000002331 001__ 2331
000002331 005__ 20141118153436.0
000002331 04107 $$acze
000002331 046__ $$k2013-09-11
000002331 100__ $$aHayen, Roald
000002331 24500 $$aRadiocarbon dating of lime mortars, towards a comprehensive approach to separate natural from anthropogenic lime carbonates

000002331 24630 $$n3.$$pProceedings of the 3rd Historic Mortars Conference HMC13
000002331 260__ $$bGlasgow : University of the West of Scotland, 2013
000002331 506__ $$arestricted
000002331 520__ $$2eng$$aDating of mortars by means of radiocarbon dating is thought of being a promising technique for absolute dating of archaeological sites, monumental constructions and decorative finishes. Whenever samples can be collected near to the original external surface, the determination of the 14C age of the atmospheric carbon dioxide bound within the mortar the moment it hardened will reflect its age. Radiocarbon dating of mortars has known some successes over the past decades, certainly where it concerned pure lime putty mortars. Hydraulic lime mortars or lime mortars containing contaminants from a geological provenance, such as (roughly or finely) ground limestone or underburned limestone fragments, or contaminants related to delayed carbonate formation often still prove difficult to date. Radiocarbon dating of mortars generally comprises the acid dissolution of a powdered sample to obtain the 14C ages and stable isotope profiles of successive CO2 increments, which are used to model the interfering effects of the different carbonate sources. As a clear separation of the various carbonates is not necessarily possible, interpretation and stability of the results is not always straightforward. The standard separation technique by chemical reaction is based on tiny differences in bonding energy due to different crystallographic properties of the carbonates. Besides chemical attack, calcination of the lime carbonates is an alternative to release the carbon dioxide. Thermogravimetric analysis is applied to study the release of CO2 of putty lime and different types of limestone by means of step heating as an alternative preparation method for mortar dating.

000002331 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000002331 653__ $$amortar dating, anthropogenic lime, thermal analysis, calcination, step heating

000002331 7112_ $$a3rd Historic Mortars Conference$$cGlasgow, Scotland (UK)$$d2013-09-11 / 2013-09-14$$gHMC13
000002331 720__ $$aHayen, Roald$$iBoudin, Mathieu$$iStrydonck, Mark Van
000002331 8560_ $$ffischerc@itam.cas.cz
000002331 8564_ $$s448282$$uhttp://invenio.itam.cas.cz/record/2331/files/Hayen - Radiocarbon dating of lime mortars, towards a comprehensive approach to separate natural from anthropogenic lime carbonates.pdf$$y
             Original version of the author's contribution as presented on CD, .
            
000002331 962__ $$r2223
000002331 980__ $$aPAPER