Chloride permeability of concrete subjected to freeze-thaw damage

Saito, Mitsuru; Ohta, Minoru; Ishimori, Hiroshi

doi:10.1016/0958-9465(94)90035-3

Cited by 22 publications

(11 citation statements)

References 4 publications

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“…ordinary concrete with high chloride permeability. 10,11 For FT resistance, newly developed basalt-fiberreinforced-polymer (BFRP) bars and epoxy-coated steel bars have significant advantages over conventional steel, which is prone to corrosion-induced damage that leads to the failure of the bond between the bars and concrete in reinforced concrete (RC) and has an adverse effect on the long-term durability of the RC structure. [12][13][14][15] Using a novel wedge splitting test, Wang and Petru ˚16 experimentally determined that the fracture energy of the epoxy-concrete interface decreases exponentially with the number of FT cycles.…”

Section: Introductionmentioning

confidence: 99%

Bond durability of basalt‐fiber‐reinforced‐polymer bars embedded in lightweight aggregate concrete subjected to freeze–thaw cycles

Deng

Wang

Sun

et al. 2021

Structural Concrete

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In recent years, basalt-fiber-reinforced-polymer (BFRP) bars have become popular to replace steels. However, little is known about the performance of BFRP bars inserted in lightweight aggregate concrete (LWAC), especially the bonding performance under freeze-thaw (FT) cycles. In this study, a bond strength test was conducted for BFRP bars embedded in LWAC after FT cycles. BFRP bars, epoxy-coated bars, and steels were tested for comparison purposes. The test parameters are the bar type, compressive strength of the LWAC, and FT cycles; 108 specimens were subjected to 0, 15, 30, and 50 FT cycles. Moreover, the bond strength models of the three types of bars were fitted to LWAC. The test results prove that the number of FT cycles significantly affects the bonding performance of the bar embedded in LWAC. The results also show that the bond strength prediction of the fitting model considering the FT cycle effect is consistent with the experimental results. K E Y W O R D S basalt-fiber-reinforced-polymer bars, bond, epoxy-coated steel bars, freeze-thaw cycles, lightweight aggregate concrete

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Section: Introductionmentioning

confidence: 99%

Bond durability of basalt‐fiber‐reinforced‐polymer bars embedded in lightweight aggregate concrete subjected to freeze–thaw cycles

Deng

Wang

Sun

et al. 2021

Structural Concrete

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“…It is acknowledged that due to the frost-induced damage mechanical properties are considerably reduced [5]. Furthermore, cyclic water freezing impacts the material transport properties [6]. The main objective of the investigation is to analyze the ice-induced deterioration of cement-based materials in a accelerated durability tests.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of frost induced damage of cement mortar

2019

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Questions connected to influence of frost degradation on microstructure and physical properties of water saturated cement mortars and their resistance to cyclic water freezing are the objectives of research. The main aim of the investigation is to analyze the ice-induced deterioration of cement mortars with different water/cement ratios (w/c=0.50 and 0.40) in a accelerated durability tests. The changes of pore size distribution and water absorption coefficient are investigated by means of mercury intrusion porosimetry and capillary absorption test. Additionally, the analysis of the impact of drying temperature (40°C, 60°C, 80°C and 105°C) on the microstructure is introduced.The performed tests enabled to estimate that the destruction of the cement matrix and the range of observed changes depend on the initial pore size distribution and their volume in the cement matrix. It is also established that the increase of transport properties is correlated with the change of pore size distribution. The obtained results allow to conclude a decrease of content of small pores (up to 150nm) and increase of larger pores for mortar with w/c=0.50. Application of superplasticizer, which resulting in reduction of water to cement ratio up to 0.40, allows to obtained resistant to 150 frost cycles cement mortar.

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“…There are many papers about chloride penetration into concrete in common climate, but only a few researches about chloride ingress into concrete while suffering freeze-thaw cycles [8][9][10][11][12]. For these few researchers, they mainly focus on comparing the penetration resistance of different type of concrete, but not the prediction method or model of chloride ingress into concrete, which is more significant for durability design such as predicting the time of pitting corrosion of reinforcing steel.…”

Section: Introductionmentioning

confidence: 99%

Time Dependent Chloride Diffusion Coefficient in Concrete in Cold Regions

Chen¹,

Song²,

Liu³

2015

Proceedings of the 2015 International Conference on Materials, Environmental and Biological Engineering

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Chloride and freeze-thaw cycles are two main factors which cause deterioration of reinforced concrete (RC) structure in the cold regions. In this paper, the process of chloride ingress into concrete exposed to freeze-thaw cycles is experimentally researched. From the experimental results, it appears that freeze-thaw cycles make the effective diffusion coefficient become bigger. Based on the experimental data, the concept of developing coefficient was defined to obtain the evolution equation of effective diffusion coefficient. Together with considering the effect of aging of concrete on effective diffusion coefficient, the time dependent diffusion coefficient of concrete in cold regions was obtained.

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Chloride permeability of concrete subjected to freeze-thaw damage

Cited by 22 publications

References 4 publications

Bond durability of basalt‐fiber‐reinforced‐polymer bars embedded in lightweight aggregate concrete subjected to freeze–thaw cycles

Bond durability of basalt‐fiber‐reinforced‐polymer bars embedded in lightweight aggregate concrete subjected to freeze–thaw cycles

Experimental investigation of frost induced damage of cement mortar

Time Dependent Chloride Diffusion Coefficient in Concrete in Cold Regions

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