000002230 001__ 2230
000002230 005__ 20141118153437.0
000002230 04107 $$acze
000002230 046__ $$k2013-09-11
000002230 100__ $$aBorges, C.
000002230 24500 $$aRole of aggregates in durability of air lime mortars influence of curing conditions

000002230 24630 $$n3.$$pProceedings of the 3rd Historic Mortars Conference HMC13
000002230 260__ $$bGlasgow : University of the West of Scotland, 2013
000002230 506__ $$arestricted
000002230 520__ $$2eng$$aAncient mortars have proved to be durable and reliable materials even when submitted to severe conditions of salts and high humidity. This study intends to contribute to the rediscovery of the role of aggregate on the durability of lime mortars, namely in terms of its mineralogy and its’ behaviour in different curing conditions with salt water contact. Aerial lime mortars, with a binder: aggregate mass ratio of 1:3, prepared with different types of sands (basaltic, granitic and siliceous) were subjected to saline conditions, with the intent to simulate a maritime environment and sea water spraying. The mortars were analysed by physical, mechanical, mineralogical and microstructural characterisation. The main phases detected in the mortars are related to the minerals of the sands (quartz, feldspar and mica) and the aerial lime (portlandite, calcite and monocarboaluminate and chloroaluminate). The aluminate compounds can be associated to the occurrence of pozzolanic reactions between alumina rich minerals of the sands and the lime. The bulk density is higher in the samples cured in laboratory, with the highest values obtained in mortars with basaltic aggregate. All mortar samples present an increase of bulk density related, according to XRD and TGA-DTA analysis, to the mortars carbonation progress. The results of this work evidence better performance of basaltic sand.

000002230 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000002230 653__ $$aAggregate, air lime mortars, curing conditions, basaltic sand

000002230 7112_ $$a3rd Historic Mortars Conference$$cGlasgow, Scotland (UK)$$d2013-09-11 / 2013-09-14$$gHMC13
000002230 720__ $$aBorges, C.$$iVeiga, R.$$iSilva, A. Santos
000002230 8560_ $$ffischerc@itam.cas.cz
000002230 8564_ $$s694498$$uhttp://invenio.itam.cas.cz/record/2230/files/Borges -Role of aggregates in durability of air lime mortars influence of curing conditions.pdf$$y
             Original version of the author's contribution as presented on CD, .
            
000002230 962__ $$r2223
000002230 980__ $$aPAPER