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

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

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, a...

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Bibliographic Details
Published in:Materials Vol. 4; no. 3; pp. 575 - 584
Main Authors: Ludvig, Péter, Calixto, José M, Ladeira, Luiz O, Gaspar, Ivan C P
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 18-03-2011
MDPI
Subjects:
Carbon
Cement
Chemical vapor deposition
Communication
Costs
Dust
Nanostructured materials
Scanning electron microscopy
Scientific imaging
Silicon carbide
Steel production
Temperature
Tensile strength
Thermogravimetric analysis
Transmission electron microscopy
Brazil
CVD
composites
compressive strength
cement
flexural strength
carbon nanotubes
in situ synthesis
converter dust
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Summary: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.
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ISSN:1996-1944
1996-1944
DOI:10.3390/ma4030575