Multiquip Mayco Structural Concrete Pump ST-45HRM CE - Manual (Page 66)

PAGE 66 — MAYCO ST-45HRM CE PUMP — OPERATION & PARTS MANUAL — REV. #0 (02/23/04)
Figure 60-A. Slump Test (1/3 Full)
Figure 60-C. Slump Test
(Full-Overflow)
Figure 60-B. Slump
Test (2/3 Full)
Figure 60-D. Slump Test
(Removing Excess Concrete)
Figure 60-E. Slump Test
(Cone Invert)
Figure 60-F. Slump Test
(Measurement)
1. To obtain a representative sample (concrete), take several
samples at three or more regular intervals throughout the
discharge of the mixer or truck. DO NOT take samples at the
beginning or end of the discharge.
2. Dampen the inside of the cone and place it on a smooth,
moist, nonabsorbent, level surface large enough to accom-
modate both the slumped concrete and the slump cone.
Stand on the “foot pieces” throughout the test procedure to
hold the cone firmly in place.
3. Fill the cone 1/3 full by volume (Figure 60-A) and rod 25 times
with a 1.3 cm x 61 cm (1/2” diameter x 24” length) bullet-
pointed steel rod. (This is a specific requirement which will
produce non-standard results unless followed exactly.) Dis-
tribute rodding evenly over the entire cross section of the
sample.
4. Fill cone another 1/3 (Figure 60-B) which will make the cone
2/3 full by volume. Rod this second layer 25 times with the rod
penetrating into, but not through, the first layer. Distribute
rodding evenly over the entire cross section of the layer.
5. Fill cone to overflowing (Figure 60-C). Rod this layer 25
times with rod penetrating into but not through, the second
layer. Distribute rodding evenly over the entire cross section
of this layer.
6. Remove the excess concrete (Figure 60-D) from the top of the
cone, using the tamping rod as a screed.
7. Lift the cone vertically (Figure 60-E) with a slow even motion.
DO NOT jar the concrete or tilt the cone during this process.
( Invert the withdrawn cone, and place it next to, but not
touching the slumped concrete.
8. Lay a straight edge (Figure 60-F) across the top of the
slumped cone. Measure the amount of slump in inches from
the bottom of the straight edge to the top of the slumped
concrete at a point over the original center of the base . The
slump operation must be complete in a maxi
APPENDIX — ST-45HRM C E CONCRETE PUMP SLUMP TEST
BULLET POINTED
STEEL ROD
1/2 DIAMETER
24 INCHES LONG
1/3 FULL
FOOT
PIECE
2/3 FULL
FULL
(OVERFLOW)