Digital twin and information models in circular economy
Environmentally sound demolition and modernisation of buildings and closing down and demolition nuclear power plants
Building materials correspond to about 50% of all solid waste throughout the world. The new EU waste Directive sets a target of 70% for demolition waste utilisation within the EU. Virtual Design and Construction (VDC) technologies are widely used in new construction. A new service concept Smart Solutions for Demolition and Modernisation buildings helps to control costs and climate impacts in demolition and modernisation projects with information models and digital twins. Digital twin or information model of a building to be demolished helps to value the amount of waste and circularity. Digital Twin of a building requires accurate information of the building. The digital twin can be created from accurate enough building design documents or onsite laser scanning data. For better utilisation of the demolition waste, accurate model is a necessity. Pre-demolition audits and building design documents of an old building do not always give the right information for efficient utilisation of the demolition waste. Digital twin also helps to improve the safety of the demolition work especially in a building including hazardous wastes or radiative compounds such as in a nuclear power plant. Digital visualisation tools such as a digital twin serves also as an efficient co-operation and decision-making platform. A digital twin helps to include the amounts of materials in a building which maximises the circularity of the waste and reduces the amounts of unusable waste fractions. Digitality also helps in risk management as the digital twin, e.g., can include the amounts and location of hazardous materials.