Structural Health Monitoring (SHM) of Corrosion Potential in Concrete Bridge Decks
11 Oct 2016, 11:00 am
Presented by: Dr. Hani Nassif, Ph.D., P.E., FACI Professor, Rutgers University RE-CAST Associate Director Chair of ACI Committee 444 – Structural Health Monitoring (SHM) and Instrumentation
Structural Health Monitoring (SHM) of concrete structures during and after construction, as well as over its service life, has recently become more attractive to owners and consulting engineers. With the introduction of new materials and construction methods, various types of concrete structures are being instrumented with monitoring devices to determine their performance as well as their response to various loading conditions. Among many other objectives, this includes monitoring concrete performance at the serviceability and durability limit states. Emphasis has been placed on assessment of cracking potential, rebar debonding, and evaluation of rebar corrosion.
This webinar presents an overview of an on-going program for the SHM of concrete bridge decks in the State of New Jersey. In addition to various types of sensors to measure serviceability and other long-term deformations, three types of corrosion sensors are instrumented to monitor the corrosion activities in concrete decks; one is the silver-silver chloride electrode and the other two are multi element probe (MEP) corrosion sensors. The silver-silver chloride electrode provides the corrosive potential by measuring the induced voltage around the rebar. The MEP provides multiple readings of chloride ion content, resistivity and linear polarization resistance. Other types of MEPs were also instrumented on bridge decks during reconstruction in late 1990s to monitor the corrosion potential of the bridge decks. Various types of sensors are installed in precast panels during fabrication as well as in-situ cast concrete decks during and after construction. Moreover, a laboratory-based accelerated corrosion testing program is also performed on concrete specimens using various types of rebars including: Epoxy Coated, MMFX, Black, and Stainless steel rebars. Class A and High Performance Concrete (HPC) specimens with various crack widths and depths are also included. This ongoing study is aimed at correlating laboratory-accelerated corrosion results with long-term performance of the steel in concrete bridge decks under field conditions.
BIO: Dr. Hani H. Nassif, P.E.,is Associate Director of RECAST Center and Professor of Civil and Environmental Engineering at Rutgers, The State University of New Jersey where he has established the Bridge Engineering program. His research interest are in structural health monitoring (SHM) and field testing of infrastructure facilities with emphasis on bridges. Prof. Nassif is a Fellow of the American Concrete Institute (ACI) and past member of its Technical Activity Committee (TAC), Chair of the newly established ACI Committee 444-Structural Health Monitoring (SHM) and Instrumentation, and is the past President of the New Jersey ACI (NJACI) Chapter. He received various awards including AASHTO’s Research Activities Committee “Sweet Sixteen” Project Award (2013), Project Implementation Award from NJDOT (2013), American Council of Engineering Companies (ACEC) Educator of The Year Award (2006) and American Society of Civil Engineers (ASCE) Central New Jersey’s Educator of The Year Award (2005) for excellence in education and his dedication to student learning. He also served as the President of the Rutgers’ Chapter of the Scientific Research Society. He is a member of the Engineering Honor Societies Tau Beta Pi and Chi Epsilon. Dr. Nassif has several years of practical experience in the area of structural design and construction.
Prof. Nassif obtained his B.S. and M.E. in Civil Engineering from The University of Detroit. He received his Ph.D. in Structural Engineering from the Civil and Environmental Engineering Department and a Graduate Certificate in Intelligent Vehicle-Highway Systems (IVHS) from the Electrical Engineering and Computer Science (EECS) Department, both at the University of Michigan-Ann Arbor.
Missouri University of Science and Technology
Re-Cast Tier1 University Transportation Center
Nassif, Hani H., "Structural Health Monitoring (SHM) of Corrosion Potential in Concrete Bridge Decks" (2016). RE-CAST Webinars. 4.
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Video - Presentation
Civil, Architectural and Environmental Engineering