EVALUATION OF A CHEMICAL TECHNIQUE TO DETERMINE WATER AND CEMENT CONTENT OF FRESH CONCRETE

This report presents information obtained from an evaluation of a chemical procedure for determining the water and cement content of a concrete in the plastic state. The procedure uses chloride ion titration to determine water content and flame photometry (calcium signature) to determine cement content. This study evaluated the procedure to determine if it could be used to estimate concrete strength potential and to define to what extent test results are influenced by aggregate type, aggregate moisture conditions, aggregate absorption capacity, concrete mix proportions, mix time, and time of sampling. The fieldworthiness of the system was also evaluated. Results indicate that the procedure can rapidly (approximately 15 min) determine the water and cement content of fresh concrete and that it can be used to predict strength potential with an accuracy equal to that of predicting strength from known mix proportions. Aggregate type was the only major concrete parameter that significantly influenced test results. Although aggregate moisture condition, mix proportions, and length of mixing time also influenced test results, their influences were minor. The field tests have indicated that the system is fieldworthy and mobile.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1975/558/558-012.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=EVALUATION+OF+A+CHEMICAL+TECHNIQUE+TO+DETERMINE+WATER+AND+CEMENT+CONTENT+OF+FRESH+CONCRETE&author=P.+Howdyshell&publication_year=1975
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• Supplemental Notes:
  • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Howdyshell, Paul A
• Conference:
  • 54th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia
  • Date: 1975-1-13 to 1975-1-17
• Publication Date: 1975

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 104-113
• Monograph Title: Recent developments in accelerated testing and maturity of concrete
• Serial:
  • Transportation Research Record
  • Issue Number: 558
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accuracy; Aggregates; Cement content; Chemical tests; Concrete; Field tests; Flame photometry; Forecasting; Mix design; Mixing; Moisture content; Polymer concrete; Sampling; Strength of materials; Test procedures; Time; Volumetric analysis
• Old TRIS Terms: Aggregate characteristics; Mixing time
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00131698
• Record Type: Publication
• ISBN: 0309024668
• Files: TRIS, TRB
• Created Date: Jun 5 1976 12:00AM