic causes for swelling potential that these type of soils poses. It is also shown that, the most probable depth of expansion to check for possible swelling potential for swelling soils is soilís active zone. This zone is the most upper depth of expansive soil and it may extend up to 20 ft. (6 m) below ground level. The moisture content of soil through active zone varies during different seasons while in lower part of expansive soil the moisture content stays constant during hot and cold season. Among various methods to check for swelling potential, plastic index and liquid limits are two most crucial factors, as these factors tend to increase, the swelling potential increase as well.
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  Cite this Reference:
Behzad Kalantari, 2012. Engineering Significant of Swelling Soils.  Research Journal of Applied Sciences, Engineering and Technology, 4(17): 2874-2878.
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