Chemo-mechanical weathering of calcarenites: Experiments & theory

M. O. Ciantia, Claudio Di Prisco, Riccardo Castellanza

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

Calcarenite is a very common natural soft rock strongly affected by weathering processes that markedly reduce its mechanical properties with time. Cliffs and underground cavities formed in calcarenites are frequently affected by intense erosion phenomena and unexpected collapses. These latter are usually the final result of a very complex hydro-chemo mechanical process taking place at the micro-scale which can be detected and analyzed by means of field and laboratory experimental test campaigns. In general, test results mainly put in evidence: a) a marked and instantaneous reduction in strength and stiffness when macro-pores are filled with water, b) a slow successive reduction in strength and stiffness occurring in a very long period of time; c) a more pronounced weakening of the material in case of wetting and drying cycles. In the present work we will discuss i) some experimental results used to identify the physics of the processes taking place at the micro-scale and ii) we will describe the main features of a multiscale strain hardening-chemical softening elasto-plastic constitutive model recently conceived by the authors to simulate the hydro-chemo-mechanical process.

Original languageEnglish
Title of host publicationCoupled Phenomena in Environmental Geotechnics: From Theoretical and Experimental Research to Practical Applications - Proceedings of the International Symposium, ISSMGE TC 215
Pages541-548
Number of pages8
Publication statusPublished - 2013
EventInternational Symposium on Coupled Phenomena in Environmental Geotechnics: From Theoretical and Experimental Research to Practical Applications - Torino, Italy
Duration: 1 Jul 20133 Jul 2013

Conference

ConferenceInternational Symposium on Coupled Phenomena in Environmental Geotechnics: From Theoretical and Experimental Research to Practical Applications
CountryItaly
CityTorino
Period1/07/133/07/13

Fingerprint

Weathering
stiffness
weathering
Stiffness
calcarenite
soft rock
macropore
Constitutive models
softening
hardening
cliff
Strain hardening
wetting
Macros
Wetting
Erosion
mechanical property
Drying
cavity
physics

Cite this

Ciantia, M. O., Di Prisco, C., & Castellanza, R. (2013). Chemo-mechanical weathering of calcarenites: Experiments & theory. In Coupled Phenomena in Environmental Geotechnics: From Theoretical and Experimental Research to Practical Applications - Proceedings of the International Symposium, ISSMGE TC 215 (pp. 541-548)
Ciantia, M. O. ; Di Prisco, Claudio ; Castellanza, Riccardo . / Chemo-mechanical weathering of calcarenites : Experiments & theory. Coupled Phenomena in Environmental Geotechnics: From Theoretical and Experimental Research to Practical Applications - Proceedings of the International Symposium, ISSMGE TC 215. 2013. pp. 541-548
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Ciantia, MO, Di Prisco, C & Castellanza, R 2013, Chemo-mechanical weathering of calcarenites: Experiments & theory. in Coupled Phenomena in Environmental Geotechnics: From Theoretical and Experimental Research to Practical Applications - Proceedings of the International Symposium, ISSMGE TC 215. pp. 541-548, International Symposium on Coupled Phenomena in Environmental Geotechnics: From Theoretical and Experimental Research to Practical Applications, Torino, Italy, 1/07/13.

Chemo-mechanical weathering of calcarenites : Experiments & theory. / Ciantia, M. O.; Di Prisco, Claudio; Castellanza, Riccardo .

Coupled Phenomena in Environmental Geotechnics: From Theoretical and Experimental Research to Practical Applications - Proceedings of the International Symposium, ISSMGE TC 215. 2013. p. 541-548.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - Chemo-mechanical weathering of calcarenites

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AU - Di Prisco, Claudio

AU - Castellanza, Riccardo

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N2 - Calcarenite is a very common natural soft rock strongly affected by weathering processes that markedly reduce its mechanical properties with time. Cliffs and underground cavities formed in calcarenites are frequently affected by intense erosion phenomena and unexpected collapses. These latter are usually the final result of a very complex hydro-chemo mechanical process taking place at the micro-scale which can be detected and analyzed by means of field and laboratory experimental test campaigns. In general, test results mainly put in evidence: a) a marked and instantaneous reduction in strength and stiffness when macro-pores are filled with water, b) a slow successive reduction in strength and stiffness occurring in a very long period of time; c) a more pronounced weakening of the material in case of wetting and drying cycles. In the present work we will discuss i) some experimental results used to identify the physics of the processes taking place at the micro-scale and ii) we will describe the main features of a multiscale strain hardening-chemical softening elasto-plastic constitutive model recently conceived by the authors to simulate the hydro-chemo-mechanical process.

AB - Calcarenite is a very common natural soft rock strongly affected by weathering processes that markedly reduce its mechanical properties with time. Cliffs and underground cavities formed in calcarenites are frequently affected by intense erosion phenomena and unexpected collapses. These latter are usually the final result of a very complex hydro-chemo mechanical process taking place at the micro-scale which can be detected and analyzed by means of field and laboratory experimental test campaigns. In general, test results mainly put in evidence: a) a marked and instantaneous reduction in strength and stiffness when macro-pores are filled with water, b) a slow successive reduction in strength and stiffness occurring in a very long period of time; c) a more pronounced weakening of the material in case of wetting and drying cycles. In the present work we will discuss i) some experimental results used to identify the physics of the processes taking place at the micro-scale and ii) we will describe the main features of a multiscale strain hardening-chemical softening elasto-plastic constitutive model recently conceived by the authors to simulate the hydro-chemo-mechanical process.

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Ciantia MO, Di Prisco C, Castellanza R. Chemo-mechanical weathering of calcarenites: Experiments & theory. In Coupled Phenomena in Environmental Geotechnics: From Theoretical and Experimental Research to Practical Applications - Proceedings of the International Symposium, ISSMGE TC 215. 2013. p. 541-548