Recycling thermally detoxified asbestos-cement in stone-wool : an end-less-life material!

Capitani, Giancarlo (author), Vergani, Fabrizio (author), Conconi, Roberto (author), Mrvar, Primož (author), Bombač, David (author), Slemenik Perše, Lidija (author), Oseli, Alen (author), Bizjan, Benjamin (author)

Deactivated (detoxified) asbestos-cement (DAC), i.e. asbestos-cement slates thermally treated at 1100 °C in order to convert the harmful asbestos fibers into non harmful mineral phases, has been successfully mixed with 74.6 wt% quartz sand and up to 63.2 wt% basalt sand, to produce stone wool with mechanical properties and composition competitive with commercial stone wool. The sample with 50 % DAC and 50 % basalt provided the best comparison with commercial stone wool in terms of liquidus temperature (lower than for the other mixtures) and Young’s modulus (higher). Through further composition optimization and utilization of multiple components, we estimate that future batches could utilize 70–75 % of DAC. These promising results and expectations highlight a feasible reuse of DAC as secondary raw material for stone wool production and a possible route to the elimination of a toxic waste from the environment and the preservation of primary raw materials.

• Language: English
• Keywords: stone-wool, asbestos-cement, thermal detoxification, recycling, circular economy
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering; NTF - Faculty of Natural Sciences and Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: 10 str.
• Numbering: Vol. 440, art. 137351
• PID: 20.500.12556/RUL-159744
• UDC: 669
• ISSN on article: 0950-0618
• DOI: 10.1016/j.conbuildmat.2024.137351
• COBISS.SI-ID: 202286339
• Publication date in RUL: 22.07.2024

Record is a part of a journal

• Title: Construction & building materials
• Shortened title: Constr. build. mater.
• Publisher: Scientific & Technical Press
• ISSN: 0950-0618
• COBISS.SI-ID: 25270784

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: kamena volna, azbest, recikliranje