The Correlation between the Water/Cementitious Material Ratio and HPC Compressive Strength

The water/cementitious material ratio (w/cm) remains an essential, descriptive statistic for today’s increasingly complex HPC mixtures. The water/cement ratio (w/c) is also useful. A sample of 125 high performance concrete (HPC) mixtures of various materials and proportions was fitted with linear regression models relating compressive strength at ages of 1, 28 and 56 days to the w/cm and/or w/c. It was observed that strength generally increased as the w/cm or w/c was lowered. But linear regression models using a single independent variable, either the w/cm or w/c, failed to return a coefficient of determination, R squared, more than 0.535. It was learned that the w/c provides a stronger indication of strength at 1 day. By 28 and 56 days, because of pozzolanic activity, the w/cm becomes a better indication of strength. Multiple linear regression models using both the w/cm and w/c capture more of the variability in the data.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0870311808
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Freyne, S F
  • Hale, W Micah
• Conference:
  • Seventh International Symposium on the Utilization of High Strength/High-Performance Concrete
  • Location: Washington DC, United States
  • Date: 2005-6-20 to 2005-6-24
• Publication Date: 2005

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 165-172
• Monograph Title: Seventh International Symposium on the Utilization of High Strength/High-Performance Concrete
• Serial:
  • Volume: 1 & 2

Subject/Index Terms

• TRT Terms: Cement; Compressive strength; Concrete mixing; Correlation analysis; High strength concrete; Linear regression analysis; Materials; Mixtures; Pozzolanic action; Water cement ratio
• Subject Areas: Data and Information Technology; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01004597
• Record Type: Publication
• ISBN: 0870311808
• Files: TRIS
• Created Date: Sep 29 2005 12:35PM