Crack Sealing &All The Fun That Comes With It.

Presented by

Brett MeadorsHighway Improvement, Inc

Sioux Falls, S.D.South Dakota Asphalt Conference 2012

Rout, Blow & Seal Blow & Seal is a waste of

TIME & MONEY

What’s New??? ASTM 6690 Type II & IV ASTM 3405 & 3405 Low Modulous Name Change XLM

$$$ COST $$$ Typical $3,000 / Mile FHWA: For Every $1 Spent on

Maintenance $4 Savings in return

Do You Have a Program??? You should Pavement Maintenance – Is it really

that different than equipment/vehicle maintenance?

Causes Water Penetration Water penetrates through the cracks in the pavement

and into the sub base. The base is then softened which leads to cracks working their way up to the surface, then to "alligatored" areas and eventually potholes.

Sunlight The second cause of pavement cracking is due to

oxidation. Since asphalt pavement is approximately 94% aggregate and only 6% asphalt oil, it is very susceptible to the elements. Sun, rain, heat and cold trigger the asphalt to oxidize, causing it to harden and shrink.

Causes Continued Lack of Control Joints / Freeze-Thaw

Cycles Most asphalt surfaces, unlike concrete, do not

have control joints and thus cracks appear where the most stress is placed.

Subbase

Why Crack Seal ???

• Prevent water penetration.• Prevent incompressibles.• Protects subbase.• Adds life to pavement.

How to Crack Seal ??? Correctly – Sealant / Router / Cutters Do your homework Call me

SD DOT Specified Method of Crack Sealing

1. Routing joint to ¾” x ¾” reservoir. 2. Blow joint clean with 125 cfm

compressed air.3. Install hot pour sealant meeting

ASTM D 6690 Type IV Modified specification.

4. 6” overband of crack with squeegee.

5. Install blotter material (If required).

Routing vs. Blow & Seal

FHWA/SHRP Report

6.5 year federal study. 61 different crack

treatments tested. 32 treatments failed. 4 crack repair sites. Conclusion: ¾” x ¾” rout

and seal best method.

How Long Does It Last???

A typical Rout, Blow, And Seal should last between 5 to 7 Years.

Traffic Control

Routing

Clean Joint with Compressed Air

Install Sealant & Overband

Install Blotter Material

Goals of crack sealing program

1. Long term cost effective pavement maintenance.

2. Improves performance of other maintenance measures.

3. Takes money to save money

QUESTIONS???

Thank YouFor further information or comments please contact:

Brett MeadorsHighway Improvement, Inc.

P.O. Box 1803 Sioux Falls, SD 57101

(605)310-7725