Evaluation of carbon fiber reinforced cementitious matrix as a recyclable strengthening material

Li, Wan-qian; Zhu, Ji-Hua; Chen, Pi-yu; Xing, Feng; Li, Dawang; Su, Meini

doi:10.1016/j.jclepro.2019.01.256

Cited by 22 publications

(6 citation statements)

References 8 publications

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“…Additionally, a series of defects are introduced by fibrous agglomeration. Research has established that not only is the potential of CFRC in terms of its mechanical properties not being fully utilized [ 26 ], but its conductivity is also affected [ 27 ]. Thus, it is necessary to improve CFRC through appropriate reinforcement and modification processes to obtain good performance.…”

Section: Reinforcement and Modification Mechanism Of Cfrcmentioning

confidence: 99%

Recent Advances in Properties and Applications of Carbon Fiber-Reinforced Smart Cement-Based Composites

Hao

Shi

et al. 2023

Materials

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Under the strategies of low-carbon and environmental protection, promoting green technology innovation to achieve carbon neutrality in the construction field has become a universal goal. As the building material with the highest consumption, concrete has gradually begun to transform into a multi-functional and intelligent product. Therefore, the research on carbon fiber-reinforced cement-based composites (CFRCs) is of relative interest. It mainly uses carbon fibers (CFs) with high elasticity, strength, and conductivity to disperse evenly into the concrete as a functional filler, to achieve the intelligent integration of concrete structures and function innovatively. Furthermore, the electrical conductivity of CFRC is not only related to the content of CFs and environmental factors but also largely depends on the uniform dispersion and the interfacial bonding strength of CFs in cement paste. This work systematically presents a review of the current research status of the enhancement and modification mechanism of CFRC and the evaluation methods of CF dispersion. Moreover, it further discusses the improvement effects of different strengthening mechanisms on the mechanical properties, durability, and smart properties (thermoelectric effect, electrothermal effect, strain-sensitive effect) of CFRC, as well as the application feasibility of CFRC in structural real-time health monitoring, thermal energy harvesting, intelligent deformation adjustment, and other fields. Furthermore, this paper summarizes the problems and challenges faced in the efficient and large-scale applications of CFRCs in civil engineering structures, and accordingly promotes some proposals for future research.

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Section: Reinforcement and Modification Mechanism Of Cfrcmentioning

confidence: 99%

Recent Advances in Properties and Applications of Carbon Fiber-Reinforced Smart Cement-Based Composites

Hao

Shi

et al. 2023

Materials

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“…First, two CFRP bonding methods were investigated: externally bonded (EB) CFRP, which is used to strengthen existing RC structures, and internally bonded (IB) CFRP, which is used during the creation of a new structure. The EB CFRP was adhered to the concrete by an adhesive binder, instead of epoxy resin, mixed with short-chopped carbon fibers [14,15], whereas the IB CFRP was inserted into the concrete during casting. The concrete specimens with EB CFRP are shown in Figure 1a,b, and those with IB CFRP are shown in Figure 1c,d, where one sample was prepared for each concrete specimen.…”

Section: Cement (Kg/m 3 )mentioning

confidence: 99%

Anodic and Mechanical Behavior of Carbon Fiber Reinforced Polymer as a Dual-Functional Material in Chloride-Contaminated Concrete

et al. 2020

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Carbon fiber reinforced polymer (CFRP) has been used as a dual-functional material in a hybrid intervention system (ICCP-SS) which integrates the impressed current cathodic protection (ICCP) and structural strengthening (SS). The mechanical behavior of CFRP as an anode has been investigated in some solution environments. However, the anodic and mechanical behavior of CFRP bonded to concrete is unclear. This paper focuses on the anodic and mechanical performance of CFRP bonded to the chloride-contaminated concrete by conducting an electrochemical (EC) test. The method of bonding the CFRP to the concrete and the shape of the steel embedded in the concrete were considered. The current densities of 20 mA/m2 and 100 mA/m2 were applied during 120-day and 310-day EC tests. The electrode potentials and driving voltages were recorded, and the bond interfaces of the CFRP were inspected after EC test. The residual tensile strength and failure modes of the CFRP were analyzed after tensile tests. Finally, the long-term performance of CFRP as a dual-functional material in ICCP-SS system was discussed. Results show that the externally bonding CFRP in ICCP-SS system can not only protect the steel in chloride-contaminated concrete effectively but also maintain 70% of the original tensile strength of CFRP at a charge density of 744 A·h/m2. The expected service period of CFRP as a dual-functional material bonded to the chloride-contaminated concrete was determined to be more than 42.5 years.

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“…With the development of engineering design, the fiber sandwich structures with polymeric cores are widely used in aerospace, marine, automotive, and civil engineering. In order to satisfy the requirement of industry application, it is necessary to understand the mechanical properties of fiber sandwich structures with foam cores, such as the dynamic behavior and protective mechanism of the structures under impact and impulsive loading [1–3].…”

Section: Introductionmentioning

confidence: 99%

Dynamic failure of carbon fiber-reinforced plastics sandwich structures with polyvinyl chloride foam cores subjected to impact loading

Ren

Liu

Tao

et al. 2020

Jnl of Sandwich Structures & Materials

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The dynamic failure of carbon/epoxy sandwich plates with polyvinyl chloride foam core subjected to foam projectile impact is experimentally analyzed in this research. The effects of intensity of impact impulse, cores density, core thickness on the impact resistance of the composite sandwich plates in terms of deflection of rear sheets are also assessed. The 3D- digital image correlation technique is applied to measure the dynamic deformation of the sandwich plates. The results show that the carbon/epoxy sandwich plates exhibit more excellent impact resistance than aluminum sandwich plates with polyvinyl chloride cores at the similar area mass. The carbon/epoxy sandwich plates experience an obvious spring back, and only a slight plastic deflection can be observed after test. The failure modes of the sandwich plates include plastic deformation, fiber breakage, delamination, matrix crack, debonding, and compression of cores. The damage of plates become more serious with core density and core thickness decreasing, and impact impulse increasing, respectively.

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Evaluation of carbon fiber reinforced cementitious matrix as a recyclable strengthening material

Cited by 22 publications

References 8 publications

Recent Advances in Properties and Applications of Carbon Fiber-Reinforced Smart Cement-Based Composites

Recent Advances in Properties and Applications of Carbon Fiber-Reinforced Smart Cement-Based Composites

Anodic and Mechanical Behavior of Carbon Fiber Reinforced Polymer as a Dual-Functional Material in Chloride-Contaminated Concrete

Dynamic failure of carbon fiber-reinforced plastics sandwich structures with polyvinyl chloride foam cores subjected to impact loading

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