accelerated simulation of chloride ingress into concrete

Accelerated simulation of chloride ingress into concrete ...

Sep 15, 2015  Based on the comparison of the chloride ingress into concrete under natural environment, the numerical simulation results show that the acceleration factor can be accelerated to 22 times by the artificial simulated environment test. The second example is Hangzhou Bay Bridge in Hangzhou, China. Ref.

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Accelerated simulation of chloride ingress into concrete ...

Under natural and artificial simulated environments, the differences of chloride ingress into concrete are in terms of surface chloride content, convective zone depth, and diffusion coefficient. Numerical simulation indicates that the acceleration factor can be considered as a key parameter to determine the correlation of chloride ingress into ...

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Numerical simulation of chloride penetration in concrete ...

Oct 01, 2015  Numerical simulation of chloride penetration in concrete in rapid chloride migration tests. ... Concrete, Hardened: Accelerated Chloride Penetration, Nordtest Method (1995) Helsinfors. Google Scholar. ... Mathematical Modelling of Chloride Ingress into Concrete and Electro-chemical Chloride Removal from Concrete.

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Modelling of chloride ingress into concrete from a saline ...

Dec 01, 2005  A mathematical model previously developed for the simulation of electrochemical chloride removal (ECR) process is utilised to predict the ionic mass transport associated with chloride ingress into concrete or hydrated cement paste from a saline environment by incorporating the convection of pore solution.

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Simulation of Chloride Ingress through Surface-Coated ...

May 17, 2017  Therefore, the simulation of chloride ingress through surface-treated concrete requires further research. Migration tests [5, 6] provide a convenient way to estimate diffusivity of cement-based systems. The classical mathematical treatment to analyze the experimental data of the migration test solves the movement of single species and ...

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Effect of combined carbonation and chloride ion ingress by ...

May 15, 2014  Effect of combined carbonation and chloride ion ingress by an accelerated test method on microscopic and mechanical properties of concrete. ... and wetting and drying cycle simulation is illustrated in Fig. 1 schematically. In chamber 1 ... Capillary suction and diffusion model for chloride ingress into concrete. J Cem Concr Res, 38 (2008), ...

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(PDF) An Accelerated Test Method of Simultaneous ...

The effects of simultaneous carbonation and chloride ion attack on mechanical characteristics and durability of concrete containing silica fume have been investigated through an accelerated test method. Specimens containing different amounts of

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(PDF) An Accelerated Test Method of Simultaneous ...

May 17, 2016  An Accelerated Test Method of Simultaneous Carbonation and Chloride Ion Ingress: Durability of Silica Fume Concrete in Severe Environments May 2016 Advances in Materials Science and Engineering ...

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Modelling Chloride Ingress into Concrete Part 1 - Background

Simulation of Penetration Profile and Through Diffusion ... Thus accurate prediction of the rate of chloride ingress into concrete would lead to the establishment of specification of an adequate concrete cover to give defined service life. ... NT Build 443 “Concrete, Hardened: Accelerated Chloride Penetration” where a water-saturated ...

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Simulation of Chloride Ingress through Surface-Coated ...

May 17, 2017  Therefore, the simulation of chloride ingress through surface-treated concrete requires further research. Migration tests [5, 6] provide a convenient way to estimate diffusivity of cement-based systems. The classical mathematical treatment to analyze the experimental data of the migration test solves the movement of single species and ...

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Time dependence and similarity analysis of peak value of ...

Aug 30, 2018  Accelerated simulation of chloride ingress into concrete under drying–wetting alternation condition chloride environment Constr. Build. Mater. , 93 ( 2015 ) , pp. 205 - 213

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Chloride ingress testing of concrete - Browse

Nov 18, 2015  Concrete is recognised as a durable material that can provide long-term protection to embedded carbon steel reinforcement. However, effective protection can only be achieved if the mechanisms of deterioration and the durability properties of the protective material involved are fully understood. A well-known phenomenon is the ingress of chloride ions into concrete, which takes

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Entire Process Simulation of Corrosion due to the Ingress ...

A comprehensive mathematical model which can simulate the entire corrosion process of reinforcement in concrete is proposed in this paper. The combined effect of carbonation and chloride ingress is also discussed in the mass transport module. Nonuniform corrosion distribution is employed for the study of mechanical damage in concrete. The link of ABAQUS with MATLAB is adopted for the numerical ...

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Effect of concrete cracks on the corrosion of headed studs ...

The ingress of chloride ions into concrete slab was simulated and the concentration distribution of chloride ions on the stud surface was investigated. 4.1. Transport of chloride ions in concrete. The transport of chloride ions in concrete is a complicated process, involving diffusion, capillary suction, permeation, and electro-migration.

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王卫仑-深圳大学土木与交通工程学院

12、Zhiwu Yu, Ying Chen, Peng Liu, Weilun Wang: Accelerated simulation of chloride ingress into concrete under drying–wetting alternation condition chloride environment, Construction and Building Materials, Vol. 93, pp.205-213, 2015

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Numerical Simulation of Non-Uniformly Distributed ...

Jul 16, 2021  models, chloride penetration into non-saturated concrete is not represented exclusively by a diffusion transport mechanism, which will be explained in the next section. In [13], an experiment of accelerated corrosion is presented. According to experi-mental results, a numerical model based on the Discrete Element Method is proposed to

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Chloride ion ingress distribution within an alternate ...

Jan 16, 2012  Using the chloride ion unsaturated permeability model, the distribution regularity mechanism is analyzed. Finally, an improved indoor accelerated simulation experiment is proposed to simulate the rules governing chloride ion ingress into concrete structures in

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Effect of Temperature on Concrete Carbonation Performance

May 05, 2019  Effect of Temperature on Macroperformance of Carbonized Concrete. Due to temperature accelerating the carbonation rate, the effect of different temperatures (i.e., 10°C, 20°C, and 30°C) on concrete compressive strength after carbonation for 28 d was investigated. Figure 1 shows the change of concrete compressive strength with temperature.

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(PDF) Chloride ingress in concrete: SIMULATIONS of ...

The purpose was to get a quantitative measure of how different exposure conditions influence the durability of reinforced concrete, measured in terms of chloride ingress into the concrete.

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Simulation of chloride penetration in cement-based ...

Oct 01, 1997  OSTI.GOV Journal Article: Simulation of chloride penetration in cement-based materials Title: Simulation of chloride penetration in cement-based materials Full Record

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Prediction of chloride ingress into saturated concrete on ...

Prediction of chloride ingress into saturated concrete on the basis of a multi-species model by numerical calculations ... which can simplify the numerical simulation shown in ... accelerated ...

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Stochastic Simulation of Chloride Ingress into Reinforced ...

Stochastic Simulation of Chloride Ingress into Reinforced Concrete Structures by Means of Multi-Dimensional Gaussian Random Fields ... For many reinforced concrete structures corrosion of the reinforcement is an important problem since it can result in expensive maintenance and repair actions. ... (Monte Carlo Simulation). The chloride ingress ...

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Computational results of a model for chloride ingress in ...

Over the past decades a considerable research effort has been attributed to the modelling of chloride ingress into reinforced concrete in order to predict its durability. Traditional models are based on the error-function. In the present paper computational results of an advanced model are presented, which takes environmental temperature and humidity fluctuations, chloride binding, diffusion ...

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Bayesian Network Framework for Statistical ...

tests simulate chloride penetration into concrete as in natural conditions; accelerated tests speed up the chloride ingress rate and provide valuable mid- and long-term information on the chloride penetration process. Finally, Section 5 details the

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Effect of concrete cracks on the corrosion of headed studs ...

The ingress of chloride ions into concrete slab was simulated and the concentration distribution of chloride ions on the stud surface was investigated. 4.1. Transport of chloride ions in concrete. The transport of chloride ions in concrete is a complicated process, involving diffusion, capillary suction, permeation, and electro-migration.

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REDUCTION OF CHLORIDE ION INGRESS INTO REINFORCED CONCRETE

Jan 31, 2017  Reinforced concrete structures located in areas near the coast are exposed to potential corrosion attack. Corrosion attack can occur because of the infiltration of chloride ions into concrete. At the initiation of the corrosion process, the load-carrying capacity of a reinforced concrete member will be affected negatively as a function of time.

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EFFECT OF CARBONATION ON CHLORIDE PENETRATION

Chloride ions ingress and carbonation, which start from concrete surface and progress toward internal concrete, can both lead to accelerated corrosion of steel bars in concrete. When chloride ions ingress and carbonation take place simultaneously in concrete, Third RILEM workshop on Testing and Modelling the Chloride Ingress into Concrete

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Concrete durability: estimation of chloride concentration ...

Values of the coefficient of chloride diffusion D, as measured by the classical diffusion test and by a penetration test, are compared. It is shown that D cannot be determined reliably from penetration tests. Two sets of nomograms are developed for the design of concrete structures in chloride environments. The proposed nomograms can cope with a wide range of concrete variables: a basis is ...

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Chloride Ingress Control and Promotion of Internal Curing ...

Chloride ingress into concrete from the surrounding environment can result in the corrosion of the embedded steel reinforcement and cause damage to the concrete. Superabsorbent polymer (SAP) with fine particle size was incorporated into the structure of concrete for controlling the chloride ingress and improving its compressive strength via promotion of internal curing.

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Laboratory accelerated and outdoor durability testing of ...

of SCMs for the laboratory-accelerated condition was, on the other hand, relatively reduced for the outdoor exposure conditions where carbonation and chloride ingress progressed simultaneously in concrete. Keywords: supplementary cementitious materials, carbonation, chloride ingress, laboratory-accelerated . test, outdoor exposure test. 1.

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CAPILLARY SUCTION AND DIFFUSION MODEL FOR

CAPILLARY SUCTION AND DIFFUSION MODEL FOR CHLORIDE INGRESS INTO CONCRETE ... Simulation results from ... The water movement is accelerated in situations when there adhesion forces between the water and the porous structure of concrete contribute to this movement. This phenomenon is known as capillary suction.

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