CIFICEN   24414
CENTRO DE INVESTIGACIONES EN FISICA E INGENIERIA DEL CENTRO DE LA PROVINCIA DE BUENOS AIRES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Blended cements with calcined illitic clay: workability and hydration
Autor/es:
J. POKORNY; VIVIANA F. RAHHAL; EDGARDO F. IRASSAR; MARÍA GUILLERMINA MARCHETTI,; MÓNICA A. TREZZA; ALEJANDRA TIRONI; R. CERNÝ; Z. PAVLÍK
Lugar:
La Habana
Reunión:
Conferencia; 2nd International Conference on Calcined Clays for Sustainable Concrete; 2017
Institución organizadora:
LC3
Resumen:
In this paper, the paste workability and hydration progress of blended cements containing different calcinedillitic clays were studied. For blended cements with different replacement percentages, the particle packing, thewater film thickness (WFT) and the flow spread was modelled and measured. Results indicate that blendedcement with ground illitic calcined clays maintain or reduce the packing, so the flow spread of blended cementpastes decrease when the replacement percentage increases. For blended cements with 25% of calcined illiticclay, the early hydration was described by the calorimetric curve, and later the hydration products were analysedby XRD and TG analysis and the pore size distribution (MIP) at 2, 7, 28 and 91 days. Finally, the performanceof blended cements was evaluated by the compressive strength. For blended cements, the hydration products aresimilar to that corresponding to ordinary Portland Cement (OPC) and it also produce a pore size refinement thatimprove the compressive strength at later age.