Chloride binding and diffusion of slag blended concrete mixtures

Mapa, Dhanushika Gunatilake; Zhu, Hai; Nosouhian, Farzaneh; Shanahan, Natallia; Riding, Kyle A.; Zayed, A.

doi:10.1016/j.conbuildmat.2023.131584

Cited by 9 publications

(3 citation statements)

References 40 publications

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“…However, it is crucial to emphasize that the compressive strength values at 3, 7, and 28 days in the salty curing environment were considerably lower than those observed under similar normal curing periods. This notable difference can be attributed to the presence of salts, particularly chloride ions [ 41 ]. These salts have the potential to interfere with the formation of C-S-H gel, a critical factor for the strength development of concrete.…”

Section: Resultsmentioning

confidence: 99%

“…The results unveiled consistent trends across both test methods. In another study [ 41 ], ASTM C1556 is utilized to evaluate chloride binding and diffusion in slag-blended concrete mixtures. The findings of this investigation indicated that the incorporation of ground-granulated blast furnace slags enhanced chloride binding and reduced chloride diffusivity.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Carbon Nanotubes on Chloride Diffusion, Strength, and Microstructure of Ultra-High Performance Concrete

Rafieizonooz,

Kim,

Kim

et al. 2024

Materials

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This study delved into the integration of carbon nanotubes (CNTs) in Ultra-High Performance Concrete (UHPC), exploring aspects such as mechanical properties, microstructure analysis, accelerated chloride penetration, and life service prediction. A dispersed CNT solution (0.025 to 0.075 wt%) was employed, along with a superplasticizer, to ensure high flowability in the UHPC slurry. In addition, the combination of high-strength functional artificial lightweight aggregate (ALA) and micro hollow spheres (MHS) was utilized as a replacement for fine aggregate to not only reduce the weight of the concrete but also to increase its mechanical performance. Experimental findings unveiled that an increased concentration of CNT in CNT1 (0.025%) and CNT2 (0.05%) blends led to a marginal improvement in compressive strength compared to the control mix. Conversely, the CNT3 (0.075%) mixture exhibited a reduction in compressive strength with a rising CNT content as an admixture. SEM analysis depicted that the heightened concentration of CNTs as an admixture induced the formation of nanoscale bridges within the concrete matrix. Ponding test results indicated that, for all samples, the effective chloride transport coefficient remained below the standard limitation of 1.00 × 10−12 m2/s, signifying acceptable performance in the ponding test for all samples. The life service prediction outcomes affirmed that, across various environmental scenarios, CNT1 and CNT2 mixtures consistently demonstrated superior performance compared to all other mixtures.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Carbon Nanotubes on Chloride Diffusion, Strength, and Microstructure of Ultra-High Performance Concrete

Rafieizonooz,

Kim,

Kim

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…In addition to external loads, factors such as dry-wet cycles [12][13][14][15], climate changes [16], concrete additives [17][18][19], concrete coatings [20,21], etc., have a significant impact on the chloride ion diffusion of concrete and the durability of reinforced concrete in marine structures.…”

Section: Introductionmentioning

confidence: 99%

Research on the influence of concrete damage in wharf structures under fatigue loads on chloride ion diffusion

xu,

Zheng,

Hou

et al. 2024

Preprint

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In the marine environment, harbor structures are prone to fatigue damage due to long-term berthing load, accelerating chloride erosion and leading to steel corrosion, thus significantly reducing the durability and service performance of reinforced concrete structures. To investigate the influence of fatigue damage on chloride ion diffusion, this paper simulated the damage degradation process of structures under fatigue load and chloride ion erosion through experiments. The damage caused by fatigue load was defined by ultrasonic method, and the study investigated the effects of different stress levels and loading cycles on chloride ion transport. The chloride ion diffusion concentration under different damage conditions was predicted by numerical simulation. The results indicate that the fatigue load leads to the increase of load level and the increase of chloride ion content at the same depth. The increase of loading times accelerates the penetration rate, which is positively correlated with the chloride ion diffusivity. The chloride ion diffusion coefficient of concrete exhibits an exponential relationship with fatigue damage levels. The numerical simulation results are consistent with the experimental results, validating the feasibility of establishing a correspondence between thermodynamic diffusion and chloride ion diffusion parameters using the analogy method. This paper provides reliable support for the performance assessment and maintenance of reinforced concrete structures in marine environments.

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Investigation on chloride resistance of high-volume slag low-carbon cement-based materials with crystalline admixture under seawater

He,

Yu,

et al. 2024

J Mater Sci

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Chloride binding and diffusion of slag blended concrete mixtures

Cited by 9 publications

References 40 publications

Effect of Carbon Nanotubes on Chloride Diffusion, Strength, and Microstructure of Ultra-High Performance Concrete

Effect of Carbon Nanotubes on Chloride Diffusion, Strength, and Microstructure of Ultra-High Performance Concrete

Research on the influence of concrete damage in wharf structures under fatigue loads on chloride ion diffusion

Investigation on chloride resistance of high-volume slag low-carbon cement-based materials with crystalline admixture under seawater

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