Title:
Rapid Test of Concrete Expansivity Due to Internal Sulfate Attack
Author(s):
E. Grabowski, B. Czarnecki, J. E. Gillott, C. R. Duggan, and J. F. Scott
Publication:
Materials Journal
Volume:
89
Issue:
5
Appears on pages(s):
469-480
Keywords:
alkali-aggregate reactions; concrete durability; ettringite; expansion; microcracking; temperature; tests; Materials Research
DOI:
10.14359/2410
Date:
9/1/1992
Abstract:
The Duggan test, which involves measuring length changes of concrete cores that are immersed in water following a thermal cycle, has been under development at CN-Research in Montreal. Test results are obtained in less than a month and are intended to give a measure of concrete durability. Results of this investigation indicate that expansion in the Duggan test is not due to alkali-aggregate reaction (AAR) or to recovery with water absorption on immersion from drying shrinkage in the thermal cycle. The major cause of expansion measured in the test appears to be due to delayed ettringite formation.