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2014, vol. 57, br. 4, str. 31-42
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Mogućnosti približavanja betonske industrije cirkularnom modelu kroz industrijsku simbiozu
Possibilities in concrete industry towards circular economy through industrial symbiosis
Zavod za materijale, Građevinski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Projekat: Projekat RUCONBAR ECO/10/277317 finansirala je Europska komisija
ANAGENNISI - Innovative Reuse of All Tyre Components in Concrete (EU-H2020 - 603722)
Sažetak
Glavni problemi tradicionalne betonske industrije jesu korištenje velike količine neobnovljivih resursa i emisija stakleničkih plinova tijekom proizvodnje, korištenja i rušenja betonskih konstrukcija. Istovremeno, betonska industrija ima velike potencijale za pozitivan pomak prema održivoj proizvodnji i smanjenju negativnog ekološkog utjecaja. Jedna od mogućih strategija jeste korištenje otpadnih materijala i nusproizvoda iz drugih industrija kao vrijednih sirovina u betonskoj industriji. Ovako zatvaranje kruga moguće je samo ako se u obzir uzmu svojstva pojedinog otpadnog materijala, te se ta svojstva iskoriste prilikom projektiranja betona specijalne namjene, u kojima su ta svojstva poboljšana. Druga strategija je projektiranje betona za određeni razred izloženosti okoliša i njegov životni vijek, tj. optimizacija betona za specifičnu namjeru. Rad prikazuje neke od dostupnih otpadnih i recikliranih materijala u Hrvatskoj, te istraživanja mogućnosti njihove upotrebe u građevinarstvu. Mogućnosti primjene otpadnih i recikliranih materijala su prvo razmatrane u laboratorijskim uvjetima, te su u radu prikazani znanstveni rezultati tih istraživanja. Na temelju znanstvenih istraživanja, ponuđene su neke od mogućnosti primjene takvih materijala u specifične svrhe, gdje oni postaju tehnološki atraktivna alternativa klasičnim betonima. Predstavljeni su rezultati izvornih znanstvenih istraživanja te prototipi proizvoda proizvedeni na temelju tih istraživanja.
Abstract
Major challenges of traditional linear concrete industry are utilisation of large amount of non-renewable resources and significant air emissions during production, utilisation and demolition of concrete structures. At the same time, concrete industry has a high potential for a positive shift towards more sustainable production and lower ecological footprint. One of the strategies is to use waste materials and byproducts from other industries as valuable raw materials in concrete industry. This loop can be closed only by taking into account properties of a certain waste material and using them for preparation of special purpose concrete products, in which these properties are favourable. Other strategy is designing concrete tailored for certain environment and service life, making it optimised for that specific purpose. The paper presents some of the available waste and recycled materials in Croatia and research focused on their potential application in civil engineering. The possibilities of utilisation are first explored in laboratory conditions, with the results presented in this paper as an outcome. Based on the obtained results some of the potential areas of application are proposed, in which concrete prepared with these waste materials becomes alternative to classical concrete. Both original scientific research results are presented, but also prototype of products produced based on the scientific research.
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