MODULE 5: UNIT 2 Rigid Pavement Flashcards
distribute wheel loads by the beam action of the portland cement concrete (PCC) slab, which is made of a material that has a high modulus of elasticity, on the order of 4 to 5 million lb/in2
.
Rigid pavements
_________ distributes the wheel loads over a large area of the pavement, thus reducing the high stresses experienced at the surface of the pavement to a level that is acceptable to the subgrade soil.
beam action
The design procedure for rigid pavements presented in the AASHTO design guide is also based on the field results of the __________.
AASHO Road Test
applicable to jointed plain concrete pavements, jointed reinforced concrete pavements, and continuously reinforced concrete pavements.
AASHTO design procedure
do not have slab-reinforcing material and can have doweled joints (steel bars to transfer loads between slabs or undoweled joints.
Jointed plain concrete pavements
(JPCP)
The traverse joints between slabs are
spaced at about ________ ft.
10 to 13
have steel reinforced slabs with joints that are 40 ft or more apart.
Jointed reinforced concrete pavements (JRCP)
do not have traverse expansion/contraction joints, necessitating the use of extensive steel-bar reinforcement in the slab.
continuously reinforced concrete pavements (CRCP)
True or false:
The idea with both jointed-reinforced and continuously-reinforced pavements is to permit slab cracking but to provide sufficient slab reinforcement to hold the cracks tightly together to ensure load transfer
true
The design procedure for rigid pavements is based on a selected reduction in ________ and is similar to the procedure for flexible pavements.
serviceability
instead of measuring pavement strength by using a structural number, the thickness of the ________ is the measure of strength.
PCC slab
True or false:
The final point to be covered with regard to pavement design relates to the case where there are multiple lanes of a highway (such as an interstate) in one direction.
True
