ABSTRACT
As one of the largest industries globally, and given its significant environmental, social, and economic impacts, construction plays a crucial role in sustainability. The use of digital twins offers a possible avenue for enhancing the sustainability of this sector by improving the sustainable decision-making process. However, the challenge is that it is necessary to consider that construction processes are often collaborative and comprise different professionals, such as regulators, architects, engineers, and contractors. As a result, confidentiality, traceability, and security issues may arise as obstacles. Therefore, creating a decentralised and auditable database integrated with the digital twin application is crucial, and it is possible through blockchain technology. In this context, this chapter aims to analyse the potential of digital twins in improving sustainability in the built environment, integrating this concept into the blockchain. The investigation uses the Building Information Modelling (BIM) methodology as a primary data source to develop a building digital twin, focusing on the sustainability assessment of prefabricated modular construction. The digital twin is examined for its benefits in terms of sustainability decision-making throughout the construction lifecycle, ensuring that the assessment is not tampered with due to blockchain application.
