chapter 3 rigid pavement - DOT On-Line Publications - Department ...

F?iWA TECtiICAL ADVISORY T 5080.17
July 14, 1994
ATTACHMENT I
(3) Mixers are to be examined periodically to
detect changes in condition due to
accumulation of hardened concrete or blade
wear. A copy of the manufacturer's design,
showing dimensions and arrangements of
blades, should be available at the plant at
all times.
B. Truck Mixers
4. Weather
(1)
(2)
(3)
(4)
A.
(I)
(2)
- B.
(1)
Mixers should be equipped with a metal plate
that indicates mixing speed, capacity, mixing
revolutions, agitating speed and agitating
capacity.
Mixers should be equipped with a revolution
counter.
Mixers are to be examined to determine
satisfactory interior condition, that is, no
appreciable accumulation of hardened concrete
and no excessive blade wear. A copy of the
manufacturer's design, showing dimensions and
arrangements of blades, should be available
at the plant at all times.
Charging and discharge openings and chutes
should be in good condition.
Hot Weather
When concreting during hot weather, is plant
equipped to cool ingredients? Is equipment
available to produce acceptable ice?
How are aggregates cooled? If by sprinkling,
is provision made to account for excessive
water?
Cold Weather
When concreting during cold weather, is plant
equipped to heat ingredients to produce
concrete of applicable minimum temperature.
3.10.28