ASPHALT EMULSION STABILIZED SOILS AS A BASE MATERIAL IN ROADS

A COLLECTION OF LABORATORY PROCEDURES, CALLED AN EVALUATION SYSTEM IS PRESENTED FOR USE IN EVALUATING SOILS STABILIZED WITH ASPHALT EMULSION. THIS EVALUATION SYSTEM CONSISTS OF A SET OF PROCEDURES WITH WHICH TO SELECT A SOIL FOR POSSIBLE STABILIZATION AND A SET OF PROCEDURES WITH WHICH TO EVALUATE THE SOIL-EMULSION SYSTEM. INTRODUCED WITH THIS SYSTEM IS A FACTOR OF FACTORIAL EXPERIMENTAL DESIGN AND DATA INDICATING THE ADVANTAGES OF THIS PARTICULAR DESIGN IN SELECTING THE FORMULATION OF WATER AND EMULSION AT WHICH THE OPTIMUM R VALUES ARE FOUND. THE PRIMARY TEST METHOD USED TO EVALUATE A SOIL-EMULSION SYSTEM IS BASED UPON AN R VALUE PROCEDURE AS DEVELOPED BY THE STATE OF CALIFORNIA AND SOMEWHAT ALTERED FOR USE ON EMULSION STABILIZED SOILS. THE ESSENCE OF THIS PROCEDURE IS THE DETERMINATION OF R VALUE OF A STABILIZED SOIL BEFORE CURING, AFTER CURING AND AFTER A WATER SOAK. THE WATER SOAK IS ACCOMPLISHED BY A VACUUM SOAK METHOD, THE MAIN ADVANTAGE IS THE SAVINGS IN TIME THAT IS OBTAINED SINCE THE METHOD REQUIRES ONLY 2 HOURS. DATA OBTAINED DURING THE DEVELOPMENT OF THE EVALUATION SYSTEM SHOWS THAT THE BEST R VALUES ARE OBTAINED WHEN A STABILIZED SOIL IS COMPACTED AT A TOTAL LIQUID CONTENT OF 1-3 PERCENT LESS THAN THE OPTIMUM MOISTURE CONTENT OF THE SOIL. IT WAS ALSO NOTED THAT THE MAXIMUM DENSITY OF THE STABILIZED SOIL IS OFTEN GREATER THAN THE MAXIMUM DENSITY OF THE ORIGINAL SOIL WHEN BOTH ARE COMPACTED UNDER SIMILAR CONDITIONS. THIS MAY BE RELATED TO THE FACT THAT THE WATER IN THE EMULSION IS WETTER THAN WATER NORMALLY USED IN COMPACTION DUE TO THE PRESENCE OF SURFACE ACTIVE EMULSIFYING AGENTS. /AUTHOR/

  • Supplemental Notes:
    • Vol 34, pp 356-395, 16 FIG, 5 TAB, 7 REF, 2 APP
  • Authors:
    • Dunning, R L
    • Turner, F E
  • Conference:
  • Publication Date: 0

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    • Issue Number: 0

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Filing Info

  • Accession Number: 00231278
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 2004 2:41AM