This study proposes a multi-criteria decision analysis (MCDA) framework to optimise sustainable deconstruction strategies for precast concrete buildings. The framework aims to maximise material recovery, minimise environmental impacts and ensure cost-effectiveness, providing stakeholders with an evidence-based tool for decision-making.
The framework integrates the analytic hierarchy process (AHP) and VlseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR) methods to evaluate 18 deconstruction strategies across 4 categories: concrete component removal, reinforcement separation, structural dismantling and material recycling. A case study of a four-storey university building was modelled using DesignBuilder software to simulate material flows and assess performance metrics. Stakeholder input was used to determine criteria weights, balancing environmental, economic and technical dimensions.
Selective removal strategies, particularly staircase dismantling (D3) and wall panel removal (D1), yielded optimal material recovery and cost efficiency while minimising environmental and safety risks. Scenario S1 demonstrated adaptability as an early-stage strategy for precast panel removal.
This framework serves as a practical tool for contractors, policymakers and environmental agencies, enabling the prioritisation of deconstruction strategies that align with sustainability objectives. It supports global climate goals by reducing emissions and enhancing the value of recycled materials.
This study advances sustainable deconstruction by integrating AHP and VIKOR into a cohesive MCDA framework. It offers a practical decision-making tool for contractors, policymakers, and environmental agencies, contributing new insights to the construction industry and supporting global sustainability goals.
