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PAVEMENT PRESERVATION TREATMENT CONSTRUCTION GUIDE
CHAPTER 3: CRACK SEALING, CRACK FILLING & JOINT SEALING OF FLEXIBLE & RIGID PAVEMENTS
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Chapter 3: Crack Sealing, Crack Filling & Joint Sealing of Flexible & Rigid Pavements: Media

Unit 1:

Fatigue cracking appears like a web of cracks.

Figure 1: Fatigue Cracking

Longitudinal cracking follows the direction of traffic.

Figure 2: Longitudinal Cracking

Transverse cracking is perpendicular to the direction of traffic.

Figure 3: Transverse Cracking

Block cracking is interconnected cracks extending in many directions.

Figure 4: Block Cracking

Reflection cracking extends through an overlay.

Figure 5: Reflection Cracking

Edge cracking is a series of rippled cracks in parallel rows.

Figure 6: Edge Cracking

Slippage cracking resembles a sliding boot print in the snow.

Figure 7: Slippage Cracking

Illustration of thermal effects on the growth of cracks. Shows how temperature fluctuations create cracks in both the old surface course and the overlay.

Figure 8: Thermal Effects on Crack Growth

Illustration of the effect of traffic load on the growth of a crack. Shows how traffic can stress both the overlay and the old surface course, creating a subcourse void that further enlarges the crack.

Figure 9: Traffic Load Effects on Crack Growth

Chart showing projected life of a preservation treatment.

Figure 10: Treatment Effectiveness

 

Unit 2:

Flush Fill Method showing Material and Crack

Figure 11: Flush Fill Method

Illustrates simple Band-Aid overband method

Figure 12a: Overband Method

Illustrates capped overband method

Figure 12b: Overband Method

Reservoir Fill Method with Flush Finish

Figure 13: Reservoir Fill Method with
Flush Finish

Combination Fill Method

Figure 14: Combination Fill Method

Combination: Sand Fill with Recessed Finish

Figure 15: Combination: Sand Fill with Recessed Finish

Recessed Finish

Figure 16a: Three Common Backer Rod Configurations

Flushed Finish

Figure 16b: Three Common Backer Rod Configurations

Capped Finish

Figure 16c: Three Common Backer Rod Configurations

 

Unit 3:

A worker routs pavement cracks.

Figure 17: Crack Routing Operation

Two men clean pavement cracks manually.

Figure 18: Manual Crack Cleaning

Backer rod in a crack channel.

Figure 19: Backer Rod Installed Into Crack Channel

A road worker uses hot pressure to apply crack sealer.    

Figure 20a: Application Techniques and Equipment

Pour Pot

Figure 20b: Application Techniques and Equipment

An illustration of the squeegee flat finishing technique.    

Figure 21a: Typical Flat Finishing Techniques

Illustration of the flat plate finishing technique.

Figure 21b: Typical Flat Finishing Techniques

Illustration of the over banding finishing technique.

Figure 21c: Typical Flat Finishing Techniques

A worker brooms the blotter coat.

Figure 22: Brooming Blotter Coat Over a Treated Crack

A road displays the telltale ribbons of excessive sealant.

Figure 23: Excessive Sealant

Pavement shows its multiple treatments.

Figure 24: Multiple Treatments

Poor Workmanship - Raised, Bumpy Sealing

Figure 25: Poor Workmanship - Raised, Bumpy Sealing