Servicios Personalizados
Revista
Articulo
Indicadores
- Citado por SciELO
- Accesos
Links relacionados
- Citado por Google
- Similares en SciELO
- Similares en Google
Compartir
DYNA
versión impresa ISSN 0012-7353versión On-line ISSN 2346-2183
Resumen
YANGUATIN, Hernan; TIRONI, Alejandra y TOBON, Jorge I.. Study of excavated clays with kaolinite and dickite as pozzolanic materials. Dyna rev.fac.nac.minas [online]. 2022, vol.89, n.220, pp.99-109. Epub 13-Sep-2022. ISSN 0012-7353. https://doi.org/10.15446/dyna.v89n220.98930.
In the present study, samples of excavated waste clays were thermally activated at 550 °C and 650 °C, these clays with low kaolinite content and presence of dickite have a limited industrial exploitation but are widely availability in developing countries and have the potential to use as pozzolanic material. The effects on the calcium hydroxide fixation and the compressive strength were evaluated in lime pastes and mortars blended with calcined excavated clays. The experimental results and statistical modelling using multiple regression analysis showed that the compressive strength at 28 days increased 5%, when the kaolinite increased up to 20% and dickite up to 40%, for a clay with SSA of 4000 cm2/g and calcined at 550 °C. Also, by increasing SSA up to 6000 cm2/g and calcination temperature up to 650 °C, the compressive strength increased 10% and 15%, respectively.
Palabras clave : calcined clay; low grade clay; pozzolans; waste valorisation; kaolinite.