SOME OBSERVATIONS ON THE MECHANICS OF ALKALI-AGGREGATE REACTION

VISUAL FEATURES ARE DESCRIBED OF ALKALI-AGGREGATE REACTION IN CONCRETE WHEREBY REACTION MAY BE IDENTIFIED NOT ONLY AS HAVING OCCURRED BUT PARTICULARLY AS HAVING BEEN A CAUSE OF PHYSICAL DAMAGE. DISCUSSION BY M. A. SWAYZE, W. C. HANSEN, AND W . C. HANNA IS INCLUDED. SWAYZE EMPHASIZES THE CONTRIBUTION TO PHYSICAL DAMAGE. "IS MADE THROUGH DIRECT ENLARGEMENT, IN PLACE, OF THE AFFECTED PIECES OF AGGREGATE." HANSEN REITERATES THE HYPOTHESIS THAT EXPANSION IS DUE TO OSMOSIS AND HYDROSTATIC PRESSURE. HANNA QUESTIONS THE USE OF THE WORD "ALKALI" UNLESS LIME IS INVOLVED AND INQUIRES ABOUT THE ORIGINAL ALKALI CONTENT OF THE CEMENTS. /PCA/

• Authors:
  • Brown, L S
• Publication Date: 0

Media Info

• Serial:
  • Portland Cement Assoc R & D Lab Bull
  • Issue Number: 0

Subject/Index Terms

• TRT Terms: Alkali; Alkali aggregate reactions; Expansion; Hydrostatic pressure; Osmosis
• Old TRIS Terms: Alkalies
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213504
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 54
• Files: TRIS
• Created Date: May 25 1970 12:00AM