Accession Number:

AD0450059

Title:

MECHANISM AND KINETICS OF EXPANSION IN THE ALKALI-CARBONATE ROCK REACTION,

Descriptive Note:

Corporate Author:

NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF BUILDING RESEARCH

Personal Author(s):

• Gillott, J. E.

Report Date:

1964-05-28

Pagination or Media Count:

25.0

Abstract:

Certain fine-grained argillaceous dolomitic limestones show an increase in solid volume when placed in strong alkali. Mineralogical analysis shows that the dolomite is replaced by magnesium hydroxide brucite, calcium carbonate, and alkali carbonate. This reaction does not account directly for the expansion, as the volume of the solid products is less than the volume of the dolomite. Expansion is shown to be the result of an increase in solid volume that results from water uptake. Author

Descriptors:

• *LIMESTONE
• CHEMICAL REACTIONS
• VOLUME
• MAGNESIUM COMPOUNDS
• HYDROXIDES
• CALCIUM COMPOUNDS
• CARBONATES
• CARBONATE MINERALS
• IONS
• CALCIUM
• MAGNESIUM
• X RAY DIFFRACTION
• X RAYS
• MEASUREMENT
• CHEMICAL ANALYSIS
• QUANTITATIVE ANALYSIS
• HYDRATION

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE