chloride penetration into concretes incorporating mineral
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chloride penetration into concretes incorporating mineral.

Chloride Penetration - an overview ScienceDirect Topics

Chloride penetration refers to the depth to which chloride ions from the environment penetrate into the concrete. This can lead to corrosion in RCC structures, and thus study of chloride permeability is an important aspect that affects the durability of the concrete. Chloride ions transport mechanism is a complex system and possibly includes ...

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Chloride Penetration in Concrete - GERMANN

impenetrable concrete. Therefore, the resistance to penetration of chloride ions into concrete must be known for design as well as quality control purposes and, in order to assess this resistance to chloride penetration, test methods are needed to allow the determination of

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Chloride penetration in shrinkage-compensating cement ...

Oct 01, 2020  With the goal of obtaining an in-depth understanding of penetration of aggressive agents, particularly chloride ions, into shrinkage-compensating cement concretes, a comprehensive laboratory testing program was established to evaluate the concretes that include a range of dosages of Type K expansive agent (i.e., 0%, 7.5%, 15%, and 22.5% by ...

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(PDF) Influence of mineral additions on the microstructure ...

Chloride ion penetration Figures 6-9 shows the chloride content profiles of all concrete at 182, 364 and 546 days exposure, where each value is the average of two measurements. The results showed that the silica fume and blast furnace slag concretes presented lower Cl than fly ash and control concrete at all exposure times and it was also ...

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CONCRETELIBRARYOFJSCENO.32,DECEMBER1998

Permeability Test (RCPT) to the evaluation of chloride ion penetration into concretes with and without mineral admixtures Changms in the chloride permeabilityof concrete withthe depth ... Figure 4 Changes in charge passed by concretes incorporating mineral admixtures with exposure time (0-50 mm)-22-or l'Negligible", as is the case for latex ...

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Chloride penetration in shrinkage-compensating cement ...

Oct 01, 2020  With the goal of obtaining an in-depth understanding of penetration of aggressive agents, particularly chloride ions, into shrinkage-compensating cement concretes, a comprehensive laboratory testing program was established to evaluate the concretes that include a range of dosages of Type K expansive agent (i.e., 0%, 7.5%, 15%, and 22.5% by ...

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Chloride penetration into recycled aggregate concrete ...

Jun 20, 2018  The results show that the chloride profiles in RAC is dependent on the mixtures and the flexural loading applied to the concrete. Coarse RCA induces considerable influence on chloride penetration in concrete. The addition of mineral admixtures makes concrete more compactness hinder chloride ions ingress into interior concrete.

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CONCRETELIBRARYOFJSCENO.32,DECEMBER1998

Permeability Test (RCPT) to the evaluation of chloride ion penetration into concretes with and without mineral admixtures Changms in the chloride permeabilityof concrete withthe depth ... Figure 4 Changes in charge passed by concretes incorporating mineral admixtures with exposure time (0-50 mm)-22-or l'Negligible", as is the case for latex ...

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Critical Review on effect of Chloride Penetration on ...

The chloride penetration depth and sorptivity of all seven concretes are also measured. Results show that the geopolymer concretes exhibited better corrosion resistance than OPC concrete.

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Concrete Durability: Review of Rapid Chloride Permeability ...

This is especially so for concretes incorporating chemical and mineral admixtures. This review ... Various durability tests have been developed for the evaluation of the resistance of concretes to chloride ion penetration. The tests can be broadly grouped into ponding/immersion/salt spray tests, ...

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Chloride ingress and strength loss in concrete with ...

layers, and particularly for concretes containing mineral admixtures CH was absent in the surface region and was replaced with brucite and calcite. The mineral admixtures reduced the level of chloride penetration into the concrete and were much more effective in reducing chloride ingress than were reductions in w/c ratio in the PC concrete,

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Modeling of chloride diffusion in a hydrating concrete ...

Nov 25, 2012  Silica fume has long been used as a mineral admixture to improve the durability and produce high strength and high performance concrete. And in marine and coastal environments, penetration of chloride ions is one of the main mechanisms causing concrete reinforcement corrosion. In this paper, we proposed a numerical procedure to predict the chloride diffusion in a hydrating silica

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Influence of steam curing on the properties of concretes ...

Dec 04, 2009  Resistance to chloride ion penetration. Effects of curing condition and the type and quantity of the mineral admixtures on rapid chloride ion permeability are depicted in Fig. 6. The use of SF appeared to be more effective in reducing the chloride ion permeability of concretes, especially the effect being increased with increasing SF content ...

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Resistance Properties to Chloride Ingress of Standard ...

Feb 24, 2020  In regions where the concrete structures are exposed to a salty environment, the concrete requires high resistance to chloride-ion penetration. To achieve higher resistance against chloride ingress, a pozzolanic admixture incorporating a high volume of SiO2 and Al2O3 has been developed. The admixture is a fine mineral powder with a specific surface area of 13,000 m2/kg or higher.

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Chloride-Induced Corrosion of Steel in Concrete: An ...

Andrade et al. [] proposed an approach to use the electrical resistivity of concrete to represent porosity and pore connectivity in modelling chloride penetration into concrete.This approach also considers the effect of concrete age on reduction of the coefficient of chloride diffusion. Farahani et al. [] developed a model for estimating the service life of RC structures under chloride ...

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Modeling of chloride diffusion in a hydrating concrete ...

Furthermore, based on the modeling of physicochemical processes of diffusion of chloride ion into concrete, the chloride distribution in silica fume blended concrete is evaluated. The prediction results agree well with experiment results of chloride ion concentrations in the hydrating concrete incorporating silica fume. Files in This Item:

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Evaluation of Concrete Permeability by Monitoring Alkali ...

Concrete conductivity is the reflection of the micro pore structure and the pore solution conductivity of concrete, but the conductivity of pore solution changes considerably as different mineral admixtures are added, though the change is not always relevant to permeability and Cl- diffusivity. Saturation of concrete capillary pore system with 1 mol/l KOH solution through vacuum processing was ...

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Effect of curing on the compressive strength, resistance ...

Jan 01, 1995  Resistance to the penetration of chloride ions The resistance of the concretes to the penetration of chloride ions was determined by ASTM C 1202. Briefly, this test consists of monitoring the amount of electrical current passed through a 102-mm diameter x 51-mm thick concrete disc, when a potential difference of 60 V DC is main- tained across ...

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Materials Free Full-Text Influence of Chloride-Ion ...

The influence of a chloride-ion adsorption agent (Cl agent in short), composed of zeolite, calcium aluminate hydrate and calcium nitrite, on the ingress of chloride ions into concrete and mortar has been experimentally studied. The permeability of concrete was measured, and the chloride ion content in mortar was tested. The experimental results reveal that the Cl agent could adsorb chloride ...

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Concrete Durability: Review of Rapid Chloride Permeability ...

This is especially so for concretes incorporating chemical and mineral admixtures. This review ... Various durability tests have been developed for the evaluation of the resistance of concretes to chloride ion penetration. The tests can be broadly grouped into ponding/immersion/salt spray tests, ...

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Chloride penetration resistance of concrete containing ...

Jan 25, 2014  This research presents the effect of various ground pozzolanic materials in blended cement concrete on the strength and chloride penetration resistance. An experimental investigation dealing with concrete incorporating ground fly ash (GFA), ground bottom ash (GBA) and ground rice husk ash (GRHA). The concretes were mixed by replacing each pozzolan to Ordinary Portland

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Influence of steam curing on the properties of concretes ...

Dec 04, 2009  Resistance to chloride ion penetration. Effects of curing condition and the type and quantity of the mineral admixtures on rapid chloride ion permeability are depicted in Fig. 6. The use of SF appeared to be more effective in reducing the chloride ion permeability of concretes, especially the effect being increased with increasing SF content ...

Get Price

Chloride ingress and strength loss in concrete with ...

layers, and particularly for concretes containing mineral admixtures CH was absent in the surface region and was replaced with brucite and calcite. The mineral admixtures reduced the level of chloride penetration into the concrete and were much more effective in reducing chloride ingress than were reductions in w/c ratio in the PC concrete,

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Concrete Durability Probed Using Compressive Strength ...

Concrete Durability Probed Using Compressive Strength, Chloride Penetration and Porosity Measurements on CEMII and CEMV Concretes Incorporating Mollusc Shell Spares in Artificial and Natural Seawaters Marine D. Georges 1, Amel. Bourguiba , Nassim. Sebaibi , Daniel. Chateigner2 and Mohamed. Boutouil1

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Study on Optimization and Properties of Foamed Concrete ...

Concrete Incorporating Mineral Admixture Aneesa Mol U M Dr. Elson John ... decreased the resistance to chloride ion penetration and increased the drying shrinkage and creep of concrete. Nevertheless, the ... geopolymer foam concretes, this paper addresses some of the sustainability questions currently facing the cement and concrete ...

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Comparison of chloride penetration into surface-treated ...

Nov 21, 2016  The chloride diffusion coefficients and surface chloride contents were calculated based on Fick’s second law. The results show that high-performance concrete and surface treatment clearly slow the chloride penetration into the concrete both in the laboratory and in situ.

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Modelling Chloride Ingress into Concrete Part 3 - Success ...

Torii K., Sasatani T., Kawamura M., "Chloride penetration in concretes incorporating mineral admixtures in a marine environment". pp 701– 716. in Sixth CANMET/ACI/JCI International Conference on Fly Ash, Silica Fume, Slag and Natural Pozzolans in

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(PDF) “COMPRESSIVE STRENGTH AND CHLORIDE PERMEABILITY

Juni Khyat ISSN: 2278-4632 (UGC Care Group I Listed Journal) Vol-11 Issue-01 No.01 January 2021 “COMPRESSIVE STRENGTH AND CHLORIDE PERMEABILITY OF CONCRETE MIX INCORPORATING PLASTIC WASTE AND DEMOLISHED AGGREGATES” Tarun Gehlot, Ph.D. Scholar, Department of Structural Engineering, J.N.V.U. Jodhpur, Rajasthan Om Prakash Singh,

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"Performance of PLC concrete incorporating chemical and ...

Portland limestone cement, PLC, has been produced by inter-grinding clinker with crushed limestone and gypsum. The crushed limestone introduced in PLC manufacturing as a partial replacement of the clinker serves in conserving energy and reducing CO2 emissions. Since CO2 is a main greenhouse gas that contributes to global warming, its reduction has gained attention.

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Application of Rapid Chloride Permeability Test to ...

Jul 01, 1997  This paper presents the data on the application of the Rapid Chloride Permeability Test (RCPT) to the evaluation of chloride-ion penetration into the concretes with and without mineral admixtures. OPC concretes, fly ash 30 % concretes, blast-furnace slag 50 % concretes and silica fume 10 % concretes were prepared.

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Resistance Properties to Chloride Ingress of Standard ...

Feb 24, 2020  In regions where the concrete structures are exposed to a salty environment, the concrete requires high resistance to chloride-ion penetration. To achieve higher resistance against chloride ingress, a pozzolanic admixture incorporating a high volume of SiO2 and Al2O3 has been developed. The admixture is a fine mineral powder with a specific surface area of 13,000 m2/kg or higher.

Get Price

Effects of hydrostatic pressure on chloride ion ...

This paper investigates chloride ion penetration into concrete under a hydrostatic pressure environment. Fresh concrete and concretes mixed with various mineral admixtures are prepared, and the influence of the value and application time of hydrostatic pressure on chloride ion penetration

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Chloride Penetration in Lightweight Aggregate Mortars ...

Jul 03, 2018  The current research is aiming to investigate the chlorides’ penetration resistance of 9 different pumice lightweight aggregate mortars (LWAMs). The composition of the mixture is altered by the addition of metakaolin, fly ash, silica fume, and ground granulated blast furnace slag, substituting 10% and 20% of cement by mass.

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