SEAUPG 2004 Conference - Baton Rouge Presented By Dale A ...seaupg.org/PDF/2004/Wed DRand.pdf ·...
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1 Permeable Friction Courses TxDOT Experiences Dale A. Rand, P.E. TxDOT Construction Division Flexible Pavements Branch SEAUPG Baton Rouge, La. Nov. 17, 2004 Background TxDOT used OGFC (plant mix seal) up until the early 1990s TxDOT ceased using OGFC in the early 90s due to durability issues TxDOT started using PFC in 2000 The use of PFC is growing at a steady rate There are approximately 50 PFC projects completed or currently under construction in Texas Comparison of Plant Mix Seal and Permeable Friction Course < 20% N/A, > 30 % Cantabro Loss 1.25 to 1.5 inches 1.0 inch or less Typical thickness High Moderate Permeability 0.0 Typical 0.3% Maximum 0.5 – 1.5% Drain down 10 – 14 years 5 – 8 years Typical life 300F – 350F Removes all moisture 212F – 220F Not all moisture removed Production Temperature 18% - 22% 12% – 15% Air Voids 0.3 % Cellulose or Mineral N/A Fiber 6 – 7 % (PG 76) 8 – 10% (A-R) 5 – 7% Binder % PG 76-22 Asphalt Rubber (A-R) AC-10 AC-10 (+ 3% latex) Binder Grade Permeable Friction Course Plant Mix Seal Characteristic 0-5 0-10 N/A 25-40 90-100 100 ODOT OGFC 1-4 N/A 5-10 10-25 35-60 90-100 Georgia 1/2 inch PEM 1-4 2-4 N/A N/A #200 N/A N/A 5-15 0-4 #10 1-10 5-10 N/A N/A #8 1-20 15-25 5-20 0-8 #4 35-60 55-75 50-80 50-80 3/8 inch 80-100 85-100 95-100 95-100 1/2 inch Texas 1/2 inch PFC PG76 Georgia 1/2 inch Modified OGFC Texas Grade 2 Plant Mix Seal Texas Grade 1 Plant Mix Seal Sieve Size OGFC – Gradation Comparison (% Passing) National Asphalt Pavement Association Sheldon G. Hays Award Wichita Falls District US 287 – Wilbarger County Vernon Area Office Contractor – Duininck Bros. Surface Mix – 1.5 inches of PFC placed on Superpave level up mix Average IRI = 43 inches per mile Award is given to 1 hot mix project per year US 287 - Wilbarger Co. Comparison of Vehicle Spray/Ride Quality CRCP SFHMACP (Superpave) PFC SEAUPG 2004 Conference - Baton Rouge Presented By Dale A. Rand, P.E. - Texas DOT
Transcript of SEAUPG 2004 Conference - Baton Rouge Presented By Dale A ...seaupg.org/PDF/2004/Wed DRand.pdf ·...
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Permeable Friction Courses
TxDOT Experiences
Dale A. Rand, P.E.
TxDOT Construction Division
Flexible Pavements Branch
SEAUPG
Baton Rouge, La.
Nov. 17, 2004
Background
TxDOT used OGFC (plant mix seal) up until the early 1990sTxDOT ceased using OGFC in the early 90s due to durability issuesTxDOT started using PFC in 2000The use of PFC is growing at a steady rateThere are approximately 50 PFC projects completed or currently under construction in Texas
Comparison of Plant Mix Seal and Permeable Friction Course
< 20%N/A, > 30 % Cantabro Loss
1.25 to 1.5 inches1.0 inch or lessTypical thickness
HighModeratePermeability
0.0 Typical0.3% Maximum
0.5 – 1.5%Drain down
10 – 14 years5 – 8 yearsTypical life
300F – 350FRemoves all moisture
212F – 220FNot all moisture removed
Production Temperature
18% - 22%12% – 15%Air Voids
0.3 %Cellulose or Mineral
N/AFiber
6 – 7 % (PG 76)8 – 10% (A-R)
5 – 7%Binder %
PG 76-22Asphalt Rubber (A-R)
AC-10 AC-10 (+ 3% latex)
Binder Grade
Permeable Friction CoursePlant Mix SealCharacteristic
0-5
0-10
N/A
25-40
90-100
100
ODOTOGFC
1-4
N/A
5-10
10-25
35-60
90-100
Georgia1/2 inch
PEM
1-42-4N/AN/A#200
N/A N/A5-150-4#10
1-105-10N/AN/A#8
1-2015-255-200-8#4
35-6055-7550-8050-803/8 inch
80-10085-10095-10095-1001/2 inch
Texas1/2 inch
PFC PG76
Georgia1/2 inchModified
OGFC
TexasGrade 2
Plant Mix Seal
TexasGrade 1
Plant Mix Seal
SieveSize
OGFC – Gradation Comparison (% Passing)
National Asphalt Pavement AssociationSheldon G. Hays Award
Wichita Falls DistrictUS 287 – Wilbarger CountyVernon Area OfficeContractor – Duininck Bros.Surface Mix – 1.5 inches of PFC placed on Superpave level up mixAverage IRI = 43 inches per mileAward is given to 1 hot mix project per year
US 287 - Wilbarger Co.
Comparison of Vehicle Spray/Ride QualityCRCP
SFHMACP (Superpave)PFC
SEAUPG 2004 Conference - Baton RougePresented By Dale A. Rand, P.E. - Texas DOT
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Concrete PavementUS 287 Wilbarger County
Concrete PavementUS 287 Wilbarger County
Stone Filled (Superpave) HMACUS 287 Wilbarger County
Permeable Friction Course (PFC)US 287 Wilbarger County
Winner of NAPA’s Sheldon G. Hays Award (2004)
US 287 (Wichita Falls District) International Roughness Index (IRI)
Comparison of 2 Projects Completed in the Fall of 2001
0
20
40
60
80
100
120
140
Reference Markers
IRI (
In./m
i.)
Flexible (PFC + Superpave) Rigid (11" CRCP)
0300 +00.5 to 0312 +00.0
0472 +01.2 to 0478 +00.2
US 287
US 70/ US 287
Rubber Pavements AssociationOutstanding Project Award
San Antonio DistrictIH 35 – Bexar CountyNew Braunfels Area OfficeContractor – Dean Word CompanySurface Mix – 1.5 inches of A-R PFC
SEAUPG 2004 Conference - Baton RougePresented By Dale A. Rand, P.E. - Texas DOT
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IH 35 – San AntonioPFC Overlay on Existing CRCP
Existing concrete pavement– Relatively sound structurally (Durable)– Approximately 20 years old (Durable)– History of numerous wet weather accidents (Safety?)– Ride Quality was poor (IRI = 200) (Comfort?)– Considered to be one of the loudest pavement
surfaces around (Comfort?)
A-R PFC Overlay on CRCPIH 35 San Antonio
1.5 inches of A-R PFC– Improved the ride quality of the existing CRCP by
approximately 61%– Improved the skid resistance by over 200%– Reduced the noise level by an average of 8 to 14
decibels (measured by 3 different individuals)– Significant reduction in major accidents after the PFC
overlay
Accident, Climatic DataI-35 San Antonio
Before/After Resurfacing CRCP with PFC
Accident Data, I-35
• Before placing PFC– July 1, 2001 - June 30, 2002
• After placing PFC– November 1, 2002 - October 31, 2003
• Accident categories– Major = injury accident– Minor = non-injury accident
• Information provided by the San Antonio Police Department (SAPD)
Climatic & Accident DataIH 35 San Antonio: Before and After PFC Overlay
July 2001-June 2002• Total Precipitation:
– 31.78 inches
• Total Days with…– Measurable precipitation: 69
• Major Accidents: 85• Major Accidents on Days
with Precipitation: 39
Nov 2003-Oct 2003• Total Precipitation:
– 32.63 inches
• Total Days with…– Measurable precipitation: 99
• Major Accidents: 48• Major Accidents on Days
with Precipitation: 19
Climate data obtained from National Oceanographic and Atmospheric Administration
A-R PFC on CRCP
IH 35 San Antonio, Fall 2002
SEAUPG 2004 Conference - Baton RougePresented By Dale A. Rand, P.E. - Texas DOT
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9 year old Asphalt Rubber - PFC
Lufkin District
Click on image below to show video
US 183 – Williamson Co.
South Bound near San Gabriel River
PFC Mix
Dense Grade (Type C)
FM 1431 – Feb 14, 2004
Travis County
47 Accidents in 2003
5 Fatalities in 2003
Click on image below to show video
FM 1431 – Travis County
WBL – Between Cedar Park and Jonestown
PFC Mix
Dense Grade
PFC Mix
Dense Mix FM 1431 – Travis Co.
East Bound near Cedar Park ~ 7AM
Click on image below to show video
SEAUPG 2004 Conference - Baton RougePresented By Dale A. Rand, P.E. - Texas DOT
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FM 1431 – Travis Co.
East Bound near Cedar Park ~ 9AM
Dense Mix
PFC Mix
Click on image below to show video
PFC may not be the best choice if you get too much of the white stuff.
ConclusionsPFC may be the most effective tool for improving the performance of existing (and new) pavements (including concrete)PFC is an excellent “Public Relations” toolPFC and SMA help meet TxDOT’s vision of having comfortable, safe, and durable pavements
Opinion – In warm climate regions, PFC is unmatched in terms of safety and comfort
Questions?
SEAUPG 2004 Conference - Baton RougePresented By Dale A. Rand, P.E. - Texas DOT
