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Flashcards in Pavement Management Deck (29)
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1
Q

What is the design purpose of asphalt pavement?

A

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

2
Q

What are the three components of asphalt?

A

Aggregate, Cement (AC20), Air Voids

3
Q

Mix I-5 is?

A

FABC = Fine Aggregate Bituminous Concrete

4
Q

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

A

answer d) all of the above

Performance, Fatigue and Rutting

5
Q

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

A

175 degrees

6
Q

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

A

Answer d) all of the above

Surface Water, Moisture held or drawn through the soil, High water Table

7
Q

Potholes can most effectively be repaired by?

A

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

8
Q

Recommended procedure for cutout deeper than 6” is

A

a) Placing at fault and more than one lift

9
Q

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

A

Compaction

10
Q

Compaction is defined as?

A

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

11
Q

What is the recommended percentage of air void?

A

4 1/2 % - 7%

12
Q

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

A

More voids in the pavement

13
Q

What is the minimum temperature for rolling asphalt?

A

175 degrees

14
Q

What can occur if compaction is continued below 175 degrees?

A

You may fracture the aggregate

15
Q

Can compaction vary due to layer thickness?

A

Yes

16
Q

What is the ideal mix temperature of asphalt?

A

300 - 325 degrees

17
Q

What is the recommended laydown temperature of asphalt?

A

between 225 and 280 degrees

18
Q

What is the minimum air temperature you should pave to?

A

40 degrees

19
Q

Should you consider heat loss from plant to laydown?

A

Yes.

20
Q

Name three important causes of pavement failure?

A

Weak Subgrade, Design of Pavement and Improper Maintenance

21
Q

Name four of the eight Pavement Treatments

A

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

22
Q

Crack Sealing and Pot Hole Repair are considered?

A

Maintenance

23
Q

A proper pavement management system provides for?

A

Answer d) all of the above

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

24
Q

What is considered a structural maintenance technique?

A

b) overlay

25
Q

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

A

Answer d) all of the above

a) Lime
b) Calcium Chloride
c) Sodium Chloride

26
Q

The best ways to prevent alligator cracking is?

A

a) Crack Sealing

b) Slurry Sealing

27
Q

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

A

c) Polished Aggregate

28
Q

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

A

b) To much asphalt in one or more pavement courses

29
Q

In winter cold asphalt is used because?

A

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