Exploring the Definition of Capacity in Sustainable Construction: A Knowledge Mapping Approach

The global environmental crisis is becoming increasingly severe, and sustainable construction is widely regarded as a key solution for mitigating climate change. Improving sustainable construction capacity is significant and challenging for advancing the development of the sustainable construction industry. Defining "capacity" is the first step in addressing this challenge. However, capacity possesses multidimensional attributes, and current research does not clearly identify its meaning within the sustainable construction domain. This paper aims to provide insights into the definition of capacity in sustainable construction. Specifically, this research aims to identify the core concept, sub-areas, and emerging trends related to capacity within the sustainable construction field. Using Scopus as the database, this study analysed 1,721 global research papers related to the capacity of sustainable construction from the past decade. CiteSpace was employed to generate knowledge maps. Keyword frequencies, bursts, centrality, and clusters were used to identify research hotspots, classifications, and emerging trends. The definition of capacity in sustainable construction focuses on two core aspects: construction performance and construction materials. Key sub-areas of capacity research in this field include green buildings, energy-efficient buildings, and zero-energy buildings. Emerging trends in capacity research within sustainable construction involve energy system optimisation and carbon reduction. This exploration is crucial for understanding capacity in sustainable construction and makes a positive contribution to the sustainability of future construction practices.