Transcript Texas Tech University Center for Multidisciplinary Research in Transportation TechMRT Texas Tech University Center for Multidisciplinary Research in Transportation.

Texas Tech University
Center for Multidisciplinary Research in Transportation
TechMRT
Texas Tech University
Center for Multidisciplinary
Research in Transportation
TEXAS TECH UNIVERSITY
Center for Multidisciplinary Research in
Transportation
TechMRT networks TTU with various
transportation research funding organizations.
TechMRT is committed
to all facets of
transportation research.
TEXAS TECH UNIVERSITY
Center for Multidisciplinary Research in
Transportation
Since its inception TechMRT has:
Partnered with 65 faculty members in 14
departments within TTU.
Partnered with 20 researchers from 10
outside universities and institutions
Supported over 300 undergraduate and
graduate students with transportation research
projects.
TEXAS TECH UNIVERSITY
Multidisciplinary Research in Transportation
Project Areas
For Selected Representative Projects
1. Pavement Engineering and Construction
2. Geotechnical Engineering
3. Structures
4. Hydrology
5. Traffic Engineering
6. Environmental and Energy Issues
TEXAS TECH UNIVERSITY
Center for Multidisciplinary Research in
Transportation
Additional Information on
an Individual Project?
Read the Quick Response (QR) code
provided in the “Flip Book” using the I pad
for detailed information on the project and
project investigators.
TEXAS TECH UNIVERSITY
Multidisciplinary Research in Transportation
Project Area 1
Pavement Engineering and
Construction
Construction and Evaluation of Post-Tensioned
Prestressed Concrete Pavement
-Research was encouraged by the success of
one-mile long PCP section on IH-35 in
Waco District
- Purpose was to develop design standards,
early-age behavior, and evaluate
construction procedures
Project Funding Provided by Texas Department of Transportation
Construction and Evaluation of Post-Tensioned Prestressed
Concrete Pavement
Develop
design
standards
Removing concrete from the top of stressing pocket cover
Construction and Evaluation of Post-Tensioned Prestressed
Concrete Pavement
Understand
early-age
behavior
Transverse post‐tensioning bar being bent
Construction and Evaluation of Post-Tensioned Prestressed
Concrete Pavement
Evaluate
construction
procedures
Longitudinal rebar Being Placed
Construction and Evaluation of Post-Tensioned
Prestressed Concrete Pavement
For More Information
on this Project Scan
QR 1 111
In the flip book
Optimization of Fly Ash Use to Stabilize Granular
Base Materials
-Fly ash is a by-product from coal-fired
electric generating plants
- Hydrated fly ash becomes a stiff material
and can be used to form aggregate for
flexible pavement base
Project Funding Provided by Texas Department of Transportation
Optimization of Fly Ash Use to Stabilize Granular
Base Materials
-Specifications
developed for using fly
ash
- Documented
moisture requirements
during construction
-Performed laboratory
compaction tests
Hydrated Fly Ash (40% water content)
Magnified X 5000
Longitudinal rebar Being Placed
Optimization of Fly Ash Use to Stabilize Granular
Base Materials
For More Information
on this Project Scan
QR 2 111
In the flip book
A Testing and Evaluation Protocol to Assess Seal
Coat Binder-Aggregate Compatibility
-Research was needed to move from the concept
of separately controlling the quality of
constitutive materials to an approach based on the
‘systems’ concept
- Purpose was to develop a new testing and
evaluation protocol to assess aggregate-binder
compatibility for seal coats and surface
treatments.
Project Funding Provided by Texas Department of Transportation
A Testing and Evaluation Protocol to Assess Seal Coat BinderAggregate Compatibility
Develop a
new testing
and
evaluation
protocol
Typical Seal Coat Operation
TEXAS TECH UNIVERSITY
Rock
Loss due toResearch
Aggregate-Binder
Incompatibility
Multidisciplinary
in Transportation
TEXAS
TECH UNIVERSITY
Rock
Loss
due to Aggregate-Binder Incompatibility
Multidisciplinary Research in Transportation
A Testing and Evaluation Protocol to Assess Seal
Coat Binder-Aggregate Compatibility
For More Information
on this Project Scan
QR 3 111
In the flip book
Further Development of Binder Quality Assurance
Program
-A more robust QC/QA system is needed to
ensure a supply of binders that both meet
specifications and maintain a consistent level of
quality.
-This research project was launched to create a
quality management system that
utilizes the latest QC/QA principles
Project Funding Provided by Texas Department of Transportation
Population Distribution for
AC-15 5TR Elastic Recovery Test
Population Distribution for AC15-5TR
Elastic Recovery
1.2E5
Normal Dist. Parameters
A_BS = N(68.57, 7.47)
E_CC = N(68.29, 8.60)
T_CV = N(75.77, 4.71)
G_HO = N(72.26, 2.44)
Specification = 55
1E5
Prob. outside Spec.
A_BS = 3.46%
E_CC = 6.11%
T_CV = 0.00%
G_HO = 0.00%
80000
G_HO
60000
No of obs
T_CV
40000
A_BS
E_CC
20000
0
20
30
40
50
60
70
80
90
100
110
120
TxDOT Binder QC/QA Entity
Relationship Diagram
District
Contractor
TxDOT Central
Lab (QA)
Binder
Supplier
Round-Robin Test Program
Can establish correlation between
QC and QA results
Supplier’s
Lab (QC)
Further Development of Binder Quality Assurance
Program
For More Information
on this Project Scan
QR 4 111
In the flip book
Maintenance Solutions for Bleeding and Flushed Pavements
Surfaced with Seal Coat of Surface Treatment
-TxDOT was seeking cost-effective solutions to address the
problem of “bleeding” or “flushing” asphalt for its
pavements with seal coats and surface treatments.
- The basic mechanism associated with both bleeding and
flushing has to do with excess asphalt binder filling the
voids between the aggregate particles.
Project Funding Provided by Texas Department of Transportation
Maintenance Solutions for Bleeding and Flushed Pavements
Surfaced with Seal Coat of Surface Treatment
Bleeding Asphalt Caused by Excessive, Heavy Truck Traffic and
Hot Weather
Maintenance Solutions for Bleeding and Flushed Pavements
Surfaced with Seal Coat of Surface Treatment
Researchers
created Manual
for Maintenance
Solutions
Flushed Pavements
Maintenance Solutions for Bleeding and Flushed Pavements
Surfaced with Seal Coat of Surface Treatment
Pavement Damage – Picking Up of Seal Coat – Caused by
Bleeding
Maintenance Solutions for Bleeding and Flushed Pavements
Surfaced with Seal Coat of Surface Treatment
-Ultra High Pressure water cutter was
implemented to rectify flushed asphalt
surfaced roadways in Texas
- The following video shows a demonstration
of UHP water cutting on a flushed pavement
Maintenance Solutions for Bleeding and Flushed Pavements
Surfaced with Seal Coat of Surface Treatment
Maintenance Solutions for Bleeding and Flushed
Pavements Surfaced with Seal Coat of Surface Treatment
For More Information
on this Project Scan
QR 5 111
In the flip book
TEXAS TECH UNIVERSITY
Multidisciplinary Research in Transportation
Project Area 2
Geotechnical Engineering
Best Practices for Pavement Edge Maintenance
TechMRT defined most effective and efficient
practices and developed training for TxDOT
engineers
Large pavement edge drop offs are a major cause of
accidents and must to be prevented
Maintaining the edge of pavement increases the life
of the road
Project Funding Provided by Texas Department of Transportation
Best Practices for Pavement Edge Maintenance
Developed training course for TxDOT Engineers
Pavement Edge
Drop Off as Deep
as Coke Can
Best Practices for Pavement Edge Maintenance
-Safety is Major concern
Geotechnical Engineering
Best Practices for Pavement Edge Maintenance
Best Practices for Pavement Edge Maintenance
For More Information
on this Project Scan
QR 6 111
In the flip book
Pullout Resistance of Mechanically Stabilized Earth
Reinforcement in Backfills Typically used in Texas
Two major thrust areas:
-Evaluation of pullout resistance factors for specific
backfill-reinforcement combinations used by
TxDOT
-Review and testing of typical reinforcement details
used to circumvent vertical and horizontal
obstructions
Project Funding Provided by Texas Department of Transportation
Geotechnical Engineering
Pullout Resistance of Mechanically Stabilized Earth Reinforcement in
Backfills Typically used in Texas
Evaluation of
pullout
resistance
factors for
specific
backfillreinforcement
Ribbed
Strips
Grids
MSE Reinforcements
Pullout Resistance of Mechanically Stabilized Earth Reinforcement in Backfills
Typically used in Texas (Lawson, Jayawickrama)
Obstructions, Skew Strips
Pullout Resistance of Mechanically Stabilized Earth Reinforcement in Backfills
Typically used in Texas
Obstructions, Splay Grids
TechMRT Designed
and Built Testing
Apparatus for MSE
Pullout Project
Fully AssembledPullout Testing
Reaction Beams
MSE Testing
Apparatus
Strips to be
Mechanically
Pulled out
Pullout Resistance of Mechanically Stabilized Earth
Reinforcement in Backfills Typically used in Texas
For More Information
on this Project Scan
QR 7 111
In the flip book
Evaluating Existing Culverts for Load Capacity
Allowing for Soil Structure Interaction
-The problem facing TxDOT is that when roads or rights-of-way
are widened and/or raised, culverts which pass under them need to
be reassessed for the extension and/or
increased soil loads.
-These in-service culverts, which may have performed satisfactorily
for many years, must be reanalyzed using current American
Association of State Highway and Transportation Officials
(AASHTO) methods.
Project Funding Provided by Texas Department of Transportation
Evaluating Existing Culverts for Load Capacity
Allowing for Soil Structure Interaction
Gage Line Consisting of Two Foot Grid Marks to Determine Truck Positions
Evaluating Existing Culverts for Load Capacity
Allowing for Soil Structure Interaction
For More Information
on this Project Scan
QR 8 111
In the flip book
Non-Destructive Evaluation of Installed Soil Nails
-Recent forensic studies that investigated failure of TxDOT soil
nailed retaining walls revealed that incomplete grouting of soil nails
was a common problem
-The researchers examined the soil nail grout integrity problem from
2 different perspectives.
1) Developed non-destructive test (NDT) technique that could
be used to detect any defects that may be present in a grouted
soil nail.
2) Quantified construction variables (such as installation
procedure, grout consistency, tremie insertion length,
borehole diameter, soil nail angle, etc.) that may influence
the integrity of the grout column
Project Funding Provided by Texas Department of Transportation
Geotechnical Engineering
Non-Destructive Evaluation of Installed Soil Nails
Face Sloughing
Caused by
Unnailed Cut
Non-Destructive Evaluation of Installed Soil Nails
Test Setup Used
for Soil Nail Load
Testing
Non-Destructive Evaluation of Installed Soil Nails
Drilling Hole
for Soil Nail
Installation
Non-Destructive Evaluation of Installed Soil Nails
For More Information
on this Project Scan
QR 9 111
In the flip book
Water Intrusion in Base/Subgrade Materials at Bridge
Ends
-Departments of transportation spend considerable time
and money repairing pavement failures that occur in the
base or subgrade materials near bridge ends. Investigation
of these failures often reveal saturated base/subgrade
materials.
-The objectives of this research were to determine all
possible sources for water intrusion, develop methods to
recognize in-the-field causes of water collection at bridge
approaches, and to develop new repair methods that can
be economically implemented in the field to minimize
water intrusion or remove water from soils.
Project Funding Provided by Texas Department of Transportation
Water Intrusion in Base/Subgrade Materials at Bridge
Ends
Water Collected
Underneath
Approach Slab
Project Funding Provided by Texas Department of Transportation
Water Intrusion in Base/Subgrade Materials at Bridge
Ends
-Various bridge sites were investigated
-Researchers recommended several preventative
measures for surface drainage, crack sealing and
subsurface drainage
-Researchers recommended a detailed underdrain
design for a specific bridge end suffering constant
water seepage
Project Funding Provided by Texas Department of Transportation
Water Intrusion in Base/Subgrade Materials at Bridge
Ends
For More Information
on this Project Scan
QR 10 111
In the flip book
TEXAS TECH UNIVERSITY
Multidisciplinary Research in Transportation
Project Area 3
Structural Engineering
Identification of Natural Frequencies of Pedestrian
Bridge No. 3 in Lubbock Post Retrofit
Pedestrian Bridge near
stadium swayed when massive
crowd walked in rhythm
Project Funding Provided by Texas Department of Transportation
Texas Tech Pedestrian Bridge Swaying after Football Game
Identification of Natural Frequencies of Pedestrian
Bridge No. 3 in Lubbock Post Retrofit
For More Information
on this Project Scan
QR 11 111
In the flip book
Study of Elastomeric Bearings for Superelevated
U-Beam Bridges
-Elastomeric bearings are used to support Texas Ubeams as an alternative to I-beams
- Purpose was to determine whether there was a
need to consider the transverse superelevation
during new bearing design and if so, whether there
was a need to address existing U-beam bridges
Study of Elastomeric Bearings for Superelevated U-Beam
Bridges
Modifications
to current
design methods
were proposed
based upon
finite-element
models,
laboratory
testing and
field
observations
Typical
Transverse
Displacement
Elevation View of
Laboratory
Testing Frame
Elevation View of Longitudinal
Rams
Study of Elastomeric Bearings for Superelevated
U-Beam Bridges
For More Information
on this Project Scan
QR 12 111
In the flip book
Rapid Bridge Replacement Techniques
-Destruction of the World Trade Center in 2001 exposed
the vulnerability of domestic structures to terrorist attacks
and other extreme events
-A review of terrorist targets revealed major transportation
infrastructure was high on terrorists’ list
-Investigated best practices for rapidly replacing bridges
damaged by extreme events
Project Funding Provided by Texas Department of Transportation
Rapid Bridge Replacement Techniques
Picture Courtesy of the Oklahoma Department of Transportation
Rapid Bridge Replacement Techniques
Acrow Temporary Truss Panel Bridge and Supports
Rapid Bridge Replacement Techniques
For More Information
on this Project Scan
QR 13 111
In the flip book
Alternate Vertical Shear Reinforcement in
Prestressed Concrete Beams
-The Texas Department of Transportation (TxDOT) commonly uses
prestressed I-beams to construct bridges. Currently, TxDOT permits
the substitution of welded wire fabric (WWF) for the traditional, 60ksi, steel shear reinforcement, but load tests were needed to verify
the behavior.
-Forty-three load tests were conducted on the 18 specimens using
four different load/support configurations. Load comparisons were
made against AASHTO limits, and beam response comparisons were
made against the standard TxDOT design.
Project Funding Provided by Texas Department of Transportation
Alternate Vertical Shear Reinforcement in
Prestressed Concrete Beams
Typical Test
Set Up
Alternate Vertical Shear Reinforcement in
Prestressed Concrete Beams
End Region Shear Failure
Alternate Vertical Shear Reinforcement in
Prestressed Concrete Beams
For More Information
on this Project Scan
QR 14 111
In the flip book
TEXAS TECH UNIVERSITY
Multidisciplinary Research in Transportation
Project Area 4
Hydrology
Hydraulic Performance Evaluation of Horizontal Inlet
Type-H
-Type-H inlets are frequently used by the TxDOT as median
drains for divided highways
- Despite frequent use, engineers did not have adequate
information to estimate the hydraulic performance of these
structures
- The researchers conducted physical model experiments of
various Type-H drop inlet configurations in order to
determine the hydraulic performance of these structures
Project Funding Provided by Texas Department of Transportation
Interdisciplinary Research in Collaboration with the TTU Water Resources Center
Hydraulic Performance Evaluation of Horizontal Inlet Type-H
Determine
the
hydraulic
performance
of Type-H
Inlets
Representative Type-H Inlet
Hydraulic Performance Evaluation of Horizontal Inlet Type-H
View of System
with Experiment
in-progress
Hydraulic Performance Evaluation of Horizontal
Inlet Type-H
For More Information
on this Project Scan
QR 15 111
In the flip book
Guidance for Design in Areas of Extreme Bed-Load
Mobility
-A large number of low-water crossings are used in Texas
- Over a four-year period from 1998–2002, a review of TxDOT’s
Maintenance Management Information System (MMIS) records
revealed that at least $672K was spent by TxDOT in Edwards, Kimble,
and Real Counties for removal of sediment deposits and low-water
crossing repair or replacement.
- The objectives of this project are to develop science and technology to
understand the source of the problem and
develop design guidelines for implementing results of the research.
Project Funding Provided by Texas Department of Transportation
Interdisciplinary Research in Collaboration with the TTU Water Resources Center
Guidance for Design in Areas of Extreme Bed-Load
Mobility
Paks crossing of Johnson Fork on FM 2169 after a flood
event in 2000.
Guidance for Design in Areas of Extreme Bed-Load
Mobility
For More Information
on this Project Scan
QR 16 111
In the flip book
Investigate the Availability of Technology To Identify Buried
Non-Metallic Pipelines: Findings and Recommendations
-The project was geared toward identifying state-of-the-art technologies which can be
used to precisely locate and identify
underground non-metallic pipelines.
-It was found that technologies are available which can be used to locate and identify
non-metallic pipelines.
-However, the following technology constraints must be taken into consideration
during the selection process: (1) any one technology cannot locate all types of utilities,
(2) soil type is a major factor affecting location and identification of utilities, (3)
interference from nearby objects is noticeable in some cases, e.g., power lines and
transformers, (4) effective depth for utility location and identification is a limiting
factor, (5) resolution of images for smaller diameter utilities at greater depths is a
problem, and (6) initial cost is far greater than what the market is willing to pay for the
services.
Project Funding Provided by Texas Department of Transportation
Investigate the Availability of Technology To Identify Buried
Non-Metallic Pipelines: Findings and Recommendations
Existing Underground
Utilities in New York City
Investigate the Availability of Technology To Identify Buried
Non-Metallic Pipelines: Findings and Recommendations
For More Information
on this Project Scan
QR 17 111
In the flip book
TEXAS TECH UNIVERSITY
Multidisciplinary Research in Transportation
Project Area 5
Traffic Engineering
Revision of AASHTO Fatigue Design Loadings for Signs,
Luminaires, and Traffic Signal Structures, for Use in Texas
- Provisions for fatigue design in Section 11 of the Standard
Specifications for Structural Supports for Highway Signs,
Luminaires and Traffic Signals issued in 2001 have made it
difficult to find economical AASHTO-compliant design
solutions for cantilevered traffic signal structures.
- The objective of this project was to re-evaluate the fatigue
design loads for traffic signal structures in the AASHTO
specifications
Project Funding Provided by Texas Department of Transportation
Texas Tech Pedestrian Bridge Swaying after Football Game
Revision of AASHTO Fatigue Design Loadings for Signs,
Luminaires, and Traffic Signal Structures, for Use in Texas
Re-evaluate the
fatigue design
loads
for traffic signal
structures in the
AASHTO
specifications
Two Cantilever Traffic Signal Structures Tested
at Reese Technology Center
Revision of AASHTO Fatigue Design Loadings for Signs,
Luminaires, and Traffic Signal Structures, for Use in Texas
For More Information
on this Project Scan
QR 18 111
In the flip book
Web Public Transit Information System
-The basic function of W-PTIS is to provide real-time information to Tech
students about the position of buses and their predicted arrival time to the
stations.
- The extended functions will include an interactive on-line riding guidance
system that helps students find the best bus route from any origin to any
destination in Tech camps, and an extension to selected off-campus routes.
-The information and bus arrival notification are then made available on the
World Wide Web and to wireless devices including internet capable cell
phones, Palm Pilots, and other Personal Digital Assistants (PDAs). The team
is planning to develop I Phone app and Android app for the system.
Project Funding Provided by Texas Department of Transportation
TEXAS TECH UNIVERSITY
Multidisciplinary Research in Transportation
Web Public Transit Information System
For More Information
on this Project Scan
QR 19 111
In the flip book
Synthesis of Successful Bicycle Planning
in Mid-Size Cities
-The primary focus is on cities of 100,000 to 300,000
in population, where city resources are limited.
-Researchers have studied what other cities have done
with respect to accommodating bicycles, what
success stories exist where cities have provided a
system that is well-designed and marked, and is
supported by both bicyclists and motorists.
Project Funding Provided by Texas Department of Transportation
Synthesis of Successful Bicycle Planning
in Mid-Size Cities
Synthesis of Successful Bicycle Planning
in Mid-Size Cities
Synthesis of Successful Bicycle Planning
in Mid-Size Cities
Key Findings
•Safety is the primary concern for bicyclists
•Local government agencies are more effective at promoting bicycling
•MPOs are most effective when making funding decisions but often ineffective
otherwise
•More successful communities are active in improving bicycle conditions
•There are few differences between city sizes for bicycle users and government
officials
•Bicyclists in larger cities are more comfortable bicycling greater distances
•Motorist attitudes are generally negative and seemingly worsen with
population increase
•Level of service likely has little effect on success in mid-size cities
•It is likely that a bike plan is underutilized in mid-size cities
•A dedicated TA bicycle advocate may be an advantage of a larger population
Synthesis of Successful Bicycle Planning
in Mid-Size Cities
For More Information
on this Project Scan
QR 20 111
In the flip book
TEXAS TECH UNIVERSITY
Multidisciplinary Research in Transportation
Project Area 6
Environmental and Energy Issues
Environmental Characteristics of Traditional
Construction and Maintenance Materials
-Non-hazardous recycled materials (NRMs)
have been held to strict environmental
standards
-The purpose of this research was to
develop a baseline using traditional
materials to which NRMs could be
compared
-Measured metals and semi-volatile
organics in leachate for recycled materials
generated during a TCLP test
-One recommendation was to set the TCLP
leachate concentration equal to the Texas
Risk Reduction Standard 2 value given in
30TAC335, Subchapter S.
Project Funding Provided by Texas Department of Transportation
Environmental Characteristics of Traditional
Construction and Maintenance Materials
Materials tested:
-Aggregate (limestone, sandstone, caliche,
siliceous gravel, siliceous sand, and LRA)
-Portland cement
-Bituminous binders, including AC-3, AC-5, PG64-22, PG 70-22, AC-15-5T, MG-30, MC-30,
and a rapid cure patch mix
-Fly ash, bottom ash, lime, RAP, and RCP
Environmental Characteristics of Traditional
Construction and Maintenance Materials
For More Information
on this Project Scan
QR 21 111
In the flip book
Handling Issues for Lead and Asbestos in Bridge
Construction
- Each of the approximately 50,000 bridges in the state of
Texas has the potential for containing hazardous materials
such as lead-based paint (LBP) and asbestos-containing
material (ACM)
- In order to ensure worker safety and comply with
federal regulations, TxDOT desired to develop a set of
policies and procedures that will allow TxDOT to deal
with lead and asbestos handling issues in an economic
manner with limited liability exposure in bridge
construction and repair
Project Funding Provided by Texas Department of Transportation
Handling Issues for Lead and Asbestos in Bridge Construction
Transit Pipe Containing Asbestos
Handling Issues for Lead and Asbestos in Bridge Construction
Coatings on Wood Posts or Timber Piles Containing LBP
Handling Issues for Lead and Asbestos in Bridge
Construction
For More Information
on this Project Scan
QR 22 111
In the flip book
TxDOT and Electric Power Transmission Lines
- Studies have indicated that the existing
transmission network is unable to support significant
transmission of electricity from additional wind
energy generation
- The purpose of this study was to provide baseline
information and case studies to better define
TxDOT’s role in electric power transmission lines
and partnering with public utilities
Project Funding Provided by Texas Department of Transportation
TxDOT and Electric Power Transmission
Lines
TechMRT and
the University of
Texas Center for
Transportation
Research
worked with
various groups
that had stakes in
electric power
Transmission
General Electric 1.5 MW turbine near Matador, TX
TxDOT and Electric Power Transmission
Lines
Dominion Transmission Pole Located on VDOT ROW
TxDOT and Electric Power Transmission Lines
For More Information
on this Project Scan
QR 23 111
In the flip book
Utilizing Compost as an Alternative Method to Standard Seedlings
- Practical highway right-of-way design for all the roads includes
consideration of the cross-sectional slope, the longitudinal slope,
and the type of grass or other vegetation.
-When vegetation is used as a protective cover, the time between
site preparation and the achievement of an adequate ground cover
is critical
- Our research plan examined the effectiveness of using compost
to establish roadside vegetation in three diverse geographical
regions of the state of Texas
Project Funding Provided by Texas Department of Transportation
Utilizing Compost as an Alternative Method to Standard Seedlings
Examined the
effectiveness of
using compost to
establish roadside
vegetation
Utilizing Compost as an Alternative Method to Standard
Seedlings
Representative Vegetation Quadrants
Utilizing Compost as an Alternative Method to Standard
Seedlings
For More Information
on this Project Scan
QR 24 111
In the flip book
Demonstration of the Use of Recycled Roofing
Shingles in Hot-Mix Asphalt
Researchers investigated the properties and
use of waste shingles in hot-mix asphalt
Both post-industrial and post-consumer
shingles were considered
Mixes from recommended design
specifications were demonstrated in field
trials
Project Funding Provided by Texas Department of Transportation
Demonstration of the Use of Recycled Roofing
Shingles in Hot-Mix Asphalt
Demonstration of the Use of Recycled Roofing
Shingles in Hot-Mix Asphalt
For More Information
on this Project Scan
QR 25 111
In the flip book
Use of Glass Cullet in Roadway Construction
-Researcher developed specifications for using
glass cullet in roadway construction
-Maximum percentages of glass cullet in
conventional aggregate mixes were developed
through laboratory testing
-Glass cullet was used as a base material for a
flexible pavement
Project Funding Provided by Texas Department of Transportation
Use of Glass Cullet in Roadway Construction
Base material with 15% glass cullet
Use of Glass Cullet in Roadway Construction
For More Information
on this Project Scan
QR 26 111
In the flip book
Best Practices for TxDOT on Handling Wildfires
-Recent years have been record setting for wildfires in Texas
-TxDOT has responded to many critical situations
-The purpose of this current project is to document lessons learned
during the recent wildfire events
-Best practices will be identified and reported
-Researchers will prepare training materials for TxDOT operations
during wildfires
Project Funding Provided by Texas Department of Transportation
Best Practices for TxDOT on Handling Wildfires
Texas Wildfire Near McDonald Observatory
Best Practices for TxDOT on Handling Wildfires
Best Practices for TxDOT on Handling Wildfires
For More Information
on this Project Scan
QR 27 111
In the flip book