BIMaterial Process Design for Material Building Pass
Point of Departure/Motivation
Building stocks and infrastructures are the largest material stock of industrial economies. As research findings in Regional Substance Flow Analysis indicate, these total material stocks on the global scale are about as large as primary resource stocks in nature.
It is of long-term importance to maintain or frequently recycle these urban stocks, and in consequence to minimize the use of primary resources and thus the dependency on imports. Often, this strategy is labeled “Urban Mining”. The increased application of construction materials with some delay triggers the equivalent increase in solid waste generation. Considering the average lifetime for construction products to be 40 to 50 years, a significant increase in solid waste generation is to be expected within the next decades. The only way to respond to the challenge of landfill shortages can be the consequent increase of recycling rates.
For higher recycling rates, it is vital to have detailed knowledge about the composition of construction wastes. Recyclability changes over time, as it is a function of technological development and resource markets. Recyclability is also determined through design – it is dependable on constructive criteria defining accessibility and separability of building elements (or its parts).
Contents and goals
The early design stages play therefore a crucial role in the waste reduction, the re-usability of the building elements as well as in the increase of recycling potential, through the choice of material, construction and assembly method – therefore the planners and architects bear large responsibility.
Design-centric methods and tools, allowing planning-optimization and compilation of the deconstruction concepts in the design phase are necessary. The goal of this project is to develop an automated procedure for compilation of Material Building Pass, using new digital technologies, such as BIM (Building Information Modelling) in order to provide qualitative and quantitative documentation of the material composition of, and the material distribution within, a building structure.
The building information modeling (BIM) methodology will be used for creation of digital building model as a knowledge-database for compilation of Building Material Passes (MGP). MGP is serving as design optimization tool; as well as for compilation of a deconstruction concept in the design stage (design for deconstruction). A rule base including rule sets (analysis parameters) for BIM supported compilation of MGP will be developed.
A requirement specification for development of BIM-based MGP app is the final aim of the project.
Recyclability is a major criterion of different recent building evaluation methods, unless there is no adequate indicator to evaluate recyclability itself. However, it is evident that MGP is a key means to effective recycling strategies, also regarding the complex material composition of modern buildings.
Building material passes hence should become a standard procedure for certified structures and buildings, and contribute to the development of a secondary raw materials cadastre, a necessary future completion to the Austrian Mineral Resource Plan.
Dr. Iva Kovacic, Institute for Interdisciplinary Building Process Management, TU Wien
Project or cooperation partners
TU Wien, Institute of Water Quality, Resources and Waste Management (TU-FAR)
TU Wien, Institut für interdisziplinäres Bauprozessmanagement
Tel: ´+43 1 58810 21526