Correlation Between Laboratory Accelerated Freezing and Thawing and Weathering at Treat Island, Maine

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Title: Correlation Between Laboratory Accelerated Freezing and Thawing and Weathering at Treat Island, Maine

Author(s): Thomas B. Kennedy and Katherine Mather

Publication: Journal Proceedings

Volume: 50

Issue: 10

Appears on pages(s): 141-172

Keywords: no keywords

Date: 10/1/1953

Abstract:
Six coarse and eight fine aggregates were used in 48 combinations to make concrete specimens, all with the same water-cement, ratio, air content, and slump for comparative testing in accelerated freezing and thawing and ex-posure to natural weathering at mean-tide elevation at Treat Island, Me. The two types of exposure, aggregates used, test procedures, and results of dynamic testing of concrete specimens in both exposures are described. A summary is included of the examination of some of the concrete specimens and hypotheses suggested to explain differences in results in the two exposures, and a discussion of the relation of difference between thermal coefficients of coarse aggregate and mortar and durability factor found in these tests. The appendix contains more detailed information on the examination of the con-crete and related discussion of other factors believed to be important in explaining results. Comparison of laboratory and field resuks indicates that each aggregate combination behaves in an individual manner in each exposure, as influenced by differences in materials and in exposures. Prediction of behavior in one type of exposure from behavior in another cannot be made unless all the differences between the two can fully be evaluated, which is not yet possible.