Influence of Hybrid Fiber Reinforcement on Mechanical Properties and Autogenous Shrinkage of an Ecological UHPFRCC

Ma, Rui; Guo, Liping; Ye, Shaoxiong; Sun, Wei; Liu, Jiaping

doi:10.1061/(asce)mt.1943-5533.0002650

Cited by 37 publications

(14 citation statements)

References 46 publications

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“…There are different standards for testing the flexural tensile strength of UHPC. The most commonly used standards are the Chinese [ 107 ] and European cement standards [ 49 ] and ASTMC1609 [ 108 ]. In ASTMC1609, the sample size requirement is at least three times the maximum fiber length.…”

Section: Resultsmentioning

confidence: 99%

Effect of Steel Fibers on Tensile Properties of Ultra-High-Performance Concrete: A Review

Du,

Yu,

Qiu

et al. 2024

Materials

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Ultra-high-performance concrete (UHPC) is an advanced cement-based material with excellent mechanical properties and durability. However, with the improvement of UHPC’s compressive properties, its insufficient tensile properties have gradually attracted attention. This paper reviews the tensile properties of steel fibers in UHPC. The purpose is to summarize the existing research and to provide guidance for future research. The relevant papers were retrieved through three commonly used experimental methods for UHPC tensile properties (the direct tensile test, flexural test, and splitting test), and classified according to the content, length, type, and combination of the steel fibers. The results show that the direct tensile test can better reflect the true tensile strength of UHPC materials. The tensile properties of UHPC are not only related to the content, shape, length, and hybrids of the steel fibers, but also to the composition of the UHPC matrix, the orientation of the fibers, and the geometric dimensions of the specimen. The improvement of the tensile properties of the steel fiber combinations depends on the effectiveness of the synergy between the fibers. Additionally, digital image correlation (DIC) technology is mainly used for crack propagation in UHPC. The analysis of the post-crack phase of UHPC is facilitated. Theoretical models and empirical formulas for tensile properties can further deepen the understanding of UHPC tensile properties and provide suggestions for future research.

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Section: Resultsmentioning

confidence: 99%

Effect of Steel Fibers on Tensile Properties of Ultra-High-Performance Concrete: A Review

Du,

Yu,

Qiu

et al. 2024

Materials

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“…Meng et al [ 109 ], a foreign scholar, found that PVA fiber could significantly reduce the autogenous shrinkage of the material. Later, Ma et al [ 110 ] found that the autogenous shrinkage rate of high-performance concrete decreased with the increase in the content of carbon fiber. Miao et al [ 111 ] conducted a drying shrinkage experiment by changing the content of PVA fiber.…”

Section: Drying Shrinkagementioning

confidence: 99%

Durability Performance Investigation for Engineering Fiber Cementitious Composites (ECC): Review

Zhang

2023

Polymers

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Engineered Cementitious Composite (ECC) is currently receiving more and more attention due to its excellent tensile strain hardening and multiple cracking properties. However, due to the high material cost of polyvinyl alcohol (PVA) fiber and quartz sand, its widespread promotion and application in the market are limited. Therefore, scholars at home and abroad have conducted many active studies on improving ECC. This paper summarizes the development history and research status of ECC materials, summarizes the current domestic and foreign researchers’ improvement methods for ECC materials, and classifies the improvement methods into three categories: the type of fiber variation, the water-binder ratio variation and adding mineral admixtures, the influences of the above three factors on the mechanical properties and durability of ECC, such as compressive and flexural resistance, are described in detail, and the mechanism of action is explained. Furthermore, this paper introduces the most common uniaxial compression and uniaxial tension constitutive models of ECC. They are briefly classified and evaluated, hoping to help readers’ numerical simulation analysis. Finally, some suggestions for ECC research, such as the proportion of water binders and the application of composite fibers, require further research.

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“…Ma et al 12 investigated the effects of a combination of straight steel fibers with hooked steel and cellulose fibers. The total fiber content was maintained at 2.0% (by volume).…”

Section: Introductionmentioning

confidence: 99%

Flexural response characteristics of ultra‐high performance concrete made with steel microfibers and macrofibers

Karim

Shafei

2021

Structural Concrete

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Ultra‐high performance concrete (UHPC) is increasingly used for various engineering applications, owing to its superior strength properties. Such properties, however, can be accompanied by workability issues, especially if the dosage of steel fibers is significantly increased. As a potential solution, this study explored the use of a combination of steel microfibers and macrofibers through a holistic experimental testing program. This was to understand the effects of steel fiber combinations on the workability and flexural strength of various UHPC mixtures. The microfibers were investigated for five different dosages from 1.0% to 3.0% (with an increment of 0.5%). In parallel, two mixtures were prepared with a 2.0% dosage of macrofibers in the form of twisted wire and hooked fibers. At the next stage, six additional mixtures were prepared with a combination of microfibers and macrofibers of various dosages. Further to the measurements extracted from the workability and flexural strength tests, digital image correlation (DIC) analyses were employed to obtain firsthand information about the widths and depths of cracks observed in the flexural specimens tested under an increasing load. The outcome of this study showed how a combination of microfibers and macrofibers can contribute to improving the flexural response characteristics of UHPC, especially without having to increase the dosage of steel fibers to the ranges that can adversely affect the mixture's workability.

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Influence of Hybrid Fiber Reinforcement on Mechanical Properties and Autogenous Shrinkage of an Ecological UHPFRCC

Cited by 37 publications

References 46 publications

Effect of Steel Fibers on Tensile Properties of Ultra-High-Performance Concrete: A Review

Effect of Steel Fibers on Tensile Properties of Ultra-High-Performance Concrete: A Review

Durability Performance Investigation for Engineering Fiber Cementitious Composites (ECC): Review

Flexural response characteristics of ultra‐high performance concrete made with steel microfibers and macrofibers

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