LADOTD STRUCTURAL CONCRETE
INSPECTION 2 QUESTIONS &
ANSWERS
equipment, procedures, material supply - ANSWERWhiat should be discussed at a
prepour conference?
the distance between bars, the distance from bar ends to side forms, and the
straightness of bars - ANSWERWhat should be checked on reinforcing steel during a
prepour inspection?
the anticipated deflection under the screen, the finished grade, and the rail elevation -
ANSWERWhat should be considered when establishing the proper elevation of a
transverse screed?
to ensure that the screed will yield proper grade at all points - ANSWERWhat is the
main purpose of the dry run of the transverse screed over the pour unit?
the District Laboratory Engineer - ANSWERWho must approve the PCC Job Mix
Release prior to beginning a pour?
two years - ANSWERHow long is a concrete plant certification valid?
Cement Certificate of Delivery - ANSWERWhat must accompany a shipment of cement
that is to be used in concrete for DOTD projects?
the working face of the stockpiles, and the flow between the batch bin and the weighing
hopper - ANSWERWhich areas must the contractor take aggregate samples from for
job control and verification testing?
revolution counters, drum capacity and rotation speeds, and the water metering system
- ANSWERWhat items should be checked daily on a transit mixer?
place the bucket on a plywood platform - ANSWERWhat is an acceptable procedure for
filling a concrete bucket?
cement grout - ANSWERWhat is used to lubricate tubes for a concrete pumping
operation?
Mixing, placement, consolidation, finishing, straightening, tine finishing, and curing -
ANSWERWhat is the order of operations for pouring a bridge deck?
, Contractor's Qualified Technician - ANSWERWho is responsible for determining the
actual number of mixing speed revolutions to be performed at the plant?
it makes concrete more pourous & more workable? - ANSWERWhat 2 reasons to use
an air entrainment admixture?
80° F - ANSWERAt what ambient air temperature are hot weather practices required to
begin?
it must be removed & replaced - ANSWERWhat must be done to a concrete slab that
froze between the initial and final set?
using a special untoothed rake, or dragging by a shovel - ANSWERWhat 2 methods can
be used to safely move concrete during pouring operations?
slump, amount of water being added, and water cement ratio - ANSWERIf free water
appears on the surface of a slab, what should the inspector check for?
segregation - ANSWERWhat can happen if areas of vibration are allowed to overlap?
it should be removed and discarded - ANSWERWhat should be done to the roll of
material that is carried in front of the screed and deposited at the gutterline?
as soon as the sheen leaves the surface of the concrete - ANSWERWhen should the
finish be applied?
one gallon per 100 SF - ANSWERWhat is the minimum application rate for curing
Compound?
5 days - ANSWERConcrete bridge decks must be covered with burlap material and
cured for at least how many days?
temperature - ANSWERWhat job control test is taken only on an as needed basis?
every fifth lot - ANSWERHow often does the department need to obtain an independent
sample of aggregate stockpiles?
3 layers - ANSWERHow many layers of concrete are placed in a pressure meter bowl?
25 times - ANSWERHow many times does the concrete in a pressure meter bowl need
to be rodded?
subtract the aggregate correction factor from the dial reading - ANSWERHow do you
determine the actual percentage of air in a test specimen when using a pressure meter?
INSPECTION 2 QUESTIONS &
ANSWERS
equipment, procedures, material supply - ANSWERWhiat should be discussed at a
prepour conference?
the distance between bars, the distance from bar ends to side forms, and the
straightness of bars - ANSWERWhat should be checked on reinforcing steel during a
prepour inspection?
the anticipated deflection under the screen, the finished grade, and the rail elevation -
ANSWERWhat should be considered when establishing the proper elevation of a
transverse screed?
to ensure that the screed will yield proper grade at all points - ANSWERWhat is the
main purpose of the dry run of the transverse screed over the pour unit?
the District Laboratory Engineer - ANSWERWho must approve the PCC Job Mix
Release prior to beginning a pour?
two years - ANSWERHow long is a concrete plant certification valid?
Cement Certificate of Delivery - ANSWERWhat must accompany a shipment of cement
that is to be used in concrete for DOTD projects?
the working face of the stockpiles, and the flow between the batch bin and the weighing
hopper - ANSWERWhich areas must the contractor take aggregate samples from for
job control and verification testing?
revolution counters, drum capacity and rotation speeds, and the water metering system
- ANSWERWhat items should be checked daily on a transit mixer?
place the bucket on a plywood platform - ANSWERWhat is an acceptable procedure for
filling a concrete bucket?
cement grout - ANSWERWhat is used to lubricate tubes for a concrete pumping
operation?
Mixing, placement, consolidation, finishing, straightening, tine finishing, and curing -
ANSWERWhat is the order of operations for pouring a bridge deck?
, Contractor's Qualified Technician - ANSWERWho is responsible for determining the
actual number of mixing speed revolutions to be performed at the plant?
it makes concrete more pourous & more workable? - ANSWERWhat 2 reasons to use
an air entrainment admixture?
80° F - ANSWERAt what ambient air temperature are hot weather practices required to
begin?
it must be removed & replaced - ANSWERWhat must be done to a concrete slab that
froze between the initial and final set?
using a special untoothed rake, or dragging by a shovel - ANSWERWhat 2 methods can
be used to safely move concrete during pouring operations?
slump, amount of water being added, and water cement ratio - ANSWERIf free water
appears on the surface of a slab, what should the inspector check for?
segregation - ANSWERWhat can happen if areas of vibration are allowed to overlap?
it should be removed and discarded - ANSWERWhat should be done to the roll of
material that is carried in front of the screed and deposited at the gutterline?
as soon as the sheen leaves the surface of the concrete - ANSWERWhen should the
finish be applied?
one gallon per 100 SF - ANSWERWhat is the minimum application rate for curing
Compound?
5 days - ANSWERConcrete bridge decks must be covered with burlap material and
cured for at least how many days?
temperature - ANSWERWhat job control test is taken only on an as needed basis?
every fifth lot - ANSWERHow often does the department need to obtain an independent
sample of aggregate stockpiles?
3 layers - ANSWERHow many layers of concrete are placed in a pressure meter bowl?
25 times - ANSWERHow many times does the concrete in a pressure meter bowl need
to be rodded?
subtract the aggregate correction factor from the dial reading - ANSWERHow do you
determine the actual percentage of air in a test specimen when using a pressure meter?
