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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5227

Title: Use of the crumb test as a preliminary indicator of dispersive soils
Authors: Maharaj, A
Keywords: Dispersive soils
Crumb test
Soil mechanics
Geotechnical engineering
Issue Date: Jul-2011
Publisher: IOS Press
Citation: Maharaj, A. 2011. Use of the crumb test as a preliminary indicator of dispersive soils. 15th African Regional Conference on Soil Mechanics and Geotechnical Engineering, Maputo, Mozambique, 18-21 July 2011
Series/Report no.: Workflow request;7414
Abstract: Dispersive soils are prevalent in many areas around the world and the presence of these soils has always posed a serious problem on potential construction sites. The use of dispersive soils in hydraulic and other engineering structures such as roadway embankments can also lead to serious failures if the problem is not properly identified and addressed appropriately. Although the causes and consequences of dispersion are well understood, one of the main problems is the inability to positively identify such soils and thereby to reduce the potential for failure of many engineering structures. Many identification methods have been proposed but none has been completely successful. The primary test methods that are currently used for the identification of dispersive soils are the Pinhole Test; the SCS Double Hydrometer test; the crumb test and various chemical analyses of the soils with the crumb test being the most basic and unsophisticated test to perform. No single test and even the use of a combination of methods are reliable and it is possible that the reason lies in the actual testing procedures. A study involving the collection of various samples and execution of a single standard dispersive laboratory test, namely the crumb test, has identified some shortcomings. This paper discusses some of the various problems identified in the crumb test method and suggests some solutions to overcome them.
Description: 15th African Regional Conference on Soil Mechanics and Geotechnical Engineering, Maputo, Mozambique, 18-21 July 2011
URI: http://hdl.handle.net/10204/5227
ISBN: 978-1-60750-778-9-299
Appears in Collections:Infrastructure engineering
Rural infrastructure and services
General science, engineering & technology

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