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

Abstract

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.

Self-Sensing Properties of Alkali Activated Blast Furnace Slag (BFS) Composites Reinforced with Carbon Fibers

“…Therefore, as concrete is a bad electrical conductor, conductive admixtures are needed. Several researchers have focused on these conductive admixtures (e.g., steel fibers, or carbon materials: carbon fibers, graphite powder, carbon nanofibers or nanotubes) in order to achieve a better electrical behavior without compromising the composite’s mechanical properties [12,13,14,15,16,17,19,20,21,22,23,24]. Thus, for each type of conductive admixture, the relationship between their dosage and the composite’s conductivity has to be determined.…”

Influence of Carbon Fibers on Strain and Damage Sensing of Self Compacting Concrete under External Applied Forces

“…Many researchers looked at the behavior of cement mortar and cement paste when introduced carbon fiber to samples [5,9,10]. Strain [11] and damage sensing [12] properties were investigated [13,14] on cement composites in multiples of carbon-fibers (CF's) and carbon nano-tubes (CNT) in different percentages dosage both individually and as well as in combination [15]. Few other researchers have also researched the true implementation of carbon fibers in cement composites for traffic surveillance [16] and SHM [17].…”

New composite of natural hydraulic lime mortar with graphene oxide

“…The most significant improvements in mortars occur with the addition of GO in small amounts (0.03 wt.% to 0.05 wt). Adding MWCNT or CNF lead to minor improvements in the mechanical properties of cementitious mortars [7][8][9][10][11][12].…”