Density-Is It Worth Measuring?

In regard to the value of measuring density in concrete, test cylinder density has been shown to provide valuable clues to the reasons behind strength variations. Density data must be accompanied by at least two or three strength test results data. The author examines such issues as water content, air content, and density; when and how to measure density; and cost/benefit considerations. The author recommends detecting concrete property changes through multigrade, multivariable cusum (cumulative sum) graphs. An insert describes quality control using cusum graphing, in which the cumulative sum represents the difference between a target value (preferably the previous mean) and each successive result.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/4163061
• Authors:
  • Day, Ken W
• Publication Date: 2008-1

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 47-49
• Serial:
  • Concrete International
  • Volume: 30
  • Issue Number: 1
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0162-4075

Subject/Index Terms

• TRT Terms: Air content; Benefit cost analysis; Concrete; Density; Measurement; Moisture content; Strength of materials
• Uncontrolled Terms: Change; Change detection; Cumulative sum; Test cylinders
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01089129
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 26 2008 12:52PM