STUDENT SPOTLIGHT: Each month, or every other month, a student will provide a 1-page illustrated abstract of the research they are currently conducting. This is a wonderful opportunity for the student, for our International Society for Concrete Pavements (ISCP) Members, and for the transferring and sharing technology/research through our concrete paving industry.
The ISCP “STUDENT RESEARCH SPOTLIGHT” for December 2024 is Lara Guizi Anoni, a P.D. student in Structural Engineering at University of São Paulo (São Paulo, Brazil).
BIO:
Lara Guizi Anoni is a Ph.D. student in Structural Engineering at the University of São Paulo, under the supervision of Prof. Vladimir Guilherme Haach. She holds a bachelor’s degree in Civil Engineering from the Federal Institute of São Paulo, and a Master of Science in Structural Engineering from the University of São Paulo. Her research centers on advanced Nondestructive Testing (NDT) techniques for concrete structures, with a focus on ultrasonic testing for internal damage detection. In her master’s research, Lara specialized in ultrasonic tomography, collaborating with former ISCP board member Prof. Lev Khazanovich research group at the University of Pittsburgh, where she spent three months as a research scholar. Currently, in her Ph.D., she is expanding her work to include advanced signal processing, with a project titled “Early Detection of Concrete Reinforcement Corrosion using Nonlinear Ultrasonic Techniques and Artificial Neural Networks“. Her research will integrate machine learning algorithms to enhance signal analysis and improve the prediction of corrosion stage, advancing the field of NDT for concrete structures.
TITLE:
Ultrasonic Concrete Tomography: Efficient Image Generation with Fewer Measurements
Structural maintenance costs are unavoidable to preserve a structure’s lifespan. However, they can be minimized by quickly identifying any emerging pathologies. Periodic ultrasonic inspections support preventive maintenance and cost savings over a structure’s lifecycle due to the extensive data they provide without causing structural damage. Accurate measurement and interpretation of ultrasonic test results enable tomographic imaging, improving integrity assessment and aiding more informed maintenance decisions. Despite advancements in imaging techniques, reducing the time needed for transmission tests remains a challenge. This study presents a methodology for generating high-quality images using minimal data by combining advanced reconstruction techniques with a data interpolation algorithm, aiming to encourage greater adoption of ultrasonic tomography in structural inspections.
In this research, three simulated and one experimental concrete sections were used. Various image reconstruction techniques – Ordinary Least Squares (OLS), Algebraic Reconstruction Technique (ART), Simultaneous Iterative Reconstruction Technique (SIRT), and Filtered Backprojection (FBP) – were tested to produce images with the fewest measurements possible. The Inverse Distance Weighting (IDW) interpolation method was integrated to augment measurement points. The methodology began with four evenly spaced measurements, using IDW to expand the data set, enabling robust calculations with the reconstruction methods. In each iteration, four more measurements were added, and IDW interpolation was reapplied. Figure 1 shows that FBP with IDW interpolation successfully identified an internal void using just eight measurements.
The proposed method effectively imaged concrete sections with as few as four measurement lines, and for the experimental model, 20 measurements yielded reliable results (Figure 2). All generated images successfully located the intended voids, and experimental data indicated that imaging could be completed in under 5 minutes, making the approach suitable for building inspections. This methodology is intended as a foundation for the broader use of ultrasonic tomography in NDT for concrete structures.
The methodologies developed in Lara’s master’s research have made a significant contribution to the advancement of ultrasonic transmission tomography, proposing more efficient methodologies that could accelerate its adoption in concrete structures. Additionally, her current Ph.D. project is expected to yield reliable tools for early corrosion prediction, integrating pulse-echo and transmission tomography with nonlinear ultrasonics and machine learning algorithms, ultimately leading to the development of an inspection program.
ISCP would like to feature a “STUDENT RESEARCH SPOTLIGHT” each month, or every other month. If you would like to nominate a student, or if you are a student and would like to nominate yourself or a colleague, please send ISCP an email to: newsletter@concretepavements.org
ALL SPOTLIGHTS:
DECEMBER 2021—Inaugural: Katelyn Kosar, PhD Student-Department of Civil and Environmental Engineering, University of Pittsburgh (Pitt): www.concretepavements.org/2021/12/14/new-at-iscp-student-research-spotlight/
JANUARY 2022: Aniruddha Baral, Ph.D. Candidate-Department of Civil and Environmental Engineering, University of Illinois-Urbana-Champaign: www.concretepavements.org/2022/01/15/student-research-spotlight-jan-2022/
FEBRUARY 2022: Jordan Ouellet, Tech, BEng, MASc, PhD Candidate, Teaching and Research Assistant, University of Illinois at Urbana-Champaign: www.concretepavements.org/2022/02/26/student-research-spotlight-february-2022/
MARCH 2022: Sampath Kumar Pasupunuri, Ph.D. candidate, Pavement Engineering-School of Civil Engineering, University of Nottingham, UK: https://www.concretepavements.org/2022/03/31/student-research-spotlight-march-2022/
APRIL 2022: Anupam B R, Pursuing his doctorate-Indian Institute of Technology Bhubaneswar, India: https://www.concretepavements.org/2022/04/15/student-research-spotlight-april-2022
MAY 2022: Andréia Posser Cargnin, Ph.D. Candidate, Polytechnic School, University of São Paulo (São Paulo, Brazil): https://www.concretepavements.org/2022/05/09/student-research-spotlight-may-2022/
JUNE 2022: Charles Donnelly, Ph.D. Candidate, Department of Civil and Environmental Engineering, University of Pittsburgh (Pittsburgh, USA): https://www.concretepavements.org/2022/06/24/student-research-spotlight-june-2022/
JULY 2022: Amir Malakooti, Ph.D. Candidate, Department of Civil and Environmental Engineering, Iowa State University (Ames, Iowa, USA): https://www.concretepavements.org/2022/07/30/student-research-spotlight-july-2022/
AUGUST 2022: Haoran Li, Ph.D. Candidate, Department of Civil and Environmental Engineering, University of Pittsburgh (Pittsburgh, USA): https://www.concretepavements.org/2022/08/24/student-research-spotlight-august-2022/
SEPTEMBER 2022: Sumit Nandi, Ph.D. Candidate, Department of Civil Engineering, Indian Institute of Technology Roorkee (Roorkee, India): https://www.concretepavements.org/2022/09/18/student-research-spotlight-september-2022/
OCTOBER 2022: Eric Ribeiro da Silva, Ph.D. Candidate, Department of Civil Engineering, Polytechnic School of the University of São Paulo (São Paulo, Brazil): https://www.concretepavements.org/2022/10/20/student-research-spotlight-october-2022/
NOVEMBER 2022: Zachary Brody, Ph.D. Candidate, Department of Civil and Environmental Engineering, University of Pittsburgh (Pittsburgh, USA): https://www.concretepavements.org/2022/11/18/student-research-spotlight-november-2022/
DECEMBER 2022: Jesús Castro Pérez, Ph.D. Candidate, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign (Urbana, USA): https://www.concretepavements.org/2022/12/17/student-research-spotlight-december-2022/
JANUARY 2023: Dan King, Ph.D. Candidate, Department of Civil and Environmental Engineering, Iowa State University (Ames, USA): https://www.concretepavements.org/2023/01/26/student-research-spotlight-january-2023/
FEBRUARY 2023: Kathryn Kennebeck, Ph.D. Candidate, Department of Civil and Environmental Engineering, University of Pittsburgh (Pittsburgh, USA): https://www.concretepavements.org/2023/02/28/student-research-spotlight-february-2023/
MARCH 2023: Sinan Kefeli, Ph.D. Candidate, Department of Civil and Environmental Engineering, Iowa State University (Ames, USA): https://www.concretepavements.org/2023/03/13/student-research-spotlight-march-2023/
APRIL 2023: Niwesh Koirala, Ph.D. Candidate, Department of Civil and Environmental Engineering, Texas Tech University (Lubbock, USA): https://www.concretepavements.org/2023/04/07/student-research-spotlight-april-2023/
MAY 2023: Christian A. Sabillon, Ph.D. Candidate, The University of Texas at Austin (Austin, Texas, USA): https://www.concretepavements.org/2023/05/05/student-research-spotlight-may-2023/
JUNE 2023: Saima Yaqoob, Ph.D. Candidate, KTH (the Royal Institutes of Technology) (Stockholm, Sweden): https://www.concretepavements.org/2023/06/15/student-research-spotlight-june-2023/
JULY 2023: Ricardo Hungria, Ph.D. Candidate, Louisiana State University (Baton Rouge, USA): https://www.concretepavements.org/2023/07/11/student-research-spotlight-july-2023/
AUGUST 2023: Megan Darnell, Ph.D. Candidate, University of Pittsburgh (Pittsburgh, USA): https://www.concretepavements.org/2023/08/07/student-research-spotlight-august-2023/
SEPTEMBER 2023: Jitendra Patel, Ph.D. Candidate, Alma Mater Studiorum – Università di Bologna (Italy): https://www.concretepavements.org/2023/09/05/student-research-spotlight-september-2023/
OCTOBER 2023: Omar K. Omar, Ph.D. Candidate, Louisiana State University (Baton Rouge, USA): https://www.concretepavements.org/2023/10/05/student-research-spotlight-october-2023/
NOVEMBER 2023: Mason Smetana, Ph.D. Candidate, University of Pittsburgh (Pittsburgh, USA): https://www.concretepavements.org/2023/11/07/student-research-spotlight-november-2023/
DECEMBER 2023: Avinash Jha, M.Tech Student, Indian Institute of Technology Gandhinagar (India): https://www.concretepavements.org/2023/12/10/student-research-spotlight-december-2023/
JANUARY 2024: Matthew Sheffield, Ph.D candidate, University of North Carolina at Charlotte (Charlotte, USA): https://www.concretepavements.org/2024/01/13/student-research-spotlight-january-2024/
FEBRUARY 2024: Chintada Chandrasekhar, Ph.D candidate, Indian Institute of Technology Roorkee (Roorkee, India): https://www.concretepavements.org/2024/02/08/student-research-spotlight-february-2024/
MARCH 2024: Subham Jain, Ph.D candidate, Indian Institute of Technology Kanpur (Kanpur, India): https://www.concretepavements.org/2024/03/08/student-research-spotlight-march-2024/
APRIL 2024: Etienne Beya Nkongolo, Ph.D candidate, University of Missouri Kansas-City (Kansas City, USA): https://www.concretepavements.org/2024/04/11/student-research-spotlight-april-2024/
MAY 2024: Shivani Sharma, Ph.D candidate, Indian Institute of Technology Gandhinagar (Gandhinagar, India): https://www.concretepavements.org/2024/05/14/student-research-spotlight-may-2024/
JUNE 2024: Isaac Oyawoye, Ph.D candidate, University of North Carolina at Charlotte (Charlotte, USA): https://www.concretepavements.org/2024/06/16/student-research-spotlight-june-2024/
JULY 2024: Tianzhen Li, Ph.D candidate, Xi’an Jiaotong-Liverpool University and the University of Liverpool (Suzhou, China): https://www.concretepavements.org/2024/07/04/student-research-spotlight-july-2024/
AUGUST 2024: Andrés Gabriel César Torres, Ph.D candidate, Polytechnic School of the University of São Paulo (São Paulo, Brazil): https://www.concretepavements.org/2024/08/06/student-research-spotlight-august-2024/
SEPTEMBER 2024: Bhabya Thakur, Masters student, Indian Institute of Technology Gandhinagar (Gandhinagar, India): https://www.concretepavements.org/2024/09/21/student-research-spotlight-september-2024/
OCTOBER 2024: Alberto Castillo, PhD student, Purdue University (West Lafayette, USA): https://www.concretepavements.org/2024/10/22/student-research-spotlight-october-2024/
NOVEMBER 2024: Salman Amin, MSE student, Youngstown State University (Youngstown, USA): https://www.concretepavements.org/2024/11/07/student-research-spotlight-november-2024/