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Airfield and Highway
Pavements 2017
Pavement Innovation
and Sustainability
Selected Papers from the Proceedings of the
International Conference on Highway Pavements
and Airfield Technology 2017
Edited by
Imad L. Al-Qadi, Ph.D., P.E.
Hasan Ozer, Ph.D.
Eileen M. Vélez-Vega, P.E.
Scott Murrell, P.E.
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AIRFIELD AND HIGHWAY
PAVEMENTS 2017
PAVEMENT INNOVATION AND SUSTAINABILITY
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON
HIGHWAY PAVEMENTS AND AIRFIELD TECHNOLOGY 2017
August 27–30, 2017
Philadelphia, Pennsylvania
SPONSORED BY
The Transportation & Development Institute
of the American Society of Civil Engineers
EDITED BY
Imad L. Al-Qadi, Ph.D., P.E.
Hasan Ozer, Ph.D.
Eileen M. Vélez-Vega, P.E.
Scott Murrell, P.E.
Published by the American Society of Civil Engineers
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Airfield and Highway Pavements 2017
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Preface
An ever-growing number of highway and airport agencies, companies, organizations, institutes, and
governing bodies are embracing principles of sustainability in managing their activities and
conducting business. Overarching goals emphasize key environmental, social, economic, and safety
factors in the decision-making process for every pavement project. Therefore, the theme of the
conference was chosen as “Sustainable Pavements and Safe Airports.” It is dedicated to the state-ofthe-art and state-of-practice areas durability, cost-effective, and sustainable airfield and highway
pavements. In addition, recent advancements and technologies to ensure safe and efficient airport
operations are included.
This international conference provides a chance to interact and exchange information with worldwide
leaders in the fields of highway and airport pavements, as well as airport safety technologies. This
conference brought together researchers in transportation and airport safety technologies, designers,
project/construction managers, academics, and contractors from around the world to discuss design,
implementation, construction, rehabilitation alternatives, and instrumentation and sensing.
The proceedings of 2017 International Conference on Highway Pavements and Airfield Technology
have been organized in four (4) publications as follows:
Airfield and Highway Pavements 2017: Design, Construction, Evaluation, and
Management of Pavements
This volume includes papers in the areas of mechanistic-empirical design methods and
advanced modeling techniques for design of conventional and permeable pavements,
construction specifications and quality, accelerated pavement testing, pavement condition
evaluation, and network level management of pavements.
Airfield and Highway Pavements 2017: Testing and Characterization of Bound and
Unbound Pavement Materials
This volume includes papers in the areas of laboratory and field characterization of asphalt
binders, asphalt mixtures, base/subgrade materials, and recent advances in concrete pavement
technology. This volume also features papers for the use of recycled materials, in-place
recycling techniques and unbound layer stabilization methods.
Airfield and Highway Pavements 2017: Pavement Innovation and Sustainability
This volume is dedicated to the papers featuring most recent technologies used for structural
health monitoring of highway pavements, intelligent compaction, and innovative
technologies used in the design and construction of highway pavements. The volume also
includes papers in the area of sustainability assessment using life-cycle assessment of
highway and airfield pavements and climate change impacts and preparation for pavement
infrastructure.
© ASCE
Airfield and Highway Pavements 2017
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Airfield and Highway Pavements 2017: Airfield Pavement Technology and Safety
This volume is dedicated to recent advances in the area of airfield pavement design
technology and specifications, modeling of airfield pavements, use of accelerated loading
systems for airfield pavements, and airfield pavement condition evaluation and asset
management.
The papers in these proceedings are the result of peer reviews by a scientific committee of more than
90 international pavement and airport technology experts, with three to five reviewers per paper.
Recent research was presented in the technical podium and poster sessions including the results from
current Federal Aviation Administration (FAA) airport design, specifications, and safety
technologies; design and construction of highway pavements; pavement materials characterization
and modeling; pavement management systems; and innovative technologies and sustainability. The
plenary sessions featured the Francis Turner Lecture by Dr. Robert Lytton and the Carl Monismith
Lecture by Dr. David Anderson. In addition, two technical tours were offered: Philadelphia
International Airport and the Center for Research and Education in Advanced Transportation
Engineering Systems (CREATEs) Lab of the Henry M. Rowan College of Engineering at Rowan
University.
Three workshops were presented prior to the conference: hands-on FAA’s FAARFIELD software,
design and construction of permeable pavements, and environmental product declarations.
The editors would like to thank the members of the scientific committee who volunteered their time
to review the submitted papers and offered constructive critiques to the authors. We are also grateful
for the work of the steering committee members in planning and organizing the conference: Katie
Chou, Jeffrey Gagnon, John Harvey, Brian McKeehan, Shiraz Tayabji, and Geoffrey Rowe; as well
as the local organizing committee chaired by Geoffrey Rowe and members including James A.
McKelvey, Timothy Ward, Ahmed Faheem, and Yusuf Mehta for their help with the technical tours.
Finally, we would like to especially thank the ASCE T&DI staff who helped put the conference
together: Muhammad Amer, Mark Gable, Drew Caracciolo, and Deborah Denney.
Imad L. Al-Qadi, Ph.D., P.E., Dist. M.ASCE, University of Illinois at Urbana-Champaign
Hasan Ozer, Ph.D., M.ASCE, University of Illinois at Urbana-Champaign
Eileen M. Vélez-Vega, P.E., M.ASCE, Kimley-Horn Puerto Rico, LLC
Scott D. Murrell, P.E., M.ASCE, Applied Research Associates
© ASCE
iv
Airfield and Highway Pavements 2017
v
Contents
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Innovative Methods for Highway and Airfield Pavements
Configuration of Electrodes for Electrically Conductive Concrete Heated
Pavement Systems ....................................................................................................... 1
Hesham Abdualla, Halil Ceylan, Sunghwan Kim, Mani Mina,
Kasthurirangan Gopalakrishnan, Alireza Sassani, Peter C. Taylor,
and Kristen S. Cetin
Experimental Investigation of Energy Harvesting Prototypes for Asphalt
Roadways ................................................................................................................... 10
Hossein Roshani, Samer Dessouky, and A. T. Papagiannakis
Use of Innovative Techniques and Sustainable Materials in Pavement
Construction
An Evaluation of Cool Pavement Strategies on Concrete Pavements ................. 20
Ram Kumar Veeraragavan, Aaron Sakulich, and Rajib B. Mallick
Synergistic Effect of Cement and Mucilage of Optuntia ficus indica
Cladodes on the Strength Properties of Lateritic Soil. .......................................... 33
Busari Ayobami, Akinmusuru Joseph, Ogunro Vincent, and Ofuyatan Olutokunbo
Study on Performance and Efficacy of Industrial Waste Materials in
Road Construction: Fly Ash and Bagasse Ash....................................................... 45
Aditya Kumar Anupam, Praveen Kumar, G. D. Ransinchung,
and Yogesh U. Shah
Innovations in Concrete Pavements
Mechanical Properties of Polyethylene Terephthalate Particle-Based
Concrete: A Review .................................................................................................. 57
H. Ataei, K. Kalbasi Anaraki, and Rui Ma
Performance and Sustainability Evaluation of In-Place and Central Plant
Recycling Options
Research on Sustainable Pavements: Changes in In-Place Properties of
Recycled Layers Due to Temperature and Moisture Variations ......................... 69
Heather Miller, Jo Sias Daniel, Somayeh Eftekhari, Maureen Kestler,
and Rajib B. Mallick
© ASCE
Airfield and Highway Pavements 2017
Effect of Gradation and Aged Binder Content of Reclaimed Asphalt
Pavement (RAP) on Properties of Cold-Recycled Asphalt Mix ........................... 79
A. Ghavibazoo, M. I. E. Attia, P. Soltis, and H. Ajideh
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Novel Application of Reclaimed Asphalt Pavement in Construction of
New Cold Mix Pavements ........................................................................................ 90
Saman Barzegari, Shelley M. Stoffels, and Mansour Solaimanian
Improving the Mechanical Properties of Cold Mix Asphalt Mixtures
Reinforced by Natural and Synthetic Fibers........................................................ 102
Hayder Kamil Shanbara, Felicite Ruddock, and William Atherton
Design and Construction of Permeable Pavements
Use of Permeable Pavements at Airports ............................................................. 112
James Bruinsma, Kelly Smith, and David Peshkin
Fully Permeable Pavement for Stormwater Management: Progress and
Obstacles to Implementation in California .......................................................... 125
J. Harvey, S. Shan, H. Li, D. J. Jones, and R. Wu
Analysis of the Utilization of Open-Graded Friction Course (OGFC) in
the United States ..................................................................................................... 137
M. Onyango and M. Woods
Interaction of Vehicles-Tire System with Pavements
Alternative Laboratory Characterization of Low Rolling Resistance
Asphalt Mixtures .................................................................................................... 148
M. Pettinari, E. Nielsen, and B. Schmidt
Pavement-Vehicle Interaction Research at the MIT Concrete
Sustainability Hub .................................................................................................. 160
James W. Mack, Mehdi Akbarian, Franz-Josef Ulm, and Arghavan Louhghalam
Evaluation of Tire-Pavement Contact Stress Distribution of Pavement
Response and Some Effects on the Flexible Pavements ...................................... 174
Ainalem Nega and Hamid Nikraz
Intelligent Compaction: Challenges and Future Implementation
Evaluating Stiffness Parameters of Unbound Geomaterial Layers Using
Intelligent Compaction, Plate Load Test, and Light Weight Deflectometer ..... 186
Mehran Mazari, Jorge Beltran, Cesar Tirado, Luis Lemos, and Soheil Nazarian
© ASCE
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Airfield and Highway Pavements 2017
Next Generation Structural Health Monitoring of Highway/Airfield Pavements
Performance Monitoring of Pavement Surface Characteristics with
3D Surface Data ...................................................................................................... 195
You Zhan, Qiang Joshua Li, Guangwei Yang, and Kelvin C. P. Wang
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Civil Infrastructure Health Monitoring and Management Using
Unmanned Aerial Systems ..................................................................................... 207
Akash Vidyadharan, Tyler Carter, Halil Ceylan, Christina Bloebaum,
Kasthurirangan Gopalakrishnan, and Sunghwan Kim
Winter Maintenance of Pavements—Use of Innovative Techniques and Materials
Influence of Deicing Salts on the Water-Repellency of Portland Cement
Concrete Coated with Polytetrafluoroethylene and Polyetheretherketone ...... 217
Ali Arabzadeh, Halil Ceylan, Sunghwan Kim, Kasthurirangan Gopalakrishnan,
Alireza Sassani, Sriram Sundararajan, Peter C. Taylor, and Abdullah Abdullah
© ASCE
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Airfield and Highway Pavements 2017
Configuration of Electrodes for Electrically Conductive Concrete Heated
Pavement Systems
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Hesham Abdualla1; Halil Ceylan2; Sunghwan Kim3; Mani Mina4;
Kasthurirangan Gopalakrishnan5; Alireza Sassani5; Peter C. Taylor6; and
Kristen S. Cetin7
1
Graduate Research Student, Iowa State Univ. E-mail:
[email protected]
Professor, Iowa State Univ. E-mail:
[email protected] (Corresponding Author)
3
Research Scientist, Iowa State Univ. E-mail:
[email protected]
4
Associate Professor, Iowa State Univ. E-mail:
[email protected]
5
Research Associate Professor, Iowa State Univ. E-mail:
[email protected]
5
Graduate Research Student, Iowa State Univ. E-mail:
[email protected]
6
Director, National Concrete Pavement Technology Center. E-mail:
[email protected]
7
Assistant Professor, Iowa State Univ. E-mail:
[email protected]
2
ABSTRACT
This study investigates the effects of the type and configuration of embedded
electrodes on resistive heating performance of an electrically conductive concrete
(ECON) heated-pavement system (HPS). Three ECON slabs – an ECON slab with
perforated galvanized steel angle electrodes, an ECON slab with steel rebar
electrodes, and an ECON slab with perforated galvanized steel angle electrodes with
an isolation layer – were designed and constructed. The resistive heating performance
of the slabs was evaluated by measuring the electric current and ECON slab surface
temperature at specific points during the application of voltage. The results revealed
that the performance of the ECON slab with perforated galvanized steel angle
electrodes was marginally changed when an isolation layer was used, so with respect
to construction practice and cost considerations, an isolation layer is not deemed to be
necessary for constructing large-scale ECON heated pavements. Electrical current
measurements can be used for evaluating the conductivity and the heating capability
of the ECON slabs.
INTRODUCTION
Electrically conductive concrete (ECON) heated pavement systems (HPS) have
increasingly gained attention due to their potential for melting ice and snow while
overcoming the drawbacks of using traditional deicing methods (Xi and Patricia
2000; Arabzadeh et al. 2016a and b; Arabzadeh et al. 2017; Ceylan et al. 2014).
ECON is a versatile material that can be used as a resistive heating medium for
© ASCE
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Airfield and Highway Pavements 2017
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construction of self-heating pavement systems (Sassani et al. 2017). ECON HPS
works by applying a voltage to electrodes embedded in the ECON layer to deliver
power to conductive materials and thereby melt ice and snow (Abdualla et al. 2016).
Electrodes are the ECON HPS components that conduct electric current from an
electrical power supply into the ECON to heat up the ECON surface. In general,
electrodes made of metallic materials are capable of allowing current flow into the
ECON layer since their conductivities are higher than the ECON itself.
Sufficient bonding between the electrodes and the ECON matrix is crucial to
achieving resistive heating performance (Zuofu et al. 2006; Chen and Ping 2012; Tian
and Hu 2012). The use of copper mesh and steel mesh as embedded electrodes in the
ECON layer has been shown to transfer sufficient current into the ECON layer
(Gopalakrishnan et al. 2015; Wu et al. 2013). Steel plate electrode has been
associated with inadequate performance on heating tests because of poor electrodeconcrete bonding (Tuan 2004). Use of perforated galvanized stainless steel with hole
size larger than the maximum aggregate size has been recommended as a satisfactory
method for achieving interlocking between the ECON matrix and the electrodes
(Ceylan 2015), but there are also limited studies in the existing literature investigating
the effects of embedded electrode arrangement in achieving efficient heating
performance of ECON HPS.
This study investigates the effect of electrode configuration on heating
performance of ECON HPS. To this end, ECON slabs with different embedded
electrode types and configurations were prepared and tested to evaluate their
electrical heating performance. The experimental parameters reflecting the heating
performance of ECON slabs were temperature and electrical current readings. The
outcome of this study is expected to provide guidance on electrode design for largescale ECON slab design and construction.
METHODOLOGY
Three prototype ECON slabs (95 cm long × 35 cm wide × 7 cm thick) with various
sets of electrode types, shapes, and configurations were designed and constructed at
the ISU Portland Cement Pavement and Materials Research Laboratory. These units
included: (1) a prototype ECON slab with perforated galvanized steel angle
electrodes, (2) a prototype ECON slab with steel rebar electrodes, and (3) a prototype
ECON slab with perforated galvanized steel angle electrodes and an isolation layer.
Figure 1 depicts the ECON slab with four perforated galvanized steel angle
electrodes (3.8 cm long x 3.8 cm wide x 0.3 cm thick). Electrodes were first placed
inside the formwork as shown in Figure 1(a), and the ECON mix was then poured
into the slab formwork (Figure 1(b)). The ECON mix contained 0.75 % (by total
volume of concrete) of 6-mm-long carbon fiber. The detailed ECON mix proportion
has been presented and discussed in previous studies (Sassani et al. 2015; Abdualla et
al. 2016)
Concrete vibration was used to improve the bond between electrodes and the
ECON mix. The slab was constructed with a 7.6 cm-thick layer of ECON. The ECON
resistivity value was 400 Ω·cm.
© ASCE
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Airfield and Highway Pavements 2017
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As shown in Figure 1(a), the center-to-center distance between each facing
pair of electrodes was 40 cm; the middle electrodes closest to one another were 5 cm
apart. The electrode spacing in the three evaluated ECON slabs was maintained the
same for each set to permit comparison of the efficiencies of the embedded electrodes
in terms of electrical heating performance.
(a)
(b)
Figure 1. Prototype ECON slab with four perforated galvanized steel angle
electrodes: (a) the ECON slab formwork, (b) the ECON slab.
The ECON slab having four steel rebar electrodes was designed and
constructed as shown in Figure 2 (a) and Figure 2 (b). The construction procedure of
this prototype ECON slab shown in Figure 2 was executed similarly to the ECON
with four perforated galvanized steel angles described earlier, except that the
perforated galvanized steel angles were replaced with 10 mm-diameter steel rebar.
The spacing of the electrodes was similar to those of the previous ECON slabs.
(a)
(b)
Figure 2. Prototype ECON slab with four steel rebar as electrodes: (a) the
ECON slab formwork, (b) the ECON slab.
Figure 3 depicts the ECON slab configured with four perforated galvanized
steel angle electrodes and an isolation layer. The slab was divided into two panels by
a 5 cm-thick polystyrene foam isolation layer (Figure 3(a)). The purpose of using the
isolation layer was to block electrical current flow between the two adjacent panels.
Each panel had two perforated galvanized steel angles (3.8 cm long x 3.8 cm wide x
0.3 cm thick) with 40 cm center-to-center distances. The construction procedure was
the same as described earlier.
© ASCE
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Airfield and Highway Pavements 2017
(a)
(b)
Figure 3. Prototype ECON slab with four perforated galvanized steel angle
electrodes and an isolation layer: (a) the ECON slab formwork, (b) the ECON
slab.
RESULTS AND DISCUSSION
The ECON slabs were connected to an AC (60 V) power supply supplying an electric
circuit to power the ECON slab electrodes and generate heat. The voltage was kept
constant during the room temperature (21 oC) tests.
Figure 4 describes surface temperature and current measurement procedures
and results for the prototype ECON slab with four perforated galvanized steel angle
electrodes. The electrodes were connected in such a way that the current flows from
positive (+) to negative (-) (Figure 4(a)). To attain a uniform temperature on the
ECON slab with this electrode configuration, the two electrodes in the middle of the
slabs must be connected to the negative terminal. An infrared thermometer was used
to measure the temperatures at the ECON surfaces, measured and recorded at two
points (LT1and RT1) on the ECON surface (Figure 4(a)). The selected two points for
measurement were located between the two electrodes (LT1 is between 1L and 2L
and RT1is between 3L and 4L) on either side of the slab. The surface temperature at
both locations reached about 29 oC in 60 minutes (Figure 4(b)). RT1 showed slightly
higher temperature readings than LT1 at each point of measurement.
The current in the ECON layer was also measured and plotted separately for
both adjacent panels. The current values for each electrode (L1, L2, L3, and L4) were
recorded during the test (Figure 4(a)). Because the electric current flows from
positive (+) to negative (-), the current values at 1L and 2L were similar, as were the
current values at 3L and 4L (Figure 4(c)). However, the current values at 3L and 4L
were higher than those at 1L and 2L. The higher current values at 3L and 4L could
possibly have led to slightly higher temperature values at RT1.
© ASCE
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Airfield and Highway Pavements 2017
(a)
5
(b)
(c)
Figure 4. Surface temperature and electric current measurements of the
prototype ECON slab with four perforated galvanized steel angle electrodes: (a)
locations of electric current and surface temperature measurements, (b) surface
temperature measurements, (c) electric current measurements.
Figure 5 describes surface temperature and electrical current measurements
for the prototype ECON slab with four steel rebar electrodes. The electrode wiring
circuit was the same as for the ECON slab with perforated galvanized steel angle
electrodes (Figure 5(a)). The surface temperature in both locations reached about 27
o
C after 60 minutes (Figure 5(b)) while the surface temperatures on LT2 at each
measurement time were slightly higher than temperature values for RT2.
Electrical current measurements were also taken at each electrode: 1S, 2S, 3S
and 4S (Figure 5(a)). Figure 5(c) is a current-versus-time plot obtained during the
electric heating test. Since the current flows from positive (+) to negative (-), the
current readings at of 1S and 2S were very similar and the current readings of 3S and
4S were close to one another. The current values at 1S and 2S were higher than those
at 3S and 4S; this is in agreement with the higher surface temperature readings at
LT2.
© ASCE
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Airfield and Highway Pavements 2017
(a)
6
(b)
(c)
Figure 5. Surface temperature and electric current measurements of the
prototype ECON slab with four steel rebar: (a) locations of electric current and
surface temperature measurements, (b) surface temperature measurements, and
(c) electric current measurements.
Figure 6 shows the locations and results of surface temperature and electrical
current measurements for the prototype ECON slab with four perforated galvanized
steel angle electrodes and an isolation layer. This slab was tested under the same
conditions (Figure 6 (a)) as the ECON slabs previously described. The surface
temperatures in both locations were close to one another and reached about 29oC after
60 minutes (Figure 6(b)). As seen in Figure 6(c), the current values in both adjacent
panels were close to one another. This can be attributed to the role of the isolation
layer in preventing the current interference between the panels.
© ASCE
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Airfield and Highway Pavements 2017
(a)
7
(b)
(c)
Figure 6. Surface temperature and electric current measurements of the
prototype ECON slab with four perforated galvanized steel angle electrodes and
an isolation layer: (a) locations of electric current and surface temperature
measurements, (b) surface temperature measurements, (c) electric current
measurements.
The temperature readings on the ECON slab with perforated galvanized steel
angle electrodes without an isolation layer were very close to those obtained when an
isolation layer separated the two adjacent ECON panels, so the use of an isolation
layer to enhance the heating performance of the ECON HPS is not considered
necessary. Using steel rebar electrodes instead of perforated galvanized steel angle
electrodes, lower surface temperatures were achieved; this most likely is because
rebar electrodes provide smaller exposed surface areas than steel angle electrodes.
However, steel rebar to add better structural integrity could be an alternative to the
perforated galvanized steel angle for thinner ECON slabs.
CONCLUSIONS
The goal of this study was to evaluate the effects of using different electrode types
and configurations on resistive heating performance ECON HPS. Three prototype
ECON slabs with two different electrode types and two different electrode
configurations were designed, constructed, and tested: (1) a prototype ECON slab
with perforated galvanized steel angle materials as electrodes, (2) a prototype ECON
slab with steel rebar materials, and (3) a prototype ECON slabs with perforated
galvanized steel angle materials and an isolation layer. The heating performances of
© ASCE
Airfield and Highway Pavements 2017
the slabs were evaluated by measuring surface temperature and electrical current
under fixed experimental conditions, i.e. constant voltage, fixed room temperature,
and identical slab geometry. The major conclusions drawn from this study can be
summarized as follows:
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•
•
•
An ECON slab with perforated galvanized steel angle electrodes provided
adequate resistive heating performance without using an isolation layer, so
difficulties associated with isolation layer placement and cost of isolation
layer construction can be avoided in constructing a large-scale ECON slab.
While the perforated galvanized steel angle and steel rebar electrodes
exhibited a sufficient bond between electrodes and the ECON, better heating
performance was achieved with perforated galvanized steel angle electrodes.
This can be attributed to the larger exposed contact surface areas between the
perforated galvanized steel angle and the ECON.
The steel rebar could be a suitable alternative to the perforated galvanized
steel angle as an electrode for thinner ECON slab (such as concrete overlay)
to add better structural integrity.
The electrical current magnitude can be used as a measure to evaluate the
dispersion of conductive materials inside the ECON layer. Higher current
within the ECON layer corresponds to higher electrical conductivity of the
ECON material.
ACKNOWLEDGEMENTS
This paper was produced from a study conducted at Iowa State University under the
Federal Aviation Administration (FAA) Air Transportation Center of Excellence
Cooperative Agreement 12-C-GA-ISU for the Partnership to Enhance General
Aviation Safety, Accessibility and Sustainability (PEGASAS). The authors would
like to thank the current project Technical Monitor, Mr. Benjamin J. Mahaffay, and
the former project Technical Monitors, Mr. Jeffrey S. Gagnon (interim), Dr. Charles
A. Ishee, and Mr. Donald Barbagallo for their invaluable guidance on this study. The
authors would also like to thank PEGASAS Industry Advisory Board members.
Although the FAA has sponsored this project, it neither endorses nor rejects the
findings of this research. The presentation of this information is in the interest of
invoking comments by the technical community on the results and conclusions of the
research.
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Abdualla, H., Ceylan, H., Kim, S., Gopalakrishnan, K., Taylor, P. C., and Turkan, Y.
(2016). "System requirements for electrically conductive concrete heated
pavements." Transportation Research Record: Journal of the Transportation
Research Board, 2569, 70-79.
Arabzadeh, A., Ceylan, H., Kim, S., Gopalakrishnan, K., and Sassani, A. (2016a).
"Superhydrophobic coatings on asphalt concrete surfaces." Transportation
Research Record: Journal of the Transportation Research Board, 2551, 1017.
© ASCE
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Airfield and Highway Pavements 2017
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Arabzadeh, A., Ceylan, H., Kim, S., Gopalakrishnan, K., and Sassani, A. (2016b).
“Fabrication of polytetrafluoroethylene coated asphalt concrete biomimetic
surfaces: a nanomaterials-based pavement winter maintenance approach.”
In International Conference on Transportation and Development, ASCE, 5464, Houston, TX, June 26-29.
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Airfield and Highway Pavements 2017
Experimental Investigation of Energy Harvesting Prototypes for Asphalt Roadways
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Hossein Roshani1; Samer Dessouky2; and A. T. Papagiannakis3
1
Graduate Research Assistant, CEE Dept., Univ. of Texas at San Antonio, One UTSA Circle,
San Antonio, TX 78249.
2
Associate Professor, CEE Dept., Univ. of Texas at San Antonio, One UTSA Circle, San
Antonio, TX 78249.
3
Professor, CEE Dept., Univ. of Texas at San Antonio, One UTSA Circle, San Antonio, TX
78249.
Abstract
This paper presents preliminary results of the evaluation of several prototype systems for
harvesting energy from the action of traffic on roadways. These systems utilize piezoelectric
elements that respond to traffic-induced compressive stresses, and are referred to as HiSEC
(Highway Sensing and Energy Conversion) modules. The evaluation of the HiSEC prototypes
involves laboratory testing of their power output as a function of stress, finite element (FE)
simulation of their mechanical behavior and economic analysis of the value of the power being
generated. The results available to date suggest that this technology shows promise in powering
equipment independently of the power grid.
INTRODUCTION
In recent years, there has been increasing interest in energy harvesting through transduction.
Three technologies have been used for this purpose, namely electromagnetic, electrostatic and
piezoelectric. Piezoelectric transduction appears to be the most promising, given its widest power
density versus voltage envelop, as shown in Fig. 1.
A number of recent studies explored the use of piezoelectric transduction for harvesting
energy from roadways, e.g., Xiong (2014), Kim et al. (2015), Zhao et al. (2014). Work by Xiong
(2014) at Virginia Tech produced a piezoelectric harvesting system consisting of multiple
cylindrical piezoelectric elements that are compressed by the action of traffic tires (Fig. 2).
Under a traffic volume of 4,000 vehicle per day (167 vehicles/hour), this system generated
voltage ranging from 400 to 700V and electric currents ranging from 0.2 to 0.35 mA. The
corresponding power output was obtained by multiplying voltage by current, yielding a power
range between 0.08 and 2.1 Watts per system.
Work by Kim et al. (2015) at Georgia Southern University involved laboratory testing using
an Asphalt Pavement Analyzer (APA). Two piezoelectric materials were tested one
manufactured by Noliac and the other by Kinetic. APA wheel loads at three levels were applied,
namely 50, 100 and 200 lbs. The maximum resulting voltages for the Noliac were 5, 5, and 15
Volts, respectively, while for the Kinetic were 5, 10 and 20 Volts, respectively. Assuming a
traffic level of 600 vehicles/hour at a speed of 45 mph, such a system could produce up to 2.67
mW of power.
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Airfield and Highway Pavements 2017
FIG 1. Power Density versus Voltage for various Energy Harvesting Technologies (CookChenault et al., 2008).
FIG. 2. Piezoelectric Energy Harvesting System Developed By Xiong (2014).
Zhao et al. (2014) at Tongji University studied power generation form several types of
piezoelectric sensor configurations. These included multiple lead zirconate titanate (i.e., PZT)
prismatic elements referred to as “piles” with circular, square or hexagonal cross sections, as
well as commercially available cymbal-shaped and bridge-shaped elements (Fig. 3). They
performed FE analysis to study the effect of the shape of the PZT piles in producing electric
power output, concluding that the circular cross section piles were preferable. Power generators
involving multiple piles were analyzed. Stress analysis combined with theoretical calculations
established that generators with 8-16 piles each can be used to harvest significant amounts of
electrical power under heavy traffic.
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Airfield and Highway Pavements 2017
FIG. 3. Schematic of PZT Pile Generator (Zhao et al., 2014).
A report was recently completed on behalf of the California Energy Commission (CEC) to
independently evaluate the feasibility of piezoelectric technology in harvesting energy from
roadways and establish if this technology warrants further study (Hill et al., 2013). It evaluated
some of the pilot systems developed by Universities, as well as commercially available
harvesting systems. Three commercially available systems were evaluated in terms of their
vendor output claims, namely, Treevolt (www.treevolt.com), Genziko (www.genziko.com) and
Innowattech (Edel-Ajulay 2010). The first two of these three vendors appear to continue
development of this technology. The Treevolt harvesters, marketed in the USA under the
POWERLeap name, consist of recycled butyl‐propelene membranes sandwiching sheets of
harvesting devices are embedded under the top layer of asphalt concrete and are activated in
compression. The vendor claims that 1.0 km length of roadway equipped with 6,000 Treevolt
harvesters and carrying 600 vehicles per hour can generate approximately 720 kW of power.
Genziko claims that under the same traffic level, their vibration-activated harvesters have the
potential to generate a considerably higher 13,600 kW of power, an amount that was considered
“optimistic” by the CEC report. Innowattech claims that their harvesters can generate 200 kW
under similar traffic levels, assuming that harvesters are placed under both wheel paths. The
CEC study observed that there are considerable differences in the energy output claims made by
different vendors, especially with respect to the assumptions made for the number of sensors
involved and the traffic level. It was recommended adopting a standardized way of reporting
power or energy output by piezo unit surface area, referred to as power or energy density (i.e.,
W/unit area or Wh/unit area, respectively). In evaluating the cost effectiveness of these systems,
the CEC report recommended using the “levelized” cost of energy (LCOE) produced by the
various harvesting systems. The LCOE is defined as the average total life –cycle cost to
construct, operate and maintain a power-generating system divided by its total energy output
over its service life. This report concludes by recommending further field testing of this
technology.
OBJECTIVE
The objective of this paper is to further explore the application of piezoelectric technologies
for harvesting energy from the action of traffic using the roadways. It provides a brief overview
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