Roosevelt Standard | 1927-12-22 | Page 5 | Sand Used in Concrete Can Easily be Tested

sand used in concrete can easily be tested sand to be used in mailing concrete can bo be tested with tin an ordinary quart milk bottle or fruit jar the jar 1 ar is filled to a depth of two tw 0 inches with a representative sample of tile the sand water Is then added until the bottle or the jar Is about fourths full fill the mixture la Is then shaken vigorously for one minute the last few shakes being in a sidewise direction I 1 after the shaking hasteen has been completed the jar Is allowed to stand for one hour it if lit at the end of this time the sri ahas dhas d has on it a layer of silt more t alian an one eighth ath inch thick it Is un for concrete work unless the silt Is removed by washing