PORE-SIZE DISTRIBUTION AND ITS RELATION TO DURABILITY AND STRENGTH OF SHALES

Shale durabiliity is measured by resistance to slaking in a standard laboratory test. All slaking mechanisms (namely, air-pressure breakage, differential swelling, and dissolution of cementing agents) require that water penetrate the pore space of the shale pieces. Since it is now possible to measure the magnitude and size distribution of these pores by mercury intrusion, correlation of slaking and pore-size distribution is feasible. Testing of slake durability, pore-size distribution, and point-load strength was undertaken on eight Indiana shales of varying durability and strength. It is proposed that the shales be classified as to performance in compacted embankments by slake-durability and point-load-strength indices and that either index can be estimated from parameters of the pore-size distribution. Parameters from the pore-size distribution study (namely, cumulative porosity, median diameter, and spread factor) were correlated with the slake durability and the point-load strength by linear regression. These Indiana shales were then classified into performance categories based on durability and strength values predicted from the measured pore-size parameters. Thus, the pore-size measurements appear to have both conceptual and practical value with respect to the design and construction of compacted shale embankements. (Author)

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1981/827/827-008.pdf
• Summary URL:
  https://scholar.google.com/scholar_lookup?title=PORE-SIZE+DISTRIBUTION+AND+ITS+RELATION+TO+DURABILITY+AND+STRENGTH+OF+SHALES&author=M.+Surendra&author=C.+Lovell&author=L.+Wood&publication_year=1981
• Availability:
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Physicochemical Phenomena in Soils. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Surendra, M
  • Lovell, C W
  • Wood, L E
• Conference:
  • 60th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1981-1-12 to 1981-1-16
• Publication Date: 1981

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 34-40
• Monograph Title: General soils problems
• Serial:
  • Transportation Research Record
  • Issue Number: 827
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Durability; Embankments; Linear regression analysis; Pore size distribution; Shale; Slaking; Strength of materials
• Old TRIS Terms: Point loads; Resistance
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00348895
• Record Type: Publication
• ISBN: 0309032695
• Files: TRIS, TRB
• Created Date: Oct 30 1982 12:00AM