Chicago : Engineering and Contracting Pub. Co. · leaf 224
b is just covered by the bituminousmaterial. The Bunsen flame should be ap-plied in such a manner that the temperatureof the material in the cup is raised at the rateof about 5° C. per minute. From time totime the testing flame is inserted in the open-ing in the cover to about half way betweenthe…
Buildings
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