%0 Journal Article
%T Interaction of dispersed polyvynil acetate with silicate in finishing materials
%A Runova
%A R. F.
%A Maistrenko
%A A. A.
%J Materiales de Construccion
%D 1996
%I Consejo Superior de Investigaciones Cient¨ªficas
%X This article focuses on the processes of interaction between calcium silicate hydrates and dispersed polyvinyl acetate in tight films with the aim of developing compounds meant for restoration and finishing works. The basis of this development relies on the concept concerning the determining role of the crystal-chemical factor of the silicate phase in the formation of organic-mineral compounds of increased durability. The characteristics of dispersed calcium silicate hydrates are portrayed. The preparation conditions, accounting for the synthesis of the product of submicrocrystalline structure, conforming with the stoichiometry CaO SiO2 =0.8-2.0 have been determined. The interaction has been studied for compounds achieved by mixing ingredients in a rapid whirling mixer, and subjected to hardening at T=20+2 T. With the aid of XRD, DTA and Infra-Red Spectrometry methods the formation process of the sophisticated polymer silicate phase in the material was observed for a period of 90 days. The properties of the film were investigated and its high resistance against the influence of external factors was established. On this basis a conclusion concerning the quite high effectiveness of substituting portland cement with dispersed calcium silicate hydrate in polymer cement compounds has been made. White colour and other various special properties determine the suitability for repair and finishing works on facades of buildings. Este art¨ªculo est¨¢ orientado a estudiar los procesos de interacci¨®n entre los silicatos c¨¢lcicos hidratados y el acetato de polivinilo disperso en capas impermeables, con el objeto de desarrollar compuestos destinados para la restauraci¨®n. El fundamento de estos estudios es determinar el papel que los factores cristaloqu¨ªmicos de las fases silicato tienen en la formaci¨®n de compuestos ¨®rganominerales de elevada durabilidad. Se han descrito las caracter¨ªsticas de los silicatos c¨¢lcicos hidratados dispersos. Se han determinado las condiciones de preparaci¨®n, teniendo en cuenta la s¨ªntesis de los productos de estructura submicrocristalina, de compuestos con una estequiometr¨ªa CaO SiO2 = 0,8-2,0. La interacci¨®n se ha estudiado sobre productos obtenidos por la mezcla, en un molino rotatorio, de los distintos componentes curados a la T = 20+2 oC. A trav¨¦s de DRX, An¨¢lisis T¨¦rmicos (A.T.) y Espectroscopia IR se han estudiado, durante un per¨ªodo de 90 d¨ªas, los procesos de formaci¨®n de una fase pol¨ªmera de silicatos en el material. Se han estudiado las propiedades de la pel¨ªcula de pol¨ªmero y se ha establecido la influencia de factores externos s
%U http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/520/568