Some Studies on Desiccation Cracking of Fiber-Reinforced Expansive Clay Subjected to Drying and Wetting Cycles

Uma Chaduvula, Indupriya Manogaran, B. V.S. Viswanadham, Jayantha Kodikara

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

2 Citations (Scopus)

Abstract

A locally available expansive clay was reinforced with polypropylene fibers of cut-lengths 6, 12, and 18 mm and a fiber content of 0.5% by dry weight of the clay. The unreinforced and fiber-reinforced clay specimens mixed at a state close to liquid limit were subjected to five subsequent drying and wetting cycles. The desiccation tests were performed at a constant temperature and relative humidity. Crack propagation, moisture loss due to evaporation, and crack feature measurements were monitored. Digital image analysis (DIA) was used to measure the surfacial crack feature measurements. The results indicate that the desiccation cracking behavior was considerably affected by the subsequent drying and wetting cycles. The severity of cracks in unreinforced specimens increased with an increase in the number drying-wetting cycles and reached a stable value after three cycles. However, in the case of polypropylene fiber-reinforced clay specimens, bridging effect was predominant, and in turn integrity of soil matrix was maintained. The smaller crack widths and reduced cracked areas indicate the significant influence of discrete and randomly distributed fiber reinforcement in expansive clay layers.

Original languageEnglish
Title of host publicationGeotechnical Special Publication
Pages361-370
Number of pages10
Volume2017-November
EditionGSP 303
DOIs
Publication statusPublished - 1 Jan 2018
EventPan-American Conference on Unsaturated Soils 2017 - Dallas, United States of America
Duration: 12 Nov 201715 Nov 2017
Conference number: 2nd
https://ascelibrary.org/doi/book/10.1061/9780784481707 (Proceedings)

Publication series

NameGeotechnical Special Publication
ISSN (Print)0895-0563

Conference

ConferencePan-American Conference on Unsaturated Soils 2017
Abbreviated titlePanAm-UNSAT 2017
CountryUnited States of America
CityDallas
Period12/11/1715/11/17
Internet address

Cite this

Chaduvula, U., Manogaran, I., Viswanadham, B. V. S., & Kodikara, J. (2018). Some Studies on Desiccation Cracking of Fiber-Reinforced Expansive Clay Subjected to Drying and Wetting Cycles. In Geotechnical Special Publication (GSP 303 ed., Vol. 2017-November, pp. 361-370). (Geotechnical Special Publication). https://doi.org/10.1061/9780784481707.036