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Showing 1 to 20 of 35 for “"Chloride Content"”.
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Rapid analysis of chloride content of contaminated concrete
… as the best field method available to assess the chloride content of powdered concrete samples. Since the initial investigation, the manufacturer of the packaged device has altered the product. The alterations presented a equipment difference, as well as an increase in cost. To eliminate the …
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The Chloride Content of Run-off Water Due to Street Deicing
[iii], 41 leaves. Advisor: F. Emmitt Jakob
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Electrical Properties and the Sodium, Potassium, and Chloride Content of Intestinal Smooth Muscle Cells
Made available in DSpace on 2014-12-05T22:14:39Z (GMT). No. of bitstreams: 1 5900469.pdf: 4006299 bytes, checksum: 5200802e70074f1d4c614d25da06996e (MD5) Previous issue date: 1958
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The development of a field procedure for determining the chloride content of concrete and an analysis in the variability of the effective diffusion constant
… remaining methods selected. Effects of cement content and reaction temperature on the results obtained for the specific ion probe were also investigated. Results of the tests for the effects of cement content were somewhat inconclusive, but indicated more variability in the results as the …
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Refinement of air-borne chloride exposure classes for RC structures in the Cape Peninsula
… study measured the concentration of airborne chlorides of select locations in the Cape Peninsula area, using the wet candle device. Five monitoring stations were exposed around the Cape Peninsula area at varying distances of 50 m, 150 m, 250 m, 2.7 km and 13.5 km from the coastline. Samples …
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Effect of Admixtures, Chlorides, and Moisture on Dielectric Properties of Portland Cement Concrete in the Low Microwave Frequency Range
… superplasticizer, and shrinkage admixture), and chloride content on the dielectric properties of PCC. Measurements were conducted in the time domain and converted to the frequency domain using Fast Fourier Transform. The research found that an increase in the moisture content of PCC resulted in …
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Evaluation of Chloride Diffusion in Concrete Using Bulk Diffusion Test and Scanning Electron Microscopy
… concern impacting the durability of concrete is chloride penetration in aggressive environments such as marine or coastal areas. In such environments, chloride ions can penetrate into the pores of concrete leading to the corrosion of embedded steel reinforcement which compromises the structural …
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Computational Simulation of Chloride-Induced Corrosion Damage in Prestressed Concrete Bridge Girders
… analytical tools for the accurate simulation of chloride ingress, corrosion and mechanical damage (cracking) in the concrete, and for the evaluation of the impact of corrosion on the flexural and shear strength of bridge girders. First, an efficient and accurate analytical scheme is formulated to …
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The collection of specimens of urine from infants, with observations on renal function in the first two weeks of life
… of the urine, as 'fell as it*'s urea and chloride content. In the appendix will be found the data concerning the urine which has been collected.
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Service Life Assessment of Harbor Structures - Case studies of chloride ingress into concrete and sheet piling corrosion rates
… of corrosion of the reinforcement due to chloride ingress. When the chlorides have passed through the concrete cover and reached the reinforcement, the passivating protection of the rebars is lost and the corrosion processes starts. When designing new concrete structures in marine …
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Modeling the Time-to Corrosion Cracking of the Cover Concrete in Chloride Contaminated Reinforced Concrete Structures
Significant factors on steel corrosion in chloride contaminated reinforced concrete and time-to-corrosion cracking were investigated in this study. Sixty specimens were designed with seven admixed chloride contents, three concrete cover depths, two reinforcing steel bar diameters, two exposure …
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Sensory and Chemical Characteristics of Eastern Oysters(Crassostrea virginica)
… attributes were measured, including glycogen content, proximate analysis, sodium chloride content, and fatty acid analysis. Statistical differences were found for the attributes: volume of liquor, gray/brown and tan colors, roundness of shell, plumpness and salty taste when comparing eastern …
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Effect of carbonation on bound chlorides in cementitious and alkali activated binders
… data indicates a mixed performance. <br/><br/>Chloride induced corrosion of reinforced concrete is one of the most common deterioration mechanisms that affect concrete structures exposed to marine or urban environments across the world. The chloride ions that enter concrete can be found either …
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Field Performance of Epoxy-Coated Reinforcing Steel in Virginia Bridge Decks
… and determination of carbonation depth, moisture content, absorption, percent saturation and chloride content at 13 mm depth. Rapid chloride permeability test was also performed for the surface and base concrete on samples obtained from cores containing truss bars. The ECR inspection consisted of …
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Determination of chloride diffusion constants for concretes of differing water to cement ratios and admixtures
Reinforced concrete exposed to chlorides is subject to rapid deterioration once the concentration of the chloride ion in the concrete reaches a critical level to cause corrosion of the reinforcing steel. The chloride ion diffuses through concrete according to Fick's Law, which is a function of …
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Design and Development of an In-situ Chloride Migration Test
The predominant mechanism of transport of chloride ions into concrete is diffusion. The rate of diffusion is largely controlled by the chloride diffusivity or chloride diffusion coefficient of the concrete. The determination of this parameter requires a long test duration and, hence, migration test …
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Effects of Mica On Soil Properties For Embankment Construction
… but the studies looking at the effects of mica content on the other soil properties has been centered mostly in Georgia.</p> <p> Borrow pits were sampled across the state, both with and without mica. The laboratory testing program included the following. Tests for physical properties include …
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Corrosion Protection Service Life of Epoxy Coated Reinforcing Steel in Virginia Bridge Decks
… severity of cracks. Correlation of cracks with chloride penetration was used to characterize the influence of cracking on deck deterioration. Cracks influence the rate of chloride penetration, but the frequency and width distributions of cracks indicate that cracks are not likely to shorten the …
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Evaluation of the effectiveness of deep polymer impregnation as a corrosion abatement technique for overlaid bridge decks
… there is a sufficiently high concentration of chloride ions at the top rebar mat. The principal source of chloride ions is from the deicing salts applied on the decks during winter. More than 9 million tons of deicing salts are consumed each year in the U.S.A. As corrosion products have a …
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Electrical resistivity and ground-penetrating radar as tools to characterize groundwater surface water interaction at Mirror Lake, NH
… of low resistivity. Low resistivity and higher chloride content were confirmed by laboratory analysis of pore fluid. The results of ground penetrating radar (GPR) surveys suggested that this technique can also identify geologic features that relate to seepage. GPR surveys identified the bounds …
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