Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Nondestructive Corrosion Evaluation Of Reinforced Concrete Bridge Decks With Overlays
Download Nondestructive Corrosion Evaluation Of Reinforced Concrete Bridge Decks With Overlays full books in PDF, epub, and Kindle. Read online Nondestructive Corrosion Evaluation Of Reinforced Concrete Bridge Decks With Overlays ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Nondestructive Corrosion Evaluation of Reinforced Concrete Bridge Decks with Overlays by : Dewei Meng
Download or read book Nondestructive Corrosion Evaluation of Reinforced Concrete Bridge Decks with Overlays written by Dewei Meng and published by . This book was released on 2020 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete corrosion induced by deicing agents can decrease the durability of concrete bridge decks by causing cross-sectional loss of reinforcement, concrete delamination, and spalling owing to the expansion of corroded reinforcement. The installation of overlays can extend the service life of the deteriorated decks. However, overlays present challenges in the evaluation of the corrosion condition of the underlying decks. This laboratory study employed three nondestructive testing (NDT) methods to assess the effects of seven types of overlays on corrosion evaluation for concrete bridge decks. The NDT methods were electrical resistivity (ER), ground-penetrating radar (GPR), and half-cell potential (HCP). The ER method could not evaluate the corrosive environment in the concrete decks through the overlays. The GPR method could detect the corrosive environment through four of the seven overlays. The HCP method could detect the decrease of electrical potential over the actively corroded reinforcement for all seven specimens; however, only two of the seven specimens could be identified as having active corrosion per ASTM C876-15, Standard Test Method for Corrosion Potentials of Uncoated Reinforcing Steel in Concrete . Overlay debonding did not affect GPR and HCP testing results in this study.
Book Synopsis Nondestructive Testing to Identify Concrete Bridge Deck Deterioration by :
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.
Book Synopsis Nondestructive Evaluation of Reinforced Concrete Bridge Elements Subject to Corrosion of Reinforcing Steel by : Hyung-seop Shim
Download or read book Nondestructive Evaluation of Reinforced Concrete Bridge Elements Subject to Corrosion of Reinforcing Steel written by Hyung-seop Shim and published by . This book was released on 1998 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nondestructive Evaluation of Concrete Bridge Decks with Overlays by : Shibin Lin
Download or read book Nondestructive Evaluation of Concrete Bridge Decks with Overlays written by Shibin Lin and published by . This book was released on 2021 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete bridge deck overlays have been used in the United States since 1960 to extend the service life of deteriorated concrete bridge decks and improve reliability. Concrete bridge decks with overlays suffer various types of deterioration, so it is necessary to identify and assess the effectiveness of different nondestructive evaluation (NDE) technologies in the laboratory under controlled conditions and in the field under actual conditions. This report provides an overview of seven types of widely used overlays: asphalt with a liquid membrane, asphalt with a fabric membrane, asphalt without a membrane, silica fume-modified concrete, latex-modified concrete (LMC), epoxy polymer concrete, and polyester polymer concrete. This report identifies and ranks available and promising NDE technologies to assess the performance of different types of overlays and concrete bridge decks. This report describes laboratory validation on overlays for nine commonly used NDE technologies. The nine NDE technologies are: sounding, ultrasonic surface waves (USW), impact echo (IE), ultrasonic tomography (UT), impulse response (IR), ground-penetrating radar (GPR), electrical resistivity (ER), half-cell potential (HCP), and infrared thermography (IRT). This report details the results of laboratory tests validating the NDE technologies for the seven different types of overlays. Field validation using the RABITTM bridge deck assessment tool and manual testing equipment was also performed. Results from the study on which this report is based indicated that GPR was the most effective method for detecting defects in underlying concrete specimens through both bonded and debonded overlays; however, GPR could not detect overlay debonding. Results also showed that USW, IE, and UT were effective stress-wave-based methods for detecting defects under bonded overlays but not asphalt overlays. Researchers found that asphalt overlays at low temperatures (i.e., 32°F or below) improved the applicability of
Book Synopsis Evaluation of Corrosion Inhibitors for Concrete Bridge Deck Patches and Overlays by : Michael M. Sprinkel
Download or read book Evaluation of Corrosion Inhibitors for Concrete Bridge Deck Patches and Overlays written by Michael M. Sprinkel and published by . This book was released on 2003 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results to date of a national pooled fund study initiated in August 1996 to evaluate the long-term performance of bridges and outdoor exposure slabs damaged by chloride-induced corrosion that have concrete containing corrosion inhibiting admixtures and that had topical applications of inhibitors prior to being patched and overlaid. The study includes 156 exposure slabs, 4 bridge decks with overlays, and 1 patched bridge substructure. A total of 136 exposure slabs were constructed to simulate overlay and patch repairs, and 20 full-depth slabs were constructed to simulate new construction. Each repaired slab was constructed with one of four levels of chloride to cause corrosion. The new slabs were ponded to cause corrosion. Previous reports provide details on the construction and initial condition of the exposure slabs and the construction and initial condition of the repaired bridges. The results presented here are based on quarterly nondestructive measurements between September 1997 and June 2001, visual inspections of the exposure slabs, and tensile bond test results and visual inspections of reinforcement removed from the exposure slabs that were patched and overlaid. Overlays cracked and delaminated on exposure slabs that were fabricated with 15 lb/yd3 of chloride ion because of corrosion of the top mat of reinforcement. There was no difference in the performance of overlays constructed with and without inhibitors and topical treatments. Overlays and patches with and without inhibitor treatments placed on and in slabs with 3, 6, and 10 lb/yd3 of chloride are performing satisfactorily. However, results do not show reductions in the tendency for corrosion that can be attributed to the inhibitors. Overlays and patches with and without inhibitor treatments on and in the five bridges indicate mixed results. Corrosion is occurring in the majority of the repairs done with and without inhibitor treatments. The corrosion-inhibiting treatments do not seem to be reducing corrosion in the bridges and, in fact, may be increasing corrosion. It is not obvious that corrosion is occurring in the full-depth slabs constructed with and without inhibitors to represent new construction. The slabs do not show signs of corrosion-induced cracking after 5 years of ponding. Topical applications of inhibitors did not affect the bond strength of the overlays. Overlays containing Rheocrete 222+ and 7 percent silica fume had lower bond strengths. Overlays on base concretes with the higher chloride content had lower bond strengths. In summary, this project does not show any benefit from the use of the corrosion inhibiting admixtures and the topical applications made to the chloride-contaminated concrete surfaces prior to placement of the patches and overlays. Additional years of monitoring of the exposure slabs and bridges may provide useful results.
Book Synopsis Manual on Service Life of Corrosion-damaged Reinforced Concrete Bridge Superstructure Elements by : Ali Akbar Sohanghpurwala
Download or read book Manual on Service Life of Corrosion-damaged Reinforced Concrete Bridge Superstructure Elements written by Ali Akbar Sohanghpurwala and published by Transportation Research Board. This book was released on 2006 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Implementation of a Non-Metallic Reinforced Bridge Deck, Volume 2 by : Robert J. Frosch
Download or read book Implementation of a Non-Metallic Reinforced Bridge Deck, Volume 2 written by Robert J. Frosch and published by . This book was released on 2006-05-15 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Multiple Corrosion Protection Systems for Reinforced Concrete Bridge Decks by : Jason Draper (P.E.)
Download or read book Evaluation of Multiple Corrosion Protection Systems for Reinforced Concrete Bridge Decks written by Jason Draper (P.E.) and published by . This book was released on 2009 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance of Bridge Deck Concrete Overlays by : K. Babaei
Download or read book Performance of Bridge Deck Concrete Overlays written by K. Babaei and published by . This book was released on 1990 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper documents performance of twelve concrete bridge decks in Washington State that were rehabilitated and/or protected with latex-modified concrete and low-slump dense concrete overlays in order to prevent further deicing salt penetration and concrete deterioration caused by reinforcing steel corrosion. An evaluation is made of the factors that have affected the serviceability of those overlaid bridge decks, and recommendations are made based on that evaluation for the design and construction of concrete overlays in order to improve bridge deck performance and to extend bridge deck service life. The factors evaluated are overlay freeze-thaw scaling, surface wear and skid resistance, surface cracking, bond with the underlying deck, chloride and water intrusion, and finally the concrete overlay's ability to retard continued reinforcing steel corrosion and corresponding concrete deterioration.
Book Synopsis Evaluation of Corrosion Protection Methods for Reinforced Concrete Highway Structures by : Jennifer L. Kepler
Download or read book Evaluation of Corrosion Protection Methods for Reinforced Concrete Highway Structures written by Jennifer L. Kepler and published by . This book was released on 2000 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the 1970s, research projects and field studies have been conducted on different methods for protecting reinforced concrete bridges from corrosion damage. The methods include alternative reinforcement and slab design, barrier methods, electrochemical methods, and corrosion inhibitors. Each method and its underlying principles are described, performance results of laboratory and/or field trials are reviewed, and systems are evaluated based on the results of the trials. Using performance results from the studies and costs obtained from transportation agencies, an economic analysis is used to estimate the cost of each system over a 75-year economic life using discount rates of 2%, 4% and 6%.
Book Synopsis Evaluation of Bridge Deck Cathodic Protection by : Carey L. Younger
Download or read book Evaluation of Bridge Deck Cathodic Protection written by Carey L. Younger and published by . This book was released on 1994 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Blacktop Resurfacing of Bridge Decks by : Dunja Mikulic
Download or read book Blacktop Resurfacing of Bridge Decks written by Dunja Mikulic and published by . This book was released on 2001 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Durability of concrete bridge decks to mechanical and environmental effects is examined for the purpose of evaluation of effects of blacktop resurfacing of bridge decks. Aggressive environmental actions on reinforced concrete are described, classified and equivalent environmental loads presented. To explain effects of aggressive environmental loads, concrete transport properties dependent on concrete structure, external effects, mechanisms in concrete, and chemical reactions of aggregates are discussed in detail. Mathematical formulation (model) for durability design of reinforced concrete structures is presented. The model allows estimation of various stages in corrosion progression in reinforced concrete structures: from initiation to propagation of reinforcement corrosion. The process can be effectively described using fuzzy sets. To enable evaluation of susceptibility of reinforced concrete to corrosion attacks, various electrochemical and nonelectrochemical methods are presented and discussed. Various types of overlays, that can be employed for bridge deck protection and/or repair, are discussed with respect to required properties. Special attention is given to application of corrosion inhibitors in both concrete and asphalt concrete, if used as a bridge deck overlay.
Book Synopsis Performance Evaluation of Various Corrosion Protection Systems of Bridges in Colorado by : Yunping Xi
Download or read book Performance Evaluation of Various Corrosion Protection Systems of Bridges in Colorado written by Yunping Xi and published by . This book was released on 2004 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of reinforced concrete structures has been a significant problem for many state and transportation agencies since the application of deicing salts was introduced. Much research has been conducted to develop corrosion protection systems that can prolong the life span of reinforced concrete structures. The Colorado Department of Transportation (CDOT) has several routine and experimental measures to prevent corrosion of the rebar including epoxy-coated rebar, calcium nitrite admixture, organic corrosion inhibitors, a thick cover of quality concrete, and a waterproofing membrane covered by an asphalt overlay. An extensive literature review was performed to collect information on various corrosion protection systems that have been used in the U.S. and around the world. Current CDOT practices in terms of corrosion protection measures were reviewed. A draft inspection plan for Colorado's bridge structures was proposed.
Book Synopsis Inspection of Concrete Bridge Decks with Asphalt Overlays by : Matthew Daniel Baright
Download or read book Inspection of Concrete Bridge Decks with Asphalt Overlays written by Matthew Daniel Baright and published by . This book was released on 1998 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Damage Identification, Progression, and Condition Rating of Bridge Decks Using Multi-modal Non-destructive Testing by : Brian M. Pailes
Download or read book Damage Identification, Progression, and Condition Rating of Bridge Decks Using Multi-modal Non-destructive Testing written by Brian M. Pailes and published by . This book was released on 2014 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ECR Bridge Decks by : Ronald Surendran Harichandran
Download or read book ECR Bridge Decks written by Ronald Surendran Harichandran and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Pt. 1: Delamination of the concrete cover above upper reinforcing bars is a common problem in concrete bridge decks. The detection of delamination is important for bridge maintenance and acoustic non-destructive evaluation (NDE) is widely used due to its low cost, speed, and easy implementation. Pt. 2: The deterioration of reinforced concrete bridge decks due to the corrosion of the steel bars is a common problem. A popular method used to protect the bridge deck from corrosion-induced damage is to use epoxy coated reinforcement (ECR) in place of plain (black) steel. The goal of this project was to determine if the maintenance schedule for bridge decks with black steel can be modified to develop an appropriate maintenance schedule for ECR bridge decks.
Book Synopsis Evaluation of Bridge Deck Delamination Investigation Methods by : Henrique L. M. dos Reis
Download or read book Evaluation of Bridge Deck Delamination Investigation Methods written by Henrique L. M. dos Reis and published by . This book was released on 1998 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: An objective view of the relative advantages and limitations of the nondestructive testing and evaluation methods that are currently used in the inspection of bridge decks is presented and discussed. The three main nondestructive testing technologies that were evaluated are impact-echo, ground penetrating radar, and infrared thermography. Nondestructive testing and evaluation procedures, including methodology and equipment to evaluate concrete bridge decks with asphalt overlays, are also presented and discussed. Current results indicate that a combination of ground penetrating radar and infrared thermography would provide the best methodology for evaluating the structural integrity, e.g., delaminations, of concrete bridge decks with overlays. Furthermore, current results also indicate that the impact-echo method shows promising future development towards the nondestructive evaluation of bridge superstructures.
