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ECO-SANDWICH ENERGY EFFICIENT, RECYCLED CONCRETE SANDWICH FACADE PANEL Contract number: ECO/11/304438/SI2.626301

D 6.11./2. Press release May 2014


Press release – ECO-SANDWICH® day

Figure 1 ECO-SANDWICH® panel system

Figure 2 ECO-SANDWICH® day

Figure 3 Participants of panel discussion

On 14th of May 2014 at the University of Zagreb, Faculty of Civil Engineering workshop ECOSANDWICH® day was held on themes Energy Efficiency, Sustainable construction and Use of recycling resources in the Croatia. During the workshop European project was introduced together with its product „ECOSANDWICH®, Energy efficient, recycled concrete sandwich facade panel“. ECOSANDWICH® wall panel system was developed by Croatian consortium and funded by the European Commission under Cip Eco-Innovation. ECO-SANDWICH® day was organazied within 5th Energy Week Zagreb with moto „Development we don't want to stop, but pollution we can!“. During the presentation, which were held by prof. Ljubomir Miščević (Faculty of Architecture, University of Zagreb), Bojan Milovanović from University of Zagreb Faculty of Civil Engineering, Juro Božić from EURCO Inc. and Jasna Golubić (presenter of the City of Koprivnica), problems with energy efficiency, construction and demolition waste and ECOSANDWICH® system as a potential solution were discussed.


Today, construction and demolition waste (CDW) as a by-product of human daily and economic activities has become an unavoidable problem. This is caused by the environmental pollution process which is going faster than the natural recovery process as the consequence of industrialization, economic development, but also the disregard of the fact that the eco-system is nearing to its breaking point. Because of the high potential for re-use and recycling embodied in these materials CDW has been identified by the European Commision as a priority stream. Indeed, a proper management would lead to an effective and efficient use of natural resources and the mitigation of the environmental impacts to the planet. The Waste Framework Directive (WFD) requires Member States (MS) to take any necessary measures to achieve a minimum target of 70% (by weight) of CDW by 2020 for preparation for re-use, recycling and other material recovery, including backfilling operations using non-hazardous CDW to substitute other materials. Statistic data shows that Croatia reuses and recycles only 7% of CDW. On the other hand, existing buildings are one of the biggest energy consumers and have great impacts on the environment. The energy efficiency in building is defined by using less energy for space heating and cooling, ventilation, lighting and hot water, without degradation of comfort. Therefore, implement plans for improving energy efficiency is imported in the Croatian legislation through laws and by-laws where most important is Law for energy efficiency use of energy in the final consumption (Official Gazette 152/2008, 55/2012) and the Construction Law (Official Gazette 153/13). The ECO-SANDWICH wall system is an innovative prefabricated ventilated wall panel with integrated core insulation allowing very low energy design and retrofit of buildings. Around 50% of the total aggregate quantity needed for production of concrete layers has been replaced with recycled aggregate obtained from construction and demolition waste. A newly developed mineral wool manufactured using Ecose速 Technology, which uses biobased minerals free from formaldehyde, phenol and petrochemicals, is used as a thermal insulation material. The performed life cycle analysis was made and indicates the potential of the ECOSANDWICH速 wall system in terms of reducing embodied energy and embodied carbon. By comparing the ECO-SANDWICH with a generic EPS-core concrete wall panel, it can be seen that the use of ECO-SANDWICH allows for significant saves - around 46% of embodied energy and around 39% of embodied carbon per panel for a life span of 50 years. Results of thermal properties, concrete containing recycled concrete and recycled brick aggregates have 36 % and 45 % lower thermal conductivity than the reported literature values for the dry concrete with approximately the same density. Concrete sandwich panel has higher thermal mass, 458 kg/m2 that results with very good dynamic thermal properties. There is 25% less energy needed for heating in buildings comparted to lighted buildings and 50 % less energy needed for cooling comparing massive with lighted buildings. The fire resistance testing of ECO-SANDWICH速 panels recommended classification in class EI90 according to norm HRN EN 13501-2: Fire classification of construction products and


building elements – Part 2: Classification using data from fire resistance tests, excluding ventilation services. The aim of the panel discussion was to focus on the public and professional perception of the concrete as sustainable material, barriers and challenges of using sustainable construction material and products in the everyday time, its use during public procurement and legislative barriers. The cooperation of Croatian scientific institutions and industry for developing a new competitive product and there barriers and advantages trough representative example of the consortium ECO-SANDWICH® was discussed. It was concluded that designers and builders are aware of advantages of building with precast panel systems, its better quality and 70% faster construction. Also it was concluded that investors are skeptic over this kind of construction without any rational argument. In the panel discussion there were 50 participants with panelists: project coordinator, prof. Ivan Banjad Pečur PhD., Milan Jokića (Secretory of the Coordination of association of occupant for the Croatia – KUSRH); Danica Jelenić (Director of the Beton Lučko), Jasna Golubić (presenter of the City of Koprivnica) and prof. Ljubomir Miščević (Faculty of Architecture, University of Zagreb). City of Koprivnica presented their activities carried out within project Bold new face of Koprivnica, and its orientation towards building of passive and very low-energy buildings in the form of public procurement. Also there is the strongest incentive of the City of Koprivnica stems from the Decision on the Municipal Contribution to the City of Koprivnica for investors who build passive houses -energy class A+ residential buildings. They receive subsidies of 100% of utility contributions. Also, it was discussed the issue of the co-owners of building apartment in the implementation of energy efficiency projects. Cost comparison was made for construction of building envelope (masonry and ETICS –EPS, masonry and ETICS – mineral wool, reinforces concrete and ETICS – EPS and reinforces concrete and ETICS – mineral wool) for a family house using different construction systems and compared with the ECO-SANDWICH® wall panel. Cost comparison showed that buildings with ECO-SANDWICH® systems is only 9% expensive than buildings made from masonry and ETICS with EPS while it’s cheaper than reinforced concrete with ETISC (mineral wool). Cost comparison was made for passive house with three flats and all cost for envelope construction were included. Throughout cost analyses, it is important to point out the necessary of observation the time as a parameter in order to assess the cost of construction of precast elements, as the ECO-SADNWICH® façade panels, which further lowers the total cost of construction because of 70% faster construction than classical systems construction. Being harmonized with both Energy Performance of Building Directive - EPBD (2002-91-EC), its Recast EPBD II (2010-31-EU) and EU Waste Framework Directive (2008/98/EC), the presented wall system is expected to facilitate the implementation of both legislations by providing a market for recycled CDW and by substantially improving the energy balance of the existing as well as planned building stock.


ECO-SANDWICH® prefabricated concrete wall system achieves sustainable, healthier environment and living ambient for occupants. The wall system helps to follow waste hierarchy by using recycled CDW and recycled materials used in the production of Ecose® based mineral wool, incorporating them into a new, eco innovative and sustainable product with a closed loop. More information about ECO – SANDWICH® can be found in direct contact with the coordinator professor Ivanom Banjad Pečur (banjadi@grad.hr).


ECO-SANDWICH ODRŽIVI PREDGOTOVLJENI ZIDNI PANELNI SUSTAV OD RECIKLIRANOG AGREGATA Broj projekta: ECO/11/304438/SI2.626301

D 6.11./2 Izvješće za medije Svibanj 2014.


Izvješće za medije – ECO-SANDWICH® dan

Slika 1 ECO-SANDWICH® sustav

Slika 2 ECO-SANDWICH® dan

Slika 3 Sudionici panel rasprave

Dana ˝14. svibnja 2014. godine na Građevinskom fakultetu, Sveučilišta u Zagrebu, održan je seminar ECO-SANDWICH® dan s temom „Energetska učinkovitost, održiva gradnja te korištenje recikliranih resursa u Republici Hrvatskoj“, pri čemu je predstavljen europski projekt i sam proizvod: „ECOSANDWICH®, Energy efficient, recycled concrete sandwich facade panel“ koji je osmišljen od strane hrvatskog konzorcija, a financiran od strane Europske komisije u okviru programa CIP Eco-Innovation. ECO-SANDWICH® dan je organiziran u sklopu „5. zagrebačkog energetskog tjedna“ koji se održavao pod motom: „Razvoj ne želimo zaustaviti, ali onečišćenje možemo“. Tijekom predavanja, koje su održali prof. Ljubomir Miščević s Arhitektonskog fakulteta, sveučilišta u Zagrebu; dr.sc. Bojan Milovanović s Građevinskog fakulteta, Sveučilišta u Zagrebu; Juro Božić iz tvrtke EURCO d.d. iz Vinkovaca te Jasna Golubić pročelnica Upravnog odjela za izgradnju grada i upravljanje nekretninama grada Koprivnice, raspravljana je problematika energetske učinkovitosti u zgradarstvu te problematika građevinskog otpada u Republici Hrvatskoj.


Istaknuto je da je u današnje vrijeme građevinski otpad kao nusprodukt dnevne i gospodarske aktivnosti postao nezaobilazan problem, a sve kao posljedica nerazboritog industrijskog, tehnološkog te gospodarskog razvoja koji sve više poprima neodržive značajke. Zbog velikog potencijala za recikliranje i ponovnu upotrebu, građevinski je otpad prepoznat i određen od strane Europske komisije kao jedan od prioritetnih smjerova za financiranje, odnosno prepoznat je kao jedan od prioritetnih problema za rješavanje. Okvirna direktiva o otpadu (Waste Framework Directive – WFD) zahtijeva od zemalja članica da poduzmu sve nužne korake kako bi se postigli zahtjevi da se do 2020. godine poveća recikliranje i ponovna uporaba materijala iz neopasnog građevinskog otpada, pri čemu je Republika Hrvatska preuzela obvezu recikliranja 70% neopasnog građevinskog otpada, dok statistički podaci ukazuju na to da je trenutno stanje takvo da se reciklira manje od 7% građevinskog otpada. S druge strane zgrade su jedan od najvećih potrošača energije te imaju veliki utjecaj na okoliš. U zgradarstvu energetska učinkovitost znači upotrebu manje količine energije za grijanje i hlađenje prostora, ventilaciju, rasvjetu te pripremu tople vode, uz nesmanjenu razinu udobnosti odnosno osjećaja ugode u prostoru. Problematika i sama provedba principa energetske učinkovitosti je uvedena u hrvatsku zakonsku kroz brojne zakone i podzakonske akte, pri čemu su najvažniji Zakon o učinkovitom korištenju energije u neposrednoj potrošnji (NN 152/2008, 55/2012) i Zakon o gradnji (NN 153/13). ECO-SANDWICH® je proizvod razvijen s ciljem smanjenja upotrebe prirodnih resursa, smanjenja energije potrebne za proizvodnju, ugradnju, održavanje te rušenje zgrada, nakon što one koriste minimalnu količinu energije tijekom njezinog korištenja. Od ukupne količine agregata potrebnog za izradu betona, u slučaju ECO-SANDWICH® panela 50% je zamijenjeno s recikliranim agregatom dobivenim od recikliranog betonskog loma, odnosno od reciklirane opeke kao agregata u betonu. Kao toplinsko izolacijski materijal koristi se mineralna vuna izrađena korištenjem Ecose® tehnologije koja umjesto formaldehida koristi prirodne smole kao vezivo, te koristi reciklirane resurse u proizvodnji. Analiza životnog ciklusa potrošnje energije, odnosno emisije CO2eq plinova pokazala je da se za proizvodnju, ugradnju, korištenje, održavanje te razgradnju i recikliranje ECO-SANDWICH® fasadnih panela troši 46% manje energije, odnosno emitira 39% manje CO2eq plinova u odnosu na trenutno najbolje armiranobetonske sendvič panele izrađene s jezgrom od EPS-a koji se nalaze na tržištu, dok se troši 33,8% manje energije nego u slučaju kad se promatraju lagani kompozitni izolacijski paneli izrađeni od aluminija ili pocinčanog lima ispunjeni poliuretanskom izolacijom. Rezultati ispitivanja su pokazali da je toplinska provodljivost betona s recikliranim agregatom je 36%, a betona s recikliranom opekom 45% manja u odnosu na literaturne vrijednosti za betone iste gustoće. Pokazano je da plošna masa ECO-SANDWICH® fasadnog sustava iznosi 458kg/m2 što osigurava vrlo dobre dinamičke toplinske karakteristike sustava, odnosno smanjenje potrebne energije za grijanje za 25% u odnosu na ekvivalentne zgrade građene od laganih građevnih proizvoda, te do 50% smanjenje potrebne energije za hlađenje u slučaju masivnih u odnosu na lagane konstrukcija.


Ispitivanje otpornosti ECO-SANDWICH® zidnih panela na požar pokazalo je da su pod utjecajem standardne krivulje razvoja požara izdržali požar temperature do 1000°C u trajanju više od 90 minuta, odnosno da bi se u daljnjoj razradbi mogli bi se svrstati u razred EI 90. U sklopu panel diskusije dan je fokus na percepciju stručne i opće javnosti o betonu kao održivom materijalu, te o preprekama i izazovima primjene održivih građevinskih materijala i proizvoda u praksi kroz zelenu javnu nabavu i prepreke regulative. Također, diskutirana je suradnja znanstvenih institucija i privrede na razvoju novih proizvoda, te koristi i prepreke koje su se pokazale kroz reprezentativni primjer suradnje unutar konzorcija projekta ECOSANDWICH®. Zaključeno je da su projektanti i izvođači svjesni prednosti gradnje predgotovljenim sustavima posebno njezinu bolju kvalitetu takvih proizvoda i čak do 70% bržu gradnju, dok kod investitora bez određenog razloga postoji određena skepsa prema takvom načinu gradnje. Grad Koprivnica prezentirao je aktivnosti koje provode unutar svog projekta Novo lice Koprivnice, te svoje usmjerenje prema gradnji isključivo pasivnih te vrlo niskoenergetskih zgrada javne nabave, te sustav poticaja za svoje građene kroz oslobođenje od plaćanja komunalne naknade u slučaju gradnje pasivnih kuća na području grada. S druge strane raspravljena je i problematika suvlasnika višestambenih zgrada u provođenju projekata energetske učinkovitosti. U panel raspravi je sudjelovalo više od 50 sudionika ECO-SANDWICH® dana uz paneliste, koordinatoricu projekta prof.dr.sc. Ivanu Banjad Pečur, Milana Jokića (Tajnika Koordinacije udruga stanara RH - KUSRH); Danicu Jelenić (Direktoricu tvrtke Beton Lučko), Jasnu Golubić te prof. Ljubomira Miščevića. Analiza cijene koštanja četiri klasična sustava gradnje, blok opekom te ETICS sustavom (s EPS-m odnosno mineralnom vunom) kao toplinskom barijerom, odnosno armiranim betonom s ETICS sustavom (s EPS-m odnosno mineralnom vunom) te ECO-SADNWICH® fasadnih panela pokazala je da je cijena koštanja gradnje ECO-SANDWICH® sustavom skuplja tek 9 % od najjeftinijeg načina gradnje blok opekom i EPS-om kao toplinskom izolacijom dok je jeftinija od granje armiranim betonom s mineralnom vunom kao toplinskom izolacijom, pri čemu je promatrana pasivna obiteljska kuća s tri stana kao standard gradnje, te se promatrala cijena svih troškova izvedbe vanjske ovojnice zgrade. Pri tome je od izuzetne važnosti naglasiti da je potrebno promatrati i vrijeme kao parametar pri ocjeni cijene koštanja gradnje predgotovljenim sustavima, pa tako i ECO-SADNWICH® fasadnim panelima, što dodatno snižava ukupne troškove gradnje zbog i do 70 % brže gradnje u odnosu na klasične sustave gradnje. Zbog svoje usklađenosti s Direktivom o energijskom svojstvu zgrada (Energy Performance of Building Directive – EPBD 2002-91-EC) i EPBD II (2010-31-EC) te Okvirnom direktivom o otpadu (2008-98-EC), ECO-SANDWICH® fasadni sustav će olakšati njihovu primjenu u građevinskoj praksi.


Korištenjem predgotovljenih zidnih panela sustava ECO-SANDWICH® stvara se tržište za građevinski otpad kao sirovinu, umjesto njegovog odlaganja u prirodu, te se značajno smanjuju potrebe za energijom za grijanje i hlađenje u postojećim zgradama ili u slučaju gradnje novih zgrada. Za sve daljnje informacije o ECO – SANDWICH®-u, možete dobiti u izravnom kontaktu s koordinatoricom projekta: prof.dr.sc. Ivanom Banjad Pečur (banjadi@grad.hr).

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D 6 11 press release no 2  

D 6 11 press release no 2  

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