A waste inventory performed prior to a demolition (or refurbishment) provides relevant information about the building and the contained C&DW. Qualities and quantities of the materials present in the building that will be set free along the process are identified, together with information about the location and form of the material. The identification includes information on the hazardousness of the materials (both due to the nature of the material or contaminations occurred during the use of the building).
By adding to this inventory recommendations on how these waste materials can be managed (reuse, recycling and other forms of material recovery, energy recovery or disposal), depending on legal requirements, (local) economics (e.g. value of recycled materials) and location (available (regional) infrastructure), a waste audit is produced. This will make it possible to generate a waste management plan (times, tasks & resources) and the corresponding budget.
The proposed BIM-SD tool is a software tool supporting the user in the pre-demolition audit and C&DW assessment of a selective demolition project. Its main objective is to support the collection and management of information on the existing elements and materials in a building to be demolished, the decision making around the optimal demolition sequence and the management of the subsequent waste streams. Maximizing the recovery rate from buildings will be fostered thanks to the visibility of the present materials in the pre-demolition stage.
More in detail, the BIM-SD tool will ease calculations of inventory experts and/or demolition experts, which nowadays are principally done by hand (or supported by basic tools such as calculation sheets), potentially improving reliability of calculation, facilitating the traceability of materials and quickening the evaluation of alternative demolition/recovery options.
It is expected that the tool can assist both demolition contractors for improving the production of the waste audits which they already perform; and also building owners (and the team commissioned for the design of the corresponding demolition works) in producing reliable waste audits together with projects. Moreover, distribution of the original BIM-model or of the inventoried BIM-model from the building owner to e.g. demolition contractors participating in a tender could happen.
Lessons learnt from practical projects , New products, applications and machinery , Development of design and modelling methods
