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Effect Of Salt Additives On Rebar Corrosion
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Book Synopsis Effect of Salt Additives on Rebar Corrosion by : Ji-Won Jang
Download or read book Effect of Salt Additives on Rebar Corrosion written by Ji-Won Jang and published by . This book was released on 1993 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Salt Additives on Rebar Corrosion by : Ji-Won Jang
Download or read book Effect of Salt Additives on Rebar Corrosion written by Ji-Won Jang and published by . This book was released on 1990 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Salt Additives on Rebar Corrosion by : Ji-Won Jang
Download or read book Effect of Salt Additives on Rebar Corrosion written by Ji-Won Jang and published by . This book was released on 1992 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Concrete Under Severe Conditions 2 by : Odd E. Gjørv
Download or read book Concrete Under Severe Conditions 2 written by Odd E. Gjørv and published by CRC Press. This book was released on 1998 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of De-icing Salts on the Chemistry of the Pore Solution in Cement Pastes and Their Influence on Rebar Corrosion by : Leah Kristufek
Download or read book The Effect of De-icing Salts on the Chemistry of the Pore Solution in Cement Pastes and Their Influence on Rebar Corrosion written by Leah Kristufek and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Anti-icing and de-icing salts are an important tool used to increase traction and prevent the formation of black ice. Municipalities may choose to use any of a variety of salts including NaCl, CaCl2 and MgCl2. While all salts depress the freezing point of water, CaCl2 and MgCl2 are effective at lower temperatures making their use more common in Northern Ontario. The use of de-icing and anti-icing salts results in greater traction for vehicles and pedestrians while resulting in increased aesthetics when salt rather than sand is used. These benefits have prompted more northern Canadian municipalities to try using CaCl2 and MgCl2 salts when previously sand and gravel have been used. Current research into the effects of road salts on rebar corrosion and concrete focuses mainly on the effects of NaCl salts despite some researchers indicating that CaCl2 and MgCl2 impact concrete and rebar corrosion differently. It is of interest to better understand the hydration products formed in cement exposed to the different salt types since damage to cements can reduce the effective concrete cover depth over rebar. In this research pore solution expression has been used to investigate how different amounts of admixed NaCl, CaCl2 and MgCl2 impact the composition of pore solution from general use Portland cement and by extension the composition of the solid hydration products. These tests indicate that expressed pore solution from cement paste with admixed NaCl contained significantly more sulphate and chloride than pore solution from pastes which contained CaCl2 or MgCl2. The pH of pore solutions from pastes containing CaCl2 or MgCl2 also decreased significantly compared to pastes with an equivalent amount of NaCl. Using the expressed pore solution information about changes in the elemental composition synthetic pore solutions can be designed which closer mimic cement exposed to these salts. In this research synthetic pore solutions were prepared from laboratory grade NaOH, KOH, Ca(OH)2 and CaSO4 as well as admixed NaCl, CaCl2 or MgCl2 to investigate rebar corrosion using electrochemical testing techniques. In addition to synthetic pore solutions replicating the pore solution in pastes containing the three salts other synthetic pore solutions from literature were chosen representing varying elemental compositions and pH values between 12.6 and 13.8. The environment inside cement without salt is protective for reinforcing bars. The pH of expressed pore solution without admixed salts was found to be approximately 13.3.
Book Synopsis Effect of Corrosion Inhibited Deicing Salts on Rebar Corrosion Measured by Galvanic Current Measurements by : Ji-Won Jang
Download or read book Effect of Corrosion Inhibited Deicing Salts on Rebar Corrosion Measured by Galvanic Current Measurements written by Ji-Won Jang and published by . This book was released on 1993 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Corrosion Effect of Stray Currents and the Techniques for Evaluating Corrosion of Rebars in Concrete by : Victor Chaker
Download or read book Corrosion Effect of Stray Currents and the Techniques for Evaluating Corrosion of Rebars in Concrete written by Victor Chaker and published by ASTM International. This book was released on 1986 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis THE EFFECT OF SALT IN CONCRETE ON COMPRESSIVE STRENGTH, WATER VAPOR TRANSMISSION, AND CORROSION OF REINFORCING STEEL. by :
Download or read book THE EFFECT OF SALT IN CONCRETE ON COMPRESSIVE STRENGTH, WATER VAPOR TRANSMISSION, AND CORROSION OF REINFORCING STEEL. written by and published by . This book was released on 1964 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the investigation was to determine the effects of sodium chloride and sea-water salts separately in concrete. The investigation covered the effects of salt on the compressive strength and water vapor transmission (WVT) of concrete, as well as the corrosive effects of salt on mild reinforcing steel. Variables included water-cement ratio, salinity of mixing water, and diameter and thickness of the specimens. The test environments included 20, 50, and 75 percent RH at 73.4 F. The data presented herein support the general conclusion stated in a previous report, namely, that at a mixingwater salinity of approximately 25 grams of salt per kilogram of solution, compressive strength is increased, WVT is minimized, and corrosion of mild steel is not significant.
Book Synopsis Maintenance of the Highway Infrastructure by : National Research Council (U.S.). Transportation Research Board
Download or read book Maintenance of the Highway Infrastructure written by National Research Council (U.S.). Transportation Research Board and published by . This book was released on 1994 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Deicing Salt Corrosion with and Without Inhibitors by : Mark Callahan
Download or read book Deicing Salt Corrosion with and Without Inhibitors written by Mark Callahan and published by . This book was released on 1988 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chloride ion penetration through concrete to reinforcing steel is causing the premature deterioration of numerous bridge decks in Iowa. The purpose of this research was to determine if any of several additives/alternative deicing chemicals could inhibit corrosion of reinforcing steel. The deicers tested were calcium magnesium acetate (CMA), CMA+NaCl, Quicksalt+PCI and CG-90, a polyphosphate solution being developed by Cargill. Two tests were established. First, steel coupons were placed in a 15% solution of a deicer and distilled water to determine which alternative deicer would cause the least amount of corrosion in a solution. The coupons were weighed periodically to determine each coupon's weight loss due to corrosion. The second test involved ponding a 15% solution of each material on reinforced concrete blocks. Weekly copper-copper sulfate electrical half cell (CSE) potential readings were taken on each block to determine if corrosive activity was occurring at the steel surface. When the ponding research was concluded, concrete samples were taken from one of the three blocks ponded with each deicer. The samples were used to determine the chloride ion content at the level of the steel. Results show all the deicers were less corrosive than NaCl. However, only pure CMA significantly inhibited the corrosion of steel imbedded in concrete.
Book Synopsis Time-to-corrosion of Reinforcing Steel in Concrete Slabs: Effect of mix design and construction parameters by :
Download or read book Time-to-corrosion of Reinforcing Steel in Concrete Slabs: Effect of mix design and construction parameters written by and published by . This book was released on 1973 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Evaluation of New Inhibitors for Rebar Corrosion in Concrete by : Brian D. Chambers
Download or read book An Evaluation of New Inhibitors for Rebar Corrosion in Concrete written by Brian D. Chambers and published by . This book was released on 2003 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The corrosion of reinforcing steel in concrete is estimated to affect more than 50% of the 575,000 bridges in the United States. One approach to mitigating this problem is to use corrosion-inhibitive compounds admixed into the concrete paste. This study sought to examine the corrosion inhibition performance of a series of compounds admixed into high-quality concrete and to delineate the effects of these compounds on the concrete with regard to the corrosion process. A series of eight compounds were admixed into Type A4 concrete. The compounds tested were aminoethylethanolamine, aminothiophenol, di-sodium Beta-glycerophosphate, calcium nitrite, di-n-butyl sulfoxide, lithium nitrate, sodium metasilicate, and nitrilotriphosphonic acid. Concrete blocks were cast, into which were placed 0.009-in.-diameter 1040 steel wires. The corrosion rate was assessed via a resistance change measurement (RCM) of these wires over time using a temperature-corrected four-point resistance measurement. The time-to-open circuit for the wires was also monitored. RCM was compared to (1) electrochemical impedance spectroscopy results of tests conducted in a simulated pore solution, and (2) chloride permeability measurements of the concrete as per ASTM C 1202. The effect of the admixtures on the compressive strength and density of the concrete was also assessed. RCM and time-to-open circuit results showed that four test inhibitors had equal or better corrosion prevention at 2 years of testing compared to a widely used commercial mix (DCI). These test inhibitors included di-sodium Beta-glycerophosphate (0.283 mol/cu ft and 0.815 mol/cu ft), aminoethylethanolamine (0.815 mol/cu ft), lithium nitrate (0.815 mol/cu ft), and sodium metasilicate (0.815 mol/cu ft). After 100 weeks, 33% to 44% of the wires were active in concrete admixed with these test compounds, whereas only 25% of the wires were active in concrete admixed with DCI. This research has also shown that the performance of a corrosion inhibitor in high-quality concrete is a function of numerous interrelated factors that are not predicted from any single laboratory test. These tests provide promising results for alternative inhibitive admixtures for standard Type A4 concrete. It is recommended that additional tests be conducted on concrete mixtures containing slag and fly ash using multiple concentrations of the four most promising inhibitors. Further testing may lead to the implementation of a better corrosion-inhibiting admixture, thus increasing the service life of bridges.
Author :United States. Federal Highway Administration. Offices of Research and Development Publisher : ISBN 13 : Total Pages :112 pages Book Rating :4.3/5 (91 download)
Book Synopsis Report No. FHWA-RD. by : United States. Federal Highway Administration. Offices of Research and Development
Download or read book Report No. FHWA-RD. written by United States. Federal Highway Administration. Offices of Research and Development and published by . This book was released on 1973 with total page 112 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 1994 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Temperature and Salt Contamination on Corrosion of Reinforcing Steel in OPC and Blended Cement Concretes by : C. N. Sadath Ali Khan
Download or read book The Effect of Temperature and Salt Contamination on Corrosion of Reinforcing Steel in OPC and Blended Cement Concretes written by C. N. Sadath Ali Khan and published by . This book was released on 1993 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Corrosion of Reinforcing Steel in Concrete by : J. Tonini
Download or read book Corrosion of Reinforcing Steel in Concrete written by J. Tonini and published by ASTM International. This book was released on 1980 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Time-to-corrosion of reinforcing steel in concrete slabs by : Kenneth C. Clear
Download or read book Time-to-corrosion of reinforcing steel in concrete slabs written by Kenneth C. Clear and published by . This book was released on 1976 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: