EFFECT OF ALCOHOL STRENGTH AND TEMPERATURE IN THE USE OF THE CHACE AIR INDICATOR

THE CHACE AIR INDICATOR, USED FOR ROUTINE DETERMINATIONS OF ENTRAINED AIR IN PORTLAND CEMENT CONCRETE OVER A THREE YEAR PERIOD, HAS PERFORMED ACCEPTABLY WITHIN 1 % OF THE ACTUAL ENTRAINED AIR VALUES WHEN HANDLED CORRECTLY AND OPERATED PROPERTLY. THERE WERE INSTANCES, HOWEVER, WHEN VALUES WERE AS MUCH AS 100% IN ERROR AND IN EACH INSTANCE, THERE APPEARED TO BE A CONNECTION BETWEEN HIGH TEMPERATURE DIFFERENTIALS OF THE CONSTITUENTS IN THE TEST, STRENGTH OF ALCOHOL, OR BOTH. THIS INVESTIGATION WAS MADE TO PROVIDE ADDITIONAL GUIDANCE ON PROPER ALCOHOL STRENGTH AND TEMPERATURES. RECOMMENDATIONS WERE: (1) ONLY 70 % STRENGTH ISOPROPYL ALCOHOL IS TO BE USED; (2) THE SUPPLY OF ALCOHOL IS TO PROTECTED FROM EXCESSIVE HEAT OR COLD IN ORDER THAT THE TEMPERATURE OF THE ALCOHOL AND THE CONCRETE MORTAR BE REASONABLY CLOSE TOGETHER; (3) THE TEST IS TO BE PERFORMED WITH CARE AND AS RAPIDLY AS POSSIBLE TO AVOID AND THERMOMETER EFFECT.

  • Supplemental Notes:
    • LI 23-70 MR
  • Corporate Authors:

    Texas State Department of Highways & Public Transp

    11th and Brazos Streets
    Austin, TX  United States  78701
  • Authors:
    • Elmore, W E
  • Publication Date: 1970-10-30

Media Info

  • Features: Tables;
  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00214138
  • Record Type: Publication
  • Files: TRIS, STATEDOT
  • Created Date: Jun 28 1972 12:00AM