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Title: Detection Of Concrete Deterioration By Staining

Abstract

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.

Inventors:
 [1];  [2]
  1. (Santa Fe, NM)
  2. Santa Fe, NM
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
879514
Patent Number(s):
5955372
Application Number:
09/060513
Assignee:
The Regents of the University of California (Los Alamos, NM)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Guthrie, Jr., George D., and Carey, J William. Detection Of Concrete Deterioration By Staining. United States: N. p., 1999. Web.
Guthrie, Jr., George D., & Carey, J William. Detection Of Concrete Deterioration By Staining. United States.
Guthrie, Jr., George D., and Carey, J William. Tue . "Detection Of Concrete Deterioration By Staining". United States. https://www.osti.gov/servlets/purl/879514.
@article{osti_879514,
title = {Detection Of Concrete Deterioration By Staining},
author = {Guthrie, Jr., George D. and Carey, J William},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {9}
}

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Works referenced in this record:

Insitu identification of ASR products in concrete
journal, May 1988


A staining technique for the identification of sulphates in aggregates and concretes
journal, September 1975


Further study of an in-situ identification method for alkali-silica reaction products in concrete
journal, September 1989