ASSESSMENT OF EXPERIMENTAL EVIDENCE FOR MODELS OF HYDRATED PORTLAND CEMENT

THE RELATIVE MERITS OF THE NEW AND OLD MODELS OF HYDRATED PORTLAND CEMENT ARE PRESENTED WITH AN ASSESSMENT OF PUBLISHED AND UNPUBLISHED EVIDENCE RELATING TO THE MODELS. THE CHIEF AREAS OF EVIDENCE DISCUSSED ARE THOSE PERTAINING TO SURFACE ENERGY OF CALCIUM-SILICATE-HYDRATE MATERIAL (C-S-H) BY HEAT OF SOLUTION, STOICHIOMETRY OF C-S-H, AND THE EFFECT OF INTERLAYER REHYDRATION OF D-DRIED C-S-H ON DENSITY MEASUREMENTS, C-AXIS AND HYDRATED RADII CALCULATIONS, LENGTH AND WEIGHT CHANGE ISOTHERMS, AND POROSITY AND MECHANICAL PROPERTY CORRELATIONS. A NEW TECHNIQUE OF MEASURING THE FLOW RATE OF HELIUM INTO INTERLAYER SPACES IS DISCUSSED IN TERMS OF EVIDENCE IT PRODUCES. IT IS CONCLUDED THAT THE NEW MODEL OF HYDRATED PORTLAND CEMENT MORE ACCURATELY ACCOUNTS FOR ITS NATURE AS INDICATED BY A WIDE VARIETY OF PROPERTIES. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1971/370/370-002.pdf
• Supplemental Notes:
  • Sponsored by Committee on Basic Research Pertaining to Portland Cement and Concrete and presented at the 50th Annual Meeting. 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:
  • FELDMAN, R F
• Publication Date: 1971

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 8-24
• Monograph Title: Concrete
• Serial:
  • Highway Research Record
  • Issue Number: 370
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Calcium; Gels; Hydrates; Interfaces; Mathematical models; Physical properties; Portland cement; Reviews; Silicates; Surface energy
• Uncontrolled Terms: Models
• Old TRIS Terms: Calcium silicate gel; Interlayer spaces
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00214091
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Apr 17 1972 12:00AM