A theoretical model of the fracture of rock during freezing
1985; Geological Society of America; Volume: 96; Issue: 3 Linguagem: Inglês
10.1130/0016-7606(1985)96 2.0.co;2
ISSN1943-2674
Autores Tópico(s)Landslides and related hazards
ResumoResearch Article| March 01, 1985 A theoretical model of the fracture of rock during freezing JOSEPH WALDER; JOSEPH WALDER 1Quaternary Research Center, University of Washington, Seattle, Washington 98195 Search for other works by this author on: GSW Google Scholar BERNARD HALLET BERNARD HALLET 2Quaternary Research Center and Department of Geological Sciences, University of Washington, Seattle, Washington 98195 Search for other works by this author on: GSW Google Scholar Author and Article Information JOSEPH WALDER 1Quaternary Research Center, University of Washington, Seattle, Washington 98195 BERNARD HALLET 2Quaternary Research Center and Department of Geological Sciences, University of Washington, Seattle, Washington 98195 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1985) 96 (3): 336–346. https://doi.org/10.1130/0016-7606(1985)96 2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation JOSEPH WALDER, BERNARD HALLET; A theoretical model of the fracture of rock during freezing. GSA Bulletin 1985;; 96 (3): 336–346. doi: https://doi.org/10.1130/0016-7606(1985)96 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract We present a mathematical model for the breakdown of porous rock by the growth of ice within cracks. The model is founded upon well-established principles of fracture mechanics and recent advances in soil physics, along with the assumption that progressive crack growth results from water migrating to ice bodies in cracks, much as water migrates to ice lenses in freezing soil.Our model predicts crack-growth rates compatible with empirical data. Calculations for a granite and a marble indicate that sustained freezing is most effective in producing crack growth when temperatures range from ∼ −4 °C to −15 °C. At higher temperatures, thermodynamic limitations prevent ice pressure from building up sufficiently to produce significant crack growth; at lower temperatures, the migration of water necessary for sustaining crack growth is strongly inhibited. In hydraulically "open" systems, in which pore-water pressure remains near atmospheric pressure during the freezing process, crack-growth rates during continuous cooling will generally be greatest at low rates of cooling, less than ∼0.1–0.5 °C/h. At higher rates of cooling, the influx of water to growing cracks is significantly inhibited.The model delineates clearly the role of material parameters (elastic moduli, fracture-mechanical properties, grain size and shape, and crack size), environmental conditions (temperature, temperature gradient, water pressure), and time in frost damage to rocks. Our calculations, along with recent experimental work on water migration in freezing rocks (Fukuda, 1983), lead us to question the widely accepted importance of two phenomena—freezing of water in sealed cracks and freeze-thaw cycling—in the fracture of rock exposed to natural freezing conditions. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Referência(s)