. Journal of electricity. s, or pigs, were constructed asillustrated in Figure 1, the legs being provided for thegreater accuracy obtainable in reading the radius of the cement cylinder was in., and theradius of the leg measured to the center of the ball asshown was in. Duplicate samples were made upfrom cement of various degrees of fineness and of theproportions as stated in the following table, and afterthe initial setting, were placed in water, and kept un-der water throughout the experiment. A. Neat cement. B. Cement (total volume taken equal to that used in A)passing
. Journal of electricity. s, or pigs, were constructed asillustrated in Figure 1, the legs being provided for thegreater accuracy obtainable in reading the radius of the cement cylinder was in., and theradius of the leg measured to the center of the ball asshown was in. Duplicate samples were made upfrom cement of various degrees of fineness and of theproportions as stated in the following table, and afterthe initial setting, were placed in water, and kept un-der water throughout the experiment. A. Neat cement. B. Cement (total volume taken equal to that used in A)passing 200-mesh sieve; sand [diameter of particles in.( mm.) to in. ( mm.)] was added equal involume to the particles of cement retained on 200-mesh sieve. C. Cement less than in. ( mm.) in diameterresulting from total volume taken equal to that used in [diameter of particles in. ( mra.) to in.( mm.)] was added equal in volume to particles of ce-ment Fig. 1.—A receptacle or pig for testing the expansion of concrete D. Cement less than in. ( mm.) in diameterresulting from total volume taken equal to that used in A;sand [diameter of particles in. ( mm.) to in.( mm.)] was added equal in volume to the particles ofcement removed. E. Cement less than in. ( mm.) in diameter,resulting from total volume taken equal to that used in A;sand [diameter of particles in. ( mm.) to in.( mm.)] was added equal in volume to particles of ce-ment removed. Samples of each of the above mixtures were brokenafter a seven-day interval with the following results: A Slightly above 7850 lbs. per sq. in. (553 kg. per sq. cm.) B. Slightly above 7850 lbs. per sq. in. (553 kg. per sq. cm.) C. Slightly above 7819 lbs. per sq. in (551 kg. per sq. cm.) D. SlightlV above 7850 lbs. per sq. in. (553 kg. per sq. cm.) E. Slightly above 5978 lbs. per sq. in. (421 kg. p
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Keywords: ., bookcentury1900, bookdecade1910, bookidjo, booksubjectelectricity
