UVODIscrpno i realno definisanje zahteva koji se postavljaju za građevinske materijale, u zavisnosti od funkcije koju u složenom sistemu objekta konkretan materijal ima, kao i tehnički podaci o svim relevantnim karakteristikama, osnov su za pravilan izbor, primenu i ugradnju pogodnih građevinskih materijala. Danas se savremene konstrukcije grade u kombinacijama raznovrsnih, fizički posebnih ali funkcionalno međusobno povezanih materijala, što nameće potrebu da se materijali posmatraju u sprezi s konstrukcijom. Paralelno s tzv. tradicionalnim materijalima, u primeni je čitav niz novih, industrijski proizvedenih materijala, prilagođenih zahtevima i funkcijama savremenog graditeljstva.Iako se danas cementna košuljica-estrih u velikom obimu izvodi primenom "gotovih", fabrički proizvedenih materijala, što predstavlja veliki korak napred, uz koje se najčešće ne dobijaju tehnički listovi s podacima dovoljnim za poznavanje, pravilan izbor i primenu, u okviru klasičnog postupka njihovog izvođenja najčešće se ne propisuju neophodne fizičko-mehaničke, reološke i tehnološke karakteristike datih malterskih kompozicija.Brojna ispitivanja pokazuju da se svojstva cementnih košuljica, koja po definiciji predstavljaju sloj dobro zbijene Mr Rada M. Radulović, dipl.inž.građ.
While creating the sustainable construction systems it is crucial to innovate
in production of construction materials by maximizing recycling and reuse of
the materials during production and use of the buildings. The intention of
this paper is to provide new insights and better understanding of
sustainable oriented innovation in production of construction materials, in
particular substitution of cement in mortar with waste material, fly ash,
bearing in mind its huge negative impact on the environment. Previous
investigations of possible use of fly ash have proven the possibility of its
use for the production of cement for lightweight concrete, bricks, asphalt
fillers, however the use of the fly ash in cement screeds was not
considered. The aim of this work was to examine at first, justification of
substitution of cement in mortar with fly ash due to its newly gained
properties as change of density, compressive strength and water absorption.
In order to take into account aspect of environmental protection the newly
gained mechanical properties of the materials were tested in terms of its
convenience for use in cement screeds.
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