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A platform for research: civil engineering, architecture and urbanism
Recycling of the product of thermal inertization of cement-asbestos for various industrial applications
Recycling of secondary raw materials is a priority of waste handling in the countries of the European community. A potentially important secondary raw material is the product of the thermal transformation of cement-asbestos, produced by prolonged annealing at 1200-1300 deg C The product is chemically comparable to a Mg-rich clinker. Previous work has assured the reliability of the transformation process. The current challenge is to find potential applications as secondary raw material. Recycling of thermally treated asbestos-containing material (named KRY-AS) in traditional ceramics has already been studied with successful results. The results presented here are the outcome of a long termed project started in 2005 and devoted to the recycling of this secondary raw materials in various industrial applications. KRY-AS can be added in medium-high percentages (10 to 40 wt%) to commercial mixtures for the production of clay bricks, rock-wool glasses for insulation as well as Ca-based frits and glass-ceramics for the production of ceramic tiles. The secondary raw material was also used for the synthesis of two ceramic pigments; a green uvarovite-based pigment [Ca3Cr2(Si04)3] and a pink malayaite-based pigment [Ca(Sn,Cr)SiO5]. The latter is especially interesting as a substitute for cadmium-based pigments. This work also shows that KRY-AS can replace standard fillers in polypropylene plastics without altering the properties of the final product. For each application, a description and relevant results are presented and discussed.
Recycling of the product of thermal inertization of cement-asbestos for various industrial applications
Recycling of secondary raw materials is a priority of waste handling in the countries of the European community. A potentially important secondary raw material is the product of the thermal transformation of cement-asbestos, produced by prolonged annealing at 1200-1300 deg C The product is chemically comparable to a Mg-rich clinker. Previous work has assured the reliability of the transformation process. The current challenge is to find potential applications as secondary raw material. Recycling of thermally treated asbestos-containing material (named KRY-AS) in traditional ceramics has already been studied with successful results. The results presented here are the outcome of a long termed project started in 2005 and devoted to the recycling of this secondary raw materials in various industrial applications. KRY-AS can be added in medium-high percentages (10 to 40 wt%) to commercial mixtures for the production of clay bricks, rock-wool glasses for insulation as well as Ca-based frits and glass-ceramics for the production of ceramic tiles. The secondary raw material was also used for the synthesis of two ceramic pigments; a green uvarovite-based pigment [Ca3Cr2(Si04)3] and a pink malayaite-based pigment [Ca(Sn,Cr)SiO5]. The latter is especially interesting as a substitute for cadmium-based pigments. This work also shows that KRY-AS can replace standard fillers in polypropylene plastics without altering the properties of the final product. For each application, a description and relevant results are presented and discussed.
Recycling of the product of thermal inertization of cement-asbestos for various industrial applications
Gualtieri, Alessandro F. (author) / Giacobbe, Carlotta (author) / Sardisco, Lorenza (author) / Saraceno, Michele (author) / Gualtieri, Magdalena Lassinantti (author) / Lusvardi, Gigliola (author) / Cavenati, Cinzia (author) / Zanatto, Ivano (author)
Waste Management ; 31 ; 91-100
2011
10 Seiten, 8 Bilder, 9 Tabellen, 27 Quellen
Article (Journal)
English
Recycling of the product of thermal inertization of cement-asbestos in geopolymers
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Recycling of the product of thermal inertization of cement-asbestos for the production of concrete
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