The behaviour of Hong Kong volcanic saprolites in one-dimensional compression

I. Rocchi; I.A. OKEWALE; M.R. Coop

doi:10.1201/b18897-37

The behaviour of Hong Kong volcanic saprolites in one-dimensional compression

I. Rocchi^*
, I.A. OKEWALE
, M.R. Coop

^*Corresponding author for this work

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

6 Citations (Scopus)

Abstract

An extensive research programme focusing on the one-dimensional compression behaviour of reconstituted and intact volcanic saprolites was carried out. A number of block samples, including saprolites originating from different parent rocks or taken at different sites within a same formation, were tested. The intrinsic behavior of reconstituted samples indicated that some of the soils had very slow convergence to a unique instrinsic normal compression line (ICL) and/or rather shallow slopes of compression paths. The slope of the ICL (λ) changed with the sampling location, even if most samples belonged to the same weathering grade and were taken at shallow depths. The relationship between λ and the amount of fines was established and the effects of structure were studied comparing the compression tests of intact specimens to their respective ICL. The extent to which these tests crossed the ICL was variable and in some cases the curves simply converged to the ICL, showing no effect of structure.

Original language	English
Title of host publication	Volcanic Rocks and Soils
Subtitle of host publication	Proceedings of the International Workshop on Volcanic Rocks and Soils, Lacco Ameno, Ischia Island, Italy, 24–25 September 2015
Editors	Tatiana Rotonda, Manuela Cecconi, Francesco Silvestri, Paolo Tommasi
Publisher	CRC Press/Balkema
Pages	281-287
ISBN (Print)	9781138028869
DOIs	https://doi.org/10.1201/b18897-37
Publication status	Published - Sept 2015
Event	International Workshop on Volcanic Rocks and Soils 2015 - Lacco Ameno, Ischia Island, Italy Duration: 24 Sept 2015 → 25 Sept 2015

Conference

Conference	International Workshop on Volcanic Rocks and Soils 2015
Place	Italy
City	Lacco Ameno, Ischia Island
Period	24/09/15 → 25/09/15

Research Keywords

MECHANICAL-BEHAVIOR

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Rocchi, I., OKEWALE, I. A., & Coop, M. R. (2015). The behaviour of Hong Kong volcanic saprolites in one-dimensional compression. In T. Rotonda, M. Cecconi, F. Silvestri, & P. Tommasi (Eds.), Volcanic Rocks and Soils: Proceedings of the International Workshop on Volcanic Rocks and Soils, Lacco Ameno, Ischia Island, Italy, 24–25 September 2015 (pp. 281-287). CRC Press/Balkema. https://doi.org/10.1201/b18897-37

Rocchi, I. ; OKEWALE, I.A. ; Coop, M.R. / The behaviour of Hong Kong volcanic saprolites in one-dimensional compression. Volcanic Rocks and Soils: Proceedings of the International Workshop on Volcanic Rocks and Soils, Lacco Ameno, Ischia Island, Italy, 24–25 September 2015. editor / Tatiana Rotonda ; Manuela Cecconi ; Francesco Silvestri ; Paolo Tommasi. CRC Press/Balkema, 2015. pp. 281-287

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Rocchi, I, OKEWALE, IA & Coop, MR 2015, The behaviour of Hong Kong volcanic saprolites in one-dimensional compression. in T Rotonda, M Cecconi, F Silvestri & P Tommasi (eds), Volcanic Rocks and Soils: Proceedings of the International Workshop on Volcanic Rocks and Soils, Lacco Ameno, Ischia Island, Italy, 24–25 September 2015. CRC Press/Balkema, pp. 281-287, International Workshop on Volcanic Rocks and Soils 2015, Lacco Ameno, Ischia Island, Italy, 24/09/15. https://doi.org/10.1201/b18897-37

The behaviour of Hong Kong volcanic saprolites in one-dimensional compression. / Rocchi, I.; OKEWALE, I.A.; Coop, M.R.
Volcanic Rocks and Soils: Proceedings of the International Workshop on Volcanic Rocks and Soils, Lacco Ameno, Ischia Island, Italy, 24–25 September 2015. ed. / Tatiana Rotonda; Manuela Cecconi; Francesco Silvestri; Paolo Tommasi. CRC Press/Balkema, 2015. p. 281-287.

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

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AB - An extensive research programme focusing on the one-dimensional compression behaviour of reconstituted and intact volcanic saprolites was carried out. A number of block samples, including saprolites originating from different parent rocks or taken at different sites within a same formation, were tested. The intrinsic behavior of reconstituted samples indicated that some of the soils had very slow convergence to a unique instrinsic normal compression line (ICL) and/or rather shallow slopes of compression paths. The slope of the ICL (λ) changed with the sampling location, even if most samples belonged to the same weathering grade and were taken at shallow depths. The relationship between λ and the amount of fines was established and the effects of structure were studied comparing the compression tests of intact specimens to their respective ICL. The extent to which these tests crossed the ICL was variable and in some cases the curves simply converged to the ICL, showing no effect of structure.

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ER -

Rocchi I, OKEWALE IA, Coop MR. The behaviour of Hong Kong volcanic saprolites in one-dimensional compression. In Rotonda T, Cecconi M, Silvestri F, Tommasi P, editors, Volcanic Rocks and Soils: Proceedings of the International Workshop on Volcanic Rocks and Soils, Lacco Ameno, Ischia Island, Italy, 24–25 September 2015. CRC Press/Balkema. 2015. p. 281-287 doi: 10.1201/b18897-37

The behaviour of Hong Kong volcanic saprolites in one-dimensional compression

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