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Unconfined compression strength of reinforced clays with carpet waste fibers

journal contribution
posted on 06.12.2017, 00:00 by Mehdi MirzababaeiMehdi Mirzababaei, M Miraftab, M Mohamed, P McMahon
This paper presents results of a comprehensive investigation on the utilization of carpet waste fibers in reinforcement of clay soils. Effects of adding proportionate quantities of two different types of shredded carpet waste fibers to clay soils (i.e., 1, 3, and 5% by dry weight of the soil) were investigated and evaluated. The investigation was conducted on specimens prepared at their maximum dry unit weight and optimum moisture content, as well on specimens prepared at variable conditions of dry unit weight and moisture content. A comparison was alsomade on specimens prepared at the same fiber content by changing dry unit weight while moisture content was kept unchanged or by changing both dry unit weight and moisture content. The investigation revealed that inclusion of carpet waste fibers into clay soils prepared at the same dry unit weight can significantly enhance the unconfined compression strength (UCS), reduce postpeak strength loss, and change the failure behavior from brittle to ductile. The results also showed that the relative benefit of fibers to increase the UCS of the clay soils is highly dependenton initial dry unit weight and moisture content of the soil. Failure patterns were gradually transformed from the apparent classical failure for unreinforced soil specimens to barrel-shaped failures for reinforced specimens at 5% fiber content.

History

Volume

139

Issue

3

Start Page

483

End Page

493

Number of Pages

11

eISSN

1943-5606

ISSN

1090-0241

Location

United STates

Publisher

American Society of Civil Engineers

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Not affiliated to a Research Institute; University of Bolton; University of Bradford;

Era Eligible

Yes

Journal

Journal of geotechnical and geoenvironmental engineering.