CENTRO DE INVESTIGACIONES EN FISICA E INGENIERIA DEL CENTRO DE LA PROVINCIA DE BUENOS AIRES
Unidad Ejecutora - UE
Red ceramic wastes: A calcined clay pozzolan.
VIVIANA FÁTIMA RAHHAL; PAVLÍK ZBY?EK; MÓNICA ADRIANA TREZZA; CLAUDIA CRISTINA CASTELLANO; ALEJANDRA TIRONI; KULOVANÁ TERESA ; POKORNÝ J; CERNY ROBERT; EDGARDO FABIÁN IRASSAR
Springer Science + Business Media
Lugar: Nueva York; Año: 2015 vol. 10 p. 178 - 178
The propertiesand hydration of blended cements containing from 8 to 40 % by mass of ceramicwaste (CW) from different countries (Argentine and Czech Republic) are investigated.The minislump, the heat released rate up to 48 h, the pozzolanic activity andthe compressive strength at 2, 7 and 28 are determined. Hydration process is characterized by XRDanalysis and the pore size refinement is accessed by MIP. Results show that both CWs increase the waterdemand with increasing the cement replacement level, and they possesspozzolanic activity after 7 days. At early age, the heat released and the compressivestrength are lower than that of the Portland cement (PC) for all replacementlevels. At 28 days, the pozzolanic reaction significantly improves thecompressive strength. From XRD analysis,it is evident that CW reacts to form AFm phases (hemicarboaluminate at 7-28 andlater transformed to monocarboaluminate) depending on the replacement level andCW used. CH peak reduction due to the pozzolanic reaction appears at 28 days. The reduction of porosity up to 16-24 % of CWreplacement is in accordance with the compressive strength results.