Influencia de la anisotropía en la caracterización hídrica de la Pizarra de Bernardos
- B. Fernández Revuelta 1
- Luis A. Galán de Frutos 1
- Rafael Fort González 2
- María José Varas Muriel 3
- Mónica Álvarez de Buergo Ballester 3
- 1 Área de Laboratorios y Servicios. Instituto Geológico y Minero de España
- 2 Instituto de Geología Económica (CSIC-UCM). Facultad de Ciencias Geológicas, UCM
- 3 Departamento de Petrología y Geoquímica. Facultad de Ciencias Geológicas, UCM
ISSN: 1576-5172
Ano de publicación: 2008
Título do exemplar: VII Congreso Geológico de España
Número: 10
Páxinas: 1539-1542
Tipo: Artigo
Outras publicacións en: Geotemas (Madrid)
Resumo
In this study, around a hundred of slate specimens were classified in three classes according to their anisotropy, which was determined by measuring the ultrasound propagation velocity along the three spatial directions. Bulk density, open porosity and water absorption at atmospheric pressure were determined in 10 samples of each class, and the capillary water absorption coefficient was characterized for each sample. Open porosity and water absorption at atmospheric pressure increased as it does the anisotropy level. Although the capillary water absorption coefficient of the slate is low, it varies according to the direction in which it is measured and it is mainly dependant on the relative anisotropy index. As a conclusion, the slate durability could be degraded by water absorption depending on the slate arrangement and anisotropy. To maximize durability, it is recommended to measure the slate anisotropy before placing it in the building or structure in order to determine its best arrangement and orientation.