MORTAR STRENGTH OF PCC SANDS

ACCELERATED MORTAR STRENGTH TESTS WERE INVESTIGATED. A STATISTICAL ANALYSIS WAS CONDUCTED TO DETERMINE THE VARIATIONS AND SIGNIFICANCE OF THE DIFFERENT METHODS. THE PROCEDURE INCLUDES THE USE OF A MODIFIED SAND GRADING, CONSTANT WATER-CEMENT RATIO FOR THE CONTROL MORTAR, AND THE USE OF TYPE III CEMENT WITH CALCIUM CHLORIDE ADDED. THE COMPRESSIVE STRENGTH OF THE SPECIMENS, AFTER 24 HOURS OF CURING, IS APPROXIMATELY THE SAME AS THE 7 DAY CURE TEST AND THE RANKING OF THE SANDS REMAIN THE SAME. THE REPRODUCIBILITY OF THE TEST IS POOR BY EITHER METHOD BUT NO SIGNIFICANT LOSS IS EVIDENT IN THE USE OF THE 24 HOUR CURE METHOD. CONCURRENT TESTING BY THE TWO METHODS IS RECOMMENDED TO INSURE CONSISTENCY UNTIL NEW SPECIFICATIONS, BASED ON ACCELERATED TEST RESULTS, ARE DEVELOPED. /AUTHOR/

  • Corporate Authors:

    California Division of Highways

    Bridge Department
    Sacramento, CA  United States  05914

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00212117
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: Study No F-4-13 (2)
  • Files: TRIS, USDOT
  • Created Date: Mar 27 1972 12:00AM