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Transportation CE 150 > Flexible and Rigid Pavements > Flashcards

Flexible and Rigid Pavements Flashcards

1
Q

What is design?

A

Conceive/develop plans for something to serve a specific function

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2
Q

What is the function of the pavement?

A

Provide vehicle access between two points under all climate conditions. Smooth, Durable, and safer.

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3
Q

Where are we at in Pavement Design?

A

Transitioning from empirical to mechanistic

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4
Q

Two types of flexible pavements?

A

Asphalt concrete

Surface treatments

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5
Q

Four types of rigid pavements

A

Jointed Plain Concrete Pavement (JPCP)

Jointed Reinforced Concrete Pavement (JRCP)

Continuously Reinforced Concrete Pavement (CRCP)

Prestressed Concrete Pavement (PCP)

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6
Q

Three Composite Pavements

A

AC overlaid PCCP
AC w/ cemented bases
White topping

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7
Q

Conventional flexible pavement layers

A 
(Seal Coat)
Surface course
(Tack coat)
Binder course
(Prime coat)
Base Course
Subbase course
Compacted subgrade
Natural subgrade
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8
Q

Typical # of layers for flexible pavement?

A

3-4 layers

```
Asphalt
Base
Subbase
subgrade
Binder in between
~~~

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9
Q

Layers in rigid pavements

A

PCC
Base/subbase
Subgrade

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10
Q

Typical # of layers in rigid pavement?

A

2-3 layers

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11
Q

Design life of rigid pavements

A

30-40 years

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12
Q

Pros (2) and cons (1) of rigid pavements (Opposite for flexible)

A

Pro: Lower maintenance cost
High flexural strength
Con: Lower ride quality due to expansion joints

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13
Q

Function of base/subbase of flexible pavements

A

Structural support

Sub-drainage/pumping prevention

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14
Q

Function of base/subbase of rigid pavements

A

Needed for heavy traffic

Improve drainage & prevent pumping

Reduce the effect of frost action

Control subgrade shrinking and swelling

Provide a smooth construction platform

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15
Q

Design life of flexible pavements

A

10-20 years

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16
Q

Pavement design factors (5)

A 
Traffic loading
Environment
Materials
Failure Criteria
Reliability
17
Q

Pavement design factors AASHTO (11)

A 
Traffic loading
Environment
Materials
Failure Criteria
Reliability
\+
Performance Period
Serviceability
Layer coefficients
Drainage coefficients
Structural numbers
Layer thickness
18
Q

Stresses in rigid pavements

A

Wheel load

Temperature change
(Expansion and contraction)
(curling)
(Moisture change and freezing)

Volumetric change in subgrade

Loss of continuity in support

19
Q

Four types of PCCP joints (to prevent cracking due to temp and moisture change)

A

Contraction (transversal)
Expansion (transversal)
Construction (transversal)
Longitudinal

Transportation CE 150 (6 decks)

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