FINE RECYCLED CONCRETE POWDER USED AS FILLER AND CEMENT REPLACEMENT IN NEW CONCRETE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F16%3A00302168" target="_blank" >RIV/68407700:21110/16:00302168 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

FINE RECYCLED CONCRETE POWDER USED AS FILLER AND CEMENT REPLACEMENT IN NEW CONCRETE

Popis výsledku v původním jazyce

Re-use of concrete waste is actual problem due to sustainable construction. In 2012 European Union produced 2.5 billion tons of waste and almost 33 % was demolition and construction waste. Many researchers use recycled concrete aggregate instead on natural aggregate. But complete recycling methods, including fines fraction of concrete waste, need to be improve. There are attempts to reuse fines part of concrete waste as raw material for clinker production or thermally activated binder. However, still this procedure consumes significant amount of energy and release CO2. Thus some other methods are needed to utilize fines concrete waste in a sustainable and environmentally-friendly way. One way is applying fines fraction of concrete waste together with fly-ash as a geopolymer binder. In our study we attempt to use fines concrete waste as mechanically activated binder replacement and filler in new concrete. We used recycled concrete powder produced by LAVARIS Ltd. which is activated by high-speed milling process. Since fines concrete waste contains high amount of cement mortar and some cement grains not yet to be fully hydrated, there is possibility to expose their reactive part by high-speed mill. That method can help implement fines concrete waste as partial replacement for ordinary cement and filler. As consequences the environmental impact of concrete waste production and cement production can be reduced.

Název v anglickém jazyce

FINE RECYCLED CONCRETE POWDER USED AS FILLER AND CEMENT REPLACEMENT IN NEW CONCRETE

Popis výsledku anglicky

Re-use of concrete waste is actual problem due to sustainable construction. In 2012 European Union produced 2.5 billion tons of waste and almost 33 % was demolition and construction waste. Many researchers use recycled concrete aggregate instead on natural aggregate. But complete recycling methods, including fines fraction of concrete waste, need to be improve. There are attempts to reuse fines part of concrete waste as raw material for clinker production or thermally activated binder. However, still this procedure consumes significant amount of energy and release CO2. Thus some other methods are needed to utilize fines concrete waste in a sustainable and environmentally-friendly way. One way is applying fines fraction of concrete waste together with fly-ash as a geopolymer binder. In our study we attempt to use fines concrete waste as mechanically activated binder replacement and filler in new concrete. We used recycled concrete powder produced by LAVARIS Ltd. which is activated by high-speed milling process. Since fines concrete waste contains high amount of cement mortar and some cement grains not yet to be fully hydrated, there is possibility to expose their reactive part by high-speed mill. That method can help implement fines concrete waste as partial replacement for ordinary cement and filler. As consequences the environmental impact of concrete waste production and cement production can be reduced.

Druh

D - Stať ve sborníku

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

<a href="/cs/project/TA04031256" target="_blank" >TA04031256: Rozvoj mechanicky aktivovaných materiálů na bázi recyklovaného betonu pro progresivní stabilizované a za studena recyklované konstrukční vrstvy</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Central Europe towards Sustainable Building 2016 - Innovations for Sustainable Future

ISBN

978-80-271-0248-8

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

1320-1324

Název nakladatele

GRADA PUBLISHING

Místo vydání

Praha

Místo konání akce

Prague

Datum konání akce

22. 6. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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