|
|
|
Title: Carbon Nanofiber–Reinforced Cement-Based Materials
Accession Number: 01157609
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: Fibers are incorporated into cementitious matrices to help control cracking by bridging and providing load transfer across cracks and pores. Typical reinforcement of concrete is usually provided at the macro- and microscales by using macrofibers and microfibers, respectively. Although microfibers delay the propagation of microcracks, they do not stop their initiation. Theory suggests that nanofibers delay the formation of nanocracks, thus requiring higher loads to initiate cracking, which improves the weak tensile strength of the cementitious matrix. In this paper, a detailed investigation of the effects of carbon nanofibers (CNFs) on the flexural strength and nanostructure of the cement matrix was conducted. An ultra-high-resolution field emission scanning electron microscope was used to investigate the morphology of the nanocomposites. Nanoimaging of the fracture surfaces of cementitious nanocomposites reinforced with CNFs at different concentrations has shown that CNFs are able to bridge nanocracks and pores and achieve good bonding with the cement hydration products. As a result, the incorporation of CNFs was shown to improve significantly the flexural strength of the cementitious matrix.
Monograph Title: Monograph Accession #: 01157601
Report/Paper Numbers: NANO10-0057
Language: English
Authors: Metaxa, Zoi SKonsta-Gdoutos, Maria SShah, Surendra PPagination: pp 114-118
Publication Date: 2010
ISBN: 9780309142779
Media Type: Print
Features: Figures
(7)
; References
(15)
TRT Terms: Uncontrolled Terms: Subject Areas: Materials; I32: Concrete
Files: TRIS, TRB, ATRI
Created Date: May 27 2010 1:39PM
More Articles from this Serial Issue:
|
