Electrically driven ionic transport in the RCM and RIM: Investigations based on experiments and numerical simulations

Liu, Jun; Liao, Chenyue; Jin, Hesong; Jiang, Zhilu; Xie, Renbin; Tang, Luping

doi:10.1016/j.conbuildmat.2022.127331

Cited by 8 publications

(2 citation statements)

References 44 publications

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“…The experimental setup for rapid chloride migration (RCM) test was shown in Figure 4 [22], which was carried out according to Chinese standard GB/T 50082-2009. The mixes The experimental setup for rapid chloride migration (RCM) test was shown in Figure 4 [22], which was carried out according to Chinese standard GB/T 50082-2009. The mixes for the RCM test were firstly cast into Φ100 mm × 50 mm molds and the test was performed on the sample cured for 28 days.…”

Section: Test Methodsmentioning

confidence: 99%

Cement-Based Materials Modified by Colloidal Nano-Silica: Impermeability Characteristic and Microstructure

Wang

et al. 2022

Nanomaterials

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Colloidal nano-silica (CNS) was used to improve the mechanical and impermeability characteristics of mortar in this study. The samples were prepared with 0%, 1%, 2% and 3% (solid content) CNS addition. The mechanical strength and permeability of each mixture was studied, and the mechanism behind was revealed by hydration heat evolution, XRD, DSC-DTG, 29Si MAS-NMR and SEM-EDS analysis. The compressive strength and impermeability characteristics of mortars incorporating CNS were significantly improved. The experimental results demonstrated that the incorporation of CNS promoted the early hydration process of cement, thus increasing the polymerization degree of hydrated calcium silicate, decreasing the porosity, and improving the microstructure of mortar. Furthermore, 3% CNS decreased the Ca/Si ratio of the interfacial transition zone (ITZ) from 3.18 to 2.22, thus the enrichment of CH was reduced and the density and strength were improved. This was mainly because of the high pozzolanic activity of CNS, which consumed plenty of calcium hydroxide and converted to C-S-H. Besides, nanoscale CNS and C-S-H particles filled the voids between hydrates, thus refining the pore size, increasing the complexity of pores, and improving the microstructure of ITZ which contributed to the improvement of the impermeability.

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Section: Test Methodsmentioning

confidence: 99%

Cement-Based Materials Modified by Colloidal Nano-Silica: Impermeability Characteristic and Microstructure

Wang

et al. 2022

Nanomaterials

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“…It should be noted that both models assume constant boundary conditions: surface chloride concentration, water saturation, relative humidity, and temperature, while chlorides penetrate into concrete by diffusion. Therefore, the effects of climate change, seasonal and long-term weather variations, as well as wetting-drying cycles, effects of precipitation, and other types of chloride transport are not considered, although their influence can be significant [46,[51][52][53]. However, the focus of the analysis is on demonstrating the impact of cracks on chloride concentration in cracked and the local uncracked concrete.…”

Section: Service Life Predictionmentioning

confidence: 99%

Assessment of Performance Indicators of a Large-Span Reinforced Concrete Arch Bridge in a Multi-Hazard Environment

et al. 2022

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Assessment of a single bridge and management system for all bridges in the network is still a major challenge, although much research has been carried out and implemented in existing networks over the last four decades. This paper presents a case study of a long-span arch bridge, the Maslenica Motorway Bridge, located in a multi-hazard maritime environment. Although special attention was paid to durability during design, the bridge required repair after 20 years of operation. The analysis includes an overview of the design project, structural health monitoring during construction and operation, numerous laboratory and in-situ testing, numerical analysis of structural capacity and remaining service life, and meteorological monitoring of the bridge site. A new approach to bridge assessment is presented that includes not only a deterioration index, but five groups of key performance indicators: (1) safety, reliability, and security; (2) availability and maintainability; (3) costs; (4) the environment; and (5) health and politics. Incorporating all available data and evaluating various aspects of bridge performance provides greater insight into the condition of the bridge, not only at the structure level but also at the network level. The method is applied to the reinforced concrete arch bridge in a harsh maritime environment and evaluation is provided based on the comprehensive data analysis. The key performance assessment procedure and lessons learned from this case study can be applied to a wide range of structures.

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Microstructure and macro properties of sustainable alkali-activated fly ash mortar with various construction waste fines as binder replacement up to 100%

Liu

Wu²,

Yao³

et al. 2022

Cement and Concrete Composites

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Electrically driven ionic transport in the RCM and RIM: Investigations based on experiments and numerical simulations

Cited by 8 publications

References 44 publications

Cement-Based Materials Modified by Colloidal Nano-Silica: Impermeability Characteristic and Microstructure

Cement-Based Materials Modified by Colloidal Nano-Silica: Impermeability Characteristic and Microstructure

Assessment of Performance Indicators of a Large-Span Reinforced Concrete Arch Bridge in a Multi-Hazard Environment

Microstructure and macro properties of sustainable alkali-activated fly ash mortar with various construction waste fines as binder replacement up to 100%

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