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Author : A. B. Tee
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book Corrosion Assessment of Reinforcing Steel in Bridge Decks written by A. B. Tee and published by . This book was released on 1986 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John P. Broomfield
Publisher : CRC Press
ISBN 13 : 1000822486
Total Pages : 305 pages
Book Rating : 4.0/5 (8 download)
Download or read book Corrosion of Steel in Concrete written by John P. Broomfield and published by CRC Press. This book was released on 2023-01-31 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of Steel in Concrete: Understanding, Investigation and Repair is a guide for designing, constructing and maintaining reinforced concrete structures, such as buildings and bridges which are subject to reinforcement corrosion. It presents the basics of theory and practice in steel corrosion in concrete and reviews the latest research and developments, such as progress on measuring the corrosion threshold for chloride-induced corrosion. This third edition compares the currently proliferating major national and international standards and guidance documents. New developments are considered, such as hybrid anodes for electrochemical treatment and the latest research and developments in assessment, such as the use of ground penetrating radar to measure the chloride content of the concrete cover. It overhauls coverage of electrochemical repair and rehabilitation techniques and outlines recent innovations in structural repair and construction and investigates their implications for durability. The book is ideal for practitioners and graduate students in structural engineering and concrete technology.
Author : Ebrahim K. Abbas
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (883 download)
Download or read book Corrosion Assessment for the Failed Bridge Deck Closure Pour at Mile Marker 43 on I-81 written by Ebrahim K. Abbas and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of reinforcing steel in concrete is a significant problem around the world. In the United States, there are approximately 600,000 bridges. Of those bridges, 24% are considered structurally deficient or functionally obsolete based on the December 2010 statistics from the Federal Highway Administration. The primary cause is chloride attack from deicing salts, which corrodes the reinforcing steel. Different solutions have been developed and used in practice to delay and prevent corrosion initiation. The purpose of this research was to investigate the influence of corrosion and shrinkage on the failure mechanism that occurred on an I-81 bridge deck. After 17 years in service, a 3 ft by 3 ft closure pour section punched through. The closure was positioned under the left wheel path of the southbound right lane of the bridge deck. The bridge deck had been replaced in 1992 as part of a bridge rehabilitation project, and the reinforcement was epoxy coated. Four 4.5 ft by 10 ft slab sections, containing the closure, were saw cut from the deck, removed, and transported to the Virginia Tech Structures and Materials Research Laboratory for further evaluation. Also, for comparison, three new slabs were fabricated as part of the assessment program. Corrosion evaluation and concrete shrinkage characterization were conducted in this study. The corrosion evaluation study included visual observation, clear concrete cover depth, concrete resistivity using single point resistivity, half-cell potential, and linear polarization using the 3LP device. Shrinkage was characterized on the lab cast slabs only. This consisted of monitoring shrinkage behavior of the specimens for 180 days and comparing of the data with five different shrinkage models. The joints of the lab cast specimens were monitored for cracking and leaking. Based on the research results, it is recommended that similar joints be inspected for leaking and evidence of reinforcement corrosion every two years and all similar joints should be sealed to prevent leaking. In addition, it is recommended that construction joints in future decks built with staged construction use corrosion resistant reinforcement.
Author : Vernon J. Marks
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (1 download)
Download or read book Detection of Steel Corrosion in Bridge Decks and Reinforced Concrete Pavement written by Vernon J. Marks and published by . This book was released on 1977 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Iowa Department of Transportation initiated this research to evaluate the realiability, benefit and application of the corrosion detection device. Through field testing prior to repair projects and inspection at the time of repair, the device was shown to be reliable. With the reliability established, twelve additional devices were purchased so that this evaluation procedure could be used routinely on all repair projects. The corrosion detection device was established as a means for determining concrete removal for repair. Removal of the concrete down to the top reinforcing steel is required for all areas exhibiting electrical potentials greater than 0.45 Volt. It was determined that the corrosion detection device was not applicable to membrane testing. The corrosion detection device has been used to evaluate corrosion of reinforcing steel in continuously reinforced concrete pavement.
Author : Ebrahim K. Abbas
Publisher :
ISBN 13 :
Total Pages : 51 pages
Book Rating : 4.:/5 (883 download)
Download or read book Corrosion Assessment for the Failed Bridge Deck Closure Pour at Mile Marker 43 on I-81 written by Ebrahim K. Abbas and published by . This book was released on 2014 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of reinforcing steel in concrete is a significant problem around the world. In the United States, there are approximately 600,000 bridges. Of those bridges, 24% are considered structurally deficient or functionally obsolete based on the December 2010 statistics from the Federal Highway Administration. The primary cause is chloride attack from deicing salts, which corrodes the reinforcing steel. Different solutions have been developed and used in practice to delay and prevent corrosion initiation. The purpose of this research was to investigate the influence of corrosion and shrinkage on the failure mechanism that occurred on an I-81 bridge deck. After 17 years in service, a 3 ft by 3 ft closure pour section punched through. The closure was positioned under the left wheel path of the southbound right lane of the bridge deck. The bridge deck had been replaced in 1992 as part of a bridge rehabilitation project, and the reinforcement was epoxy coated. Four 4.5 ft by 10 ft slab sections, containing the closure, were saw cut from the deck, removed, and transported to the Virginia Tech Structures and Materials Research Laboratory for further evaluation. Also, for comparison, three new slabs were fabricated as part of the assessment program. Corrosion evaluation and concrete shrinkage characterization were conducted in this study. The corrosion evaluation study included visual observation, clear concrete cover depth, concrete resistivity using single point resistivity, half-cell potential, and linear polarization using the 3LP device. Shrinkage was characterized on the lab cast slabs only. This consisted of monitoring shrinkage behavior of the specimens for 180 days and comparing of the data with five different shrinkage models. The joints of the lab cast specimens were monitored for cracking and leaking. Based on the research results, it is recommended that similar joints be inspected for leaking and evidence of reinforcement corrosion every two years and all similar joints should be sealed to prevent leaking. In addition, it is recommended that construction joints in future decks built with staged construction use corrosion resistant reinforcement.
Author : Walter K. Boyd
Publisher :
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4.3/5 (555 download)
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:
Author : E. Escalante
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (31 download)
Download or read book A Bibliography on the Corrosion and Protection of Steel in Concrete written by E. Escalante and published by . This book was released on 1979 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book תכנית לפיתוח מיומנויות תקשורת לא מילולית written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lisa M. Samples
Publisher :
ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.:/5 (1 download)
Download or read book Methods of Corrosion Protection and Durability of Concrete Bridge Decks Reinforced with Epoxy-coated Bars - Phase I written by Lisa M. Samples and published by . This book was released on 1999 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher : Transportation Research Board
ISBN 13 : 0309129338
Total Pages : 96 pages
Book Rating : 4.3/5 (91 download)
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.
Author : California. Office of Transportation Laboratory
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.3/5 (555 download)
Download or read book Corrosion Testing of Bridge Decks written by California. Office of Transportation Laboratory and published by . This book was released on 1975 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Habib Tabatabai
Publisher :
ISBN 13 :
Total Pages : 376 pages
Book Rating : 4.3/5 (555 download)
Download or read book Evaluation of Select Methods of Corrosion Control, Corrosion Prevention, and Repair in Reinforced Concrete Bridges written by Habib Tabatabai and published by . This book was released on 2009 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gerardo G. Clemeña
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (359 download)
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.
Author : Matthew O'Reilly
Publisher :
ISBN 13 :
Total Pages : 522 pages
Book Rating : 4.:/5 (851 download)
Download or read book Evaluation of Multiple Corrosion Protection Systems for Reinforced Concrete Bridge Decks written by Matthew O'Reilly and published by . This book was released on 2011 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The performance of corrosion protection systems for reinforcing steel in concrete is evaluated. In addition to conventional and conventional epoxy-coated reinforcement, the corrosion protection systems tested include epoxy coatings with improved adhesion to the underlying steel, conventional and conventional epoxy-coated reinforcement used in conjunction with concrete containing one of three corrosion inhibitors, DCI-S, Rheocrete 222+, or Hycrete, epoxy-coated reinforcement with a microencapsulated calcium nitrite primer, multiple-coated reinforcement with a layer of zinc between the epoxy and steel, and pickled 2205 duplex stainless steel. The systems are evaluated using bench-scale and field tests. Two bridges in Kansas, cast with 2205 stainless steel, are monitored using corrosion potential mapping. Epoxy-coated and multiplecoated bars are evaluated to determine the effect of corrosion loss and time on the disbondment of the epoxy coating. Conventional, galvanized, and epoxy-coated reinforcement are evaluated using impressed current to determine the corrosion loss required to crack concrete for each system. A finite element model is developed to represent general and localized corrosion, and the results are used to develop a relationship between concrete cover, bar diameter, and area of bar corroding, and the corrosion loss required to crack concrete. An analysis of pore solutions expressed from cement pastes containing corrosion inhibitors is performed, with pH and selected ion concentrations measured from solutions collected one and seven days after casting. The results obtained from bench-scale and field test specimens are used to estimate cost effectiveness for each system under a 75-year service life. The results show epoxy coatings significantly reduce the corrosion rate compared to conventional reinforcement. Corrosion inhibitors significantly reduce corrosion rates in uncracked concrete. In cracked concrete, corrosion inhibitors also reduce corrosion rates, but their relative effectiveness is reduced. Specimens containing Hycrete exhibit the lowest corrosion rates; however, field specimens containing Hycrete also show signs of scaling. Epoxies with improved adhesion exhibit no improvement over conventional epoxy-coated reinforcement in terms of corrosion rate or disbondment of the epoxy coating. Multiple-coated reinforcement exhibits significantly less disbondment than epoxy-coated reinforcement. Pickled 2205 reinforcement exhibits the least corrosion among all systems tested. Testing of conventional and galvanized reinforcement indicates galvanized reinforcement requires more than twice as much corrosion loss to crack the surrounding concrete compared to conventional reinforcement."--Technical report documentation page.
Author : fib Fédération internationale du béton
Publisher : fib Fédération internationale du béton
ISBN 13 : 2883940894
Total Pages : 123 pages
Book Rating : 4.8/5 (839 download)
Download or read book Corrosion Protection of Reinforcing Steels written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2009-01-01 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has long been recognised that corrosion of steel is extremely costly and affects many industry sectors, including concrete construction. The cost of corrosion of steel reinforcement within concrete is estimated at many billions of dollars worldwide. The corrosion of steel reinforcement represents a deterioration of the steel which in turn detrimentally affects its performance and therefore that of the concrete element within which it has been cast. A great amount of work has been undertaken over the years concerning the prevention of corrosion of steel, including the application of coatings, which has included the study of the process of corrosion itself, the properties of reinforcing steels and their resistance to corrosion as well as the design of structures and the construction process. The objective of fib Bulletin 49 is to provide readers with an appreciation of the principles of corrosion of reinforcing steel embedded in concrete and to describe the behaviour of particular steels and their coatings as used to combat the effects of such corrosion. These include galvanised reinforcement, epoxy coated reinforcement, and stainless reinforcing steel. It also provides information on the relative costs of the materials and products which it covers. It does not deal with structure design or the process of construction or with the post-construction phase of structure management including repair. It is hoped that it will nevertheless increase the understanding of readers in the process of corrosion of reinforcing steels and the ability of key materials and processes to reduce its harmful effects.
Author : John P. Broomfield
Publisher : CRC Press
ISBN 13 : 1482265494
Total Pages : 294 pages
Book Rating : 4.4/5 (822 download)
Download or read book Corrosion of Steel in Concrete written by John P. Broomfield and published by CRC Press. This book was released on 2003-07-09 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of Steel in Concrete provides information on corrosion of steel in atmospherically exposed concrete structures and serves as a guide for those designing, constructing and maintaining buildings, bridges and all reinforced concrete structures.This new edition incorporates the new European standards as well as USA and other international sta
Author : J.P. Broomfield
Publisher : CRC Press
ISBN 13 : 0203475283
Total Pages : 263 pages
Book Rating : 4.2/5 (34 download)
Download or read book Corrosion of Steel in Concrete written by J.P. Broomfield and published by CRC Press. This book was released on 1996-12-12 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: The corrosion of reinforcing steel in concrete is a major problem facing civil engineers and surveyors throughout the world today. There will always be a need to build stuctures in corrosive environments and it is therefore essential to address the problems that result. Corrosion of Steel in Concrete provides information on corrosion of steel in at
