PORE SIZE DISTRIBUTION OF COMPACTED SOILS AFTER CRITICAL REGION DRYING

The major objective of this research was to develop an improved insight into the soil compaction process in terms of the pore size distribution resulting from variations of the soil compaction variables, and of the changes in this parameter arising as a result of exposing compacted soils to soaking under a moderate surcharge, thus partly simulating service conditions. The mercury intrusion technique was used to obtain pore size distributions on dried specimens of a number of naturally occurring soils, each compacted at a number of water contents by the Standard Proctor method and/or by 3 levels of compactive effort in the Modified Proctor method. The wet specimens were dried by transforming soil water to water vapor in the critical region without effecting change in the total porosity and probably in the size distribution of pores. It was shown that different soils compacted to a given percentage compaction, but to different total porosities, on the dry side of Standard Proctor optimum moisture contents have significantly different pore size distributions. On the other hand, these soils compacted at Standard Proctor optimum moisture contents to different total porosities had pore size distributions similar to each other except that the content of pores below 0.1 mu m varied with the clay traction, and to some extent the type of soil. ;FHWA;

  • Availability:
  • Supplemental Notes:
    • Study sponsored by the Indiana State Highway Commission and conducted in cooperation with U.S. Department of Transportation, Federal Highway Administration. See also NTIS PB-245427/AS.
  • Corporate Authors:

    Purdue University/Indiana Department of Transportation JHRP

    Purdue University, School of Civil Engineering
    West Lafayette, IN  USA  47907-1284
  • Authors:
    • Bhasin, R N
  • Publication Date: 1975-3

Media Info

  • Pagination: 239 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00130553
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • ISBN: JHRP-75-3
  • Report/Paper Numbers: Final Rpt.
  • Contract Numbers: HPR-1(12) Part II
  • Files: TRIS, USDOT
  • Created Date: Mar 29 1976 12:00AM