texture, surface characteristics, and functional...
TRANSCRIPT
Robert Otto Rasmussen, PhD, INCE, PE
Texture, Surface Characteristics, and
Functional Performance
29 August 2012
Smoothness
Friction
Noise
Rolling Resistance
Splash & Spray
Vehicle Wear
Tire Wear
Functional Pavement Performance
Design
Materials
Construction Climate
Traffic
Maintenance
Texture
Porosity Stiffness
Users & Society
Noise
Friction
Splash & Spray Albedo
Smoothness
Human Experience &
Societal Demands
Pavement Surface
Characteristics
(Functional
Performance)
Pavement
Properties
Factors
Foundation
Functional Pavement
Performance
Texture
Roughness Megatexture
Macrotexture Microtexture
Texture
Texture
Texture: “Sand” Patch
Texture: RoboTex
LMI RoLine
Line Laser
Texture: RoboTex
Longitudinal
Tining
Diamond
Grinding
Texture: RoboTex
Surface
Characteristics
Noise: On-Board Sound Intensity (OBSI)
AASHTO TP 76
Noise: On-Board Sound Intensity (OBSI)
Friction ASTM E 274
Photo: Ministry of Transportation Ontario
Friction vs. Noise Do Friction and Noise Relate?
100
102
104
106
108
110
112
10 20 30 40 50 60 70 80
Average DFT/CTM-Estimated SN40S (ASTM E 274 Skid Trailer, Bald Tire)
Avera
ge O
BS
I Level (d
BA
)
Rolling Resistance
COOEE / MnROAD / MIRIAM
Variability
In 8 years, 2000 unique textures have been tested Concrete
Tined, Diamond Ground and Grooved, Drag
Exposed Aggregate
Pervious
Asphalt
Dense-Graded
SMA
Porous
Surface Treatments
Bonded Wearing Courses
Slurry Seals
Chip Seals
Shot Peened
Milled
Hundreds of miles in 20 States and 7 Countries
Variability
There is a lot of:
VARIABILITY
Variability from project to project, and
variability within a given project.
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
98 100 102 104 106 108 110
A-weighted Overall OBSI Level, 60 mph, SRTT (dB ref 1 pW/m²)
Pro
ba
bil
ity
De
ns
ity
Diamond Grinding
Drag
Longitudinal Tining
Transverse Tining
Variability: OBSI Noise Catalog
98 dBA 98 dBA Colorado Kansas
104 dBA 101 dBA New York Minnesota
Diamond Grinding
Grooves
Lands
Fins
Variability: Diamond Grinding
101
102
103
104
105
106
107
0 100 200 300 400 500 600 700
On
-Bo
ard
So
un
d I
nte
nsit
y L
evel
(dB
A)
44
-ft.
Mo
vin
g A
vera
ge
Variability within a Job
102 dBA
98 dBA
106 dBA
100 dBA
100 dBA
97 dBA
Laydown
Compaction
Variability: Asphalt Pavement
Photo: Lafarge
Better Practices
and
Quality Control
Design, Construction, Preservation Guidelines
www.CPTechCenter.org www.TRB.org
www.PavementPreservation.org
SHRP 2 R06(E)
Real-Time
Smoothness for
Concrete Paving
Real-Time Monitoring
Real-Time Monitoring
www.IntelligentCompaction.com
MP
D
L6
3
L4
Texture Machine,
Grinder, or
Roller
Texture and Vibration
Feedback
LMI RoLine
Line Laser
Monitor Texturing Operations
Visualization and
Network Evaluation
Visualization
Visualization
Visualization
Visualization
Visualization
Visualization
Visualization
Visualization
Visualization
Visualization
Visualization
Robert Otto Rasmussen, PhD, INCE, PE (TX,FL,NC,KY)
Vice President & Chief Engineer
The Transtec Group, Inc.
6111 Balcones Drive, Austin, Texas 78731 USA
+1 (512) 451 6233 [email protected]