presented to: 2012 faa airport pavement working group meeting by: al larkin, faa airport technology...
TRANSCRIPT
Presented to: 2012 FAA Airport Pavement Working Group Meeting
By: Al Larkin, FAA Airport Technology R & D and Josh Davis, SRA
Date: April 25, 2012
Federal AviationAdministration
FAA Falling/Heavy Weight Deflectometer Roundup at
the National Airport Pavement Test Facility
2Federal AviationAdministration
FAA F/HWD ROUND-UP UPDATE
April 25, 2012
Objectives• Compare F/HWD with
single wheel module in both static and dynamic modes
3Federal AviationAdministration
FAA F/HWD ROUND-UP UPDATE
April 25, 2012
Roundup Objectives
• Compare backcalculated pavement material properties using available backcalculation programs,
• Evaluate specifications and methodologies for existing FWD-HWD equipment for use in pavement design and construction.
4Federal AviationAdministration
FAA F/HWD ROUND-UP UPDATE
April 25, 2012
• Evaluate deflection and time history data of different equipment.
Objectives
5Federal AviationAdministration
FAA F/HWD ROUND-UP UPDATE
April 25, 2012
Overview of F/HWD DeflectionsDrop 15 W to E Cycle 1
10
14.1
10
13.6112
39.1
18
34.47
21
29.27
35
48.55
0
10
20
30
40
50
60
Mea
sure
d D
efl
ecti
ons
(mils
)
ERI KUAB @ 16.5k lbs
Pave Test @ 21k lbs
FAA KUAB @ 36k lbs
JILS @ 36k lbs
Dynatest @ 36k lbs
Carl Bro @ 60k lbs
Respective Equipment MeasurementNAPTF MDD Deflection Measurement
6Federal AviationAdministration
FAA F/HWD ROUND-UP UPDATE
April 25, 2012
FAA KUAB HWD
7Federal AviationAdministration
FAA F/HWD ROUND-UP UPDATE
April 25, 2012
MDD Under Static Loading
05Oct2010 ,09 -36 -01,s6c1m4.bin -- MDD-2 – STATIC LOAD
8Federal AviationAdministration
FAA F/HWD ROUND-UP UPDATE
April 25, 2012
Pressure Cell Under Static Loading
05Oct2010 ,09 -10 -25,s6c1m2.bin – PC-1 -- STATIC LOAD
9Federal AviationAdministration
FAA F/HWD ROUND-UP UPDATE
April 25, 2012
Strain Gage Under Static Loading
05Oct2010 ,10 -25 -50,s6c1m3.bin SG-1 - STATIC LOAD
10Federal AviationAdministration
FAA F/HWD ROUND-UP UPDATE
April 25, 2012
Future Enhancements
• Provide F/HWD pavement response data; strain gages, MDD’s, and pressure cells,• Provide vehicle trafficking pavement response data,• In March 2012, F/HWD raw time history data was uploaded to the website.
11Federal AviationAdministration
FAA F/HWD ROUND-UP UPDATE
April 25, 2012
NAPTF Website
•www.airporttech.tc.faa.gov/naptf
Select News
Open 2010 HWD - FWD Round-up
12Federal AviationAdministration
FAA F/HWD ROUND-UP UPDATE
April 25, 2012
Contact Information
Al Larkin
Federal Aviation Administration
William J. Hughes Technical Center
National Airport Pavement Test Facility
Phone: (609) 485 – 5552
Email: [email protected]