Appraisal of novel power-based extrusion methodology for consistency limits determinations of fine-grained soils
Citation:
O?Kelly B.C., Appraisal of novel power-based extrusion methodology for consistency limits determinations of fine-grained soils, Proceedings of the Civil Engineering Research in Ireland 2022 Conference, Dublin, Ireland, 25?26 Aug 2022, Holmes N., de Paor C. and West, R.P., 1, Civil Engineering Research Association of Ireland, 2022, 317 - 322Download Item:
2022_Appraisal of novel power-based extrusion methodology for consistency limits determinations of fine-grained soils_Proceedings of the CERI2022 Conference.pdf (Published (author's copy) - Peer Reviewed) 1.030Mb
Abstract:
The consistency limits (liquid limit LL and plastic limit PL) are among the most commonly performed tests in geotechnical engineering practice, being used for classification of fine-grained soils and in deducing other parameters (e.g., shear strength, permeability, compressibility), necessary for preliminary design/assessments, via numerous correlations built up over the decades. Depending on geographic region and/or referenced standard, the LL testing is performed using either the fall-cone or Casagrande (percussion-cup) approaches, while Atterberg’s PL is universally determined using the thread-rolling method. Because of its dependence on operator judgement regarding the crumbling condition during the rolling-out procedure, the accuracy of the PL test has been called into question by some researchers. This has prompted various alternative proposals, including undrained strength-based fall cone and extrusion approaches, but these are not appropriate for the determination of Atterberg’s PL which defines the water content at the plastic–brittle transition point (i.e., not strength-based). This paper presents the culmination of a two-year research project performed at Trinity College Dublin on the investigation and development of a novel power-based
extrusion methodology for determination of the consistency limits of fine-grained soils.
Author's Homepage:
http://people.tcd.ie/bokellyDescription:
PUBLISHEDThe full conference proceedings of CERI 2022 (including the mentioned paper by O'Kelly B.C.) can be downloaded free of charge via the following weblink: http://www.cerai.net/download/file/2573_ExOrdo-ceri2022-Version-15.pdf
Dublin, Ireland
Author: O'Kelly, Brendan
Other Titles:
Proceedings of the Civil Engineering Research in Ireland 2022 ConferencePublisher:
Civil Engineering Research Association of IrelandType of material:
Conference PaperSeries/Report no:
1Availability:
Full text availableKeywords:
Atterberg limits, Cohesive soil, Extrusion, Strength, WorkabilitySubject (TCD):
Smart & Sustainable Planet , Atterberg limits , EXTRUSION , GEOTECHNICAL ENGINEERING , Geotechnics , Plastic limit , SOIL , SOIL DEFORMATION , SOIL PARAMETERS , SOIL PROPERTIES , SOIL TYPE , STRENGTH AND TESTING OF MATERIALS , Soil Mechanics , Soil Mechanics & Foundations , TOUGHNESS , fine grained soil , geotechnical , liquid limit , shear strength , soil classification , soil plasticity , workabilityLicences: