302214db-a164-0a1b-e063-3050940a6602 English dataset British Geological Survey +44 115 936 3100 Environmental Science Centre,Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-05-03 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13608391 OSGB 1936 / British National Grid (EPSG::27700) WGS 84 (EPSG::4326) Triaxial compressive strength data of tests conducted at varying strain rates and confining pressures on salt samples from the Northwich Halite Member 2025-03-10 creation http://data.bgs.ac.uk/id/dataHolding/13608391 The dataset contains triaxial compressive strength data of salt samples collected from the Northwich Halite Member at the Winsford Mine in Cheshire, UK. Each sample was subjected to varying strain or displacement-equivalent rates under conventional triaxial stress conditions to evaluate its mechanical response to different loading conditions. The experiments were conducted over two testing campaigns between July 2022 and August 2023, using a servo-controlled stiff load frame in the Rock Mechanics and Physics Laboratory at the British Geological Survey, Keyworth, UK. The dataset is organized into individual Microsoft Excel files, each corresponding to a single test and containing parameters such as time, force, stress, displacement, and strain. A summary file detailing sample characteristics and test conditions is also included. Nathaniel D Forbes Inskip Heriot-Watt University not available originator Enquiries British Geological Survey 0115 936 3143 0115 936 3276 Environmental Science Centre, Nicker Hill, Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk distributor Enquiries British Geological Survey 0115 936 3143 0115 936 3276 Environmental Science Centre, Nicker Hill, Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk originator Enquiries British Geological Survey United Kingdom not available distributor Enquiries British Geological Survey United Kingdom not available pointOfContact notPlanned https://resources.bgs.ac.uk/images/geonetworkThumbs/302214db-a164-0a1b-e063-3050940a6602.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Salt Compressive strength Physical properties Elastic theory Compression tests Halite BGS Thesaurus of Geosciences 2022 revision UK Location (INSPIRE) NGDC Deposited Data Citable Data dataCentre NERC_DDC otherRestrictions licenceOGL Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" otherRestrictions The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused. Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" vector English geoscientificInformation British Geological Survey Gazetteer: OS Boundary Line 2009 revision Cheshire County [id=12343] -2.5200 -2.5100 53.2000 53.2100 2022-06-21 2023-08-16 Microsoft Word (DOCX) witheld Comma-separated values (CSV) witheld Adobe Acrobat document (PDF) witheld Enquiries British Geological Survey 0115 936 3143 0115 936 3276 Environmental Science Centre, Nicker Hill, Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk distributor Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item187103 WWW:DOWNLOAD-1.0-http--download Data download https://doi.org/10.5285/cd703497-68f5-4d52-a353-3eef0ff62b3e WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) Valdez II, R., Forbes Inskip, N. D., Ougier-Simonin, A. (2025). Triaxial compressive strength data of tests conducted at varying strain rates and confining pressures on salt samples from the Northwich Halite Member. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/cd703497-68f5-4d52-a353-3eef0ff62b3e information dataset dataset INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology 2011 publication See the referenced specification false Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF false Each sample was subjected to triaxial stress conditions, where the primary principal stress corresponded to the axial stress and the intermediate and minimum principal stresses are equal to the confining pressure. The experiments followed a three-stage process: (1) hydrostatic loading to a pre-determined confining pressure (5–45 MPa), (2) active deformation under either a constant strain rate (ranging from 1e-5 to 1e-3 per second) or a constant displacement rate (0.0012–0.12 mm/s), and (3) stress unloading. The confining pressure remained constant throughout each test, while temperature and humidity were maintained at room conditions. Measurements were recorded at a rate of 4 Hz in time domain and at every 250 N in force domain to capture force variations accurately. An axial displacement correction was applied using a 5th-order polynomial to obtain a true measure of sample displacement.