EFFECT OF CAPPING MATERIALS AND PROCEDURES ON THE MEASURED COMPRESSIVE STRENGTH OF HIGH-STRENGTH CONCRETE

Researchers investigated the effect of end conditions and testing procedures on the measured strength of 100- by 200-mm concrete cylinders. Concretes were prepared representing three strength levels: 50, 75, 120 MPa. Cylinder end conditions included grinding and capping with two types of sulfur mortar and cement paste. Investigators also examined the effect of thickness of capping material. Results of these evaluations follow. Cement paste caps produced 1 percent higher strengths than ground ends, regardless of concrete strength level and cap thickness. The cylinders capped with sulfur mortar 2 hours before testing resulted in 2 to 7 percent lower strengths than the ground condition. Strengths equivalent to the ground condition were observed when cylinders were capped with sulfur mortar 7 days prior to testing, except with thick caps of sulfur mortar on the 120 MPa concrete, in which case lower strengths were noted. No significant difference between sulfur mortars was apparent.

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  • Corporate Authors:

    American Society for Testing and Materials

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  USA  19428-2957
  • Authors:
    • Lobo, C L
    • Mullings, G M
    • Gaynor, R D
  • Publication Date: 1994-12

Language

  • English

Media Info

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Filing Info

  • Accession Number: 00675523
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 15 1995 12:00AM