Manual of recommended practice for railway engineering and maintenance of way (1905)
American Railway Engineering and Maintenance-of-Way Association · Chicago, Ill. : The Association · leaf 124
ided into two classes: (i) Normal tests, or those made in either air or water maintained at MASONRY. 113 about 21° C. (70° F.), and (2) accelerated tests, or those made in air,steam or water at a temperature of 45° C. (115° F.) and upward. Thetest pieces should be allowed to remain 24 hours in… … Fig. 5.—Form of Clip. Normal Test. be made, upon a clean glass plate [about 10 cm. (3.94 in.) square], fromcement paste of normal consistency. 50. A pat is immersed in water maintained as near 21° C. (70° F.)as possible for 28 days, and observed at intervals. A similar pat ismaintained in air at…
Railroad engineering · Railroads
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