Effect of steel fiber on the crack permeability evolution and crack surface topography of concrete subjected to freeze-thaw damage

Zeng, Wei; Ding, Yining; Zhang, Y.; Dehn, Frank

doi:10.1016/j.cemconres.2020.106230

Cited by 70 publications

(14 citation statements)

References 34 publications

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“…Figure 17 shows XRD studies of (a) AC integrated SCC and (b) AC-SF integrated SCC. Te phases detected by XRD analysis are in agreement with previous research [60]. Figure 17(a) depicts the crystallinity changes of conventional cement composite and 25% AC embedded cement composite.…”

Section: Xrd Analysissupporting

confidence: 89%

Concurrent Prospects to Develop Activated Charcoal Reinforced Self-Sensing Cement Composites for Structural Health Monitoring Applications

Dinesh¹,

Suji

Pichumani

2023

Structural Control and Health Monitoring

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This research examines the electromechanical characteristics of self-sensing cement composite (SCC) containing activated charcoal (AC) at various concentrations (5%, 10%, 15%, 20%, and 25%). The developed composite is placed in various zones in the beam to monitor beam behaviour, as well as in the column center to monitor column deflection. The research reveals that AC reduced the compressive strength and resistivity of cement composites by generating local hydration and carbon accumulation. The performance index approach optimizes AC concentrations at 25% and 20% without and with 10% silica fume (SF), respectively. The embedded SCC has monitored the deflection of beams and columns with a maximum correlation between electrical resistivity and deflection at 99% and 96%, respectively. According to the findings, the AC can generate SCC, which might be utilized to monitor the deflection of beams and columns.

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Section: Xrd Analysissupporting

confidence: 89%

Concurrent Prospects to Develop Activated Charcoal Reinforced Self-Sensing Cement Composites for Structural Health Monitoring Applications

Dinesh¹,

Suji

Pichumani

2023

Structural Control and Health Monitoring

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“…According to the change law of two parameters, the FTCs stiffness damage of concrete with less than 30 FTCs declines most seriously for different freezing temperatures. From the calculation results of the fitting surface, the first degradation of mechanical properties is stiffness damage, and then is the strength damage, which is consistent with the test results of concrete under FTCs (Zeng et al 2020;Zhang et al 2021). Moreover, the stiffness damage of concrete with FTCs gradually tends to limit after more than 50 FTCs, and the strength damage gradually tends to be gentle with increasing FTCs.…”

Section: Ftcs Damage Distribution Behavior Of Concrete Under Differen...supporting

confidence: 80%

Multi-scale Computational Modeling on the Equivalent Element Method for Freeze-thaw Damage of Concrete

Peng

Qiu

Meng

2022

ACT

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Frost damage is one of the main reasons for the decay of concrete in cold regions, which is affected by many factors such as freezing temperature, number of freeze-thaw cycles (FTCs), pore and aggregate structure, and the FTCs damage in concrete presents a certain distribution characteristic. In view of this, a systematic prediction method for FTCs damage distribution was established by the multi-scale method. Firstly, the FTCs damage behavior was simulated by the microcalculation method. Subsequently, the micro-meso-macro multi-step equivalent method was established for the description of FTCs damage, and the equivalent element of concrete under FTCs was established. The calculation results of the equivalent model show that the characteristic element size should be set as 10 mm to 20 mm, which can satisfy the requirements of the heterogeneous characteristics of FTCs damage and Weibull distribution at the same time. Meanwhile, the effects on the FTCs number and freezing temperature of the FTCs damage distribution were discussed, and the effectiveness of the equivalent element was verified by comparing it with the test results, which the equivalent calculation model can well describe the heterogeneous distribution of FTCs damage.

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“…Steel fiber–reinforced concrete offers a rough cracked surface which helps to minimize the water permeability. 63 There was a patent correlation between incoming water and outgoing water. This relation was varying according to the fiber content.…”

Section: Test Results and Discussionmentioning

confidence: 99%

Effect of fiber dosage on water permeability using a newly designed apparatus and crack monitoring of steel fiber–reinforced concrete under direct tensile loading

Hussain

Zhang

Hussain

et al. 2021

Structural Health Monitoring

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Cracks in concrete structures have always been the main reason to allow the aggressive and harmful agents to infringe the concrete resulting in its deterioration and decreasing lifespan. In the present study, the water permeability of the cracked concrete has been investigated. The consequences of cracking on the durability and endurance of concrete were also studied. A state-of-the-art permeability setup was designed to measure the water flow in normal and fiber-reinforced concrete under direct tensile loading. The setup was convenient for determining the average stress applied to the concrete specimens and simultaneously the maximum crack opening. Furthermore, the effect of fiber content on the cracking geometry (tortuosity and roughness) was evaluated by incorporating the coordinate data of the cracked surface using a 3D sensor-based laser scanning data acquisition system. To understand the effect of fiber content on the cracking geometry (tortuosity and roughness), the acquired data were then analyzed. Test results show that the designed setup is suitable to measure the water permeability under direct tensile loading. Water permeability decreased upon increasing the steel fiber dosage. Besides, the results show that tortuosity decreased while surface roughness increased with the fiber dosage increment. Promising preliminary results indicated that there is an inverse relationship between surface roughness and water permeability. The crack sensing setup successfully monitored the crack.

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Effect of steel fiber on the crack permeability evolution and crack surface topography of concrete subjected to freeze-thaw damage

Cited by 70 publications

References 34 publications

Concurrent Prospects to Develop Activated Charcoal Reinforced Self-Sensing Cement Composites for Structural Health Monitoring Applications

Concurrent Prospects to Develop Activated Charcoal Reinforced Self-Sensing Cement Composites for Structural Health Monitoring Applications

Multi-scale Computational Modeling on the Equivalent Element Method for Freeze-thaw Damage of Concrete

Effect of fiber dosage on water permeability using a newly designed apparatus and crack monitoring of steel fiber–reinforced concrete under direct tensile loading

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