Long term effect of corrosion inhibitor and associated cation type of chloride ions on chloride profile of concrete exposed to composite chloride-sulfate environment

Das, Jyotish Kumar; Pradhan, Bulu

doi:10.1016/j.matpr.2020.04.014

Cited by 13 publications

(11 citation statements)

References 24 publications

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“…Neville has reported that sodium nitrites and calcium nitrites effectively protect against corrosion in the presence of chloride ions [162]. Das and Pradhan investigated the corrosion mitigation properties of concrete with a dosage of 3% NaNO2 by weight of cement [163]. These concretes were exposed to chloride and sulphate solution and based on the resulting experimental data, they reported that the addition of sodium nitrite decreased chloride diffusion in the concrete which, due to the formation of nitrite films, Neville has reported that sodium nitrites and calcium nitrites effectively protect against corrosion in the presence of chloride ions [162].…”

Section: Corrosion Inhibiting Admixturesmentioning

confidence: 99%

Review of the Effects of Supplementary Cementitious Materials and Chemical Additives on the Physical, Mechanical and Durability Properties of Hydraulic Concrete

et al. 2021

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Supplementary cementitious materials (SCMs) and chemical additives (CA) are incorporated to modify the properties of concrete. In this paper, SCMs such as fly ash (FA), ground granulated blast furnace slag (GGBS), silica fume (SF), rice husk ash (RHA), sugarcane bagasse ash (SBA), and tire-derived fuel ash (TDFA) admixed concretes are reviewed. FA (25–30%), GGBS (50–55%), RHA (15–20%), and SBA (15%) are safely used to replace Portland cement. FA requires activation, while GGBS has undergone in situ activation, with other alkalis present in it. The reactive silica in RHA and SBA readily reacts with free Ca(OH)2 in cement matrix, which produces the secondary C-S-H gel and gives strength to the concrete. SF addition involves both physical contribution and chemical action in concrete. TDFA contains 25–30% SiO2 and 30–35% CaO, and is considered a suitable secondary pozzolanic material. In this review, special emphasis is given to the various chemical additives and their role in protecting rebar from corrosion. Specialized concrete for novel applications, namely self-curing, self-healing, superhydrophobic, electromagnetic (EM) wave shielding and self-temperature adjusting concretes, are also discussed.

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Section: Corrosion Inhibiting Admixturesmentioning

confidence: 99%

Review of the Effects of Supplementary Cementitious Materials and Chemical Additives on the Physical, Mechanical and Durability Properties of Hydraulic Concrete

et al. 2021

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“…Method. RCM method cannot fully reflect the real diffusion process of chloride ions in concrete [48,49], and it was difficult to describe the solidification behavior of chloride ions in concrete with LDHs. In order to more truly reveal the influence of LDHs on the chloride ion permeability resistance of concrete, this paper used the chloride salt long-term immersion method to achieve this goal.…”

Section: Long-term Immersionmentioning

confidence: 99%

Experimental Investigation of MgAl‐NO₂ and MgAl‐CO₃ LDHs on Durability of Mortar and Concrete

Wang

et al. 2021

Advances in Materials Science and Engineering

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Two kinds of layered double hydroxides (LDHs), MgAl-NO2 (N-LDH) and MgAl-CO3 (C-LDH), were incorporated to study the durability of mortar and concrete. The LDH contents of mortar were 1%, 2%, and 4% by mass and the LDH contents of concrete were 0.5%, 1%, 2%, 4%, respectively. The effect of LDHs on sulfate resistance of mortar was studied through dry-wetting cycle test, compressive strength test, and flexural strength test. In addition, the effects of LDHs on pore structure, chloride resistance, carbonation resistance, shrinkage, and creep of concrete were investigated by SEM, mercury injection test, XRD, chloride ion diffusion coefficient test, chloride salt corrosion depth test, carbonation depth test, shrinkage test, and creep test. The results showed that LDHs can improve the ability of resisting ion corrosion, carbonization, shrinkage, and creep, reduce the pore content, and optimize the pore structure of mortar and concrete to some extent. Moreover, 4% LDHs had a better effect on improving the durability of mortar and concrete compared to 0.5%, 1%, and 2% LDHs, and the effect of C-LDH was better than N-LDH.

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“…Van Quan Tran [39,40] and Guo et al [41] simulated the interaction among ions based on the numerical model of thermodynamic equilibrium, kinetic control, and surface complexation and confirmed that the interaction among the ions had an influence on the diffusion behavior of chloride. Jyotish Kumar Das et al [42] studied the diffusion behavior of chloride when different chloride coexist with SO 4 2− , and the results showed that the presence of SO 4 2− would reduce the binding rate of chloride, because SO 4 2− was more likely to adsorb on C-S-H. Jin [43] studied the permeation character of chloride and water in concrete under hydrostatic pressure. The results showed that the penetration depth of water, the penetration depth of chloride and chloride concentration all increased with the hydrostatic pressure, and pressurization time.…”

Section: Introductionmentioning

confidence: 99%

Influence of Hydrostatic Pressure and Cationic Type on the Diffusion Behavior of Chloride in Concrete

Liu

Jiang

2021

Materials

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The durability of the concrete in underground and marine engineering is affected by the underground and ocean environment. Chloride diffusion coefficient under hydrostatic pressure is a key parameter of concrete durability design under corresponding conditions. Therefore, this paper studies the diffusion behavior of chloride in different diffusion source solutions by experiment and simulation. Based on the experimental results, this paper proposes a new chloride diffusion model under the coupling effect of diffusion and convection. The interaction of ions and compounds in the diffusion source solutions, concrete pore fluid, and concrete material are considered in the new chloride diffusion model. The experimental results show that chloride diffusion rate is significantly affected by hydrostatic pressure, which increases with the increase of hydrostatic pressure. The chloride diffusion coefficient shows a certain difference in difference diffusion source solutions. The chloride diffusion coefficient in divalent cationic diffusion source solutions is the largest, the chloride diffusion coefficient in the divalent and monovalent cationic compound ones is in the middle, and the chloride diffusion coefficient in the monovalent cationic ones is the smallest. There is a linear relationship between the chloride diffusion coefficient and the hydrostatic pressure whether in single or combined cationic diffusion source solutions.

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Long term effect of corrosion inhibitor and associated cation type of chloride ions on chloride profile of concrete exposed to composite chloride-sulfate environment

Cited by 13 publications

References 24 publications

Review of the Effects of Supplementary Cementitious Materials and Chemical Additives on the Physical, Mechanical and Durability Properties of Hydraulic Concrete

Review of the Effects of Supplementary Cementitious Materials and Chemical Additives on the Physical, Mechanical and Durability Properties of Hydraulic Concrete

Experimental Investigation of MgAl‐NO₂ and MgAl‐CO₃ LDHs on Durability of Mortar and Concrete

Influence of Hydrostatic Pressure and Cationic Type on the Diffusion Behavior of Chloride in Concrete

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Long term effect of corrosion inhibitor and associated cation type of chloride ions on chloride profile of concrete exposed to composite chloride-sulfate environment

Cited by 13 publications

References 24 publications

Review of the Effects of Supplementary Cementitious Materials and Chemical Additives on the Physical, Mechanical and Durability Properties of Hydraulic Concrete

Review of the Effects of Supplementary Cementitious Materials and Chemical Additives on the Physical, Mechanical and Durability Properties of Hydraulic Concrete

Experimental Investigation of MgAl‐NO2 and MgAl‐CO3 LDHs on Durability of Mortar and Concrete

Influence of Hydrostatic Pressure and Cationic Type on the Diffusion Behavior of Chloride in Concrete

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Experimental Investigation of MgAl‐NO₂ and MgAl‐CO₃ LDHs on Durability of Mortar and Concrete