KANSAS WATER-CEMENT RATIO METER: PRELIMINARY RESULTS

The water-cement ratio of fresh concrete is recognized as the one factor that affects the strength and durability of an adequately compacted concrete mix. Although water-cement ratio is the predominant factor affecting strength of hardened concrete, currently no widely used, reliable method is available for measuring water-cement ratio in the field. A prototype device has been developed to measure the water-cement ratio of a plastic concrete mix. The method is based on the measurement of turbidity of water-cement slurry separated out of a concrete mixture by pressure sieving. Consistent results were obtained for air-entrained and non-air-entrained concrete. Statistical analyses of the test results have shown that this meter can measure the water-cement ratio of fresh concrete with an accuracy of +/-0.01 on the water-cement ratio scale for a single test at a 90% confidence interval. The equipment will cost less than $10,000. If the method works as well in the field as it does in the laboratory, accurate determination of water-cement ratio could dramatically improve the ability of the concrete industry to ensure the quality of concrete construction.

• Record URL:
  • https://doi.org/10.3141/1532-11
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=KANSAS+WATER-CEMENT+RATIO+METER%3a+PRELIMINARY+RESULTS&author=M.+Hossain&author=J.+Koelliker&author=H.+Ibrahim&author=J.+Wojakowski&publication_year=1996
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309059046
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1532, Advancements in Concrete Materials Technology.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Hossain, M
  • Koelliker, J
  • Ibrahim, Haidi
  • Wojakowski, J
• Publication Date: 1996

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 73-79
• Serial:
  • Transportation Research Record
  • Issue Number: 1532
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accuracy; Concrete; Concrete construction; Costs; Equipment; Field tests; Fresh concrete; Measuring instruments; Prototypes; Quality control; Statistical analysis; Strength of materials; Turbidity; Water cement ratio
• Uncontrolled Terms: Concrete strength; Field measurements
• Old TRIS Terms: Equipment cost; Test results; Water cement slurry
• Subject Areas: Bridges and other structures; Construction; Data and Information Technology; Finance; Highways; Materials; I32: Concrete; I50: Construction and Supervision of Construction;

Filing Info

• Accession Number: 00727338
• Record Type: Publication
• ISBN: 0309059046
• Files: TRIS, TRB
• Created Date: Oct 22 1996 12:00AM