An investigation of the various properties of sand as affecting its use in concrete and mortar . rength Tests Tlie test pieces v/ere kept immersed In v/ater inthe storing pans for a period of 7, 28, 90 days aftermixing. As soon as the pieces v;ere taken out ofwater, they v;ere taken to the testing laboratory andtested for their strength in tension and compression. The usual practice for compression test is tohave one inch cubes as the test pieces, but it wasthought that the cylinders would give better these cylinders are under compression, a columnaction and shearing stress devel
An investigation of the various properties of sand as affecting its use in concrete and mortar . rength Tests Tlie test pieces v/ere kept immersed In v/ater inthe storing pans for a period of 7, 28, 90 days aftermixing. As soon as the pieces v;ere taken out ofwater, they v;ere taken to the testing laboratory andtested for their strength in tension and compression. The usual practice for compression test is tohave one inch cubes as the test pieces, but it wasthought that the cylinders would give better these cylinders are under compression, a columnaction and shearing stress developes. The machine for testing the briquettes v/as a1000 pouiid Rlehle shot testing machine as shovm onpage (23). The cylinders v;ere tested in a 60,000 poundmotor driven testing machine, manufactured by Tin-ius Olsen 8: Co., as shovm on page (25). The cylinders were placed on a spherical com-pression block, and betv/een tv/o blotters so that thepressure vrould be more evenly distributed. On page25 to 30 is shovm the compressive and tensile strengthof each mortar in pounds per square inch. 23. Tensile Testing Machine 24
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Keywords: ., bookcentury1900, bookdecade1910, bookidinvestigatio, bookyear1916
