A SETTING PROBLEM INVOLVING WHITE CEMENT AND ADMIXTURE

Quick setting was experienced when a particular water- reducing admixture was used with certain white cements containing less than 1.6 percent SO3. These cements set normally at normal temperature with out the admixture but set rapidly in the presence of the admixture, both at normal and at high concreting temperatures. Other cements from the same mill with higher SO3 contents gave normal setting times, both with and without the admixture and irrespective of temperature. investigation revealed that, in the presence of the admixture, consumption of SO3 was accelerated in the case of the problem cements and that insufficient SO3 remained in solution in the period immediately following mixing to properly control the hydration reactions of C3A. Other factors also were involved, such as inherent clinker reactivity and the state of dehydration of the gypsum.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1976/564/564-003.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=A+SETTING+PROBLEM+INVOLVING+WHITE+CEMENT+AND+ADMIXTURE&author=K.+Greene&publication_year=1976
• Availability:
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Chemical Additions and Admixtures for Concrete. 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:
  • Greene, K T
• Conference:
  • 54th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia
  • Date: 1975-1-13 to 1975-1-17
• Publication Date: 1976

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 21-26
• Monograph Title: Concrete Admixtures
• Serial:
  • Transportation Research Record
  • Issue Number: 564
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Admixtures; Clinkers; Concrete setting; Gypsum cement; Hydration; Portland cement; Water reducing agents
• Uncontrolled Terms: Setting time
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00135024
• Record Type: Publication
• ISBN: 0309024749
• Files: TRIS, TRB
• Created Date: Jul 13 1976 12:00AM