The Effects of Corrugated Steel Fiber on the Properties of Ultra-High Performance Concrete of Different Strength Levels

Soloviev, Vadim; Matiushin, Evgenii

doi:10.3390/buildings13102591

Cited by 4 publications

(1 citation statement)

References 61 publications

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“…Additives and admixtures such as fiber, mineral admixtures, temperature inhibitors, and microexpansion agents have been widely used in concrete engineering, significantly improving concrete strength and durability [5][6][7][8][9][10][11]. However, concrete structures exhibit numerous cracks at an early age.…”

Section: Introductionmentioning

confidence: 99%

Study on Temperature Control and Cracking Risk of Mass Concrete Sidewalls with a Cooling-Pipe System

Chen,

Chen

2024

Buildings

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Hydration heat of early-age sidewalls can cause cracks owing to thermal stress, reducing the durability of underground space structures. The heat can be removed by the flowing water in the cooling pipe system. However, the cooling pipe may cause thermal stress due to the temperature gradient in the region adjacent to the cooling pipe, resulting in concrete cracking. To minimize the temperature peak of sidewalls and cracking risks in the region adjacent to the cooling pipe, the crack-distribution characteristics, temperature, and strain evolution of an early-age sidewall with a cooling pipe system are analyzed by concrete temperature and strain tests. Furthermore, a model that accounts for the early-age behavior of concrete and cooling-pipe effects is developed and solved. Finally, the effects of cooling-pipe parameters and ambient temperature on the sidewall’s temperature field and cracking risk are analyzed. The results indicate that the cracks emerge in the first two weeks after concrete pouring; most are vertical, and a few oblique cracks emerge in the wall corner. The tensile stress in the region adjacent to the cooling pipe gradually decreases along the flow direction. Reducing the water temperature and increasing the flow rate reduces the sidewall’s temperature peak and cooling rate. However, they increase the cracking risk in the region adjacent to the cooling pipe. When the flow rate exceeds 0.6 m3/h, further increasing the flow rate does not significantly affect the temperature field. Reducing the distance between cooling pipes reduces the temperature peak, cooling rate, and cracking risk in the region adjacent to the cooling pipe. In high-temperature environments, the cracking risk in the region adjacent to the cooling pipe increases significantly.

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Section: Introductionmentioning

confidence: 99%

Study on Temperature Control and Cracking Risk of Mass Concrete Sidewalls with a Cooling-Pipe System

Chen,

Chen

2024

Buildings

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High-strength fiber-reinforced concrete: assessing the impact of polyvinyl alcohol, glass, and polypropylene fibers on structural integrity and cost efficiency

Labaran,

Atmaca,

Tan

et al. 2024

Discov Civ Eng

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This study delves into the realm of high-strength fibre reinforced concrete (HSFRC), a pivotal material in contemporary construction, with a focus on elucidating its mechanical robustness and durability enhancements facilitated by fibre reinforcement. Previous research on HSFRC has provided mixed results and often neglected the cost implications. However, this study incorporates an array of fibres, encompassing steel, polypropylene, and polyvinyl alcohol, in varied proportions as well as their cost implications to provide a comprehensive evaluation of their impact. Through standardized tests such as compression strength, splitting-tensile strength, flexure strength, water permeability, and ultrasonic pulse velocity tests, alongside an exhaustive cost–benefit analysis, the study uncovers the substantial influence of fiber type and proportion on HSFRC 's properties. Noteworthy findings indicate that both fiber type and fiber ratio can change the strength and durability properties of concrete considerably, however, the use of 1.5% glass fiber gives the best results, in improving the properties of HSC. Moreover, despite the initial higher costs associated with HSFRC production, its protracted durability and diminished maintenance requisites yield substantial long-term economic advantages. Consequently, it is inferred that judicious selection of fiber types and proportions plays a pivotal role in maximizing the performance and cost-effectiveness of HSFRC, thereby advocating for its broader integration within the construction sector. Subsequent research endeavours should concentrate on fine tuning fiber content and types to further elevate HSFRC 's properties.

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The Properties and Behavior of Ultra-High-Performance Concrete: The Effects of Aggregate Volume Content and Particle Size

Matiushin,

Sizyakov,

Shvetsova

et al. 2024

Buildings

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Ultra-High-Performance Concrete (UHPC) and Ultra-High-Performance Fiber-Reinforced Concrete (UHPFRC) represent promising materials in the field of construction, offering exceptional strength and durability, making them ideal for the development of a wide range of infrastructure projects. One of the goals is to better understand the impact of each component of the materials on their key properties in the hardened state. This work examines the effect of the aggregate on the properties of UHPC and UHPFRC. This article provides test results for five compositions without fiber, and five compositions with 2% corrugated steel fiber. Three aggregate concentrations (0, 0.2, and 0.4 m3) and quartz sand with different maximum particle sizes (0.4 and 0.8 mm) were selected. It was found that the mechanical properties of the material, such as the steel fiber bond strength, compressive and axial tensile strength, fracture energy, and critical stress intensity factor, depend on both the concentration of the aggregate and the size of its particles. A novel mix-design parameter was proposed, which reflects the total surface area of the aggregate in the composition (Sagg,tot). The relationships between the parameter Sagg,tot and the mechanical characteristics of UHPC and UHPFRC were established. The steel fiber bond strength, axial tensile strength, and fracture energy-related parameters grew non-linearly when the parameter Sagg,tot increased. When the parameter Sagg,tot was changed from 0 to 12.38 · 103 m2, the fiber bond strength increased by 1.38 times. The axial tensile strength and total fracture energy of the UHPFRC increased by 1.48 and 1.63 times, respectively. The compressive strength changed linearly and increased by 1.12 times. The improvement in the mechanical properties of the material was associated with an increase in the friction force between the fiber and the matrix, which was confirmed by the formation of a greater number of scratches on the surface of the fiber with an increasing value of the parameter Sagg,tot. The deformation characteristics, such as modulus of elasticity, Poisson’s ratio, and drying shrinkage strain, were determined solely by the volumetric concentration of the aggregate, as in conventional concrete. An increase in the aggregate volume content from 0 to 0.4 m3 led to an increase in the modulus of elasticity of 1.41–1.44 times, and a decrease in the ultimate shrinkage strain of almost 2 times. The dependencies obtained in this work can be used to predict the properties of UHPC and UHPFRC, taking into account the type and volume concentration of the aggregate.

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The Effects of Corrugated Steel Fiber on the Properties of Ultra-High Performance Concrete of Different Strength Levels

Cited by 4 publications

References 61 publications

Study on Temperature Control and Cracking Risk of Mass Concrete Sidewalls with a Cooling-Pipe System

Study on Temperature Control and Cracking Risk of Mass Concrete Sidewalls with a Cooling-Pipe System

High-strength fiber-reinforced concrete: assessing the impact of polyvinyl alcohol, glass, and polypropylene fibers on structural integrity and cost efficiency

The Properties and Behavior of Ultra-High-Performance Concrete: The Effects of Aggregate Volume Content and Particle Size

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