Investigation on reinforcement of aligned steel fiber on flexural behavior of cement-based composites using acoustic emission signal analysis

Mu, Ru; Xing, Peng; Yu, Junchao; Wei, Luansu; Zhao, Qing; Qing, Longbang; Zhou, Jian; Tian, Wen‐Ling; Gao, Shuling; Zhao, Xiangen; Wang, Xiaowei

doi:10.1016/j.conbuildmat.2018.12.084

Cited by 40 publications

(6 citation statements)

References 22 publications

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“…The reason is that some fibers in SFRC specimens cannot cross the cracked surface due to their directions being parallel to the surface, even close to the section. However, the fibers in ASFRC are always intersected with the cracked surface because of the alignment of steel fibers [48]. 5).…”

Section: Fiber Orientation Efficiency Factor and Reinforcement Mechanismmentioning

confidence: 99%

Investigation on Fracture Behavior of Cementitious Composites Reinforced with Aligned Hooked-End Steel Fibers

et al. 2022

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Aligning steel fibers is an effective way to improve the mechanical properties of steel fiber cementitious composites (SFRC). In this study, the magnetic field method was used to prepare the aligned hooked-end steel fiber cementitious composites (ASFRC) and the fracture behavior was investigated. In order to achieve the alignment of steel fibers, the key parameters including the rheology of the mixture and magnetic induction of electromagnetic field were theoretically analyzed. The results showed that, compared with SFRC, the cracking load and the ultimate load of ASFRC were increased about 24–55% and 51–86%, respectively, depending on the fiber addition content. In addition, the flexural tensile strength and residual flexural strength of ASFRC were found to increase up to 105% and 100%, respectively. The orientation of steel fibers also has a significant effect on energy consumption. The fracture energy of ASFRC was 56–70% greater than SFRC and the reinforcement effect of hooked-end steel fiber was higher than straight steel fiber. The fibers in the fracture surface showed that not only was the number of fibers of ASFRC higher than that of SFRC, but also the orientation efficiency factor of ASFRC was superior to SFRC, which explains the improvement of fracture behavior of ASFRC.

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Section: Fiber Orientation Efficiency Factor and Reinforcement Mechanismmentioning

confidence: 99%

Investigation on Fracture Behavior of Cementitious Composites Reinforced with Aligned Hooked-End Steel Fibers

et al. 2022

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“…One main disadvantage of these composites is the fact that the properties of NLFs are more heterogeneous than synthetic fibers. As they come from a controlled industrial process, synthetic fibers have well-defined properties and characteristics [ 38 , 39 ]. NLFs, on the other hand, are subject to the weather and climatic variation in nature, changing their properties depending on the geographic location, time or season of the year, and other environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Potential of Using Amazon Natural Fibers to Reinforce Cementitious Composites: A Review

Lima¹,

Azevedo²,

Marvila

et al. 2022

Polymers

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The engineering application of natural lignocellulosic fibers (NLFs) has been intensifying all over the world due to their low cost and abundance, as well as their being eco-friendly and presenting favorable technological properties in polymeric and cementitious composites. Brazil, especially the Amazon region, owing to its climate and geographic position, has an abundant variety of NLFs that are still unexplored with great potential for use in various composite materials and applications such as civil construction, automobile parts and armor. Therefore, this review aims to establish a parallel between the technological properties of cementitious composites reinforced with Amazon NLFs, both in fresh and hardened states, and to analyze, compare results and contribute to a better understanding of the similarities and differences between the types of reinforcements. A relevant contribution of this review is the possibility of improving knowledge about Amazon NLFs, showing their potential for application in eco-friendly materials, in addition to contributing to studies with new NLFs not yet applied in composite. For this, it was necessary to carry out a literature survey on the physical, chemical and mechanical properties of cementitious composites reinforced with NLFs, in addition to analyzing case studies involving fibers such as curaua, açai, bamboo, jute and sisal. It can be concluded that the physical and chemical characteristics of the Amazon NLFs directly influence the technological properties of cementitious compounds, such as mechanical strength and water absorption. However, there might be a need for surface treatment aimed at improving adhesion and durability of the cementitious composite. Finally, some suggestions for future research work are highlighted in order to show the need to continue investigations on the application of Amazon NLFs in cementitious composites.

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“…elastic waves). 6–8 AE signals are highly sensitive toward microcracks and thus have gained attention as an effective NDT method. 9–11 The signals (i.e.…”

Section: Introductionmentioning

confidence: 99%

Effect of propagation distance on acoustic emission of carbon fiber/epoxy composites

Jung

Lee

et al. 2021

Structural Health Monitoring

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This study examined the change in acoustic emission as a function of measurement position of fiber-reinforced composites. Single-edge-notched carbon fiber/epoxy composites were prepared and tested under cyclic loading, with sensors located at specific distances from the end of the notch. Although the I b-value increased overall, the degree of increase significantly varied with position and acoustic emission frequency. Notably, the proportion of acoustic emission signals for each failure mode varied due to a high attenuation rate at high frequencies, which increased the I b-value. Accordingly, the high-frequency fiber-failure signals significantly affected the I b-value. This study focused on the importance of analyzing acoustic emission signals by considering the crack location and frequency-dependent attenuation rate. We concluded that an acoustic emission sensor should be located 20–40 mm from the crack location for woven carbon fiber/epoxy composites.

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Investigation on reinforcement of aligned steel fiber on flexural behavior of cement-based composites using acoustic emission signal analysis

Cited by 40 publications

References 22 publications

Investigation on Fracture Behavior of Cementitious Composites Reinforced with Aligned Hooked-End Steel Fibers

Investigation on Fracture Behavior of Cementitious Composites Reinforced with Aligned Hooked-End Steel Fibers

Potential of Using Amazon Natural Fibers to Reinforce Cementitious Composites: A Review

Effect of propagation distance on acoustic emission of carbon fiber/epoxy composites

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