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|  MIL-T-52896B(ME)
Inability to produce one cubic yard of six bag mix concrete within four minutes shall constitute
failure of this test. Demonstrate the ability of the mixer to produce various design strength mixes
by setting the controls for a four bag mix and producing a minimum of one cubic yard of concrete.
Examine the fresh concrete to determine if it is uniform mix. Examine the aggregate for complete
coating with cement paste. Inability of the mixer to produce a uniform mix or to completely coat
the aggregate shall constitute failure of this test.
4.3.2.5 Axle loading. Determine, by weighing, the load on each individual axle under the
following conditions:
a. The water supply tank filled to capacity (see 3.3.1).
b. The coarse aggregate bin filled to capacity (see 3.3.1). The weight of the aggregate
shall be not less than 100 pounds/cubic foot.
c. The sand bin filled to capacity (see 3.3.1). The weight of the sand shall be not less
than 95 pounds/cubic foot.
d. Cement bin filled to capacity (see 3.3.1).
e. Wet and dry admixture systems filled to capacity.
f. All reservoirs, to include fuel tank(s), filled to capacity.
4.3.2.6 Highway speed. Demonstrate the truck's maximum high-gear, highway speed
capability on hard surfaced roadway with the vehicle loaded as specified in 4.3.2.5. Average the
speed for four runs, two in each direction.
4.3.2.7 Gradeability. Demonstrate the gradeability of the truck mixer when loaded as
specified in 4.3.2.5. Demonstrate driving the truck mixer up no less than a 25 percent grade, stop
and park the truck, restart and continue ascending the slope. Demonstrate the ability of the truck
mixer when loaded as specified in 4.3.2.5 to ascend a 3 percent grade at no less than 20 miles per
hour. Demonstrations shall be in accordance with SAE J950.
4.3.2.8 Mixer truck mobility. Mixer truck mobility shall be performed as specified herein.
Permanent deformation, overheating, malfunction, failure to complete any test, or leakage of
lubricants or hydraulic fluids shall be cause for rejection of the first article.
Loading
Terrain
Speed
Primary highway types
50 miles at up to max mph
As specified in 4.3.2.5
Primary highway types
50 miles at up to max mph
Empty
Secondary roads
25 miles at up to 60 percent
As specified in 4.3.2.5
max. mph
Secondary roads
25 miles at up to 60 percent
Empty
max. mph
Off-road terrain
10 miles at safe speeds
As specified in 4.3.2.5
Off-road terrain
5 miles at safe speeds
Empty
10
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