Relation between water permeability and chloride diffusivity of concrete under compressive stress: Experimental investigation and mesoscale lattice modelling

Tran, The-Truyen; Pham, Duc Tho; Vu, Minh‐Ngoc; Truong, Van Quyet; Ho, Xuan Ba; Tran, Ngoc Long; Nguyen‐Sy, Tuan; To, Quy‐Dong

doi:10.1016/j.conbuildmat.2020.121164

Cited by 31 publications

(11 citation statements)

References 58 publications

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“… Water permeability versus compressive level for two concrete mix proportion (experimental and modeling results). Copied from reference [ 69 ] with copyright permission from Elsevier. …”

Section: Carbonation Of Concrete Under Sustained Loadmentioning

confidence: 99%

Effect of the Mechanical Load on the Carbonation of Concrete: A Review of the Underlying Mechanisms, Test Methods, and Results

2021

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As one of the major causes of concrete deterioration, the carbonation of concrete has been widely investigated over recent decades. In recent years, the effect of mechanical load on carbonation has started to attract more attention. The load-induced variations in crack pattern and pore structure have a significant influence on CO2 transport which determines the carbonation rate. With different types of load, the number, orientation, and position of the induced cracks can be different, which will lead to different carbonation patterns. In this review paper, the carbonation in cracked and stress-damaged concrete is discussed first. Then, literature about the effect of sustained load during carbonation is compared in terms of load type and load level. Finally, the advantages and disadvantages of possible test methods for investigating the effect of sustained load on carbonation are discussed with respect to loading devices, load compensation, and specimen size.

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“… Water permeability versus compressive level for two concrete mix proportion (experimental and modeling results). Copied from reference [ 69 ] with copyright permission from Elsevier. …”

Section: Carbonation Of Concrete Under Sustained Loadmentioning

confidence: 99%

Effect of the Mechanical Load on the Carbonation of Concrete: A Review of the Underlying Mechanisms, Test Methods, and Results

2021

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“…Most existing permeability models are based on the intrinsic permeability calculation model of porous media. It was thought that the permeability of the ITZ is in direct proportion to the porosity, pore connectivity, and pore size [28][29][30]. Some models considered the effect of simplified ITZ microstructures on permeability [30].…”

Section: Introductionmentioning

confidence: 99%

“…It was thought that the permeability of the ITZ is in direct proportion to the porosity, pore connectivity, and pore size [28][29][30]. Some models considered the effect of simplified ITZ microstructures on permeability [30]. However, the high complex and irregular geometry features have been ignored [31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Pore Structure and Permeability of Concrete–Rock Interfacial Transition Zones Based on Fractal Theory

et al. 2022

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The concrete–rock interfacial transition zone (ITZ) is generally considered the weak layer in hydraulic engineering, for it is more permeable than the intact concrete or rocks. The water permeability of the ITZ is a critical parameter concerned with structural safety and durability. However, the permeability and pore structure of the ITZ has not been investigated previously, and the mathematical model of ITZ permeability has not been established. This study performed multi-scale experiments on the concrete–rock ITZ with various rock types (limestone, granite, and sandstone). A series of quantitative and qualitative analysis techniques, including NMR, SEM-EDS, and XRD, characterize the ITZ pore structures. The controlled constant flow method was used to determine the permeability of the concrete, rock, and ITZ. The mathematical model of ITZ permeability was proposed using the fractal theory. The consistency between the experimental data and the proposed model indicates the reliability of this study. The results of the experiment show that ITZ permeability is between 4.08 × 10−18 m2 and 5.74 × 10−18 m2. The results of the experiment and the proposed model could determine ITZ permeability in hydraulic structure safety and durability analysis.

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“…Many experimental investigations have been carried out to understand the influence of microcracks on moisture transport in cementitious materials. Microcracks were produced by different methods, such as tension [ 15 , 16 , 17 , 18 , 19 ], compression [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ], flexure [ 32 ], and freeze–thaw cycles [ 16 , 30 , 32 ]. Mass-transport properties were measured by different testing methods, such as chloride permeability [ 26 , 27 , 29 , 30 , 31 , 32 , 33 , 34 ], sorptivity [ 16 , 17 , 28 , 31 , 34 ], gas permeability [ 22 , 23 , 24 , 25 , 29 , 34 ], and water permeability [ 18 , 19 , 20 , 21 , 22 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

“…Microcracks were produced by different methods, such as tension [ 15 , 16 , 17 , 18 , 19 ], compression [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ], flexure [ 32 ], and freeze–thaw cycles [ 16 , 30 , 32 ]. Mass-transport properties were measured by different testing methods, such as chloride permeability [ 26 , 27 , 29 , 30 , 31 , 32 , 33 , 34 ], sorptivity [ 16 , 17 , 28 , 31 , 34 ], gas permeability [ 22 , 23 , 24 , 25 , 29 , 34 ], and water permeability [ 18 , 19 , 20 , 21 , 22 , 34 ]. However, not many of these studies directly addressed the effect of microcracks on unsaturated transport.…”

Section: Introductionmentioning

confidence: 99%

Moisture Transport of Axial-Compression-Damaged Mortar and Concrete in Atmospheric Environment

et al. 2022

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The moisture transport of axial-compression-damaged mortar and concrete was experimentally and analytically studied in this paper. Five stress levels, i.e., 25%, 40%, 55%, 70%, and 85%, of the corresponding ultimate compressive strengths were selected for mortar and concrete specimens with the water cement ratio (w/c) of 0.5. Porosities and sorptivities of mortar or concrete before and after axial compression were measured and compared. Based on the Lucas–Washburn equation on absorption, the relationship between sorptivity and pore size distribution as well as porosity was established. A damage-representative radius was proposed to simply quantify the variation of pore characteristics of damaged mortar and concrete, and the moisture transport of axial-compression-damaged mortar and concrete could be predicted by summing the contributions to water absorption from the original pore system and the pore-equivalent microcrack system. It is shown that the porosities of mortar and concrete only slightly increase with the damage level, but the sorptivities are sensitive to axial compression damage, i.e., increasing nearly monotonically with the stress level from 0.3326 to 0.3533 mm/min0.5 for damaged mortar specimens (w/c = 0.5) and from 0.1970 to 0.2226 mm/min0.5 for damaged concrete specimens (w/c = 0.5). The increase trend became more apparent for both materials after a threshold of 40–55% of the corresponding ultimate compressive strengths, which is within the service load of structures, indicating that damage should be considered for chloride ions and water transport in concrete in the tidal zone. The predicted moisture diffusivities of damaged mortar and concrete show marginal difference from those of sound materials because the damage-representative radius could be underestimated due to elastic recovery of materials after unloading.

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Relation between water permeability and chloride diffusivity of concrete under compressive stress: Experimental investigation and mesoscale lattice modelling

Cited by 31 publications

References 58 publications

Effect of the Mechanical Load on the Carbonation of Concrete: A Review of the Underlying Mechanisms, Test Methods, and Results

Effect of the Mechanical Load on the Carbonation of Concrete: A Review of the Underlying Mechanisms, Test Methods, and Results

Investigation on Pore Structure and Permeability of Concrete–Rock Interfacial Transition Zones Based on Fractal Theory

Moisture Transport of Axial-Compression-Damaged Mortar and Concrete in Atmospheric Environment

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