prediction of long term chloride diffusion of concrete in

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Prediction of long term chloride diffusion of concrete in ...

01/05/2008  A long term prediction of the chloride diffusion was made to estimate the service life of structures. Experimental observations of s diffusion of NC correlated better with Fick’s Second Law prediction than those of HPC. Previous article in issue; Next article in issue; Keywords. Prediction model. Concrete durability. Chloride diffusion. Initial surface absorption test (ISAT) High

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Prediction of long term chloride diffusion of concrete in ...

Long-term meso-scopic numerical simulation for chloride transport is proposed. A simple empirical prediction model for long-term chloride diffusion is developed. C s and D change over time and ...

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Prediction model of long-term chloride diffusion into ...

20/01/2018  Mangat and Molloy predicted the long-term chloride diffusion in concrete on the basis of Fick’s second law by considering the time-dependency of the chloride diffusion coefficient, and the chloride profiles derived using this time-variation of chloride diffusion coefficient show good correlation with experimental data at the exposure times of 0.75, 2.8, 3.3, and 5 years.

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Prediction of Long Term Diffusion Behaviour of Chloride in ...

of extent of chloride ingression into already laid concrete and its consequences on the structure to be built. This study This study revealed that chloride content in the newly built concrete would be below the allowable limit of 0.6 kg/m (as per IS: 456-

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Prediction of long-term chloride diffusion in silica fume ...

01/05/2015  Recognition of chloride diffusion phenomenon in concrete and developing a prediction model that can estimate the service life of the concrete structures subject to long-term exposure is vital for aggressive marine environments. The present study focuses on developing such a prediction model of chloride diffusion coefficient for silica fume concrete under long-term exposure to a durability site ...

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Prediction of long term chloride concentration in concrete ...

The paper presents a wide range of experimental data of the authors and of other researchers on acid-soluble chloride diffusion in different mixes of concrete, and shows conclusively that the chloride diffusion coefficient D c is strongly dependent on the period of exposure of concrete to a chloride environment. Consequently, long term prediction of chloride concentrations on the basis of Fick ...

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Prediction model of long-term chloride diffusion into ...

Prediction model of long-term chloride diffusion into plain concrete considering the effect of the heterogeneity of materials exposed to marine tidal zone

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Prediction of Long-Term Chloride Diffusion in Silica Fume ...

Recognition of chloride diffusion phenomenon in concrete and developing a prediction model that can estimate the service life of the concrete structures subject to long-term exposure is vital for ...

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Prediction model of long-term chloride diffusion into ...

Abstract Long-term chloride-induced corrosion of steel reinforcement would make concrete structures vulnerable to deterioration and as a result shorten their service life. However, physical experiment of in-situ or laboratory may not be an effective way to determine long-term chloride profiles and diffusion behaviors into concrete attributed to its time-consuming and implementary difficulty.

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Microstructure, Microchemistry, and Prediction of Long ...

Microstructure, Microchemistry, and Prediction of Long-Term Diffusion Behavior of Chloride in Concrete T. Karthikeyan, Arup Dasgupta, P. Magudapathy, S. Saroja, M ...

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Prediction of long term chloride diffusion of concrete in ...

The results collected within 21 months period allowed the prediction of chloride diffusion with time for NC. A long term prediction of the chloride diffusion was made to estimate the service life of structures. Experimental observations of s diffusion of NC correlated better with Fick’s Second Law prediction than those of HPC.

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Prediction of Long Term Diffusion Behaviour of Chloride in ...

of extent of chloride ingression into already laid concrete and its consequences on the structure to be built. This study This study revealed that chloride content in the newly built concrete would be below the allowable limit of 0.6 kg/m (as per IS: 456-

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Prediction of long term chloride diffusion of concrete in ...

Prediction of long term chloride diffusion of concrete in harsh environment. A harsh environment of temperature (20–54 °C [68–129 °F]) and humidity (80–95%) with the presence of chloride and sulfate make concrete structures vulnerable to deterioration and as a result shorten their service life span. This research has evaluated the durability of normal concrete (NC) and high performance ...

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Prediction of Long-Term Chloride Diffusion in Silica Fume ...

Recognition of chloride diffusion phenomenon in concrete and developing a prediction model that can estimate the service life of the concrete structures subject to long-term exposure is vital for ...

Get Price

Prediction model of long-term chloride diffusion into ...

Abstract Long-term chloride-induced corrosion of steel reinforcement would make concrete structures vulnerable to deterioration and as a result shorten their service life. However, physical experiment of in-situ or laboratory may not be an effective way to determine long-term chloride profiles and diffusion behaviors into concrete attributed to its time-consuming and implementary difficulty.

Get Price

Prediction of long-term chloride concentration in concrete ...

The paper presents a wide range of experimental data of the authors and of other researchers on acid-soluble chloride diffusion in different mixes of concrete, and shows conclusively that the chloride diffusion coefficient D(c) is strongly dependent on the period of exposure of concrete to a chloride environment. Consequently, long term prediction of chloride concentrations on the basis of ...

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Microstructure, microchemistry, and prediction of long ...

The faster diffusion of chloride in seawater-cured concrete can be attributed to the availability of water medium in wet concrete, in the initial stages of the hydration of cement. The prediction of the concentration profile of chloride in a layer of 100 mm of 28% fly ash containing concrete over concrete exposed to seawater is carried out. For ...

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Prediction of long-term chloride concentration in concrete ...

The paper presents a wide range of experimental data of the authors and of other researchers on acid-soluble chloride diffusion in different mixes of concrete, and shows conclusively that the chloride diffusion coefficient D(c) is strongly dependent on the period of exposure of concrete to a chloride environment. Consequently, long term prediction of chloride concentrations on the basis of ...

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[PDF] Prediction of long term chloride concentration in ...

The paper presents a wide range of experimental data of the authors and of other researchers on acid-soluble chloride diffusion in different mixes of concrete, and shows conclusively that the chloride diffusion coefficient Dc is strongly dependent on the period of exposure of concrete to a chloride environment. Consequently, long term prediction of chloride concentrations on the basis of Fick ...

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Prediction of Long Term Diffusion Behaviour of Chloride in ...

concrete structure above after long years of service.a time at the surface of PCC b depth after service life of. 150 years.

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Prediction of Long Term Diffusion Behaviour of Chloride in ...

of extent of chloride ingression into already laid concrete and its consequences on the structure to be built. This study This study revealed that chloride content in the newly built concrete would be below the allowable limit of 0.6 kg/m (as per IS: 456-

Get Price

Prediction of long term chloride diffusion of concrete in ...

Prediction of long term chloride diffusion of concrete in harsh environment. A harsh environment of temperature (20–54 °C [68–129 °F]) and humidity (80–95%) with the presence of chloride and sulfate make concrete structures vulnerable to deterioration and as a result shorten their service life span. This research has evaluated the durability of normal concrete (NC) and high performance ...

Get Price

Prediction of long-term chloride concentration in concrete ...

The paper presents a wide range of experimental data of the authors and of other researchers on acid-soluble chloride diffusion in different mixes of concrete, and shows conclusively that the chloride diffusion coefficient D(c) is strongly dependent on the period of exposure of concrete to a chloride environment. Consequently, long term prediction of chloride concentrations on the basis of ...

Get Price

Prediction of long-term chloride concentration in concrete ...

The paper presents a wide range of experimental data of the authors and of other researchers on acid-soluble chloride diffusion in different mixes of concrete, and shows conclusively that the chloride diffusion coefficient D(c) is strongly dependent on the period of exposure of concrete to a chloride environment. Consequently, long term prediction of chloride concentrations on the basis of ...

Get Price

Prediction of long term chloride concentration in concrete

The paper presents a wide range of experimental data of the authors and of other researchers on acid-soluble chloride diffusion in different mixes of concrete, and shows conclusively that the chloride diffusion coefficient Dc is strongly dependent on the period of exposure of concrete to a chloride environment. Consequently, long term prediction of chloride concentrations on the basis of Fick ...

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Prediction of Chloride Diffusion in Concrete Structure ...

The rate of chloride diffusion in an actual reinforced concrete structure is very slow, and thus measuring long term diffusion is a slow, time-consuming process. In addition, few research studies have dealt with chloride diffusion over long periods. In this section, a concrete plate of 0.15 m × 0.15 m was used as an example, as shown as Figure

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Prediction of Long Term Diffusion Behaviour of Chloride in ...

concrete structure above after long years of service.a time at the surface of PCC b depth after service life of. 150 years.

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A Prediction Method for Long-term Chloride Concentration ...

01/11/1997  A method to predict long-term chloride concentration profiles in 100 percent ordinary portland cement (OPC) paste, mortar, and concrete with water-cement ratios in the range of a 0.4 to 0.6 is presented. This approach of using the semi-empirical models enables an engineer who performs core sampling to predict the future chloride concentration profile of concrete structures in the submerged ...

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Long-Term Chloride Penetration Resistance of Bridge Decks ...

Long-Term Chloride Penetration Resistance of Bridge Decks Made With Silica Fume Concretes R.D. Hooton1, E ... Bulk chloride diffusion results are shown in Table 3. Table 2. ASTM C1202 Resistance to Chloride Ion Penetration Results Project Avg. C1202 Chloride Ion (coulombs) Code Penetrability Bridge #161-0151 DOT 690 Very Low Overlay, I-90 over Kraft Road KR 2360 Moderate Rt. 78 Class HP 78

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Chloride penetration into concrete in marine environment ...

This effect has serious implications for long term predictions of chloride penetration, ... Salta, M. M., ‘Influence of fly ash on chloride diffusion in concrete’, in ‘Corrosion and Corrosion Protection of Steel in Concrete’, Proceedings of an International Conference, University of Sheffield, England, Jul. 1994, 794–805. [29] Gjorv, O. E., Tan, K. and Zhang, M. H., ‘Diffusity of ...

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