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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Effect of ethylsilicate consolidating agents on behaviour and properties of glaukonitic sandstone used to building of St. Vitus´ Cathedral
 Drdácký, Miloš ; Slížková, Zuzana ; Valach, Jaroslav
This report is focused on testing and evaluating of properties of chosen consolidating agends for concervation of relief bust in external triforium of St. Vitus´ Cathedral on Prague Castle (CZ). All tested agends contained ethyl ester of silicic acid (ethylsilicate) as active ingredient and were one-component. Penetration deepness of agends into sandstone and sandstone properties after application consolidating agends: bending strenght, modulus of elasticity, thermal expansion, vapour water permeability, hygric expansion were observed. The evaluated agends behaviour very similarly and there are no dramatically better or worse agends. All agends penetrate quite well into sandstone and relatively deep and increase strength of sandstone after impregnation.
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