Abstract
The collapse of soils under wetting is a major problem in Geotechnical engineering. The erection of structures on these types of soils, located in arid and semi-arid zones, needs careful treatment of these soils. Soil reinforcement techniques have been rapidly increased during these two decades because of their effectiveness in geotechnical engineering. The aim of this experimental work is to investigate the collapsible soil behaviour in order to improve its characteristics. To achieve this goal, Polyethylene fibers, and Sisal fibers were used as Polyethylene fibers content in mass are varied from 0% (unreinforced samples) to 15%; and Sisal fibers content from 0.5% to 1%. The fiber reinforcement is combined with other processing procedures such as compaction and the addition of CPA cement to decrease the collapse potential.
Highlights
Construction of buildings and other civil engineering structures on collapsible soils is highly risky because such soils are susceptible to settle suddenly when are loaded and wetted
This paper describes a study of the mechanical behaviour of Kaolinite-sand mixed samples reinforced with randomly distributed polyethylene fibers, and Sisal fibers under oedometer loading conditions
The Oedometer is a laboratory apparatus used in geotechnical engineering
Summary
Construction of buildings and other civil engineering structures on collapsible soils is highly risky because such soils are susceptible to settle suddenly when are loaded and wetted. This paper describes a study of the mechanical behaviour of Kaolinite-sand mixed samples reinforced with randomly distributed polyethylene fibers, and Sisal fibers under oedometer loading conditions. In order to reduce the quantity of plastic bottles, we undertake this study based on the use of this material to treat the collapsible soil. This is in order to protect the environment and to address this type of soil problems by finding economic solutions. The objective of this paper is to determine the effect of randomly distributed short polyethylene-fiber, and Sisal fibers, respectively, on the collapse behaviour of a clayey sand material. For each content three different lengths were used (5 mm, 10mm and 25 mm respectively), and 0.5%, 1% (5mm, 10mm and 25mm long) for Sisal fibers
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