Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High volume wastes concrete (HVWC)
Various concretes containing high volumes of waste-derived aggregate were investigated for their workability, strength development, hydration of cement, composition and structure. Waste-derived materials included ash from the incineration of urban refuse and sintered coal ash as replacements for fine aggregates, as well as sintered sewage sludge and glass cullet as replacements for coarse aggregates. The compressive strength of the concrete was lower than that of concrete using natural aggregate, but was still 40 N/mm2 or higher at the age of 91 days. The hydration reaction proceeded normally and was not affected by the dissolution of minor and trace elements contained in the waste-derived material. The production of C-S-H can be increased and the deposition of Ca(OH)2 can be reduced by using slag and fly ash. Therefore, it is estimated that the hardened structure of waste-derived concrete did not differ much from that of concrete containing natural aggregate and that the durability was not inferior. The type and quantity of harmful elements leached from the concrete were almost the same as those of ordinary concrete and they meet the emission criteria of water.
High volume wastes concrete (HVWC)
Various concretes containing high volumes of waste-derived aggregate were investigated for their workability, strength development, hydration of cement, composition and structure. Waste-derived materials included ash from the incineration of urban refuse and sintered coal ash as replacements for fine aggregates, as well as sintered sewage sludge and glass cullet as replacements for coarse aggregates. The compressive strength of the concrete was lower than that of concrete using natural aggregate, but was still 40 N/mm2 or higher at the age of 91 days. The hydration reaction proceeded normally and was not affected by the dissolution of minor and trace elements contained in the waste-derived material. The production of C-S-H can be increased and the deposition of Ca(OH)2 can be reduced by using slag and fly ash. Therefore, it is estimated that the hardened structure of waste-derived concrete did not differ much from that of concrete containing natural aggregate and that the durability was not inferior. The type and quantity of harmful elements leached from the concrete were almost the same as those of ordinary concrete and they meet the emission criteria of water.
High volume wastes concrete (HVWC)
Uchikawa, H. (Autor:in) / Hanehara, S. (Autor:in) / Hirao, H. (Autor:in)
1998
15 Seiten, 6 Bilder, 2 Tabellen, 7 Quellen
Aufsatz (Konferenz)
Englisch
Beton , Abfallverbrennung , industrieller Abfall , Recycling , Auslaugung , Umweltschutz , Wasserverschmutzung , Druckfestigkeit , Wasserabbinden von Zement , Erhärten (Zementabbinden) , Kohlenasche , Abfallglas , Zusammensetzung , Schadstoffbelastung , Calciumhydroxid , Porosität , Mikrogefüge , Wasser-Zement-Wert , Porengrößenverteilung
High Volume Wastes Concrete (HVWC)
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