Sustainability Model for Prefabricated Buildings Based on Dual Blockchain

This article investigates decentralized blockchain technology to improve the management of sustainability in prefabricated buildings. By utilizing a public blockchain and a private blockchain together, both real-time recording and management of construction-related data, and contract management-applied automation are accomplished. Smart contracts, Merkle trees, and Proof of Work (PoW) consensus mechanisms guarantee the security, reliability, and transparency of data, especially with respect to those categories including material qualifications, construction progress, and quality inspections. The Hyperledger Fabric platform incorporates encryption technology combined with smart contracts for additionally protecting the privacy of financial data, construction progress, and supply chain data through use of the AES-256 algorithm encryption and strict data audit monitoring controls. Moreover, decentralized blockchain technology improves transparency and controllability of data systems, effectively decreasing the risk of data compromise, and optimizing the management of the supply chain through smart contracts, hash value technology, and other means. Tracking time through the average supply chains is 6.1 s, the average accuracy for fulfillment of contracts is 98.36%, the average success rate for smart contract execution is 98.84%, and the average timeliness of information flow is 95.12%. This article promotes the digital transformation and sustainable development of the construction industry by improving the prefabricated construction sector's capacity for sustainable development and offering fresh concepts for data management and monitoring.