Study on the Effects of Carbon Fibers and Carbon nanofibers on Electrical Conductivity of Concrete

Wang, Tengjiao; Xu, Jinyu; Bai, Erlei; Luo, Xu; Chen, Haowen; Liu, Gaojie; Chang, Sen

doi:10.1088/1755-1315/267/3/032011

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…For fine aggregate, it is possible to use fine recycled aggregates RFA obtained from concrete, produced by mechanical crushing, composed of natural fine aggregate coated with hardened mortar or paste, which results in lower mechanical strength, different setting times and higher water absorption. Its use is an action that contributes to the sustainability of construction materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Recycled Conductive Mortar

Cervantes¹,

Rodriguez²,

Rea³

et al. 2023

Masonry for Sustainable Construction

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Due to the urgent need to care for the environment, the use of recycled materials is necessary. The creation of multifunctional materials with content of recycled materials presents an alternative to reduce the use of natural resources. This is through the addition of recycled fine aggregate, product of industrial waste in its manufacture, such as graphite powder (GP) and carbon fiber (CF), turning it into conductive recycled mortar (CRM). The sustainability of this new material brings great ecological benefits, such as the reduction in the use of fine aggregates, which are naturally present in rivers, and also, lower production of construction waste sent to landfills. In this research, an evaluation of the effect of the addition of carbon fiber and graphite powder on wet, dry and hardened electrical properties, electrical percolation in dry state, and flowability of the mixture of recycled conductive mortar in a wet state-based on cement―fine aggregate from waste blocks―graphite powder was carried out. The results obtained showed the effect of the addition of GP and CF to the mortar mix, mainly the reduction of its flowability, caused by the physical interaction between the recycled sand or recycled fine aggregate RFA and the carbon fiber CF, as well as the graphite powder GP.

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Section: Introductionmentioning

confidence: 99%

Recycled Conductive Mortar

Cervantes¹,

Rodriguez²,

Rea³

et al. 2023

Masonry for Sustainable Construction

View full text Add to dashboard Cite

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Research on different types of fiber reinforced concrete in recent years: An overview

Zhao

Wang

Zhu

et al. 2023

Construction and Building Materials

108

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Assessing durability properties of ultra-high performance concrete-class materials

Saladi,

Montanari,

De la Varga

et al. 2023

Mater Struct

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Ultra-high performance concrete (UHPC) is a class of concrete materials that has received significant attention from the infrastructure community due to its favorable mechanical and durability performance. As the use of UHPC in infrastructure projects is becoming more common, there is an increasing interest in identifying appropriate testing techniques to assess the durability properties of UHPC-class materials. The dense microstructure of UHPC-class materials and the presence of a high concentration of fiber reinforcement have made it difficult to rely on existing standard testing approaches for concrete durability assessment. This study explores the application of various conventional-concrete durability test methods to UHPC, including electrical resistivity (American Association of State Highway and Transportation Officials (AASHTO) TP 119-22), freeze–thaw (ASTM C666), water absorption (ASTM C1585), and rapid chloride migration test (NT BUILD 492). The selected tests are meant to qualify and quantify the microstructural penetrability of UHPC to ions and fluids, a surrogate property commonly used as an indicator of durability. The findings from this study indicate that electrical resistivity can be used as a durability indicator for UHPC-class materials. Moreover, strong correlation between electrical resistivity and the chloride migration coefficient is identified, a potential benefit given that chloride migration can be used to estimate service lives of UHPC-class materials. Other tests, including freeze–thaw and water absorption, although identifying the favorable performance of UHPC relative to conventional concrete, were unable to provide insightful information through which the performance of individual UHPCs could be differentiated.

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Study on the Effects of Carbon Fibers and Carbon nanofibers on Electrical Conductivity of Concrete

Cited by 3 publications

References 16 publications

Recycled Conductive Mortar

Recycled Conductive Mortar

Research on different types of fiber reinforced concrete in recent years: An overview

Assessing durability properties of ultra-high performance concrete-class materials

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