Cement-aggregate reaction in concrete of a canadian bridge

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Journal titleProceedings of the American Society of Testing and Materials
Pages10431056; # of pages: 14
Subjectconcrete admixtures; bases (chemistry); expansion; cement; freeze thaw cycles; Bridges; Concrete; adjuvant; base (chimie); dilatation; ciment; gel degel
AbstractA study was made of a concrete bridge deck which had expanded abnormally over a period of more than 25 years. The two deck sections involved, many with different aggregate, were found to have been affected by different types of cement-aggregate reaction. One section had been seriously affected by alkali-aggregate reaction involving mainly a phyllite in the coarse aggregate, but the actual expansion and extensive deterioration of the concrete was attributed in large part to freezing and thawing under adverse moisture conditions. A feature of this case was the failure of the mortar bar test to reveal potential reactivity in the source material in spite of other evidence. Some possible explanations are considered. In the second section, abnormal expansion was probably due to the sand component which was shown to be reactive in the Conrow test, ASTM Method C 342.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number4592
NPARC number20375069
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Record identifiercdc36f49-0c1c-4aed-a668-91e76d632ada
Record created2012-07-23
Record modified2016-05-09
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