EXAMINATION OF CEMENT PASTES HYDRATED PHASES, AND SYNTHETIC PRODUCTS BY X-RAY DIFFRACTION

Pastes of three cements were examined by X-ray diffraction at five ages in seven laboratories. Six of the laboratories used X-ray diffractometers and one used a focusing camera of the Guinier type. Six laboratories examined hydrated phases and synthesized hydrates. Pastes of all three cements were mixed at water-cement ratios of 0.35 and 0.65 and were examined after hydration had been stopped at ages of 1, 7, 28, 90, and 365 days. Pastes of Type I cement at 0.35 water-cement ratio contained ettringite, tetracalcium aluminate monosulfate-12-hydrate, calcium hydroxide, calcium silicate hydrate gel, and residual cement constituents. Tetracalcium aluminate monosulfate-12-hydrate was detected at 7 days and increased thereafter at the expense of ettringite. Compositions of pastes of this cement at 0.65 water-cement ratio were similar to those of the pastes 0f 0.35 water-cement ratio; the sequences of hydrates appearing and increasing, and cement constituents diminishing and in some instances disappearing, were more conspicuous.

• Corporate Authors:

  U.S. Army Waterways Experiment Station

  3909 Halls Ferry Road
  Vicksburg, MS  United States  39180-6199
• Authors:
  • Mather, K
• Publication Date: 1972-4

Media Info

• Pagination: 68 p.

Subject/Index Terms

• TRT Terms: Cement; Cement paste; Diagnostic tests; Diffraction; Hydration; Materials; Nondestructive tests; Pastes; Synthetics; Water cement ratio; X ray analysis; X rays
• Uncontrolled Terms: X-ray diffraction
• Old TRIS Terms: Periodic variations; X ray diagnostics
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00145723
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: WES-MP-C-72-5 Misc Paper
• Files: TRIS
• Created Date: Jan 16 1977 12:00AM