A pilot study investigating the rapid estimation of intact dry density of chalk using low impact energy hardness measurements taken with an Equotip Leeb hardness tester.
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| Title: | A pilot study investigating the rapid estimation of intact dry density of chalk using low impact energy hardness measurements taken with an Equotip Leeb hardness tester. |
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| Authors: | Thrower, Andrew1 (AUTHOR) A.Thrower@Sussex.ac.uk, Barlow, John1 (AUTHOR), Moore, Roger2 (AUTHOR), Cane, Tim1 (AUTHOR) |
| Source: | Quarterly Journal of Engineering Geology & Hydrogeology. May2022, Vol. 55 Issue 2, p1-10. 10p. |
| Subjects: | Chalk, Pilot projects, Sheet steel, Density, Engineering design |
| Geographic Terms: | Sussex (England) |
| Abstract: | Intact dry density (IDD) is a key parameter for characterizing the rock mass behaviour of chalk and is often the main classification property reported for engineering design. The role of IDD in coastal chalk settings has been discussed in the literature as an important rock control for coastal cliff recession behaviour. This study demonstrates a tool that can reliably estimate the IDD of chalk samples. Originally developed for testing sheet steel materials, the Equotip has been shown to be adaptable for geological applications and the results of this study show that the Equotip can be used to derive a surface hardness value of dry chalk samples that has a positive correlation with IDD. Furthermore, the results show that the device is sensitive to the anisotropy of chalk and that testing undertaken in the diametral orientation gives more accurate correlations. The results of this study also show that the Equotip is sensitive to environmental setting and the effects of weathering, giving a separate correlation for samples collected along the Sussex coastline from those obtained inland. A statistical assessment of the results shows that a characteristic hardness within an acceptable margin of error can be achieved from an optimal number of single impacts. [ABSTRACT FROM AUTHOR] |
| Copyright of Quarterly Journal of Engineering Geology & Hydrogeology is the property of Geological Society Publishing House and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 156674496 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A pilot study investigating the rapid estimation of intact dry density of chalk using low impact energy hardness measurements taken with an Equotip Leeb hardness tester. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Thrower%2C+Andrew%22">Thrower, Andrew</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> A.Thrower@Sussex.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Barlow%2C+John%22">Barlow, John</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Moore%2C+Roger%22">Moore, Roger</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cane%2C+Tim%22">Cane, Tim</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Quarterly+Journal+of+Engineering+Geology+%26+Hydrogeology%22">Quarterly Journal of Engineering Geology & Hydrogeology</searchLink>. May2022, Vol. 55 Issue 2, p1-10. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Chalk%22">Chalk</searchLink><br /><searchLink fieldCode="DE" term="%22Pilot+projects%22">Pilot projects</searchLink><br /><searchLink fieldCode="DE" term="%22Sheet+steel%22">Sheet steel</searchLink><br /><searchLink fieldCode="DE" term="%22Density%22">Density</searchLink><br /><searchLink fieldCode="DE" term="%22Engineering+design%22">Engineering design</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Sussex+%28England%29%22">Sussex (England)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Intact dry density (IDD) is a key parameter for characterizing the rock mass behaviour of chalk and is often the main classification property reported for engineering design. The role of IDD in coastal chalk settings has been discussed in the literature as an important rock control for coastal cliff recession behaviour. This study demonstrates a tool that can reliably estimate the IDD of chalk samples. Originally developed for testing sheet steel materials, the Equotip has been shown to be adaptable for geological applications and the results of this study show that the Equotip can be used to derive a surface hardness value of dry chalk samples that has a positive correlation with IDD. Furthermore, the results show that the device is sensitive to the anisotropy of chalk and that testing undertaken in the diametral orientation gives more accurate correlations. The results of this study also show that the Equotip is sensitive to environmental setting and the effects of weathering, giving a separate correlation for samples collected along the Sussex coastline from those obtained inland. A statistical assessment of the results shows that a characteristic hardness within an acceptable margin of error can be achieved from an optimal number of single impacts. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Quarterly Journal of Engineering Geology & Hydrogeology is the property of Geological Society Publishing House and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1144/qjegh2021-101 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 1 Subjects: – SubjectFull: Chalk Type: general – SubjectFull: Pilot projects Type: general – SubjectFull: Sheet steel Type: general – SubjectFull: Density Type: general – SubjectFull: Engineering design Type: general – SubjectFull: Sussex (England) Type: general Titles: – TitleFull: A pilot study investigating the rapid estimation of intact dry density of chalk using low impact energy hardness measurements taken with an Equotip Leeb hardness tester. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Thrower, Andrew – PersonEntity: Name: NameFull: Barlow, John – PersonEntity: Name: NameFull: Moore, Roger – PersonEntity: Name: NameFull: Cane, Tim IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2022 Type: published Y: 2022 Identifiers: – Type: issn-print Value: 14709236 Numbering: – Type: volume Value: 55 – Type: issue Value: 2 Titles: – TitleFull: Quarterly Journal of Engineering Geology & Hydrogeology Type: main |
| ResultId | 1 |
