Durability of ultra-high performance concrete in tension under cold weather conditions

Zhou, Zhidong; Qiao, Pizhong

doi:10.1016/j.cemconcomp.2018.08.019

Cited by 57 publications

(12 citation statements)

References 30 publications

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“…Due to freeze-thaw cycle, the pore cracked and the microcracks generated provide channels for further penetration of chloride ions. Therefore, the coupling effect of freeze-thaw cycle and chloride ion erosion has more aggressive impact on the durability of RPC [2,39]. After 800 freeze-thaw cycles, the compressive strength loss rate of BFRPC under two freeze-thaw conditions is less than 20% and the difference in compressive strength loss rate of BFRPC under two freeze-thaw conditions is less than 0.9%.…”

Section: Compressive Strength Lossmentioning

confidence: 99%

Mechanical Properties and Freeze–Thaw Durability of Basalt Fiber Reactive Powder Concrete

Liu

Zhu

et al. 2020

Applied Sciences

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Basalt fiber has a great advantage on the mechanical properties and durability of reactive powder concrete (RPC) because of its superior mechanical properties and chemical corrosion resistance. In this paper, basalt fiber was adopted to modified RPC, and plain reactive powder concrete (PRPC), basalt fiber reactive powder concrete (BFRPC) and steel fiber reactive powder concrete (SFRPC) were prepared. The mechanical properties and freeze–thaw durability of BFRPC with different basalt fiber contents were tested and compared with PRPC and SFRPC to investigate the effects of basalt fiber contents and fiber type on the mechanical properties and freeze–thaw durability of RPC. Besides, the mass loss rate and compressive strength loss rate of RPC under two freeze–thaw conditions (fresh-water freeze–thaw and chloride-salt freeze–thaw) were tested to evaluate the effects of freeze–thaw conditions on the freeze–thaw durability of RPC. The experiment results showed that the mechanical properties and freeze–thaw resistance of RPC increased as the basalt fiber content increase. Compared with the fresh-water freeze–thaw cycle, the damage of the chloride-salt freeze–thaw cycle on RPC was great. Based on the freeze–thaw experiment results, it was found that SFRPC was sensitive to the corrosion of chloride salts and compared with the steel fiber, the improvement of basalt fiber on the freeze–thaw resistance of RPC was great.

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Section: Compressive Strength Lossmentioning

confidence: 99%

Mechanical Properties and Freeze–Thaw Durability of Basalt Fiber Reactive Powder Concrete

Liu

Zhu

et al. 2020

Applied Sciences

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“…e e ects of ion di usion and chemical reaction were also discussed, and a mechanical analysis was performed. Zhou and Qiao [6] studied the tensile properties and elastic modulus of ultrahigh performance concrete (UHPC) under accelerated freeze-thaw cycles. Six series of UHPC specimens were tested by a well-designed direct tensile test (DTT) and the complete tensile stress-strain response was obtained.…”

Section: -mentioning

confidence: 99%

Variation Pattern of the Stress‐Strain Curve of Concrete under Multifactor Coupling

Xie

2022

Advances in Civil Engineering

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The air shafts of coal mines contain solid, liquid, and gaseous substances that corrode concrete under conditions of relatively high temperature and humidity. The coupling of various factors decreases the concrete strength and thus the bearing capacity of the air shaft lining. In this study, concrete corrosion tests were carried out by simulating the complex environment of a coal mine air shaft lining to study the variation in the concrete stress-strain curve. For corroded concrete specimens subjected to very low stress, the microcracks and holes were closed, generating a large deformation, indicating severe concrete corrosion. The longer the corrosion time was, the gentler the initial slope of the curve. Finally, the uniaxial compression constitutive model of corroded concrete was established based on the Weibull distribution of three parameters, and the model curve was compared with the experimental curve. This model can not only predict the change of the stress-strain curve of high-strength concrete in a coal mine air shaft environment but also provide theoretical reference for the application of high-strength concrete in an air shaft environment.

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“…Investigations (Graybeal and Tanesi, 2007;Liu et al, 2003) further found that the relative dynamic moduli of elasticity of UHPC remained 96% of that of virgin samples after being subjected to two times ASTM C666 F-T cycles which is applied for normal concrete. However, a recent study on durability of UHPC subjected to F-T action indicated that the absorbed energy of UHPC under the destructive direct tension test at 1500 F-T cycles only remains about 61% (Zhou and Qiao, 2018), showing the material damage and degradation due to F-T action did accumulate in the UHPC samples. While most of research efforts of UHPC subjected to F-T action have mainly focused on experimental testing at macro-scale, there is a pressing need to establish fundamental understanding of the relationship between the microstructure and F-T resistance properties of UHPC at micro-scale.…”

Section: Introductionmentioning

confidence: 97%

Micro-CT-based micromechanics and numerical homogenization for effective elastic property of ultra-high performance concrete

Luo

Liu

Qiao

et al. 2019

International Journal of Damage Mechanics

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A computational homogenization model using microstructures obtained from X-ray micro-CT is developed to estimate the porosity-based elastic properties of ultra-high performance concrete under freeze–thaw action. The model is transformed directly from micro-CT which is capable of reflecting realistic distribution of porosity and heterogeneities inside the ultra-high performance concrete. Factors are taken into consideration, including the determination of representative volume element, the position and numbers of representative volume element cubes, fiber orientation, image resolution, applied filter, and pore distribution. The relationship between the material internal structure and freeze–thaw resistance is studied at micro-scale. The volume-averaged homogenization approach is applied to calculate the effective properties of the ultra-high performance concrete which are compared with experimental data. It is demonstrated that the proposed model provides an effective tool to evaluate the elastic properties of the ultra-high performance concrete based on microstructural characterization data.

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Durability of ultra-high performance concrete in tension under cold weather conditions

Cited by 57 publications

References 30 publications

Mechanical Properties and Freeze–Thaw Durability of Basalt Fiber Reactive Powder Concrete

Mechanical Properties and Freeze–Thaw Durability of Basalt Fiber Reactive Powder Concrete

Variation Pattern of the Stress‐Strain Curve of Concrete under Multifactor Coupling

Micro-CT-based micromechanics and numerical homogenization for effective elastic property of ultra-high performance concrete

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