Bustamante, R.; Vazquez, P.; Prendes, N. Properties of the Ignimbrites in the Architecture of the Historical Center of Arequipa, Peru. Appl. Sci.2021, 11, 10571.
Bustamante, R.; Vazquez, P.; Prendes, N. Properties of the Ignimbrites in the Architecture of the Historical Center of Arequipa, Peru. Appl. Sci. 2021, 11, 10571.
Bustamante, R.; Vazquez, P.; Prendes, N. Properties of the Ignimbrites in the Architecture of the Historical Center of Arequipa, Peru. Appl. Sci.2021, 11, 10571.
Bustamante, R.; Vazquez, P.; Prendes, N. Properties of the Ignimbrites in the Architecture of the Historical Center of Arequipa, Peru. Appl. Sci. 2021, 11, 10571.
Abstract
The petrographic and petrophysical characteristics of three varieties of ignimbrites used in the architectural heritage of Arequipa (southwest Peru) are analyzed. The modal classification QAFP and TAS diagram discriminate their dacitic nature. Mercury injection porometry revealed very high porosity: 46.5% for white and beige ignimbrites and 35.5% for the pink variety. Ignimbrites contain intrusions of vulcanodetrital fragments and vacuoles that influence their predominantly non-linear mechanical behavior. Results of water absorption by capillarity (C) and ultrasound pulse velocity (UPV) demonstrated a slight anisotropy for the beige variety and near isotropy for white and pink ignimbrites, which justify the randomness of the application of the ashlars in the masonry and in the selection of the faces to carve. Surfaces with hollows in the white and beige ignimbrites are the result of the erosion of the acicular pumice that fills the vacuoles.
Keywords
ignimbrite pe; petrography; physico-mechanical properties; color; cultural heritage
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
