This document discusses quality control for various pavement maintenance and reconstruction projects. It emphasizes that quality control starts with proper project selection and requires experienced contractors, accurate specifications, thorough inspection, and monitoring of materials and processes. For microsurfacing, key quality control includes ensuring the proper mix design, machine calibration, application rates, and return to traffic time. For chip sealing, important factors are emulsion and aggregate spread rates and monitoring distributor-spreader distance. Quality control for cold in-place recycling and full depth reclamation requires subsurface investigation, verifying design and materials, checking yields during stabilization, and ensuring proper compaction, moisture, and rebuild grades.

1. Pavement Maintenance & Reconstruction:
“Critical Quality Control”
Kevin McGlumphy, P.E. – Road Science Div of AMCC
Bob Siffert – Asphalt Paving Systems (APS)

2. Quality Control Starts with
GOOD Project Selection…
“Right Road, Right Treatment, Right Time”

3. Quality Control for Dummies
(and/or Engineers)…
1. Make sure your specifications are FAIR and
PERFORMANCE DRIVEN.
2. Plan on ENFORCING the specifications.
3. Verify design values and emulsion properties.
4. A properly trained inspection team is critical.
5. 80% of QC happens when inspector SHOWS UP!
6. Other 20% happens if inspector Stays All Day.

4. Quality Control for Engineers
(and/or Dummies)…
7. Require an EXPERIENCED contractor.
8. Calculate yields road-by-road.
9. Make sure proper surface prep is done.
10. Monitor the quality and the quantity of all
materials that come to the job.
~Don’t count a process out just because you
“heard it failed” for someone else.

5. Micro-Surfacing

6. Critical QC for Micro-Surfacing
1. Mix Design
a. Right Aggregate?
b. Right Emulsion?
c. Right Additives?
2. Machine Calibration
a. “Counting Clicks”

7. Critical QC for Micro Surfacing
4. Residual AC Content
5. Return to Traffic:
a. 30-60 min
3. Application Rates
a. Singles: 18-22 lbs/SY
b. Doubles: 28-32 lbs/SY

8. Critical QC for Micro Surfacing

9. Micro Surfacing Discussion…

10. Chip Seal / Surface
Treatment

11. Chip Seal Types
 Single Chip Seal
 Double Chip Seal
 Cape Seal

12. Critical QC for Chip Seal
1.Emulsion Shot Rate
2. Aggregate Spread Rate

13. Critical QC for Chip Seal
4. Ambient Temp?
5. Clean Stone?
6. Emulsion
Properties?
3. Distance between
Distributer & Spreader?

14. Chip Seal Discussion…

15. Cold In-Place Recycling & Full Depth
Reclamation

16. Critical QC for CIR & FDR
1. Subsurface investigation & mix design
2. Verify design and materials.
3. Project Selection – FDR or CIR?
4. Monitor additives during stabilization – CHECK YIELDS

17. Critical QC for FDR & CIR
5. Compaction effort & moisture content.
6. Rebuild to proper grades & elevations.
7. Check the cutting depth often.

18. FDR & CIR Discussion…

19. Question & Answer Session