Small strain stiffness evolution of reconstituted medium density chalk

Greg Bialowas, Andrea Diambra, David Nash

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

3 Citations (Scopus)
86 Downloads (Pure)

Abstract

The mechanical behaviour of reconstituted chalk deposited has been investigated in a comprehensive experimental campaign using measurement and dynamic testing in the form of bender elements. Characterisation of the small strain shear stiffness (G0) of this material has been performed over a range of the isotropic stress levels and over-consolidation ratios. A variation of (G0) with current stress and overconsolidation ratio is, for the first time, proposed for this material. Following the widespread idea that the process of remoulding chalk may release calcium carbonate, which provides a cementing agent for grain contact overgrowth, the Gevolution at the constant stress state, over time, has been investigated for curing periods up to 23 days. Regardless of the previous stress path history prior to curing, an increase of the small strain shear stiffness with time was observed under a constant effective stress condition. This appeared to be partly associated with creep (or secondary) deformation but further increase was also observed when measurable creep deformations ceased.
Original languageEnglish
Title of host publication1st IMEKO TC-4 International Workshop on Metrology for Geotechnics
Subtitle of host publicationBenevento, Italy, March 17-18, 2016
PublisherIMEKO-International Measurement Federation Secretariat
Pages162-167
Number of pages6
ISBN (Print)9789299007501, 9781510822917
Publication statusPublished - 18 Mar 2016
Event1st IMEKO TC4 International Workshop on Metrology for Geotechnics, MetroGeotechnics 2016 - Benevento, Italy
Duration: 17 Mar 201618 Mar 2016

Conference

Conference1st IMEKO TC4 International Workshop on Metrology for Geotechnics, MetroGeotechnics 2016
CountryItaly
CityBenevento
Period17/03/1618/03/16

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