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ACCELERATED STRENGTH DETERMINATION ON CEMENT USING MINIATURE TEST CYLINDERS

RESULTS ARE REPORTED OF A STUDY COVERING SEVERAL RAPID TESTING METHODS DEVELOPED FOR ESTIMATING THE 28-DAY STRENGTH OF PORTLAND CEMENT. IT SHOWS THAT MINIATURE COMPACTED TEST CYLINDERS OF PURE CEMENT AND MORTAR MAY BE USED SUCCESSFULLY FOR COMPRESSIVE AND SPLIT-TENSILE STRENGTH DETERMINATIONS AFTER VARIOUS ACCELERATED CURING PROCEDURES. OF THE THREE PRINCIPAL METHODS INVESTIGATED, THE BOILING OF MODIFIED STANDARD MORTAR MINICYLINDERS APPEARS TO BE THE MOST PROMISING FOR A ROUTINE QUALITY CONTROL AT THE CEMENT PLANT. THE RATIO OF 7-H ACCELERATED STRENGTH TO 28-DAY CUBE STRENGTH, DEPENDING ON THE TYPE OF CEMENT, RANGED FROM ABOUT 40 TO 70 PERCENT. THE METHOD IS SIMPLE AND THE TEST RESULTS SHOWED A HIGH DEGREE OF REPRODUCIBILITY. THE 8-H, PURE CEMENT, BOILING METHOD PRODUCED RESULTS WHICH WERE VERY HIGH, EXCEEDING THE 28-DAY STRENGTH OF STANDARD MORTAR CUBES BY 2.4 TO 3.8 TIMES AND SHOWING RESULTS WHICH WERE ERRATIC FOR CEMENTS WITH DIFFERENT STRENGTH PRODUCING PROPERITES. THE 4.5-H AUTOCLAVE METHOD IS THE SHORTEST ONE, PRODUCING ACCELERATED STRENGTH APPROACHING THE STANDARD 28-DAY CUBE STRENGTH. THOUGH AN EFFICIENT METHOD, THE HYDROTHERMAL TREATMENT INTRODUCES ADDITIONAL CHEMICAL REACTIONS WHICH MAY CRITICALLY AFFECT SOME STRENGTH PROPERTIES OF CEMENT MORTAR. /ASTM/

  • Supplemental Notes:
    • Vol 6, No 1, PP 82-104, 10 FIG, 11 TAB, 10 REF
  • Corporate Authors:

    American Society for Testing and Materials (ASTM)

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Zoldners, N G
    • Carette, G G
  • Publication Date: 1971-3

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Filing Info

  • Accession Number: 00214004
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 3 1971 12:00AM