Comparison of Chloride Diffusion Coefficient Evaluation Based on Electrochemical Methods

Konečný, Petr; Lehner, Petr; Ponikiewski, Tomasz; Miera, Patrycja

doi:10.1016/j.proeng.2017.05.326

Cited by 19 publications

(16 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It shows that the higher the relative weight of the steel fibres, the higher the tensile splitting strength. However, other mechanical properties show that, when the amount of fibres exceeds a certain value, 39 [GPa] The second possibility is comparison related to the number of steel fibres in the SCC mixture. It shows that the higher the relative weight of the steel fibres, the higher the tensile splitting strength.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…The resulting values of diffusion coefficients calculated from direct chloride profiling, and indirect electrochemical methods (RCPT and resistivity), are given in Figure 6 and in Table 2. The calculation of the diffusion coefficient D c(t) is based on the procedures given in [35,37] and is very well described in [36,38,39]. The number of analysed samples mean value and standard deviation is given in Table 2.…”

Section: Comparison Of Diffusion Coefficientsmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of Material Properties of SCC Concrete with Steel Fibres Related to Ingress of Chlorides

2020

Self Cite

View full text Add to dashboard Cite

The paper focuses on the evaluation of chloride ion diffusion coefficient of self-compacting concrete with steel fibre reinforcement. The reference concrete from Ordinary Portland Cement (OPC) and Self-Compacting Concrete (SCC) with several values of added steel fibres—0%, 1% and 2% of weight—were cast in order to investigate the effect of fibres. The three procedures of diffusion coefficient calculation are presented—rapid chloride penetration test, accelerated penetration tests with chloride as well as the surface measurement of electrical resistivity using Wenner probe. The resulting diffusion coefficients obtained by all methods are compared and evaluated regarding the basic mechanical properties of concrete mixtures.

show abstract

Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Comparison Of Diffusion Coefficientsmentioning

confidence: 99%

Comparison of Material Properties of SCC Concrete with Steel Fibres Related to Ingress of Chlorides

2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…There are different methods to measure the resistance to attack by chlorides in concrete. These, in turn, lead to studies to be able to compare the results or analyze their validity [68]. In this case the immersion method has been chosen to simulate the attack and the colorimeter process to measure it.…”

Section: Chloride Ion Penetrationmentioning

confidence: 99%

Recycled Plastic and Cork Waste for Structural Lightweight Concrete Production

et al. 2019

View full text Add to dashboard Cite

The use of waste materials as lightweight aggregates in concrete is highly recommended in seismic risk areas and environmentally recommended. However, reaching the strength needed for the concrete to be used structurally may be challenging. In this study four dosages were assayed: the first two-specimen had high cement content (550 and 700 kg/m3 respectively), Nanosilica, fly ash and superplasticizer. These samples were high performance, reaching a strength of 100MPa at 90 days. The other two mixtures were identical but replaced 48% of the aggregates with recycled lightweight aggregates (30% polypropylene, 18.5% cork). To estimate its strength and durability the mixtures were subjected to several tests. Compression strength, elasticity modulus, mercury intrusion porosimetry, carbonation, attack by chlorides, and penetration of water under pressure were analyzed. The compression strength and density of the lightweight mixtures were reduced 68% and 19% respectively; nonetheless, both retained valid levels for structural use (over 30MPa at 90 days). Results, such as the total porosity between 9.83% and 17.75% or the chloride ion penetration between 8.6 and 5.9mm, suggest that the durability of these concretes, including the lightweight ones, is bound to be very high thanks to a very low porosity and high resistance to chemical attacks.

show abstract

“…In order to calculate the chloride diffusion coefficient (D) in concrete, 3 factors (chloride concentration, curing, and environment temperature) were considered and used to predict concrete's life of service [17,18]. Wang et al used Fick's second law to calculate diffusion coefficient of chloride ion [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Diffusion Process of Sulfate Ion in Cemented Gangue Backfill Material

Yao

Wang

Feng

et al. 2020

Advances in Civil Engineering

View full text Add to dashboard Cite

Cemented gangue backfill material (CGBM) is made of coal gangue, fly ash, cement, and water. The backfill body will be corroded by mine water that contains different kinds of corrosive ions. The paper mainly aimed to study the diffusion process of sulfate ion (SO42−) in CGBM. Soluble salt solutions with different concentrations are prepared to simulate various mine water. The SO42− concentration was measured by layered sampling method and chemical analyzing method. The diffusion coefficient was calculated according to the second Fick’s law. Scanning electron microscope (SEM) and X-ray diffraction (XRD) were used to analyze the degradation mechanisms. The experimental results showed that the SO42− concentration increases in CGBM when the external sulfate solutions concentration increases. With the increasing of magnesium ion (Mg2+) concentration and bicarbonate ion (HCO3−) concentration in the external corrosion solutions, the diffusion coefficient of SO42− was increased, and HCO3− has more significant effects than Mg2+. SO42− reacting with CGBM produced ettringite and gypsum. The ettringite and gypsum changed the pore structure of hardened CGBM and affected the compressive strength of hardened CGBM. Studying the diffusion of SO42− can contribute to predicting the service life of CGBM.

show abstract

Comparison of Chloride Diffusion Coefficient Evaluation Based on Electrochemical Methods

Cited by 19 publications

References 11 publications

Comparison of Material Properties of SCC Concrete with Steel Fibres Related to Ingress of Chlorides

Comparison of Material Properties of SCC Concrete with Steel Fibres Related to Ingress of Chlorides

Recycled Plastic and Cork Waste for Structural Lightweight Concrete Production

Experimental Study on Diffusion Process of Sulfate Ion in Cemented Gangue Backfill Material

Contact Info

Product

Resources

About