Virginia Quiet Pavement Implementation Program

Kevin K. McGhee, PE Assoc. Principal Scientist

2012 Virginia Concrete Conference Richmond, Virginia

3/30/2012 2 2

Quiet Pavement Task Force

Co-Chairs: Andy Babish, PE, State Materials Engineer Richard Schreck, Executive Vice President, VAA

Members: Emmett Heltzel, PE, VDOT Maintenance Division Administrator Trenton Clark, PE, VAA Director of Engineering David Lee, PE, VDOT Salem District Materials Engineer and

Chairman VTRC Asphalt Research Advisory Committee Paul Kohler, VDOT Noise Abatement Section Manager Michael Sprinkel, PE, VTRC Associate Director of Research Kevin McGhee, PE, VTRC Associate Principal Scientist Ed Dalrymple, Vice President, Chemung Contracting David Helmick, Vice President, Superior Paving Corp. Bob Long, American Concrete Pavement Association Del. Jim Lemunyon, JCTA Subcommittee on Quiet Pavements

3/30/2012 3

2011 Virginia General Assembly - HB 2001

“expedite the development of quiet pavement technology such that applicable contract solicitations for paving shall include specifications for quiet pavement in any case in which sound mitigation is a consideration. To that end, the Department shall construct demonstration projects sufficient in number and scope to assess applicable technologies.”

“Quiet” Pavement

What it is: • In General – a wearing surface that minimizes

tire-pavement noise production and propagation • Asphalt – “small-textured” porous mix (e.g.,

open-graded asphalt concrete) • Concrete – negative-textured longitudinal grind

and groove (e.g., “Next Generation Concrete Surface”)

What it isn’t: • A universal substitute for noise barriers

“Quiet” Pavement

• Asphalt:

• Concrete:

Noise Measurement

Tire-Pavement (i.e.,OBSI) Wayside

94.0

96.0

98.0

100.0

102.0

104.0

106.0

108.0PF

C

PFC

SM-9

.5D

SM-9

.5D

LMEC

THM

ACO

THM

ACO

THM

ACO

OG

FC -

12.5

THM

ACO

SMA

9.5

Gro

und

PCC

SMA

- 12.

5

SMA

9.5

LMEC

THM

ACO

THM

ACO

SM-9

.5D

LMEC

Gro

und

PCC

LMEC

PCC

Gro

ove-

1/2"

PC

C

Tran

sv. T

ine

PCC

Gro

ove-

3/4"

PC

C

Trnv

. Grv

e D

eck

Gro

und

PCC

Surf.

Tre

at.

Surf.

Tre

at.

OBS

I (dB

A)

Baseline Noise – VA 2010/11

3/30/2012 8

Demonstration Projects (2011)

1. SR 7 By-Pass in Leesburg (A) 2. SR 199 west of Williamsburg (A) 3. SR 288 near Chester (A) 4. I-64 Virginia Beach (C) 5. SR 76 Richmond (C)

1

2 3

4

5

3/30/2012 9

Demonstration Projects (Conc)

Exist. Finish

Conv. Grind

NGCS Exist. Finish

Plan View

State Route 76 (Richmond)

Section 1: NGCS Section 2:

Conv. Ground

Section 3: Control

E

W

I-64 (near VA

Beach) Section 1:

NGCS

Section 2: Conv. Ground

Section 3: Control

E W

Next Generation Concrete Surface

• First Step – “pre-grind” with conventional diamond grinding process (1/8-inch blades and .110-inch spacers)

• Second Step – the “flush grind” process (4-ft head, 1/8-inch blades and .035-inch spaces) smoothness requirements

• Final Step – longitudinal grooves (1/8-in wide x 1/8 or 3/16-in deep on ½ to 5/8-in centers)

Pass 1

Pass 2

NGCS Process

Friction and Ride Quality

• SN40S greater than 25 (ASTM E274 with E524/bald tire) – waived for demos

• Ride Quality: 1. VDOT’s “Special Provision for Rideability”

• .01-mile paylot • IRI of 55 – 70 Interstate/65 to 80 non-Interstate)

2. NGCS Smoothness • Lightweight profiler with RoLine™ ht. sensor • Mean Roughness Index (MRI) of 50 or less

3/30/2012 15

Evaluation Plan

• Performance – Tire-pavement & wayside noise – Skid resistance, ride quality, and splash-spray – Material and structural stability

• Also Relevant – Constructability & cost – Winter function and maint. requirements – Federal Policy!!

Functional Evaluation

Tire-Pavement Noise

Texture

Ride Quality

Skid Resistance

Wayside Noise

Surface Drain-ability

NGCS site “pre-grind”- Richmond

Control site - Richmond

NGCS finished

Conventional Grind

Tire-Pavement Noise (initial)

Control (A)

Conctrol (C)

90.0

92.0

94.0

96.0

98.0

100.0

102.0

104.0

106.0

PFC 12.5 AR-PFC 9.5 NGCS PFC 9.5 SMA 9.5 CDG Trans. Tined PCCP

OB

SI (d

BA)

3/30/2012 23

Overall Program Costs (so far)

• Demonstration Projects (2011): $20 to $24 million

• Research - Approximately $1.2 to $1.5 million: – NCAT Trials - $720,000 to $1 million – VTTI Contract - $250,000 – VCTIR/VDOT In-house -$210,000

3/30/2012 24

Remaining Activities

• Interim report - June 2012 • Additional demonstration projects –

summer/fall 2012 (likely asphalt only) • Quarterly/biannual monitoring • Final Report - June 2013 - will include

“…a plan for routine implementation of quiet pavement…”

Program Website: http://www.vtti.vt.edu/CSTI-research/va-quiet-pavement-implementation-program.php