PERMANENCE OF CALCIUM CHLORIDE IN SUBGRADE AND STABILIZED BASES AND ITS EFFECTIVENESS ON BASE COURSE DENSITIES

EXPERIMENTS WERE CONDUCTED TO DETERMINE THE BASE COURSE DENSITIES OF SEVERAL BITUMINOUS ROADS TREATED WITH CALCIUM CHLORIDE TO OBTAIN A MORE FAVORABLE MOISTURE CONTENT. THE ROADS WERE TESTED AFTER SEVERAL YEARS OF USE TO DETERMINE HOW MUCH OF THE CALCIUM CHLORIDE ORIGINALLY PLACED STILL REMAINED. TWO SAMPLINGS WERE MADE IN THE SUMMER OF 1942 AND THE SUMMER OF 1946 TO DETERMINE THE CHANGES OF DENSITY AND CHLORIDE CONTENT WITH TIME. BASE COURSE DENSITIES OF 5 ROADS WERE SAMPLED BY THE SAND METHOD. SAMPLES OF BASE-COURSE AND SUBGRADE MATERIAL WERE ANALYZED FOR HYGROSCOPIC WATER CONTENT, AND FOR CHLORIDE CONTENT BY THE MOHR TITRATION METHOD. CHLORIDE VALUES FROM ROADSIDE BLANKS WERE SUBTRACTED FROM THE AMOUNTS FOUND UNDER THE PAVEMENTS. THE DENSITY VALUES FOUND ARE UNUSUALLY HIGH, BUT THERE ARE NO BLANK VALUES (FROM UNTREATED SECTIONS) FOR COMPARISON. AFTER A PERIOD OF 5 TO 10 YEARS, ONE-THIRD TO ONE-HALF OF THE CHLORIDE ORIGINALLY PLACED STILL REMAINED. ALMOST THE ENTIRE LOSS OCCURRED DURING THE FIRST FIVE YEARS.

  • Supplemental Notes:
    • No 14, pp 6-8, 1 FIG 1 TAB
  • Corporate Authors:

    Transportation Research Board

    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Authors:
    • SLATE, F O
  • Publication Date: 1948

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00231450
  • Record Type: Publication
  • Source Agency: Highway Research Board Bibliography
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:41AM