Abstract:
LABORATORY TESTS OF SOUNDNESS OF AGGREGATES BY MEANS OF SODIUM SULPHATE AND MAGNESIUM SOLUTIONS HAVE BEEN FOUND TO CORRELATE WITH FIELD SERVICE WITH SOME AGGREGATES AND NOT WITH OTHERS. A METHOD OF TEST BY FREEZING AND THAWING AND EVALUATION OF RESULTS IS PROPOSED WHICH DIFFERS FROM THAT OF THE AMERICAN SOCIETY FOR TESTING MATERIALS PRINCIPALLY IN THAT THE RESULT IS BASED UPON CUMULATIVE PERCENTAGES RETAINED ON THE SERIES OF SIEVES INSTEAD OF UPON SEPARATION INTO A NUMBER OF SIZES BY THE PASSED AND RETAINED SYSTEM. THIS MAKES IT POSSIBLE TO EVALUATE CORRECTLY THOSE PIECES WHICH ARE CRACKED IN CRUSHING AND SEPARATE IN ONE CYCLE OF FREEZING AND THAWING AND DO NOT SHOW REAL SIGNS OF DISINTEGRATION. THE RESULT OF THE TEST IS EXPRESSED AS THE RATIO OF THE SUM OF THE CUMULATIVE PERCENTAGES RETAINED ON EACH OF THE SIEVES AFTER FREEZING AND THAWING TO THE SUM OF THE CUMULATIVE PERCENTAGES BEFORE THE TEST. /AUTHOR/
Supplemental Notes:
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