Modeling of construction and demolition waste management based on the project life cycle in Indonesia

Abstract

Improper management of construction and demolition waste has massively accumulated waste and has raised concerns over its impact on the environment and natural resources. The aims of this research modeled construction waste management based on the project life cycle, starting from design, procurement, storage, and implementation. The study aims to conduct a more in-depth study related to Construction and Demolition Waste (CDW) management to find the right strategy. The research method was used by identifying variables based on the review literature and compiling questionnaires for 80 construction projects in Indonesia that were randomly selected to be modeled with Partial Least Squares (PLS) tools. Based on specific criteria, existing models and indicators were evaluated against reflective outer models in explanatory research. The final model explains that construction waste has 24 indicators, namely, four at the design stage, eight at the procurement stage, four at the storage stage, and eight at the implementation stage. Based on the initial contextual analysis, the design factors are the main factor causing the waste. However, the final model explains that the construction waste contextually only relates to the implementation stage, but the design and storage stages directly affect the implementation stage. Therefore, strategies in waste management must be carried out, starting with the right design and material storage processes that are by standards to minimize waste at the time of implementation.