Aberthaw tests of concrete in sea water . anuary 18,1909. Speci-men immersed February 23, 1909. Mixed the alum thoroughly with thedry cement; dissolved the soap inwater. The specimen when cast quakedwith light tamping. Length 16 ft. \y2 in. Average sec-tional area sq. ft. Volume cu. ft. Net Volume ofConcrete Gross Weight 4050 lb. Net Weight ofConcrete Do. per cu. ft. Condition March 3, 1910 This specimen had a very smallcrack on its face when placed. Whenexamined it was found to be crackedpractically all the way through. Thecorners were eroded in places, whichmay
Aberthaw tests of concrete in sea water . anuary 18,1909. Speci-men immersed February 23, 1909. Mixed the alum thoroughly with thedry cement; dissolved the soap inwater. The specimen when cast quakedwith light tamping. Length 16 ft. \y2 in. Average sec-tional area sq. ft. Volume cu. ft. Net Volume ofConcrete Gross Weight 4050 lb. Net Weight ofConcrete Do. per cu. ft. Condition March 3, 1910 This specimen had a very smallcrack on its face when placed. Whenexamined it was found to be crackedpractically all the way through. Thecorners were eroded in places, whichmay have been caused by bumps froma floating obstacle. Condition December 17, 1913 Face badly eaten just above lowwater mark. All four edges and backbadly eaten for 3 feet below lowwater mark. Corners at bottom faces slightly pitted. Not muchaction above mid-water line. Condition June 9, 1920^ Concrete between high and lowwater badly rotted. I^ess than one-half of the original area of the speci-men remains between high and Sample No. 231913 Sample No. 231920 [30] ACTION OF SEA WATER O N CONCRETE
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectconcret, bookyear1920
