CIFICEN   24414
CENTRO DE INVESTIGACIONES EN FISICA E INGENIERIA DEL CENTRO DE LA PROVINCIA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Effect of thermal treatment on pozzolanic activity of excavated waste clays
Autor/es:
RAMÍREZ, JOSE H.; TIRONI, ALEJANDRA; YANGUATIN, HERNAN; TOBÓN, JORGE I.
Revista:
CONSTRUCTION AND BUILDING MATERIALS
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2019 vol. 211 p. 814 - 823
ISSN:
0950-0618
Resumen:
Samples of excavated waste clays were characterized byX-ray fluorescence, laser granulometry, specific surface area, X-raydiffraction, and thermo-gravimetric analysis. Excavated clays were calcined at550 ºC and 650 ºC in order to investigate their potential pozzolanic activity. Theeffect of thermal activation also was determined by factorial experiments withtwo factors in randomized complete blocks. Pozzolanic activity was evaluated bycalcium hydroxide fixation, the Frattini test and the compressive strength at 7and 28 days. The results indicate that calcined excavated clays at 650 ºCpresented pozzolanic activity at 7 days and showed an increase percentage ofcompressive strength on average 13%.