Mechanical Behaviour of a Residual Soil from Ignimbrite Rock of São Miguel Island - Azores

• Published in: IOP Conference Series: Materials Science and Engineering
• Main Authors: Pais, Luís Andrade, Maia Carvalho, P. E., Gomes, Ferreira, Cavaleiro, Victor, Malheiro, Ana
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: IOP Publishing 2021
• Subjects: North Atlantic
• Online Access: http://dx.doi.org/10.1088/1757-899x/1203/2/022135; https://iopscience.iop.org/article/10.1088/1757-899X/1203/2/022135; https://iopscience.iop.org/article/10.1088/1757-899X/1203/2/022135/pdf

Abstract Azores consists of nine islands and several islets, located in the North Atlantic to 1600 km from Continental Portugal and is distributed between latitudes 36° 55' to 39° 43' N and longitude 24° 46' to 31° 16' W. Azores archipelago is in a convergence zone of a series of dynamic tectonic structures, that are responsible for seismicity and volcanism, geological and petrological of these islands. The island of São Miguel, an eastern group, in addition to other petrology’s in its geology, has ignimbrite, which is a pyroclastic rock with a dacitic or rhyolitic composition, resulting from the deposition of materials in semi-melting at high temperatures from a pyroclastic flow. At the site of Água D’Alto, the residual soil sample resulting from the ignimbrite alteration was taken and was evaluated with the interest of studying its application or use as construction material. The soil was subjected to physical and chemical classification test, compressibility, and stress-strain behaviour. This material shows good mechanical characteristics, although its chemism is potentially corrosive.