ncat pavement test track
DESCRIPTION
NCAT PAVEMENT TEST TRACK. www.pavetrack.com. 2006 TRACK OBJECTIVES. Continuation/Expansion of Structural Experiment Top-Down Cracking Perpetual Pavement Designs Weak Subgrades Flat and Elongated Coarse Aggregate Effects in OGFC Twin Layer Placement of Dual Drainage Layers - PowerPoint PPT PresentationTRANSCRIPT
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NCAT PAVEMENT TEST TRACKNCAT PAVEMENT TEST TRACK
www.pavetrack.com
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• Continuation/Expansion of Structural Experiment– Top-Down Cracking– Perpetual Pavement Designs– Weak Subgrades
• Flat and Elongated Coarse Aggregate Effects in OGFC• Twin Layer Placement of Dual Drainage Layers• RAP Percentage (0, 20 & 45%) and Binder Grade• Gravel Open Graded Friction Coarse• Lower Gyration Level Dense Mixes• Effect of Varying Air Voids on Performance• Pavement Preservation Techniques
2006 TRACK OBJECTIVES
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2006 RESEARCH CYCLE
4
TRAFFIC APPLICATION
0
1,000,000
2,000,000
3,000,000
4,000,000
5,000,000
6,000,000
7,000,000
8,000,000
9,000,000
10,000,000
11/9/2006 2/7/2007 5/8/2007 8/6/2007 11/5/2007 2/3/2008 5/3/2008 8/1/2008 10/31/2008
Date of Operation
Eq
uiv
ale
nt
Sin
gle
Ax
le L
oa
din
gs
Actual Ideal Week Difference Month Difference
5
AVERAGE RUT DEPTHSRutting Performance
Cycle of Construction Shown by Color (Black=2000, Blue=2003, Red=2006), N1-N10 & S11 Structural (M-E)
7.5
4.8
2.91.31.10.9
4.2
1.61.62.52.0
3.73.6
1.0
5.75.15.7
2.9
6.9
0.3
-0.1
0.3
3.95.5
2.7
5.3
1.7
6.8
2.2
4.5
8.1
2.5
4.8
-0.2
0.82.22.6
0.7
36.6
20.2
23.324.6
0.5
2.8
6.3
12.7
0.4
4.3
8/20/07
0
5
10
15
20
25
30
35
40
45
50
E2
E3
E4
E5
E6
E7
E8
E9
E1
0
N1
N2
N3
N4
N5
N6
N7
N8
N9
N1
0
N11
N1
2
N1
3
W1
W2
W3
W4
W5
W6
W7
W8
W9
W1
0
S1
S2
S3
S4
S5
S6
S7
A
S7
B
S8
A
S8
B S9
S1
0
S11
S1
2
S1
3
E1
Pavement Test Section
Av
era
ge
Ru
t D
ep
th (
mm
) E
sti
ma
ted
via
AR
AN
Sc
an
nin
g L
as
ers
6
AVERAGE RUT DEPTHS
1.3 1.1 0.91.6 1.6
2.5 2.01.0
5.7
2.9
6.9
0.3
-0.1
0.3
2.7
5.3
1.7
-0.2
0.8 0.7
36.6
20.2
23.324.6
6.3
12.7
0
5
10
15
20
25
30
35
40
E5 E6 E7 E9 E10 N1 N2 N5 N8 N9 N10 N11 N12 N13 W3 W4 W5 S2 S3 S6 S7A S7B S8A S8B S11 S12
Pavement Test Section
Avg
Ru
t D
epth
(m
m)
Est
imat
ed v
ia A
RA
N S
can
nin
g L
aser
s
7
RAP STUDY SECTIONS
8
PLANT RAP FRACTIONATION
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RAP STUDY MATSN5-0%RAP-PG67
W3-20%RAP-PG76 W4-20%RAP-PG67 W5-45%RAP-RA500
E5-45%RAP-PG67 E6-45%RAP-PG76 E7-45%RAP-PG76s
10
WEEKLY RUTTING MEASUREMENTS
0
1
2
3
4
5
6
7
8
9
10
11
12
0 1,000,000 2,000,000 3,000,000 4,000,000 5,000,000 6,000,000 7,000,000 8,000,000 9,000,000 10,000,000
ESALs
Av
era
ge
Ru
t D
ep
th (
mm
)
N5-0%RAP-PG67
W3-20%RAP-PG76
W4-20%RAP-PG67
W5-45%RAP-RA500
E5-45%RAP-PG67
E6-45%RAP-PG76
E7-45%RAP-PG76S
11
8/27/07 AVERAGE RUT DEPTHS
0
1
2
3
4
5
6
7
8
9
10
11
12
N5-0%RAP-PG67 W3-20%RAP-PG76 W4-20%RAP-PG67 W5-45%RAP-RA500 E5-45%RAP-PG67 E6-45%RAP-PG76 E7-45%RAP-PG76s
Ave
rage
Rut
Dep
th (m
m)