The Sand Equivalent Mechanical Shaker is recommended for labs performing sand equivalent tests on a regular basis. Positive DC drive assures precise speed and stroke and eliminates errors inherent in hand shaking or with less expensive belt-driven or AC motor driven machines. A timer selection switch gives options of precise fixed times of 45 seconds and 10 minutes as used in sand equivalent and durability index tests. The 8in (203mm) throw at 175cpm is smooth, quiet, and efficient. The 1/8hp DC gear motor with sealed gear box and other mechanical parts are housed in a sturdy metal case. The hinged safety cover with 3-1/2in (89mm) high front and top viewing windows must be closed to operate the shaker. Green start and red emergency stop buttons are provided. Test cylinder is held securely by base pin and spring-loaded holder on stoppered end.
The Sand Equivalent Mechanical Shaker is also used in the Durability Index Test which measures the relative resistance of an aggregate to producing such undesirable clay-like fines when subjected to degradation. In either application, the sample to be tested is placed in special solution of calcium chloride, formaldehyde, and glycerine. After shaking the cylinder with a Sand Equivalent Shaker, it is allowed to stand for a 20 minute sedimentation period. Readings are taken on the cylinder scale for the level of the top of the clay suspension, and for the sand level. The Sand Equivalent is the sand reading divided by the clay reading x 100.
Overall Dimensions: 35x14x20in (889x356x508mm), WxDxH; allow 10in (254mm) additional height for opening of safety cover.
Electrical 115V / 60Hz / 1.3Amps
Meets Test Methods:
ASTM D 2419