Detection of alkali-silica reaction swelling in concrete by staining

Patent · Tue Apr 14 00:00:00 EDT 1998

OSTI ID:871471

Carey, J William ^[1]

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1. Santa Fe, NM

A method using concentrated aqueous solutions of sodium cobaltinitrite and rhodamine B is described which can be used to identify concrete that contains gels formed by the alkali-silica reaction (ASR). 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 (LANL), Los Alamos, NM
• DOE Contract Number: W-7405-ENG-36
• Assignee: Regents of University of California (Los Alamos, NM)
• Patent Number(s): US 5739035
• OSTI ID: 871471
• Country of Publication: United States
• Language: English

Related Subjects

/436/
alkali-poor
alkali-silica
applied
aqueous
aqueous solution
aqueous solutions
asr
ca--si
chemically
cobaltinitrite
concentrated
concentrated aqueous
concrete
contains
described
detection
discriminate
distinct
environmental
formed
gels
health
identified
identify
k-rich
method
na--k--ca--si
pink
rapidly
reaction
readily
rhodamine
risk
sodium
sodium cobalt
solutions
staining
swelling
yellow