accelerated simulation of chloride ingress into concrete

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

Effect of combined carbonation and chloride ion ingress by an accelerated test method on microscopic and mechanical properties of concrete. Construction and Building Materials, 2014 ... HIGH PERFORMANCE REINFORCED CONCRETE, CORROSION – RESISTANT INTO AGGRESSIVE INDUSTRIAL ENVIRONMENTS. By Francisco Vazquez Rodriguez, E. De Los Santos, JOSE ...

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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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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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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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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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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 combined carbonation and chloride ion ingress by ...

Effect of combined carbonation and chloride ion ingress by an accelerated test method on microscopic and mechanical properties of concrete. Construction and Building Materials, 2014 ... HIGH PERFORMANCE REINFORCED CONCRETE, CORROSION – RESISTANT INTO AGGRESSIVE INDUSTRIAL ENVIRONMENTS. By Francisco Vazquez Rodriguez, E. De Los Santos, JOSE ...

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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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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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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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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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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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Simulation of Chloride Migration in Compression-Induced ...

Jul 07, 2012  Numerical simulation of the rapid chloride-migration test using multiphysics finite element software is presented in which a phenomenological damage model and a chloride-binding isotherm coupled with Nernst-Planck equation is used to evaluate chloride migration in the damaged concrete

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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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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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Modeling and Measuring Chloride Ingress into Cracked

Chloride ingress into reinforced concrete structures is a cause of corrosion of steel embedded into concrete. To aid in the prediction of concrete service life, a chloride ingress model that includes the effects of physical absorption to and chemical reaction with the cement matrix as well as time-

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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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ACCELERATED CHLORIDE MIGRATION TESTS IN C ONCRETE

ACCELERATED CHLORIDE MIGRATION TESTS IN C ONCRETE P . +ODYiþHN *, - 1 PHþHN ** Abstract: Accelerated chloride migration tests are performed on cylindrical samples made of Portland cement concrete . Low voltage electric field is applied as a driving force for both chloride accelerated penetration and extraction.

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The Simulation Experiment and the Similarity of Chloride ...

To obtain the similarity relationship between the simulation experiment and the field experiment of chloride ion erosion in the concrete under the marine environment, on the basis of chloride ion ingress concrete under the onsite marine environment in Zhou Shan, a series of field corrosion tests involving the chloride ion ingression in the costal tidal zone are carried out.

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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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Interaction of carbonation and chloride ions ingress in ...

environment has no influence in the chloride ingress into the samples studied. Chengfang et al. [10] subjected OPC concrete specimens to carbonation chamber (20% CO2, 20ºC and 70% RH) for 14 and 28 days and after to immersion in 5% NaCl solution and drying in laboratory environment cycles to

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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.

Get price

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 ...

Get price

无碳化影响时干湿交替下水泥基材料中氯离子传输行为-《东南大学

Nov 20, 2019  [1] Yu Z W, Chen Y, Liu P, et al. Accelerated simulation of chloride ingress into concrete under drying-wetting alternation condition chloride environment[J]. Construction and Building Materials , 2015, 93: 205-213.

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Simulation of Chloride Migration in Compression-Induced ...

Jul 07, 2012  Numerical simulation of the rapid chloride-migration test using multiphysics finite element software is presented in which a phenomenological damage model and a chloride-binding isotherm coupled with Nernst-Planck equation is used to evaluate chloride migration in the damaged concrete

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Parameter identification in chloride ingress from ...

Chloride ingress into concrete is one of the main causes leading to the degradation of reinforced concrete (RC) structures. Important damages due to chloride-attack are reported after 10-20 years and thus, structures should be inspected periodically to ensure optimal levels of serviceability and safety. Modelling chloride ingress into concrete, therefore, becomes an important task to plan and ...

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Time-dependent characteristic and similarity of chloride ...

Jan 02, 2018  Therefore, it is advisable to conduct similarity analysis of chloride ingress into concrete between an artificial simulated environment and a field marine environment. Based on the existing field exposure test, an accelerated simulated test with the same concrete mixture proportions as the exposure test under a tidal environment were designed ...

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Time-dependent chloride penetration in concrete in marine ...

Abstract In order to study the effects of exposure conditions (atmospheric, tidal and splash zones) on chloride ingress into concrete and time-dependent chloride diffusivity of concrete, the chloride concentration of existing concrete in the Beibu Gulf was tested by field investigation. In addition, a reasonable calculation model was chosen by comparative analysis to achieve an accurate ...

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