REPORT ON SUBGRADE INVESTIGATIONS FOR THE YEAR

THE MOST UNFAVORABLE SUBGRADE CONDITIONS ARE DUE TO EXCESS MOISTURE IN SOILS THAT ARE AFFECTED THEREBY. SUCH EXCESS MOISTURE RESULTS FROM (1) POOR SURFACE DRAINAGE, AND (2) POOR INTERNAL DRAINAGE. UNDER THE MOST FAVORABLE CLIMATIC CONDITIONS FEW FAILURES ARE DUE TO THE SUBGRADE. FAVORABLE CLIMATES INVOLVE MODERATE TEMPERATURES WITH COMPARATIVELY LOW PRECIPITATION, AND PARTICULARLY LOW PRECIPITATION DURING THE WINTER MONTHS. UNFAVORABLE CLIMATES HAVE LONG CONTINUED PERIODS OF COLD WEATHER; HIGH PRECIPITATION DURING THE FREEZING WEATHER; OR FREQUENT ALTERNATIONS OF FREEZING AND THAWING COMBINED WITH DEEP FREEZING. ADDITIONAL INFORMATION ON ADMIXTURES FOR SUBGRADES IS INCLUDED IN THIS REPORT.

  • Supplemental Notes:
    • Vol 5, Pt 1, PP 43-67, 17 FIG, 1 TAB
  • Authors:
    • Mullis, I B
  • Publication Date: 1926

Media Info

  • Monograph Title: Proceedings of the Fifth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 3-4, 1925. Part I: Reports of Research Committees and of Special Investigations
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00232862
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Nov 9 1970 12:00AM