Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Fates of end-of-life concrete and their economic implications
End-of-Life (EoL) concrete constitutes the largest stream of the construction and demolition waste (CDW), therefore the recycling of EoL concrete is essential to divert the CDW from landfills. Annually, around 10 million tonnes of EoL concrete arises in the Netherlands, of which 97% is recycled as aggregates for road base construction through dry process and less than 3% is recycled for concrete aggregates through wet process. Due to the renewal of the aging building stock in the Netherlands, the annual generation of EoL concrete is expected to double in the coming decade but the demand for recycled aggregates in road base will not be much different from the current level due to the saturated Dutch infrastructure system. Without technology innovation, significant amount of surplus EoL concrete will have to be recycled into concrete aggregates through expensive wet processes. The increasing expense for EoL concrete might discourage the on-site separation practice so that the EoL concrete along with other recyclables might mix together and end up in the landfills. With the breakthrough of ADR (advanced dry recovery) technology, C2CA provides an option to recycle the EoL concrete for high application as clean aggregates for concrete production and calcium-rich fines for cement production. Based on the data collected in the C2CA project, the different fates for EoL concrete are modeled and the associate economic implications are calculated.
Fates of end-of-life concrete and their economic implications
End-of-Life (EoL) concrete constitutes the largest stream of the construction and demolition waste (CDW), therefore the recycling of EoL concrete is essential to divert the CDW from landfills. Annually, around 10 million tonnes of EoL concrete arises in the Netherlands, of which 97% is recycled as aggregates for road base construction through dry process and less than 3% is recycled for concrete aggregates through wet process. Due to the renewal of the aging building stock in the Netherlands, the annual generation of EoL concrete is expected to double in the coming decade but the demand for recycled aggregates in road base will not be much different from the current level due to the saturated Dutch infrastructure system. Without technology innovation, significant amount of surplus EoL concrete will have to be recycled into concrete aggregates through expensive wet processes. The increasing expense for EoL concrete might discourage the on-site separation practice so that the EoL concrete along with other recyclables might mix together and end up in the landfills. With the breakthrough of ADR (advanced dry recovery) technology, C2CA provides an option to recycle the EoL concrete for high application as clean aggregates for concrete production and calcium-rich fines for cement production. Based on the data collected in the C2CA project, the different fates for EoL concrete are modeled and the associate economic implications are calculated.
Fates of end-of-life concrete and their economic implications
Hu, Mingming (Autor:in) / Maio, Francesco di (Autor:in) / Lin, Xi (Autor:in) / Roekel, Eric van (Autor:in)
2012
9 Seiten, 5 Bilder, 1 Tabelle, 4 Quellen
Aufsatz (Konferenz)
Englisch
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