Cement-matrix structural nanocomposites

Chung, D.D.L.

doi:10.1007/bf03027364

Cited by 23 publications

(14 citation statements)

References 189 publications

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“…Hence, several researches have focused on the development of multifunctional materials, which combine both mechanical properties and functional applications [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The latter includes such different topics as strain sensing capacity, damage sensing, temperature sensing, heating control, vibration damping or electromagnetic waves reflection and absorption.…”

mentioning

confidence: 99%

Strain and damage sensing properties on multifunctional cement composites with CNF admixture

Galao¹,

Baeza²,

Zornoza³

et al. 2014

Cement and Concrete Composites

241

117

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mentioning

confidence: 99%

Strain and damage sensing properties on multifunctional cement composites with CNF admixture

Galao¹,

Baeza²,

Zornoza³

et al. 2014

Cement and Concrete Composites

241

117

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“…Recently carbon nanotubes (CNT) and carbon nanofibers (CNF) have shown very good mechanical, thermal and electrical performances (28)(29)(30)(31)(32)(33). Carbon materials have a high thermal conductivity (however not as much as metals), a low thermal coefficient (lower than metals) and they are also very resistant to corrosion (8).…”

Section: Introductionmentioning

confidence: 99%

“…strain sensing (3) or ECE anode (23). CNF cement composites could be a real alternative once the dosage and energy consumption have been optimized, as they show good durability and good mechanical performance (3,28,33,35).…”

Section: Introductionmentioning

confidence: 99%

Self-heating function of carbon nanofiber cement pastes

Galao¹,

Baeza²,

Zornoza³

et al. 2014

Mater. construcc.

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ABSTRACT:The viability of carbon nanofiber (CNF) composites in cement matrices as a self-heating material is reported in this paper. This functional application would allow the use of CNF cement composites as a heating element in buildings, or for deicing pavements of civil engineering transport infrastructures, such as highways or airport runways.Cement pastes with the addition of different CNF dosages (from 0 to 5% by cement mass) have been prepared. Afterwards, tests were run at different fixed voltages (50, 100 and 150V), and the temperature of the specimens was registered. Also the possibility of using a casting method like shotcrete, instead of just pouring the fresh mix into the mild (with no system's efficiency loss expected) was studied.Temperatures up to 138 °C were registered during shotcrete-5% CNF cement paste tests (showing initial 10 °C/min heating rates). However a minimum voltage was required in order to achieve a proper system functioning. RESUMEN: Función de calefacción en pastas de cemento con adición de nanofibras de carbono.En este artículo se estudia la viabilidad del uso de matrices cementicias con adición de nanofibras de carbono (NFC) como elementos calefactores. Esto permitiría aumentar la temperatura de estancias en edificación o el deshielo de pavimentos en obras civiles.Se han fabricado pastas de cemento con distintas dosificaciones de NFC (0, 1, 2 y 5% respecto masa del cemento) y sometidas al paso de corriente continua a distintos potenciales fijos (50, 100 y 150 V), mientras se controlaba la temperatura en distintos puntos. Se ha estudiado la viabilidad de utilizar la proyección de la pasta fresca como método de puesta en obra, sin perjudicar la eficiencia del sistema.Se consiguieron temperaturas de hasta 138 °C (con velocidades iniciales de 10 °C/min) para pasta proyectada con 5% NFC. Además se ha detectado la necesidad de un potencial mínimo para que la densidad de corriente resultante sea suficiente para producir el efecto esperado.

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“…Por ello en los últimos años muchas líneas de investigación trabajan en el desarrollo de materiales multifuncionales que combinen propiedades estructurales y funcionales (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11).…”

Section: Introductionunclassified

“…Los métodos empleados para tal fin van desde el uso combinado de surfactantes y sonicado, la modificación superficial de las nanofibras, funcionalización (incorporación de grupos moleculares a la superficie de la fibra que mejoren su afinidad con la matriz) (14), hasta incluso el crecimiento de las nanofibras de carbono directamente on the development of multifunctional materials which combine both structural properties and functional applications (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11).…”

Section: Introductionunclassified

Efecto de la adición de nanofibras de carbono en las propiedades mecánicas y de durabilidad de materiales cementantes

Galao¹,

Zornoza²,

Baeza³

et al. 2012

Mater. construcc.

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Palabras clave: nanofibras de carbono, cemento, propiedades mecánicas, durabilidad, corrosión. INTRODUCCIÓNActualmente la demanda de estructuras "inteligentes", capaces de detectar determinados estímulos y responder a ellos de forma adecuada, ha provocado que no solo se busque emplear materiales de construcción con buenas propiedades mecánicas y de durabilidad, sino que se SUMMARY This paper reports on recent work that is directed at studying the changes in the mechanical properties of Portland cement based mortars due to the addition of carbon nanofiber (CNF). Both flexural and compression strength has been determined and related to the CNF addition to the mix, to the curing time and to the porosity and density of the matrix. Also, corrosion of embedded steel rebars in CNF cement pastes exposed to carbonation and chloride attacks has been investigated. The increase in CNF addition implies higher corrosion intensity and higher levels of mechanical properties.

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Cement-matrix structural nanocomposites

Cited by 23 publications

References 189 publications

Strain and damage sensing properties on multifunctional cement composites with CNF admixture

Strain and damage sensing properties on multifunctional cement composites with CNF admixture

Self-heating function of carbon nanofiber cement pastes

Efecto de la adición de nanofibras de carbono en las propiedades mecánicas y de durabilidad de materiales cementantes

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