IDENTIFICATION OF CONCRETE ADMIXTURES BY DIFFERENTIAL THERMAL ANALYSIS IN OXYGEN

It is often desirable to identify a concrete admixture uniquely before its use to avoid adverse reactions. Methods such as IR or UV spectroscopy only broadly classify the type of admixture while chemical analysis is difficult and results are often inconclusive, especially for admixtures containing lignosulphonates. The use of DTA under 250 kpa of oxygen provides a technique for identifying admixtures. Each admixture gives a unique pattern of exothermic peaks thus enabling its identification provided a known sample is available. Admixtures containing salts of hydroxycarboxylic acids show exotherms up to 700 degrees c while those with free acids or sugars show only exotherms in the range 200-400 degrees c. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Corporate Authors:

  Pergamon Press, Incorporated

  Maxwell House, Fairview Park
  Elmsford, NY  United States  10523
• Authors:
  • Milestone, N B
• Publication Date: 1984-3

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 207-214
• Serial:
  • Cement and Concrete Research
  • Volume: 14
  • Issue Number: 2
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Admixtures; Chemical analysis; Concrete; Oxygen; Spectroscopy; Thermal analysis; Waste products
• ITRD Terms: 4736: Admixture; 4563: By product; 4755: Concrete; 7108: Oxygen; 7152: Thermal analysis
• Subject Areas: Highways; Materials; Planning and Forecasting; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00392434
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Mar 29 1985 12:00AM