Sensitivity Analysis of Stochastic Calculation of SCC Regarding Aggressive Environment

Lehner, Petr; Horňáková, Marie; Hrabová, Kristýna

doi:10.3390/ma14226838

Cited by 9 publications

(8 citation statements)

References 49 publications

(53 reference statements)

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“…These observations of a decrease in compressive strength with steel fibre addition are in line with the results of other scientists. Lehner et al [15] obtained lower resistance of fibre-reinforced concrete for higher fibre content. In literature, the decrease or increase in compressive strength with the addition of fibres was observed.…”

Section: Compressive Strengthmentioning

confidence: 94%

“…Due to these properties, fibre-reinforced concrete found its application in the construction of building, bridges, tunnels, and heavy-duty pavement [4]. The steel fibre reinforced concretes (SFRC) are the most widely used [12][13][14][15]. Shi et al [16] presented the research and evaluated the seismic performance of beam-column joints in steel fibre reinforced high-strength concrete (SFRHC).…”

Section: Introductionmentioning

confidence: 99%

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Effect Steel Fibre Content on the Load-Carrying Capacity of Fibre-Reinforced Concrete Expansion Anchor

2021

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The article presents the pull-out strength tests carried out on M10 expansion anchors in non-cracked and cracked concrete with a crack width cw = 0.30 mm. The breaking loads and the average pull-out strength of anchors in fibre-reinforced concrete substrates were determined. Fibre content ratios of 15, 30 and 50 kg/m3 were used. In addition, two different classes of concrete (C20/25 and C50/60) were tested. The addition of steel fibres caused a decrease in the pull-out strength by 5% for non-cracked concrete of C20/25 class and fibre content up to 30 kg/m3 and a further 7% for the remaining specified dosage. While for concrete of the C50/60 class, it a decrease in the pull-out strength of up to 20% was observed. For cracked concrete class C20/25 with crack initiation cw = 0.30 mm, the reduction was from 9% to 16% in relation to non-cracked concrete and a maximum of 18% for the fibre content of 50 kg/m3. The difference between the tensile load capacity of C50/60 class cracked and non-cracked concrete was lower than 5% and fell within the measurement error.

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Section: Compressive Strengthmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Effect Steel Fibre Content on the Load-Carrying Capacity of Fibre-Reinforced Concrete Expansion Anchor

2021

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“…Self-compacting concrete (SCC) is a new composite material developed based on ordinary concrete; with its gravity, it can be compacted and formed, which has excellent construction performance [1][2][3][4][5]. In recent years, it has been widely used in many projects [6][7][8][9], which has become a new direction for the development of concrete materials.…”

Section: Introductionmentioning

confidence: 99%

Study on Ultrasonic Nondestructive Testing of Self-Compacting Concrete under Uniaxial Compression Test

Sun

Wang

2022

Materials

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To study the variation law of ultrasonic parameters of self-compacting concrete before and after damage under uniaxial compression test conditions, the C30 self-compacting concrete blocks stored for 7 days and 28 days were subjected to ultrasonic nondestructive testing, and the variation law of the sound time, amplitude, and sound velocity before and after the damage of self-compacting concrete blocks was emphatically analyzed. The concrete acoustic detection software was introduced to judge and analyze the abnormal values of the parameters of each measuring point, and the defect distribution map of each test block was obtained. The results showed that after curing the self-compacting concrete test block for 7 days and 28 days, the average value of sound time before and after the failure of each measuring point of the test block is small, and the average value of sound time before the failure is less than that after; the average amplitude after failure is smaller than that before failure, and the amplitude of some measuring points will be smaller than that before. The average sound velocity after failure is less than that before failure, and the internal defects appear and the structure is not dense. This study provides a theoretical basis for the application of ultrasonic detection technology in the field of self-compacting concrete and also provides a practical basis for the stability monitoring and failure warning of self-compacting concrete.

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“…However, concrete is a multiphase material composed of aggregate, cement paste, ITZ and pores [14,15]. The comprehensive Materials 2022, 15, 4171 2 of 13 influence of each component on chloride ion diffusion forms the macroscopic physical phenomenon, which leads to the randomness of the chloride diffusion coefficient [16]. Therefore, it is particularly important to study the effects of different components on the diffusion properties of chloride ions from the meso-level.…”

Section: Introductionmentioning

confidence: 99%

Effect of Interface Transition Zone and Coarse Aggregate on Microscopic Diffusion Behavior of Chloride Ion

et al. 2022

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Concrete is a multiphase composite material composed of coarse aggregate, cement mortar, and interface transition zone (ITZ). It is of great significance to study the effect of ITZ and coarse aggregate on chloride microscopic diffusion behavior for predicting the service life of reinforced concrete (RC) structures. By introducing the random distribution function, a random coarse aggregate model considering the randomness of the thickness of the ITZ was established. Furthermore, a two-dimensional (2D) chloride ion diffusion mesoscopic model was developed by specifying different diffusion properties for different phase materials of concrete. Moreover, the effects of coarse aggregate rate, ITZ thickness, and ITZ diffusion property on chloride ion diffusion behavior were investigated in this paper. The research showed that the aggregate has hindrance and agglomeration action on chloride ion diffusion. Although the volume content of the ITZ was very small, less than 0.2% of the total volume of concrete, the effect of the ITZ on the chloride diffusion in concrete cannot be ignored. More importantly, the mechanism of promoting chloride diffusion in the ITZ was revealed through the chloride diffusion trajectory. The research revealed the transmission mechanism of chloride ions in the meso-structure of concrete and provides theoretical support for the design of RC structures in coastal areas.

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Sensitivity Analysis of Stochastic Calculation of SCC Regarding Aggressive Environment

Cited by 9 publications

References 49 publications

Effect Steel Fibre Content on the Load-Carrying Capacity of Fibre-Reinforced Concrete Expansion Anchor

Effect Steel Fibre Content on the Load-Carrying Capacity of Fibre-Reinforced Concrete Expansion Anchor

Study on Ultrasonic Nondestructive Testing of Self-Compacting Concrete under Uniaxial Compression Test

Effect of Interface Transition Zone and Coarse Aggregate on Microscopic Diffusion Behavior of Chloride Ion

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