TREATMENT FOR UPGRADING BASE MATERIALS

THE SUBJECT STUDY WAS MADE TO ETERMINE THE FEASIBILITY OF USING AND METHODS OF TREATING SUBSTANDARD BASE COURSE MATERIALS WITH EITHER PORTLAND CEMENT OR ASPHALT. DETAILED TESTS WERE MADE ON FOUR MATERIALS, REPRESENTATIVES OF MOST THE SUBSTANDARD AGGREGATE TYPES IN THE STATE OF OREGON. THESE MATERIALS WERE (1) A WEATHERED VESICULAR BASALT, (2) A SUBMARINE BASALT, (3) AN ARGILLITE FROM THREE DIFFERENT QUARRIES, AND (4) A PIT GRAVEL CONTAINING EXCESSIVE FINES FROM A RIVER BAR. STUDIES WERE MADE USING FOUR DIFFERENT ASPHALT CONTENTS FOR EACH OF FOUR GRADATIONS AND THE CEMENT TREATED STUDIES INCLUDED THREE CEMENT CONTENTS PLUS THE UNTREATED MATERIAL FOR EACH GRADATION. THE RESULTS OF THE STUDY INDICATED THAT (1) THE VESICULAR BASALT WOULD NOT BE RECOMMENDED FOR USE SINCE NEITHER THE CEMENT NOR ASPHALT TREATMENTS WERE ENTIRELY SATISFACTORY, (2) THE SUBMARINE BASALT REACTED WELL TO A TREATMENT WITH 6 PERCENT CEMENT, AND QUITE WELL WITH 4.5 PERCENT CEMENT, BUT VALUES OBTAINED FOR THE ASPHALT TREATED AGGREGATE WERE GENERALLY BELOW DESIRABLE LIMITS, (3) THE ARGILLITE AGGREGATES PROVED ADEQUATE FOR ALL GRADATIONS WHEN TREATED WITH CEMENT, AND THOUGH BELOW DESIRABLE LIMITS WHEN TREATED WITH ASPHALT, THEY WERE CLOSE TO GUIDELINE CRITERIA AND ACCEPTABLE, AND (4) THE PIT GRAVEL TESTED WITH CEMENT PROVED ADEQUATE WITH 6 PERCENT CEMENT AT ALL GRADATIONS, BUT ASPHALT TREATMENT DID NOT PROVIDE SUITABLE RESISTANCE TO MOISTURE. /AUTHOR/

  • Corporate Authors:

    Oregon State Highway Department

    /Materials and Research Dept
    ,   USA 

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Beecroft, C W
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00230713
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: 5142-12
  • Files: TRIS, USDOT
  • Created Date: Jan 26 1971 12:00AM