Study on the Use of Recycled Aggregates for the Production of Cementless Pervious Concrete

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00368586" target="_blank" >RIV/68407700:21110/23:00368586 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.iccc-online.org/fileadmin/gruppen/iccc/proceedings/ICCC16_2023_Vol_III.pdf" target="_blank" >https://www.iccc-online.org/fileadmin/gruppen/iccc/proceedings/ICCC16_2023_Vol_III.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Study on the Use of Recycled Aggregates for the Production of Cementless Pervious Concrete

Popis výsledku v původním jazyce

This study focuses on cementless composite materials in pervious concrete. The main objective was to create cementless ternary pastes using ground granulated blast furnace slag (GGBS), co-fired fly ash (CFA), and desulphurization gypsum (DG). These pastes were combined with recycled coarse aggregates or circulating fluidized bed bottom ash (BA) to produce cementless recycled pervious concrete, which can be applied for sustainable and high-quality industrial waste applications in a circular economy. The study used 70% GGBS, 25% CFA, and 5% DG to replace cement in the concrete mixture. This proportion met the initial and final setting time of cement as per ASTM C150. The mixture of cementless binders had the best compressive strength, combined with recycled coarse aggregates to produce cementless recycled pervious concrete, supplemented by BA to improve hardening properties. The results showed that cementless recycled pervious concrete performed worse than cemented pervious concrete in terms of vertical flow rate, unit weight, compressive strength, splitting strength, resistance to sulfate attack, and physical abrasion. However, it had better porosity, permeability, and saturated water absorption. Increasing the weight percentage of recycled coarse aggregates replaced by BA effectively improved compressive strength, splitting strength, sulfate attack resistance, and physical abrasion resistance. The permeability coefficient met the requirement of greater than 0.01cm/s at 10% of BA content.

Název v anglickém jazyce

Study on the Use of Recycled Aggregates for the Production of Cementless Pervious Concrete

Popis výsledku anglicky

This study focuses on cementless composite materials in pervious concrete. The main objective was to create cementless ternary pastes using ground granulated blast furnace slag (GGBS), co-fired fly ash (CFA), and desulphurization gypsum (DG). These pastes were combined with recycled coarse aggregates or circulating fluidized bed bottom ash (BA) to produce cementless recycled pervious concrete, which can be applied for sustainable and high-quality industrial waste applications in a circular economy. The study used 70% GGBS, 25% CFA, and 5% DG to replace cement in the concrete mixture. This proportion met the initial and final setting time of cement as per ASTM C150. The mixture of cementless binders had the best compressive strength, combined with recycled coarse aggregates to produce cementless recycled pervious concrete, supplemented by BA to improve hardening properties. The results showed that cementless recycled pervious concrete performed worse than cemented pervious concrete in terms of vertical flow rate, unit weight, compressive strength, splitting strength, resistance to sulfate attack, and physical abrasion. However, it had better porosity, permeability, and saturated water absorption. Increasing the weight percentage of recycled coarse aggregates replaced by BA effectively improved compressive strength, splitting strength, sulfate attack resistance, and physical abrasion resistance. The permeability coefficient met the requirement of greater than 0.01cm/s at 10% of BA content.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GC22-00987J" target="_blank" >GC22-00987J: Multifunkční necementové kompozity se sníženým dopadem na životní prostředí pro speciální stavební aplikace</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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