CIFICEN 24414
CENTRO DE INVESTIGACIONES EN FISICA E INGENIERIA DEL CENTRO DE LA PROVINCIA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Pozzolanic activity of calcined halloysite-rich kaolinitic clays
Autor/es:
A. TIRONI, F. CRAVERO, A. SCIAN, F. IRASSAR; A. TIRONI, F. CRAVERO, A. SCIAN, F. IRASSAR
Revista:
APPLIED CLAY SCIENCE
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2017 vol. 147 p. 11 - 18
ISSN:
0169-1317
Resumen:
The aim of this study is to determine the pozzolanic activity of clays with high content of halloysite/kaolinite,and to evaluate the influence of halloysite/kaolinite ratio and halloysite morphology in the development ofpozzolanic activity of the calcined clays. For this purpose, three different natural clays from Río Negro Province,Argentine, were selected and completely characterized. After calcined at 700 °C and ground to 80% of particlesize< 45 μm, pozzolanic activity was determined using the electrical conductivity test, the Frattini test and thecompressive strength index. Results show that all calcined clays are classified as high reactive pozzolana. Thepresence of kaolinite and spheroidal halloysite exerts great influence at early ages; while tubular halloysite hasgreater influence in the pozzolanic activity and the compressive strength of mortars at later ages.
