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Showing 1 to 20 of 45 for “"concrete bridge decks"”.
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GPR data processing for reinforced concrete bridge decks
… several aspects of GPR data processing for RC bridge decks are studied. First, autofocusing techniques are proposed to replace the previous expensive and unreliable human visual inspections during the iterative migration process for the estimation of the velocity/dielectric permittivity …
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Crack detection technique for reinforced concrete bridge decks
… instrumentation and test results of a reinforced concrete bridge deck constructed on 3-span continuous steel girders. The instrumented bridge is located in Evansville, West Virginia at the intersection of US Route 50 East and WV 92 South. An instrumentation system is developed and implemented …
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Condition Analysis of Concrete Bridge Decks in Utah
Concrete bridge decks in Utah are experiencing observable deterioration due primarily to freeze-thaw cycles and the routine application of deicing salts during winter maintenance activities. Given the need for increasingly cost-effective strategies for bridge deck maintenance, rehabilitation, and …
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Automated detection of wave velocities in concrete bridge decks
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.
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Automatic delamination detection of concrete bridge decks using acoustic signatures
Thesis (Ph. D.)--Michigan State University. Department of Civil Engineering, 2010
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Effect of Stress on Freeze-Thaw Durability of Concrete Bridge Decks
Made available in DSpace on 2014-12-10T17:25:46Z (GMT). No. of bitstreams: 1 6910650.pdf: 6703096 bytes, checksum: 3dcb99491935ccf2e581b3f4a29047e9 (MD5) Previous issue date: 1968
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A study of fiberglass-reinforced plastic for reinforcing concrete bridge decks
Deterioration of reinforced concrete bridge decks has gained widespread public attention and concern in recent years. Much of the damage can be attributed to corrosion of steel reinforcing bars. Numerous solutions have been suggested, one of which is the replacement of steel with a non-corroding …
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Integrity and effectiveness of standard preformed membranes placed on concrete bridge decks
Waterproofing membranes have been used on bridge decks for almost three decades in order to prevent chloride ingress into concrete. However, the performance of these membranes have yet to be adequately evaluated. Therefore, this research was carried out primarily to evaluate the integrity and …
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Sensitivity of Half-Cell Potential Measurements to Properties of Concrete Bridge Decks
… the corrosion potential of reinforcing steel in concrete bridge decks. The technique is particularly useful because it can be utilized to evaluate the probability of corrosion before damage is evident at the surface of a bridge deck. The specific objective of this research was to quantify the …
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Service life determination of concrete bridge decks and bridge deck overlay systems
… in the United States, specifically reinforced concrete bridges, is deteriorating at a rapid rate. It is known that chloride-induced corrosion of the reinforcing steel is one of the major causes of the deterioration of concrete bridge decks. Numerous bridge deck protection and overlay systems …
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Corrosion Testing and Modeling of Chloride-Induced Corrosion Deterioration of Concrete Bridge Decks
Modeling of chloride-induced deterioration of bridge decks by using Fick's Second Law of diffusion was performed. The objective of this study is to select suitable input parameters for the model to estimate the service life of bridge decks. Five bridge decks, one in each of the following states, …
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Effect of Initial Surface Treatment Timing on Chloride Concentrations in Concrete Bridge Decks
<p>Bridge engineers and managers in coastal areas and cold regions frequently specify the application of surface treatments on concrete bridge decks as barriers against chloride ingress. In consideration of concrete cover thickness and the presence of stay-in-place metal forms (SIPMFs), the …
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Effect of Stay-in-Place Metal Forms on Performance of Concrete Bridge Decks
… metal forms (SIPMFs) on the performance of concrete bridge decks in Utah. The research program included six bridge decks with SIPMFs and six decks without SIPMFs, which were all located within the Interstate 215 corridor in the vicinity of Salt Lake City, Utah, and therefore subject to …
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In-situ assessment of concrete bridge decks and pavements using stress-wave based methods
<p>"Concrete infrastructure of United States is aging and deteriorating. Accurate assessment the condition of concrete infrastructure is critical for its maintenance and rehabilitation. Stress-wave based methods, including ultrasonic surface wave (USW) and impact echo (IE), are becoming popular for …
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A Load-Deflection Study of Fiber-Reinforced Plastics as Reinforcement in Concrete Bridge Decks
Approximately fifty percent of the bridges in the United States are considered deficient. The deterioration of the concrete components is a leading cause of the problem. The deterioration of concrete bridge decks is due primarily to corrosion of the reinforcing steel in the concrete. A promising …
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Shear Strength and Strength Degradation of Concrete Bridge Decks with GFRP Top Mat Reinforcement
… was to investigate the shear strength of concrete bridge decks with GFRP top-mat reinforcement. Several models currently exist to predict the shear strength during the design process; however, previous research at Virginia Tech indicates that the existing equations are overly conservative. …
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Nondestructive testing of concrete bridge decks using ground-penetrating radar and the chain drag method
… nondestructive techniques that are used for bridge deck analysis: the chain drag method and ground penetrating radar (GPR). The chain drag testing was performed in the laboratory with 23 simulated concrete bridge deck specimens. The specimens contained varying internal conditions such as …
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Preliminary investigation of the systematic approach to the repair versus replacement decision-making process for deteriorated concrete bridge decks
Thesis (Civ. E.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1986.
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