Detection Of Concrete Deterioration By Staining
Patent
·
OSTI ID:879514
- Santa Fe, NM
A method using concentrated aqueous solutions of sodium cobaltinitrite and a rhodamine dye is described which can be used to identify concrete that contains gels formed by the alkali-silica reaction (ASR), and to identify degraded concrete which results in a porous or semi-permeable paste due to carbonation or leaching. These solutions present little health or environmental risk, are readily applied, and rapidly discriminate between two chemically distinct gels; K-rich, Na--K--Ca--Si gels are identified by yellow staining, and alkali-poor, Ca--Si gels are identified by pink staining.
- Research Organization:
- Los Alamos National Laboratory
- DOE Contract Number:
- W-7405-ENG-36
- Assignee:
- The Regents of the University of California (Los Alamos, NM)
- Patent Number(s):
- US 5955372
- Application Number:
- 09/060513
- OSTI ID:
- 879514
- Country of Publication:
- United States
- Language:
- English
Insitu identification of ASR products in concrete
|
journal | May 1988 |
Further study of an in-situ identification method for alkali-silica reaction products in concrete
|
journal | September 1989 |
A staining technique for the identification of sulphates in aggregates and concretes
|
journal | September 1975 |
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