A Decentralized Framework Integrating BIM 5D and Blockchain for Transparent Payment Automation in Construction

The construction industry faces significant payment processing challenges characterized by delays, disputes, and cash flow constraints affecting contractors. Traditional systems rely on fragmented, paper-based processes lacking transparency and real-time integration between project progress and financial transactions. This paper proposes a decentralized application that integrates BIM 5D capabilities with Solana blockchain technology for automated construction payment processing, called DB5D. The framework consists of several components: a web-based 3D viewer utilizing Autodesk Forge for BIM visualization, construction schedule integration from planning software, Solana blockchain programs using Program-Derived Address (PDA) and Cross-Program Invocation (CPI) for secure payment processing, and decentralized document management through InterPlanetary File System (IPFS) with Content Addressable Archives (CAR) compression. The system enables direct linkage between measurable project progress and automated payments by allowing stakeholders to extract quantities from BIM models, record construction task completion with supporting documentation, and trigger blockchain-based token transfers upon client approval. Comprehensive validation involving construction industry professionals confirms the framework’s practical viability. It demonstrates significant improvements in payment transparency, administrative efficiency, and scalability compared to existing blockchain implementations, while enabling economically feasible micro-payments throughout project lifecycles.