NONDESTRUCTIVE TESTS TO DETERMINE CONCRETE STRENGTH - A STATUS REPORT

Individual and combined nondestructive test methods have been critically reviewed as potential methods to determine safe formwork removal times. The techniques reviewed are the Windsor probe, the Schmidt Rebound Hammer, pull-out measurements, push-out cylinders, ultrasonic pulse velocity measurements, and the maturity and equivalent age concepts. The individual methods, themselves, do not give good estimates of the in situ strengths of concretes and it is recommended that future research emphasize combined methods. A proposed research program which emphasizes combined nondestructive test methods has been developed.

• Corporate Authors:

  National Bureau of Standards

  Materials and Composites Section
  Washington, DC  United States  20234
• Authors:
  • Clifton, J R
• Publication Date: 1975-7

Media Info

• Pagination: 39 p.

Subject/Index Terms

• TRT Terms: Compressive strength; Concrete; Concrete tests; Flexural strength; Formwork; Measurement; Nondestructive tests; Pile hammers; Pull out test; Pulses; Reviews; Strength of materials; Surface hardening; Ultrasonic tests; Velocity
• Identifier Terms: Schmidt hammer
• Uncontrolled Terms: Pulse velocity; Pushout tests
• Old TRIS Terms: Formwork construction; Pullout
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00094297
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NBSIR-75-729 Final Rpt.
• Files: TRIS
• Created Date: Mar 29 1976 12:00AM