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Frontiers of Engineering Management

ISSN 2095-7513

ISSN 2096-0255(Online)

CN 10-1205/N

Postal Subscription Code 80-905

Front. Eng    2020, Vol. 7 Issue (4) : 528-546    https://doi.org/10.1007/s42524-020-0127-z
RESEARCH ARTICLE
The quality traceability system for prefabricated buildings using blockchain: An integrated framework
Ziyao ZHANG1, Zhenmin YUAN1, Guodong NI1, Han LIN2(), Yujie LU3
1. Institute of Project Management, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
2. School of Information Engineering, Jiangsu Key Laboratory of Auditing Information Engineering, Nanjing Audit University, Nanjing 211815, China
3. Department of Building Engineering, College of Civil Engineering; Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education; Shanghai Institute of Intelligent Science and Technology, Tongji University, Shanghai 200092, China
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Abstract

The quality traceability of precast components has largely affected the widespread adoption of prefabricated buildings. Blockchain technology provides an effective solution to change the centralized storage mode of traditional traceability system and its related disadvantages. In this paper, we propose a framework of quality traceability system for precast components based on blockchain technology. The system framework adopts a hybrid blockchain architecture and dual storage mode, defines three types of smart contracts, and creates an interactive and efficient source tracing query method, which could effectively achieve the goals of decentralization, openness, and non-tamperability, as well as efficient traceability.

Keywords quality traceability      precast components      blockchain      framework     
Corresponding Author(s): Han LIN   
Just Accepted Date: 30 June 2020   Online First Date: 06 August 2020    Issue Date: 02 November 2020
 Cite this article:   
Ziyao ZHANG,Zhenmin YUAN,Guodong NI, et al. The quality traceability system for prefabricated buildings using blockchain: An integrated framework[J]. Front. Eng, 2020, 7(4): 528-546.
 URL:  
https://academic.hep.com.cn/fem/EN/10.1007/s42524-020-0127-z
https://academic.hep.com.cn/fem/EN/Y2020/V7/I4/528
Fig.1  Overall framework of PCQTA system.
Fig.2  Mechanism of PCQTA.
Fig.3  Required data of PCQTA system during production, transport and construction.
Data items Details
Material data Raw materials, model, dosage, steel ratio, additives, strength grade, etc.
PC data Size (length, width, height, volume, etc.), performance (durability, corrosion resistance, compressive strength, flexural strength, etc.), etc.
Manufacture data Manufacturing drawings, production process, operator, etc.
Transport data Traffic plan, lifting equipment, vehicle type, routes, racks, loading and unloading requirements, time, etc.
Stacking data Environment, placement method, maintenance condition, etc.
Hoisting data Hoisting plan, hoisting machinery, hanging point design, etc.
Assembly data Installer, installation steps, important assembly nodes, connection information, key parts control, etc.
Acceptance data Size acceptance, appearance acceptance, process acceptance, etc.
Stage handover data PC code, size, weight, inspection data, feedback, etc.
Tab.1  Corresponding quality-related data uploaded into PCQTA system
Fig.4  Blockchain infrastructure.
Fig.5  Block structure.
Fig.6  PC classification.
Fig.7  Architecture of quality traceability interaction.
Modules Functions/Components/Operations/Designs Necessity level Difficulty level of realization
Interactions Query information Must have Not difficult
Query results display information set Must have Not difficult
Backup database (MemSQL) Should have Easy
IPFS (off-chain) Should have Not difficult
Query frontend and backend server Must have Easy
Filtering capabilities Should have Easy
Functions Quality information retrieval Must have Easy
Trace code generation Must have Easy
Multiple traceability Should have Difficult
Basic information management Should have Easy
Dynamic information management Should have Not difficult
Certification and authorization management Must have Difficult
Blockchain services Hybrid blockchain architecture (public and consortium chains) Must have Very difficult
Hybrid consensus (PoW & PBFT) Should have Difficult
Linked storage structure Must have Not difficult
Certification smart contract Must have Difficult
Classification smart contract Ok if missing Easy
Multiple traceability smart contract Should have Difficult
On-chain and off-chain Nice to have Not difficult
Data filtering Must have Not difficult
Data delete Must have Not difficult
Data analytics Must have Very difficult
Data classification Ok if missing Easy
Dual input mode Nice to have Not difficult
Infrastructure Software (supply chain system) Must have Difficult
Hardware (RFID tag, reader, antenna, middleware) Should have Not difficult
Data collection Must have Not difficult
Tab.2  The necessity level and difficulty level of each object evaluated by two panel members
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