Statistical analysis of time dependent variation of diffusion coefficient for various binary and ternary based concrete mixtures

Lehner, Petr; Ghosh, Pratanu; Konečný, Petr

doi:10.1016/j.conbuildmat.2018.06.048

Cited by 20 publications

(14 citation statements)

References 22 publications

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“…The environmental impact was assessed by analyzing the trace elements that can leach to water sources. The durability of concretes and mortars is influenced by certain parameters and their combination, and knowledge of these is essential in order to extend their life cycle [52]. A leaching test was carried out on the mixes 100C00GGBS00CS, 50C35GGBS15CS, and 80C10GGBS after 56 curing days according to NF EN 12457-2.…”

Section: Leaching Testsmentioning

confidence: 99%

Optimization of an Eco-Friendly Hydraulic Road Binders Comprising Clayey Dam Sediments and Ground Granulated Blast-Furnace Slag

et al. 2021

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This study investigated the potential use of Zerdezas dam Calcined Sediments (CS) and El-Hadjar Blast Furnace Slag (GGBS) from northern Algeria as a partial replacement of cement (C) in normal hardening hydraulic road binders. Two binder mix designs were optimized using a Response Surface Methodology (RSM). The first mix, 50C35GGBS15CS, consisted of 50% cement, 35% blast furnace slag, and 15% calcined sediment. The second mix, 80C10GGBS10CS, consisted of 80% cement, 10% blast furnace slag, and 10% calcined sediments. The tests of workability, setting time, volume expansion, compressive and flexural strengths, porosity, and SEM were conducted to ensure that both mixes meet the standard requirements for road construction binders. The two proposed mixes were qualified as normal hardening hydraulic road binder. The reuse of the sediments will contribute to a better disposal of dam sediments and steel industry waste and to preserve natural resources that are used for manufacturing cement. It will also contribute to the environmental impact reduction of cement clinker production by reducing greenhouse gas emissions.

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Section: Leaching Testsmentioning

confidence: 99%

Optimization of an Eco-Friendly Hydraulic Road Binders Comprising Clayey Dam Sediments and Ground Granulated Blast-Furnace Slag

et al. 2021

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“…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%

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

2020

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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.

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“…In the sustainable design of the concrete structures, it is necessary to find the balance between the material side (i.e., the development of new concrete mixtures with the required properties [1][2][3]), an appropriate description of performance (i.e., testing and proper statistical evaluation [4][5][6]), and structural and modelling components (i.e., sufficiently durable and sustainable design [7][8][9][10]). All three components must be considered together and looked at from the perspective of the studied problem, financial demands, production, or a possible estimate of the reconstruction of the proposed structure.…”

Section: Introductionmentioning

confidence: 99%

“…Since concrete is a heterogeneous material that changes its properties significantly over time, the analysis of diffusion parameter data measured in the laboratory is of great importance [23]. Such analysis was demonstrated by a study on a different set of binary and ternary high-performance concrete mixtures [4], where the entire process of in-depth statistical analysis of several binary and ternary concrete mixtures blended with various SCMs is described in a detailed manner. The study [4] focused on SCMs namely metakaolin, silica fume, fly ash Class F, fly ash Class C, and ground granulated blast furnace slag class 120.…”

Section: Introductionmentioning

confidence: 99%

Variation of Durability and Strength Parameters of Pumice Based Mixtures

2021

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The numerical modelling of chloride penetration into concrete is very sensitive to the correct description of the input data. In the recent era, high-performance concrete (HPC), which combines Portland cement and other supplementary cementitious materials, has been gaining attraction due to their desirable material properties and durability. The presented results show the application of the modified approach for the evaluation of the suitability of the time-dependent model for the variation of the diffusion coefficient. The 26 various binary and ternary-based concrete mixtures blended with volcanic pumice pozzolan (VPP) as a major supplementary cementitious material (SCM) are compared with the reference Ordinary Portland Cement mixture. Other SCMs namely fly ash, slag, silica fume, and metakaolin were also utilized in ternary-based concrete mixtures. In-depth statistical analysis was carried out to show the variability and effects of the amount of the volcanic pumice as an SCM on the diffusion coefficient. The mean value and regression via linear approximation of the time-dependent coefficient of variation of the diffusion coefficients were used as well as the Root of Mean Squared Error approach. The presented results are suitable as the component of the input parameters for the durability-related probabilistic assessment of the reinforced concrete structures exposed to chlorides. In addition, the time-dependent ultimate limit state-related data was presented.

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Statistical analysis of time dependent variation of diffusion coefficient for various binary and ternary based concrete mixtures

Cited by 20 publications

References 22 publications

Optimization of an Eco-Friendly Hydraulic Road Binders Comprising Clayey Dam Sediments and Ground Granulated Blast-Furnace Slag

Optimization of an Eco-Friendly Hydraulic Road Binders Comprising Clayey Dam Sediments and Ground Granulated Blast-Furnace Slag

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

Variation of Durability and Strength Parameters of Pumice Based Mixtures

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