Download or read book Measurement of Polarized Potentials in Concrete Bridge Decks written by H. J. Fromm and published by . This book was released on 198? with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Benefits of Measuring Half cell Potentials and Rebar Corrosion Rates in Condition Surveys of Concrete Bridge Decks written by Gerardo G. Clemeña and published by . This book was released on 1992 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The practice of conducting a half-cell potential survey during the assessment of the condition of a concrete deck was reexamined with the objective of eliminating some of the doubts concerning its benefits. It was found that the survey grid size of 4.0 ft recommended in ASTM C 876 had partly contributed to the uncertainty because this spacing is too large to allow complete detection of all the rebar corrosion and the associated concrete delamination that may exist in a deck. It was shown that the effect of rebar corrosion on the potential of the concrete was relatively localized; thus, a grid size of no more than 2.0 ft should be used. Another contributing factor was that the half-cell potential at any location on a concrete deck can fluctuate normally with temperature and other factors. Consequently, in contrast to the interpretation guidelines suggested in ASTM C 876, the numerical value of the potential measured at each location (by itself) would be an imprecise indicator of the condition of the rebar and/or concrete at the location. Instead, the actively corroding rebars are manifested on the concrete surface in large potential gradients that can be readily located in iso-potential contour maps made from the survey results. It was found that the 3LP device provides a simple but time-consuming means for measuring the corrosion rates of rebars, which correlate reasonably well with the metal losses observed in the rebars. However, since corrosion rate also fluctuates with location on a concrete deck and time, the benefit of such a survey would not be fully realized until an appropriate method for determining the representative rebar corrosion rate for a deck and for relating such to remaining service life has been developed.
Download or read book Sensitivity of Electrochemical Impedance Spectroscopy Measurements to Concrete Bridge Deck Properties written by Hillary McKenna Argyle and published by . This book was released on 2014 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the uncontrolled laboratory experiments, a single frequency of 200 Hz was selected for impedance testing. Statistical analyses were performed to compare impedance with more traditional test measurements relating to corrosion of reinforcing steel in concrete bridge decks. Longitudinal and transverse cover, dry and wet resistivity, dry and wet half-cell potential, dry linear polarization, and chloride concentration were determined to be correlated with impedance, with p-values less than 0.15.
Download or read book The Measurement and Correction of Electrolyte Resistance in Electrochemical Tests written by Louis L. Scribner and published by ASTM International. This book was released on 1990 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elimination of IR Error in Measurements of Corrosion in Concrete written by E. Escalante and published by . This book was released on 1990 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The deterioration of concrete bridge decks owing to the corrosion of imbedded steel has generated interest in developing techniques to measure the corrosion of steel in this high-resistivity environment. Several electrochemical polarization methods have been used successfully in the laboratory. This paper describes the use of current interruption to eliminate the IR that arises in measuring the potential of steel during polarization measurements.
Download or read book Handbook on Nondestructive Testing of Concrete written by V. M. Malhotra and published by CRC Press. This book was released on 2004 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Civil engineers will value this resource that examines the tools and techniques used to estimate the in-place strength on concrete, permeation properties that relate to potential durability, and the methods used to assess the internal condition of concrete and the corrosion activity of steel reinforcement.
Download or read book Durability of Concrete Bridge Decks written by National Research Council (U.S.). Transportation Research Board and published by Transportation Research Board National Research. This book was released on 1979 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This synthesis will be of special interest and usefulness to bridge engineers and others seeking information on design, construction, and maintenance of bridge decks. Detailed information is presented on the causes, prevention, evaluation, and rehabilitation of deck deterioration related to corrosion of steel reinforcement."--Avant-propos.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1983 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Nondestructive Testing to Identify Concrete Bridge Deck Deterioration written by and published by Transportation Research Board. This book was released on 2013 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: " TRB's second Strategic Highway Research Program (SHRP 2) Report S2-R06A-RR-1: Nondestructive Testing to Identify Concrete Bridge Deck Deterioration identifies nondestructive testing technologies for detecting and characterizing common forms of deterioration in concrete bridge decks.The report also documents the validation of promising technologies, and grades and ranks the technologies based on results of the validations.The main product of this project will be an electronic repository for practitioners, known as the NDToolbox, which will provide information regarding recommended technologies for the detection of a particular deterioration. " -- publisher's description.
Download or read book Waterproofing Membranes for Concrete Bridge Decks written by David G. Manning and published by Transportation Research Board. This book was released on 1995 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to research, specifications, materials, design, and construction engineers; contract and specification administrators; agency project managers and staff; and concrete bridge deck construction contractors. This synthesis describes the state of the practice with respect to the development and present status of waterproofing membranes for concrete bridge decks. This report of the Transportation Research Board describes the use of waterproofing systems applied to new bridge decks and the rehabilitation of deteriorated concrete bridge decks. In addition, this synthesis describes current practice with regard to methods for assessing the effectiveness of membranes, criteria for use, installation practices, and factors that affect the performance of waterproofing systems in new construction and rehabilitation. Suggestions for future research are also included.
Download or read book Cathodic Protection for Reinforced Concrete Bridge Decks written by John B. Vrable and published by Transportation Research Board National Research. This book was released on 1977 with total page 1304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Bridge Deck Repairs on Corrosion of Reinforcing Steel written by Walter K. Boyd and published by . This book was released on 1979 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cathodic Protection of a Reinforced Concrete Bridge Deck and Soffit Using Metallized Zinc written by Richard A. Carello and published by . This book was released on 1992 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transportation Research Record written by and published by . This book was released on 1989 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: "For more than 50 years, the Transportation Research Record has been internationally recognized as one of the preeminent peer-reviewed journals for transportation research papers from authors in the United States and from around the world. One of the most cited transportation journals, the TRR offers unparalleled depth and breadth in the coverage of transportation topics from both academic and practitioner perspectives. All modes of passenger and freight transportation are addressed in papers covering a wide array of disciplines, including policy, planning, administration, economics and financing, operations, construction, design, maintenance, safety, and more."--Publisher's website
Download or read book Repair of Concrete Bridges written by G. P. Mallett and published by Thomas Telford. This book was released on 1994 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a review of the repair, maintenance and protection of concrete bridges. This book summarizes information from conference papers, research and technical reports, and others. It aims to increase the expertise of structural engineers and safeguard the investment. It presents solutions to the problems and pitfalls that engineers encounter.
Download or read book Recommended Practice for Evaluation of Metal tensioned Systems in Geotechnical Applications written by James Lawrence Withiam and published by Transportation Research Board. This book was released on 2002 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Galvanic Cathodic Protection for Reinforced Concrete Bridge Decks written by David Whiting and published by Transportation Research Board National Research. This book was released on 1981 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
