A simple environmentally friendly, and chemically specific method for the identification and evaluation of the alkali-silica reaction
- Los Alamos National Lab., NM (United States). Geology and Geochemistry Group
One of the principal mechanisms of premature degradation of concrete is the alkali silica reaction, in which an alkali-rick silica gel froms around and within some reactive aggregate grains, in pores, along fractures, and within paste. A rapid, dual staining method is described whereby reaction products associated with the alkali-silica reaction (ASR) are readily identified by their pink or yellow color following treatment in the laboratory or field. The method is based on both the compositional and physical characteristics of the ASR gel; hence, it provides greater information than non-chemical-specific techniques (such as the uranyl acetate method). In addition, the chemicals used in the staining method pose minimal health risks and are environmentally benign.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 561927
- Journal Information:
- Cement and Concrete Research, Vol. 27, Issue 9; Other Information: PBD: Sep 1997
- Country of Publication:
- United States
- Language:
- English
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