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chloride permeabilities of rigid concrete bridge deck

chloride permeabilities of rigid concrete bridge deck

Chloride Permeabilities of Rigid Concrete Bridge Deck Overlays

Chloride Permeabilities of Rigid Concrete Bridge Deck Overlays D. WHITING AND w. DZIEDZIC A study of the chloride permeability of rigid concrete bridge deck overlays was conducted during the 1987 construction season. A total of thirteen latex-modified concrete (LMC) overlays, ten

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CHLORIDE PERMEABILITIES OF RIGID CONCRETE BRIDGE DECK

chloride permeabilities of rigid concrete bridge deck overlays A study of the chloride permeability of rigid concrete bridge deck overlays was conducted during the 1987 construction season. A total of thirteen latex-modified concrete (LMC) overlays, ten superplasticized dense concrete (SDC) overlays, and two condensed silica fume concrete (CSFC) overlays, were investigated.

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CHLORIDE PERMEABILITIES OF RIGID CONCRETE BRIDGE DECK ...

A study of the chloride permeability of rigid concrete bridge deck overlays was conducted during the 1987 construction season. A total of thirteen latex-modified concrete (LMC) overlays, ten superplasticized dense concrete (SDC) overlays, and two condensed silica fume concrete (CSFC) overlays, were investigated. Concretes were tested both by the rapid chloride permeability test and

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Chloride Permeabilities of Rigid Concrete Bridge Deck Overlays

A study of the chloride permeability of rigid concrete bridge deck overlays was conducted during the 1987 construction season. A total of thirteen latex-modified concrete (LMC) overlays, ten superplasticized dense concrete (SDC) overlays, and two condensed silica fume concrete (CSFC) overlays, were investigated.

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Chloride-induced corrosion of reinforced concrete bridge decks

01-01-2002  In concrete bridge decks, chloride ions are derived mainly from deicing salts used during winter maintenance operations and from exposure to sea water. The chlorides in the salt penetrate the concrete and, when they reach a critical concentration, they break the passive film surrounding the reinforcing steel, and corrosion is initiated. In this ...

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Surface Chloride Levels in Colorado Structural Concrete

chloride concentrations of most bridge decks were below the critical values at the rebar level. The chloride concentrations of bridge decks are usually greater than that of bridge curbs. However, these bridge curbs showed deeper chloride penetration than the bridge decks. Younger bridges had much lower chloride concentrations, which is expected.

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Electrochemical Removal of Chlorides From Concrete Bridge ...

Concrete Bridge Decks John E. Slater and David R. Lankard, Battelle Columbus Laboratories Peter J. Moreland,* ICI Ltd., Runcorn, England The spalling of concrete bridge decks is largely due to corrosion of the top layer of reinforcing steel. This corrosion is induced by chloride ions,

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Development of a Chloride Concentration Sampling Protocol ...

chloride concentration of a given bridge deck. This research will be helpful in effectively assessing the condition of concrete bridge decks with respect to chloride-induced corrosion of the reinforcing steel and prioritizing bridge maintenance and rehabilitation projects.

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Testing and Evaluation of Existing Bridge Decks for ...

17-01-2018  • Deck is above chloride threshold to about 0.75” below the surface. • The rebar was not placed with 1.5” of cover in many locations and rutting has further reduced cover. • Any rebar within 0.75” of the surface likely has corrosion initiated. Youngs Bay Bridge #08306 Chloride Tests . 28 0 0.02. 0.04. 0.06. 0.08. 0.1. 0.12

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Low Porosity, High Strength Concrete for Bridge Decks

to corrosion of the steel in the upper mat of concrete bridge decks; and more specifically to corrosion induced by chloride ions penetrating from the surface of the bridge deck. The chloride is derived from de-icing salt (usually sodium chloride but occasionally calcium chloride) applied to keep the bridge deck clear during winter snows.

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Chloride ion penetration in bridge deck concrete — Texas ...

Seven concrete mixtures typically used in Texas bridge decks were evaluated for chloride permeability using the ponding test. The primary experimental variables were the curing duration, type and percentage of supplemental cementitious materials, type of coarse aggregate, duration of ponding, and the surface preparation of ponded concrete specimens.

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Effect of Wet-Mat Curing Time on Chloride Permeability of ...

Effect of Wet-Mat Curing Time on Chloride Permeability of Concrete Bridge Decks Hassan Ghanem(), Ayman Trad, Mohamed Dandachy, and Adel ElKordi Department of Civil Engineering, Beirut Arab ...

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Chloride-Induced Corrosion Deterioration of Bridge Deck ...

Request PDF Chloride-Induced Corrosion Deterioration of Bridge Deck with Latex-Modified Conrete Overlay Overlaying an existing bridge deck with a low-permeability concrete layer would ideally ...

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ELECTROCHEMICAL REMOVAL OF CHLORIDES FROM CONCRETE BRIDGE ...

A field trial on a 3 by 6.1-m (10 by 20-ft) section of chloride-contaminated bridge deck was conducted in which laboratory-optimized parameters were used. Under the best conditions, 90 percent of the chloride was removed from the concrete above the rebar; 88 percent was removed from the concrete immediately adjacent to the rebar.

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Reinforced Concrete Bridge Deck Model Considering Delayed ...

of concrete ability to resist chloride ingress via electri-cal conductivity and resistivity [17]. The ability of con-crete to resist chloride ingress may be computed next [18] as shown for the studied mixtures in [19]. Moreover, for the ideal bridge deck, the effect of chloride penetration into various High Performance Concrete mixtures (HPC)

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Low Porosity, High Strength Concrete for Bridge Decks

to corrosion of the steel in the upper mat of concrete bridge decks; and more specifically to corrosion induced by chloride ions penetrating from the surface of the bridge deck. The chloride is derived from de-icing salt (usually sodium chloride but occasionally calcium chloride) applied to keep the bridge deck clear during winter snows.

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CHAPTER FOUR - BRIDGE DECK PROTECTIVE SYSTEMS Concrete ...

14-07-2021  Silica Fume Concrete Overlays Three silica fume concrete overlays were placed on bridge decks in Virginia between 1987 and 1991 to evaluate the properties of silica fume concrete overlays and to deter- mine the minimum amount of silica fume needed to reduce the permeability of the decks to chloride ion penetration (Ozyildirim 1992).

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Bridge Decks - an overview ScienceDirect Topics

Weiwei Lin, Teruhiko Yoda, in Bridge Engineering, 2017. 5.5 Waterproofing System. Bridge decks are vulnerable, subject to attack by water and chloride that can lead to deterioration and issues with longevity and durability of the bridge decks. The installation of an effective waterproofing membrane is therefore an essential part of bridge deck system in addition to the drainage system.

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Effects of Rigid Overlays on Corrosion Currents of ...

Effects of Rigid Overlays on Corrosion Currents of Reinforcing Steel in Bridge Decks DAVID WHITING Corrosion currents of reinforcing steel in bridge decks scheduled for rehabilitation with rigid concrete overlay systems were mea­ sured using a three-electrode linear polarization (3LP) device. Ten bridge decks in Ohio were included in the study.

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Effects of Sawed-Groove Texturing on Concrete Bridge Decks

Rigid Pavement Construction. Effects of Sawed-Groove Texturing on Concrete Bridge Decks JOHN E. GRADY ABSTRACT The experimental application of a sawed­ groove texture on two New York bridge decks and one operational use of diamond grinding to rectify an aggravated friction problem on a third deck are discussed.

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Chloride ion penetration in bridge deck concrete — Texas ...

Seven concrete mixtures typically used in Texas bridge decks were evaluated for chloride permeability using the ponding test. The primary experimental variables were the curing duration, type and percentage of supplemental cementitious materials, type of coarse aggregate, duration of ponding, and the surface preparation of ponded concrete specimens.

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Effect of Wet-Mat Curing Time on Chloride Permeability of ...

24-11-2018  This study presents findings related to chloride permeability of several widely used Texas Department of Transportation bridge deck concrete mixtures. The rapid chloride

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Effect of Wet-Mat Curing Time on Chloride Permeability of ...

Beirut Arab University, a leading higher education institution, is devoted to achieve excellence in teaching, research, and services through advancing knowledge and addressing the needs of the society.

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ELECTROCHEMICAL REMOVAL OF CHLORIDES FROM CONCRETE BRIDGE ...

A field trial on a 3 by 6.1-m (10 by 20-ft) section of chloride-contaminated bridge deck was conducted in which laboratory-optimized parameters were used. Under the best conditions, 90 percent of the chloride was removed from the concrete above the rebar; 88 percent was removed from the concrete immediately adjacent to the rebar.

get price

Reinforced Concrete Bridge Deck Model Considering Delayed ...

of concrete ability to resist chloride ingress via electri-cal conductivity and resistivity [17]. The ability of con-crete to resist chloride ingress may be computed next [18] as shown for the studied mixtures in [19]. Moreover, for the ideal bridge deck, the effect of chloride penetration into various High Performance Concrete mixtures (HPC)

get price

CHAPTER FOUR - BRIDGE DECK PROTECTIVE SYSTEMS Concrete ...

14-07-2021  Silica Fume Concrete Overlays Three silica fume concrete overlays were placed on bridge decks in Virginia between 1987 and 1991 to evaluate the properties of silica fume concrete overlays and to deter- mine the minimum amount of silica fume needed to reduce the permeability of the decks to chloride ion penetration (Ozyildirim 1992).

get price

Effect of Cracking on Chloride Content in Concrete Bridge ...

The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design ...

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STATE OF CALIFORNIA DEPARTMENT OF TRANSPORTATION

critical chloride concentration to be reached, so many tests may be required. Hence, one would like to test often, but inexpensively. Bridge-deck concrete OUR SOLUTION. The Smart Pebble™ concept is illustrated in Fig. S-1. The reader can be either hand-held or vehicle-mounted. For now, the Smart Pebbles™ are envisioned as being inserted in ...

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Sika Solutions for the Refurbishment of Concrete Bridges

concrete repair and protection, structural deck waterproofing, structural strengthening, steel corrosion protection, watertight joint sealing, high performance grouting and structural bonding solutions (rigid and elastic). Sika’s depth of expertise comes from a world wide experience in bridge

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Bridge deck cracking: A field study on concrete placement ...

01-09-2012  The concrete mixture proportions for the five bridge decks are shown below in Table 1.As previously stated, AHTD requires a maximum w/cm of 0.44, a total cementitious material content of 362 kg/m 3 (611 lbs/yd 3), and an air content of 6 ± 2% for bridge deck concrete. All contractors chose to use the least amount of cementitious material required (362 kg/m 3) and three contractors chose to ...

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