IN-PLACE METHODS TO ESTIMATE CONCRETE STRENGTH

Guidance is provided on the use of methods to estimate the in-place strength of concrete in new and existing construction. The methods include: rebound hammer, penetration resistance, pullout, break-off, ultrasonic pulse velocity, maturity, and cast-in-place cylinders. The principle, inherent limitations, and repeatability of each method are reviewed. Procedures are presented for developing the relationship needed to estimate compressive strength from in-place results. Factors to consider in planning in-place tests are discussed, and statistical techniques to interpret test results are presented. The use of in-place tests for acceptance of concrete is introduced. The appendix provides information on the number of strength levels that should be used to develop the strength relationship and explains a regression analysis procedure that accounts for error in the independent variable.

  • Corporate Authors:

    American Concrete Institute

    P.O. Box 19150, Redford Station, 22400 Seven Mile Road
    Detroit, MI  United States  48219
  • Publication Date: 1996-1

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 41 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00722109
  • Record Type: Publication
  • Report/Paper Numbers: ACI 228.1R-95
  • Files: TRIS
  • Created Date: May 14 1996 12:00AM