Upload
chibale
View
41
Download
1
Tags:
Embed Size (px)
DESCRIPTION
SHRP2 R06(E) Real-Time Smoothness Measurements on Portland Cement Concrete Pavements During Construction. AASHTO Subcommittee on Construction 2010 Summer Meeting Burlington, Vermont, 18 August 2010. Project Principals: Robert Otto Rasmussen, PhD, INCE, PE (TX) Steven M. Karamihas, MSME - PowerPoint PPT Presentation
Citation preview
SHRP2 R06(E)
Real-TimeSmoothness Measurements on
Portland Cement Concrete PavementsDuring Construction
AASHTO Subcommittee on Construction2010 Summer Meeting
Burlington, Vermont, 18 August 2010
Project Principals: Robert Otto Rasmussen, PhD, INCE, PE (TX) Steven M. Karamihas, MSME Helga N. Torres, MSE, PE (GA)
Senior Program Officer: James W. Bryant, Jr., PhD, PE
What not to expect from this project?A replacement for conventional profiling for Quality Assurance.
Technology that replaces better practices for constructing smoother pavements.
What can you expect from this project?Validation of innovative tools for evaluating concrete pavement smoothness in real time.
Tools that can be used for Quality Control.
Tools that can reduce must-grinds, and thus reduce project delays and claims.
Improved understanding about what construction artifacts can affect smoothness.
Immediately implementable results.
Project ObjectivesDemonstrate and evaluate real-time smoothness measuring technologies for concrete paving.
Develop draft specifications and construction guidance for use with these technologies.
Research Team
Construction Expertise
National CP Tech Center(Paul Wiegand)
Gary FickSabrina Garber
Smoothness Expertise
George ChangDave Merritt
Principal Investigators
Robert RasmussenSteven Karamihas
Project Coordinator
Helga Torres
State DOTAnd
Paving ContractorsTechnology
Vendors
Instrumentation, Measurements
Expertise
Rich SohaneyRobert Watson
Feedback“On the Fly Changes”
Real-Time Pavement Profile
Profile Characteristics
ŒŽ
Construction
Design
Materials Environment
Factors
Smoothness Statistics
IRI PIcalpro
Real-Time Profiler
Technology
ModelSpecifications
and Guidelines
Process
Profile CharacteristicsObjectionable Profile Characteristics
Localized Roughness
Repetitive Features
Curled and Warped Slabs
Joint effects
Texture effectsSome of these don’t happen “behind the
paver”!
Profile Characteristics
Œ Dowel Basket Rebound
Concrete Loading
Ž Stringline Sag
Localized Roughness
Profile Characteristics
ŒŽ
Identifying Profile Characteristics
Cross-Correlation Profile Length (m)
Profile Length (m)
Pro
file
Ele
vatio
n (m
m)
Co
rre
latio
n
-1.0
-0.6
-0.2
0.2
0.6
1.0
HypothesizedProfile Segment
ProbablePaver Stops
Overall Research Approach
Phase I – Technology Review
Phase II – Technology Evaluation
Phase III – Technology Demonstration
Phase I – Technology ReviewTechnology Identification
6 Potential Real-Time Smoothness Measuring Systems
Evaluation Plan2 Systems Recommended for Evaluationin Phase IIRule Set / Technical RequirementsTest Section Identification
Real-Time Smoothness TechnologiesNot Ready/Declined Participation:
Dynamic Surface Profiler (Surface Systems & Instruments)
Auto Rod & Level Profiling Device (APR Consultants)
Vehicle Terrain Measurement System (Virginia Tech)
Sliding Profiler (TxDOT-UT Arlington-TTI)
Real-Time Smoothness TechnologiesNot Ready/Declined Participation:
Real-Time Smoothness Technologies
Device 1: GOMACO Smoothness Indicator (GSI)
Real-Time Smoothness Technologies
Device 2: Ames Engineering Real Time Profiler (RTP)
Phase II – Technology EvaluationVirtual Evaluation
Field Evaluation
Recommendations for Technology Refinement
Phase II: Virtual Evaluation
0.12 5
12 5
100.0
0.2
0.4
0.6
0.8
1.0
Gain
Wavelength/Wheelbase
Wavelength Sensitivity
Roughness Indices
Vibration/Misalignment Sensitivity
Phase II: Field EvaluationI-75 Widening and Reconstruction
Adel, Georgia
May 6-12, 2010
CRCP
Real-time Smoothness MeasurementsGOMACO GSI (both GSI bridge and paver-mounted)
Ames Engineering RTP
Supplementary InstrumentationPaver Vibrations / Displacements
Thanks to GDOT and The Scruggs Company
for all of your help!!
Phase II: Field EvaluationReal-time Smoothness Measurements
Paver-mounted GSI and RTP
GSIRTP
Phase II: Field EvaluationReal-time Smoothness Measurements
GSI Machine
Phase II: Field EvaluationReal-time Smoothness Measurements
GSI Machine
Sensors
Phase II: Field EvaluationSupplementary Instrumentation
Paver/Sensor Vibrations / Displacements
Phase II: Field EvaluationPaving Process Documentation
Notes (800+), Photos, Video
In front of the spreader
In front of the paver
Behind the paver
Phase II: Field EvaluationIn front of the spreader
Phase II: Field EvaluationIn front of the paver
Phase II: Field EvaluationBehind the paver
Hardened Concrete Measurements
Reference MeasurementsSurPRO Profiler
High-speed Inertial Profiler (GDOT ICC)
Phase II: Technology EvaluationIdentify Construction Artifacts
Spectral Analysis
Cross-Correlation
Continuous IRI Reporting
Rough Trackline
Rough Trackline
508+50 509+00 509+50Distance (ft)
-600
-400
-200
0
200
400
600
Elevation (mils)
Rough Trackline: Roughness Profile
507+00 508+00 509+00 510+00 511+00Distance (ft)
0
50
100
150
Roughness Profile (in/mi)
Stringless Guidance SystemTotal Stations
Prisms
Stringless Guidance System
-200
0
200Elevation (mils)
491+50 492+00 492+50 493+00 493+50Distance (ft)
-200
0
200
at the pan
behind hand finishers
Stringless Guidance System
Stringless Guidance System
492+20 492+40 492+60 492+80 493+00 493+20
Distance (ft)
20
40
60
80
100
120
140
160
Roughness Profile (in/mi)
at the pan
behind hand finishers
Reinforcement Rebound
Transverse Barsspaced 3 ft c-c
Reinforcement Rebound
493+50 493+60 493+70 493+80 493+90 494+00Distance (ft)
-40
-30
-20
-10
0
10
20
30
40Elevation (mils) Every 3 feet
Pan Motion
Pan Motion
0 100 200 300 400 500 600Time (sec)
0
.1
.2
.3
.4
.5
.6
.7
Vertical Acceleration (g)
Pan Motion
Phase III: Technology DemonstrationField Demonstrations
Around the country
Different contractors
Different paving equipment
Different types of concrete paving
Technology Evaluation
Draft Specifications and Guidelines
Project SchedulePhase I: Technology Review
COMPLETED in 2009
Phase II: Technology EvaluationField Testing COMPLETE: May 2010
Virtual Testing and Reporting Underway
Complete Fall 2010
Phase III: Technology DemonstrationField Demonstrations in 2011
Project Deliverables
Document field data and performance of existing devices
Draft Model Specifications
Draft Guidelines
Immediate Implementation!
Questions?