NEW CONCERN OVER ALKALI-AGGREGATE REACTION
There are three reasons why there is new concern over alkali-aggregate reaction: (1) The simple cheap precaution of specifying 'low-alkali cement,' and obtaining it at no increase in price over cement not required to be low-alkali, will no longer be widely available. (2) Aggregates not previously regarded as reactive are being found to have reacted in concrete in old structures and to be associated with significant cracking and damage. (3) Serious early damage to concrete structures has occurred in places where it was previously unknown, especially in north Germany. Aggregate sources and rock type are discussed. A re-examination is made of the state of knowledge and the state of the use of knowledge in this area.
- Also pub. as Army Engineer Waterways Experiment Station, Vicksburg, Miss. Concrete Technology Information and Analysis Center, CTIAC-17.
U.S. Army Waterways Experiment Station3909 Halls Ferry Road
Vicksburg, MS United States 39180-6199
- Mather, B
- Publication Date: 1975-5
- Pagination: 23 p.
- TRT Terms: Aggregates by source; Alkali aggregate reactions; Alkali metal compounds; Alkalinity; Cement; Chemical reactions; Concrete; Cracking; Defects; Expansion; Fracture mechanics; Pavement distress; Pavements; Rocks; Silicon dioxide; Structures
- Uncontrolled Terms: Aggregate sources; Concrete cracking; Low alkali cement
- Old TRIS Terms: Types
- Subject Areas: Bridges and other structures; Geotechnology; Highways; Materials; Pavements;
- Accession Number: 00091801
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: AEWES-MiscPaperC75-3Final Rpt.
- Files: TRIS
- Created Date: Sep 10 1975 12:00AM