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Materials 2011, 4(3), 575-584; doi:10.3390/ma4030575
Communication

Using Converter Dust to Produce Low Cost Cementitious Composites by in situ Carbon Nanotube and Nanofiber Synthesis

1,2,* , 1
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2
 and
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Received: 13 January 2011 / Revised: 2 March 2011 / Accepted: 16 March 2011 / Published: 18 March 2011
(This article belongs to the Special Issue Innovative Materials in Civil Constructions)
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Abstract

Carbon nanotubes (CNTs) and nanofibers (CNFs) were synthesized on clinker and silica fume particles in order to create a low cost cementitious nanostructured material. The synthesis was carried out by an in situ chemical vapor deposition (CVD) process using converter dust, an industrial byproduct, as iron precursor. The use of these materials reduces the cost, with the objective of application in large-scale nanostructured cement production. The resulting products were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA) and were found to be polydisperse in size and to have defective microstructure. Some enhancement in the mechanical behavior of cement mortars was observed due to the addition of these nano-size materials. The contribution of these CNTs/CNFs to the mechanical strength of mortar specimens is similar to that of high quality CNTs incorporated in mortars by physical mixture.
Keywords: cement; carbon nanotubes; composites; converter dust; in situ synthesis; CVD; compressive strength; flexural strength cement; carbon nanotubes; composites; converter dust; in situ synthesis; CVD; compressive strength; flexural strength
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Ludvig, P.; Calixto, J.M.; Ladeira, L.O.; Gaspar, I.C. Using Converter Dust to Produce Low Cost Cementitious Composites by in situ Carbon Nanotube and Nanofiber Synthesis. Materials 2011, 4, 575-584.

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