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Microestructura de un material compuesto basado en una matriz de cemento reforzado con fibras de polipropileno

Authors: Rincón López, Jesús María; Romero, Maximina; Hernández, M. S.; Talero Morales, Rafael; García-Santos, A.;

Microestructura de un material compuesto basado en una matriz de cemento reforzado con fibras de polipropileno

Abstract

[ES] Se ha llevado a cabo una observacíón microestructural detallada de un material compuesto de fibras de polipropileno embebidas en una matriz de cemento usando los nuevos tipos de microscopía electrónica de barrido, tales como: un microscopio electrónico medioambiental (acrónimo en inglés: ESEM) y uno de emisión de campo (acrónimo en inglés: FESEM). La microestructura de las diferentes fases que componen la matriz es muy heterogénea, aunque hay una distribución uniforme de las fibras dentro de ellas. La superficie de este material compuesto es diferente después del fraguado, curado y endurecimiento según qué zonas estén o no en contacto con las paredes del molde. La interfase entre las diferentes fases cristalinas de la matriz de cemento y las fibras dispersadas se ha observado a diferentes aumentos, comprobándose compatibilidad entre la matriz y las fibras poliméricas. Las propiedades de resistencia mecánica (tanto a flexión como a compresión) han sido también evaluadas, comprobándose la mejora de las mismas con el uso como aditivo de Melamina Formaldehido con lo que se consigue un reforzamiento de la matriz cementante en este material compuesto.

[EN] The present investigation deals with the microstructural characterization of a composite material, which is comprised of polypropylene fibers in an cement matrix, by means of environmental scanning electron microscopy (ESEM) and field emission scanning electron microscopy (FESEM). The microstructure of the different phases that compose the matrix is very heterogeneous, though there is a uniform distribution of the fibers inside it. The surface of this composite is different after setting, cured and hardening depending if the zone is or not in touch with the walls of the mould. The interface between the different crystalline regions of the cement matrix and the dispersed fibers shows compatibility between the matrix and the polymeric fibers. The mechanical properties (compression and bending strength) have also been evaluated. The use of melamine formaldehyde as additive leads to a reinforcement of the cement matrix and to the improvement of the mechanical properties.

Se agradece el apoyo financiero del Proyecto de Investigación Nº A-9907 de la Universidad Politécnica de Madrid. Esta investigación se ha efectuado gracias al Acuerdo MArco de Cooperación entre la Universidad Politécnica de Madrid (UPM) y el Consejo Superior de Investigaciones Científicas (CSIC).

10 páginas, 7 figuras, 4 tablas.

Peer reviewed

Keywords

Polymer/cement composite (PMCs), Electron microscopy, Microscopía electrónica, FESEM, Microestructura, Polypropylene, ESEM, Microstructure, Polipropileno, Material compuesto polímero/cemento (PMCs)

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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