Volume instability of porous solids: part 2: dissolution of porous silica glass in sodium hydroxide

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AuthorSearch for:
TypeArticle
Journal titleJournal of Materials Science
ISSN0022-2461
Volume19
Issue8
Pages24732480; # of pages: 8
Subjectsilica glass; corrosion tests; dimensional stability; naoh solution; glass dimensional changes; expansion; contraction; calcium chloride (cacl2) effects; Concrete; verre de silice; essai de corrosion; stabilite dimensionnelle
AbstractDimensional changes of porous 96% silica glass have been determined during exposure to aqueous NaOH solution. Depending on the thickness of the specimen (1, 3, 4, or 8 mm) and the concentration of the alkali (0.1, 0.4, 0.8, 1.6, 3.2 and 6.4 M), either expansion or contraction or both were observed, the maximum being 0.7%. The features of the extension curves cannot yet be fully explained, but the results suggest that dissolution of glass leads to expansion and that surface reaction and chemisorption lead to contraction. The presence of CaCl[2] in the solution in 1M concentration significantly retards dissolution and expansion.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-P-1247
NRC number23924
2114
NPARC number20373909
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Record identifierc1beb1e6-ae04-4075-9dba-8cc4128d2faa
Record created2012-07-23
Record modified2016-05-09
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