The mechanical properties of Portland cement mortars blended with carbon nanotubes and nanosilica: A study by experimental design

The pozzolanic effect of nanosilica (NS) particles when combined with Multi Walled Carbon Nanotubes (MWCNT) was studied in Ca(OH)2 pastes and Portland cement mortars. Experimental design techniques were used to plan the experiments and identify the effect of the nanoparticles on the properties of th...

Full description

Autores:
Mendoza-Reales, Oscar A.
Sierra Gallego, Germán
Tobón, Jorge I.
Tipo de recurso:
Article of journal
Fecha de publicación:
2016
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/60516
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/60516
http://bdigital.unal.edu.co/58848/
Palabra clave:
62 Ingeniería y operaciones afines / Engineering
Carbon nanotubes
nanosilica
hybrid effect
pozzolanic activity
strength
Nanotubos de carbono
nanosílice
efecto híbrido
actividad puzolánica
resistencia mecánica
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
Description
Summary:The pozzolanic effect of nanosilica (NS) particles when combined with Multi Walled Carbon Nanotubes (MWCNT) was studied in Ca(OH)2 pastes and Portland cement mortars. Experimental design techniques were used to plan the experiments and identify the effect of the nanoparticles on the properties of the cementing matrices by means of Analysis of Variance (ANOVA). Samples were prepared with different combinations of NS and MWCNT. Ca(OH)2 pastes were used to study the effect the nanoparticles had on the Calcium-Silicate-Hydrate (C-S-H) production. Portland cement mortars were used to study the effect of the nanoparticles on the compressive and flexural strength of the cementing matrices. We found that only NS had a significant effect on the C-S-H formation for up to 21 days of hydration, and that MWCNT did not present a positive effect on the mechanical strength of mortars due to the effects of reagglomeration.