Protecting recycled material from asbestos - identifying and removing asbestos as a contaminant from construction and demolition waste to protect recycled material (RECBest)
Recent years have witnessed an increase in the disposal of mineral building materials containing asbestos. The overall aim of the project is to rethink and outline a safe process for contaminated building stock including obtaining data, conducting renovation and demolition work (deconstruction) through to recycling and residual waste disposal.
The recycling process is intended to generate a high level of separation, i.e. as little contaminated residual material as possible and recycling material of the highest possible quality. Current approaches to obtaining data, conducting renovation and demolition work as well as recycling are to be further developed with a focus on building materials with difficult-to-separate loads (concrete/asbestos concrete composite). Specifically, it is intended to:
A) Establish separation methods for asbestos products in various states (compound types, degree of destruction) and of asbestos fibers per se in bulk streams such as soils (contaminated sites), construction debris (contaminated sites), concrete demolition with asbestos concrete (e.g., spacers), exhaust air and flue gas (incineration), powders (gypsum, cement), and bulk materials (RCM, construction debris);
B) Investigate the possibilities for retaining harmless asbestos fiber contents in recycled building materials or building products for suitable use. This process should also include identifying suitable monitoring of asbestos levels in the building stock cycle as a whole;
C) Review, evaluate and further develop for monitoring existing test methods with sample preparation and analytics and further or varying analytical methods based on different substance streams;
(D) Design a monitoring program to effectively safeguard recycled products.
In addition to TU Berlin, the following partners are also involved in this collaborative research project within the framework of the ReMin (Resource Efficient Circular Economy - Construction and Mineral Material Cycles) research initiative: WESSLING GmbH (coordinator), Kluge Sanierung GmbH, Buhck Umweltservices GmbH & Co. KG, supported by associate partners REMEX Mineralstoff GmbH, Bundesverband der Deutschen Entsorgungs-, Wasser- und Rohstoffwirtschaft e. V. (BDE), Bundesvereinigung Recycling-Baustoffe e. V. (BRB), Gesamtverband Schadstoffsanierung e. V. (GVSS) and ContrinoConsulting – Ingenieurbüro Bau und Umwelt.
Within the project, the Chair of Building Physics and Building Constructions researches the material flows currently available at the end of a building's life cycle and conducts an ecological and economic analysis of recycling routes.