Functionally-graded fiber-reinforced cement composite: Processing, microstructure, and properties

Shen, Bin; Hubler, Mija H.; Paulino, Gláucio H.; Struble, Leslie J.

doi:10.1016/j.cemconcomp.2008.02.002

Cited by 103 publications

(75 citation statements)

References 10 publications

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“…La dispersión se mejora usando humo de sílice como aditivo. El humo de sílice se usa de forma habitual con una pequeña cantidad (0.4% en peso de cemento) de metilcelulosa (Chen et al, 1997 (Mu et al, 2002) (Shao, Shah, 1997) (Shen et al, 2008) (Kuder, Shah, 2010) (Qian et al, 2003) (Shao et al, 2001). Hambach (Hambach et al, 2016) estudió el comportamiento a flexión y a compresión de compuestos de cemento reforzados con fibras alineadas.…”

Section: Materiales Y Metodologíaunclassified

Propiedades mecánicas de morteros de cemento con adiciones de fibras de carbono, nanotubos de carbono y grafeno = Mechanical properties of cement mortars with additions of carbon fibres, carbon nanotubes and graphene

Goicoechea

2017

ADE

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Resumen-El carbono es uno de los elementos más abundantes de la naturaleza. Su particular estructura hace que pueda tener hasta cinco tipos distintos de alótropos. Durante los últimos años se han producido grandes avances en el estudio de estos materiales de carbono. Las fibras de carbono (CF), los nanotubos de carbono (CNTs) y el grafeno y óxido de grafeno (GO), en función de su estructura y su escala, presentan unas propiedades notablemente diferenciadas. Este estudio pretende comparar y determinar los efectos de estas características en matrices de cemento. Las características de estos materiales son difíciles de transmitir de forma exacta a los compuestos de cemento y hormigones, principalmente por las dificultades que presentan los nanomateriales en su dispersión. Por ello, los datos obtenidos en distintos estudios muestran resultados muy variables. Sin embargo, se ha demostrado que, para mejoras medias, los nanomateriales resultan ser más eficientes.Palabras clave-fibras de carbono, nanotubos de carbono, grafeno, cemento.Abstract-Carbon is one of the most abundant elements of nature. Its particular structure has to have up to five different types of allotropes. During the last years there have been great advances in the study of these carbon materials. Carbon fibers (CF), carbon nanotubes (CNT) and graphene and graphene oxide (GO), depending on their structure and scale, have remarkably different properties. This study aims to compare and determine the effects of these characteristics on cement matrices. The characteristics of these materials are difficult to transmit accurately to concrete and cement compounds, mainly due to the difficulties presented by nanomaterials in their dispersion. Therefore, the data obtained in different studies, results, very variable. However, it has been shown that, for average improvements, nanomaterials are more efficient.

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Section: Materiales Y Metodologíaunclassified

Propiedades mecánicas de morteros de cemento con adiciones de fibras de carbono, nanotubos de carbono y grafeno = Mechanical properties of cement mortars with additions of carbon fibres, carbon nanotubes and graphene

Goicoechea

2017

ADE

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“…The concept allows eliminating the materialproperty discontinuities by grading the material composition near the interfaces and varying the material among layers, which results in a most cost-efficient multifunctional material. Typical examples can be found in Maalej et al (2003), Shen et al (2008), Baoguo et al (2009), Dias et al (2010), Bosch et al (2010) and Wen et al (2010). Though, the significant advantages of these different layered-Functionally Graded Cement Composites (FGCCs) they still involve significant production process and/or sectional design drawbacks (Río 2009).…”

Section: Introductionmentioning

confidence: 99%

Special Issue: Concrete Sustainability

Noguchi¹

2015

ACT

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Production of cement is ranking 3 rd in causes of man-made carbon dioxide emissions world-wide. Thus, in order to make concrete more sustainable one may work along one or more of the following routes; 1) Replacing cement in concrete with larger amounts of supplementary cementing materials (SCMs) than usual, 2) Replacing cement in concrete with combinations of SCMs leading to synergic reactions enhancing strength, 3) Producing leaner concrete with less cement per cubic meter utilizing plasticizers and 4) Making concrete with local aggregate susceptible to alkali silica reaction (ASR) by using cement replacements, thus avoiding long transport of non-reactive aggregate.

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“…This motivation has been further elevated by the recent research of functionally graded fiber reinforced cementitious composites (e.g. Dias et al 2010;Shen et al 2008), where nonuniform fiber distribution is introduced in a controlled manner in order to optimize the properties of structural members. Park et al (2010), for example, used a cohesive fracture model adapted for non-uniform material to simulate the performance of functionally graded FRC beams by the finite element method (FEM).…”

Section: Introductionmentioning

confidence: 99%

Modeling of High-Strength FRC Structural Elements with Spatially Non-Uniform Fiber Volume Fraction

Kabele

Sajdlová

Rydval

et al. 2015

ACT

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The research presented in this paper has been motivated by the need to numerically simulate performance of high strength fiber reinforced concrete (HSFRC) structural elements with given spatially variable fiber volume fraction. The intended applications include prediction of load and deformation capacity of HSFRC members with imperfect fiber distribution or design and verification of functionally graded HSFRC members. In order to achieve a predictive capability, modeling is based on micromechanics of fiber debonding, pullout and crack-bridging. The concept of cohesive crack is employed for implementation in the finite element method (FEM). A strong emphasis is placed on the feasibility of the model identification. To this end, a procedure which uses data from conventional notched-beam fracture tests and inverse analysis to determine the model parameters is proposed. The model and the identification method are verified and validated both on micro and macro scales by comparing predicted results with experimental data.

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Functionally-graded fiber-reinforced cement composite: Processing, microstructure, and properties

Cited by 103 publications

References 10 publications

Propiedades mecánicas de morteros de cemento con adiciones de fibras de carbono, nanotubos de carbono y grafeno = Mechanical properties of cement mortars with additions of carbon fibres, carbon nanotubes and graphene

Propiedades mecánicas de morteros de cemento con adiciones de fibras de carbono, nanotubos de carbono y grafeno = Mechanical properties of cement mortars with additions of carbon fibres, carbon nanotubes and graphene

Special Issue: Concrete Sustainability

Modeling of High-Strength FRC Structural Elements with Spatially Non-Uniform Fiber Volume Fraction

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