optimizing the durability and functionality of pfc surfaces don watson test track sponsor meeting
DESCRIPTION
Optimizing the Durability and Functionality of PFC Surfaces Don Watson Test Track Sponsor Meeting May 11, 2011. Objective. Durability Issues Raveling Crack Resistance Functionality Issues Permeability Smoothness Structural Value. Raveling Crack Resistance. Durability Issues. - PowerPoint PPT PresentationTRANSCRIPT
Optimizing the Durability and Functionality of PFC Surfaces
Don WatsonTest Track Sponsor MeetingMay 11, 2011
1
Objective• Durability Issues–Raveling–Crack Resistance
• Functionality Issues–Permeability– Smoothness– Structural Value
2
–Raveling–Crack Resistance
Durability Issues
3
4
Raveling
Change in Texture with Traffic
5
1.00
1.10
1.20
1.30
1.40
1.50
1.60
1.70
0.00 2.00 4.00 6.00 8.00 10.00
Text
ure
Dept
h (m
m)
ESALs (Million)
N1
N2
N13
S3
S4
S8
Crack Resistance
6
PFC Surface Cracks (Tack Method)
• 2006 crack susceptible dense Superpave mix– Surface cracks after 1.9M ESALs (Rehab at 5.6M)
• 2009 PFC surface placed with conventional tack– Surface cracks after 2.2M (cracking/pumping at 8.2M)
• 2009 bonded PFC surface placed with spray paver– Surface cracks after 4.1M (looks good at 8.2M)
7
OGFC Surface Cracks (Tack Method)
Conventional Tack
Bonded
8
5/2/2011 Crack Maps (N2 / N1)
9
–Permeability– Smoothness– Structural Value
Functionality Issues
10
Permeability
11
Same Mix Drains Better at 1¼”
N1 - ¾”Bonded
N2 - ¾”Tacked
S8 - 1¼”Tacked
12
Smoothness
13
Change in Smoothness with Traffic
14
50.0
60.0
70.0
80.0
90.0
100.0
110.0
120.0
130.0
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00
IRI (
in/m
i)
ESALs (Millions)
N1
N2
N13
S3
S4
S8
Structural Value
15
Structural Contribution of OGFC
16
Similar Rutting Performance
17
Similar Strain Response
50% RAP
Virgin Mixes
18
Questions??
19