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COLD
REGIONS RESEARCH AND ENGINEERING LABORATORY
(CRREL)/ VTT COOPERATIVE STUDY OF DURABILITY OF HIGH-STRENGTH CONCRETE |
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| In October 1991, nine 6- by 6- by 21-in. concrete beans were placed at Treat Island for exposure testing in a cold region marine environment. The objective was to measure the freeze-thaw durability of nonair-entrained concrete made with very fine mineral fillers. Three mixtures were developed for testing: one contained slag and silica fume as the filler, another contained rock dust and some silica fume as the filler, and the third mix was a conventional air-entrained mix as the control. The Mixture Table shows the mixture proportions for a cubic yard of concrete using saturated-surface dry (SSD) aggregate. Results from freeze-thaw testing at CRREL indicate that Mixtures A&C passed ASTM C 666, Procedure B Testing, whereas Mixture B did not. Further lab tests are planned in conjunction with the results from Treat Island. |