ERODIBILITY OF A CEMENT-STABILIZED SANDY SOIL

CEMENT-STABILIZED SOIL HAS BEEN SUCCESSFULLY USED AS FACING OR LINING FOR HIGHWAY EMBANKMENTS AND DRAINAGE DITCHES TO REDUCE THE PERIL OF EROSION. HOWEVER, VERY LITTLE INFORMATION REGARDING ITS ERODIBILITY IS AVAILABLE. IN AN EFFORT TO CHARACTERIZE THE ERODIBILITY OF COMPACTED CEMENT-STABILIZED SOIL UNDER VARIOUS PHYSICAL AND ENVIRONMENTAL CONDITIONS, BOTH EROSION AND UNCONFINED COMPRESSIVE STRENGTH TESTS WERE CARRIED OUT ON A SANDY SOIL MIXED WITH VARIOUS AMOUNTS OF CEMENT (1, 1 1/2, 2, AND 3 PERCENT OF CEMENT BY DRY WEIGHT). THE VARIOUS SAMPLES WERE COMPACTED BY KNEADING TO A DRY DENSITY OF 132.4 PCF AT A MOISTURE CONTENT OF 8.1 PERCENT AND THEN CURED FOR 7 DAYS IN A CONSTANT- TEMPERATURE MOISTURE ROOM. A SPECIFIED NUMBER OF WET- DRY OR FREEZE-THAW CYCLES (0, 3, 6, 9, AND 12) WERE APPLIED TO DIFFERENT SAMPLES TO DETERMINE THE EFFECT OF ENVIRONMENTAL CHANGES ON THE MECHANICAL AND HYDRAULIC STABILITY OF THE SOIL. FOR THE UNCYCLED SAMPLES (NO TREATMENT) THE CRITICAL BOUNDARY SHEAR STRESS INCREASED AS THE UNCONFINED COMPRESSIVE STRENGTH (OR THE CEMENT CONTENT) OF THE SAMPLE INCREASED. A SIMPLE RELATIONSHIP BETWEEN THE UNCONFINED COMPRESSIVE STRENGTH AND THE CRITICAL BOUNDARY SHEAR STRESS WAS OBTAINED FOR THE RANGE OF CEMENT CONTENTS USED IN THIS INVESTIGATION. ERODIBILITY CHARACTERIZATION OF CEMENT- STABILIZED SOIL CONSIDERING THE INFLUENCE OF CLIMATIC CHANGES IS VERY COMPLEX. THE CRITICAL BOUNDARY SHEAR STRESS IS NO LONGER A UNIQUE PARAMETER TO DEFINE THE HYDRAULIC STABILITY OF THE SOIL. THE ALTERNATING ACTION OF FIELD WEATHERING AND EROSION IS DETERMINED TO THE INTEGRITY OF THE SOIL. HOWEVER, THE NATURE OF THE TIME- AND ENVIRONMENT- DEPENDENT ERODIBILITY OF THE CEMENT- STABILIZED SOIL IS NOT FULLY KNOWN; MORE BASIC INFORMATION CONCERNING THE INTERACTION AMONG SOIL, WATER, AND ENVIRONMENTAL FACTORS IS URGENTLY NEEDED. /AUTHOR/

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  • Authors:
    • Akky, M R
    • Shen, C K
  • Conference:
  • Publication Date: 1973

Media Info

  • Media Type: Digital/other
  • Features: Figures; References;
  • Pagination: pp. 30-41
  • Monograph Title: SOIL EROSION: CAUSES AND MECHANISMS: PREVENTION AND CONTROL
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00236632
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Jun 25 1973 12:00AM