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

Materials

Péter Ludvig²  José M. Calixto²  Luiz O. Ladeira¹ 

[1] Nanomaterials Laboratory, Department of Physics, Federal University of Minas Gerais/Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte-MG, CEP 31.270-901, Brazil; E-Mail:;Department of Structural Engineering, Federal University of Minas Gerais/Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte-MG, CEP 31.270-901, Brazil; E-Mails:

关键词: cement;    carbon nanotubes;    composites;    converter dust;    in situ synthesis;    CVD;    compressive strength;    flexural strength;   

DOI  :  10.3390/ma4030575

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.