texture, surface characteristics, and functional...

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 Robotto@TheTranstecGroup.com