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TitleEstimating the age of lime mortars by luminescence to measure pollution rates
Author(s)Sanjurjo-Sánchez, J.
Alves, C. A. Simões
Lobarinhas, Daniela
KeywordsLuminescence dating
Built environment
Lime mortars
Air pollution
Issue date2013
PublisherTrans Tech Publications
JournalMaterials Science Forum
Abstract(s)Lime mortars can suffer alterations when subjected to gaseous pollutants. Particulate air pollutants can also be deposited and incorporated to the mortar surfaces. Thus, they can be used as pollution tracers allowing us to measure deposition rates of pollutants to compare pollution loads. To calculate deposition rates the absolute age of the studied mortars must be known. Luminescence dating allows estimating the age of lime mortars but involves some partially unsolved problems. Luminescence yields the age of an object from the ratio between paleodose or cumulative radiation dose in the minerals of that object and the annual dose rate of ionizing radiation. The development of optically stimulated luminescence (OSL) in the last years and the application of statistical tools have resulted in the first dating of lime mortars. In this work mortars from old buildings and have been collected from two urban sites (A Coruña, Spain, and Braga, Portugal) to estimate their ages by luminescence. Thus, the mortars could be used as passive samplers to calculate deposition rates and relate these to different pollution loads. Results show partial successful estimates and some related problems in younger mortars are discussed.
TypeConference paper
Publisher version
AccessRestricted access (UMinho)
Appears in Collections:CIG-R - Artigos (Papers)

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