Impact of clay on early jet grouting strength

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dc.contributor.author Laefer, Debra F.
dc.contributor.author O'Neill, Daire
dc.contributor.author O'Mahony, Cian
dc.date.accessioned 2010-08-23T15:44:30Z
dc.date.available 2010-08-23T15:44:30Z
dc.date.copyright 2009 DFI en
dc.date.issued 2009-10
dc.identifier.uri http://hdl.handle.net/10197/2420
dc.description DFI 34th Annual Conference on Deep Foundations, October 20-23 2009, Kansas City en
dc.description.abstract Jet grouting is a ground improvement technique that has become widely adopted over the past three decades, yet relatively little data has been published about performance characteristics of mixes under adverse conditions, such as the inclusion of clay lenses. This paper presents an experimental investigation on the impact of clay on the strength of jet grouting. A total of 150 grout samples were subjected to 0-10% levels of Kaolinite and Bentonite inclusion. While the Bentonite was introduced as a pre-hydrated slurry, the Kaolinite was mixed in two ways: in a pulverized condition and as large chunks. Sample strength and stiffness were measured at multiple dates within the first 28 days. With 10% clay inclusion all samples exhibited significant strength and stiffness losses. With some, substantial losses began with as little as 4% clay inclusion. Even a 1% clay inclusion tended to decrease strength and stiffness between one-quarter and onethird of the control sample. Depending upon clay type and inclusion method, results differed significantly with respect to strength and stiffness development and failure mechanism. Petrographic analysis was used to provide further insights as to apparently divergent behaviors. en
dc.description.sponsorship Not applicable en
dc.format.extent 3462231 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher DFI en
dc.relation.ispartof DFI Proceedings of the 34th Annual Conference on Deep Foundations, 2009 en
dc.relation.requires Critical Infrastructure Group Research Collection en
dc.relation.requires Urban Institute Ireland Research Collection en
dc.subject Jet grouting en
dc.subject Ground improvement en
dc.subject Clay en
dc.subject Strength en
dc.subject.lcsh Grouting--Testing en
dc.subject.lcsh Clay en
dc.subject.lcsh Soil stabilization en
dc.title Impact of clay on early jet grouting strength en
dc.type Conference Publication en
dc.internal.availability Full text available en
dc.internal.webversions Publisher's version en
dc.internal.webversions http://www.dfi.org/pubdetail.asp?id=1699 en
dc.status Peer reviewed en
dc.neeo.contributor Laefer|Debra F.|aut| en
dc.neeo.contributor O'Neill|Daire|aut| en
dc.neeo.contributor O'Mahony|Cian|aut| en
dc.description.admin Conference website n/a. Organiser's website - http://www.dfi.org/conferences.asp. Link to publisher version - http://www.dfi.org/pubdetail.asp?id=1699. DG 19/07/10 au, ti, pu, ke OR 20/8/10 en


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