Different approaches to date bricks from historical buildings

Abstract

Abstract:The application of Thermally (TL) and Optically (OSL) Stimulated Luminescence on bricks used as building material has allowed solving an chronological issue in the field of historical building dating. The possibility to use one or more methodologies of dating is closely related to the luminescent and granulometric characteristics of the sample. Using some brick samples collected in the church of Sain Seurin in Bordeaux (France), this paper discusses the implications and the possibility to use different approaches and techniques for dating. With this aim luminescence measurements were performed on both polymineral fine grain and quartz inclusion phases extracted from each brick. For Equivalent Dose (ED) and consequently age determination, TL on mixed fine grain fraction (FG), OSL on quartz inclusions (QI) and on mixed fine grain (FG*) fraction, were used. The results obtained suggest the advantage of using OSL technique on fine grain fraction cleaned up by IR stimulation (FG*), but the use of quartz inclusion represents indeed a good alternative.

Dosimetry from OSL and Residual TL with TLD 400

“…Artificial irradiation was performed with 90 Sr-90 Y, calibrated beta sources integrated in the system delivering 6 Gy/min. All measurements were conducted in a nitrogen atmosphere and room red lighting provided by Illford DL10 lamps equipped with Ilford #902 filters [11,12].…”

An interdisciplinary approach for the investigation and dating of Roman thermal buildings: the Indirizzo Baths at Catania, Sicily

“…The samples collection was conducted following the procedure used in historical building dating campaigns [37][38][39]. All the samples were collected during spring, first scraping off the surface layer and then putting the samples in sealed opaque black plastic bags to prevent exposure to light and preserve their natural moisture content [18].…”

A procedure to monitor the critical aspects of the sampling in the authenticity tests by TL

“…This paper represents an improving step in a multidisciplinary project aimed at upgrading the collection phase and at establishing the best procedure in the authenticity tests by Thermoluminescence [1][2][3] of ceramic and terracotta artifacts. In these tests, the sampling represents a fundamental step in which the temperature reached by the sample during the drilling is important, as already assessed in previous research articles.…”