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Flashcards in Pavement Management Deck (29)
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1

What is the design purpose of asphalt pavement?

Standard or equivalent wheel load is 18,000 lbs. equivalent single axle load.

2

What are the three components of asphalt?

Aggregate, Cement (AC20), Air Voids

3

Mix I-5 is?

FABC = Fine Aggregate Bituminous Concrete

4

Design criteria or Failure criteria in asphalt can be described as what type of failure?

answer d) all of the above
Performance, Fatigue and Rutting

5

To achieve the proper level of air void, compaction should not take place below what temperature?

175 degrees

6

Water that contributes to frost problems in asphalt pavement comes from/

Answer d) all of the above
Surface Water, Moisture held or drawn through the soil, High water Table

7

Potholes can most effectively be repaired by?

a) removing damaged area and making a full depth repair with proper compaction.

8

Recommended procedure for cutout deeper than 6" is

a) Placing at fault and more than one lift

9

What is the single most important factor affecting the life of the pavement?

Compaction

10

Compaction is defined as?

The process by which the asphalt is compressed and reduced in volume.

11

What is the recommended percentage of air void?

4 1/2 % - 7%

12

If asphalt is compacted at lower temperatures, what can you expect?

More voids in the pavement

13

What is the minimum temperature for rolling asphalt?

175 degrees

14

What can occur if compaction is continued below 175 degrees?

You may fracture the aggregate

15

Can compaction vary due to layer thickness?

Yes

16

What is the ideal mix temperature of asphalt?

300 - 325 degrees

17

What is the recommended laydown temperature of asphalt?

between 225 and 280 degrees

18

What is the minimum air temperature you should pave to?

40 degrees

19

Should you consider heat loss from plant to laydown?

Yes.

20

Name three important causes of pavement failure?

Weak Subgrade, Design of Pavement and Improper Maintenance

21

Name four of the eight Pavement Treatments

Overlay, P.S.O. (pulverization stabilization overlay), Crack Sealing, Pot hole repair.
Also, Slurry Seal, Micro Seal, Reconstruction, Mill and Overlay

22

Crack Sealing and Pot Hole Repair are considered?

Maintenance

23

A proper pavement management system provides for?

Answer d) all of the above
a) proper maintenance procedures
b) prolongs life expectancy of the road
c) tool for prioritizing street repair

24

What is considered a structural maintenance technique?

b) overlay

25

Stabilization of the subgrade can be achieved through the use of?

Answer d) all of the above
a) Lime
b) Calcium Chloride
c) Sodium Chloride

26

The best ways to prevent alligator cracking is?

a) Crack Sealing
b) Slurry Sealing

27

The following condition can be corrected most effectively with the use of a Slurry Seal.

c) Polished Aggregate

28

Bleeding can best be described as free asphalt on the surface of the pavement caused by?

b) To much asphalt in one or more pavement courses

29

In winter cold asphalt is used because?

c) Stockpiling of material allows greater availabilty and move-ability of material since hot material is not produced