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"Senaratne, Sepani"
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Blockchain and Smart Contracts: A Solution for Payment Issues in Construction Supply Chains
The construction industry has dynamic supply chains with multiple suppliers usually engaged in short-term relationships. Government legislation, novel types of payment agreements, conventional information technology solutions, and supply chain management best practices have endeavoured to solve payment-related financial issues in the construction industry, which are mainly caused by the complexities of the construction supply chain. Nevertheless, payment-related issues persist as one of the key challenges in the industry. Applications of blockchain technology–a trusted, distributed data storing mechanism–along with smart contracts are gaining focus as solutions for complex interorganisational processes. A smart contract is a self-executing script that codifies a set of rules or agreements between multiple parties and runs across the blockchain network. This paper identifies the suitability of blockchain and smart contract technologies in solving payment issues in the construction industry. An expert forum of construction industry stakeholders served as the primary data collection method through a structured questionnaire. The key finding of the paper is that blockchain and smart contract powered solutions can significantly mitigate the payment and related financial issues in the construction industry, including partial payments, nonpayments, cost of finance, long payment cycle, retention, and security of payments.
Journal Article
Exploring Challenges and Strategies in Circular Economy Applications in Modular Construction: The Case in Australia
The construction industry’s transition toward sustainability and the circular economy is vital in reducing its environmental impacts. At the same time, modular construction is gaining wider recognition in the industry. However, studies that apply circular economy principles in modular construction are lacking. This study investigates the challenges and strategies in applying circular economy principles, particularly the 10R principles, in modular construction in Australia. The research utilised qualitative methods such as expert interviews and secondary case studies and analysed data using thematic analysis. The findings reveal that, while rethink and recycle principles are generally implemented, the adoption of the remaining 10R principles is minimal due to limited industry awareness and insufficient initiatives. Case studies highlight challenges such as a lack of technical knowledge, industry engagement, and policy support, as well as the need for strategies such as capacity building, stakeholder collaboration, and government-led initiatives to overcome these barriers. This study contributes to research and practice by identifying key challenges and proposing strategies for the integration of sustainable principles into the Australian modular construction industry, aligning with global sustainability benchmarks and advancing a circular economy. The study emphasises the importance of supportive policies and government schemes to encourage the broader adoption of circular economy practices. Its findings have the potential to shape policy development and influence industry standards, laying a foundation for future studies to deepen our understanding and drive transformative change in the industry.
Journal Article
Policy Mapping for Net-Zero-Carbon Buildings: Insights from Leading Countries
The construction industry is a key contributor to greenhouse gas emissions, with buildings alone accounting for 39% of the global energy-related carbon emissions. Global carbon emissions from building operations increased by 5% in 2021 compared to 2020. However, the United Nations signed the Paris Climate Agreement in 2015 with global leaders, setting a limit to temperature increases below 2.0 °C or 1.5 °C. To achieve this goal, countries have established net-zero targets to reach carbon neutrality by mid-century. However, while some countries are making significant progress, others lag behind. Therefore, this study focuses on evaluating the actions taken by countries toward carbon neutrality, and on developing a policy roadmap for the construction industry to meet the net-zero-carbon commitments. This research adopted a systematic document review, including document analysis. The evaluation of countries’ practices towards achieving net-zero targets reveals both similarities and differences. The policy maps developed can be customised for decarbonising a country’s overall construction industry and building sector. This study provides insights for research, practice, and society, emphasising the importance of achieving net-zero targets through the implementation of policies, roadmaps, plans, and strategies.
Journal Article
Implementing Circular Economy throughout the Construction Project Life Cycle: A Review on Potential Practices and Relationships
The linear economy model that is generally practised in the construction industry is one of the main reasons hindering the achievement of sustainability in construction. Alternatively, the Circular Economy (CE) model is becoming a promising approach to achieve sustainable construction, in which materials and products are circulated at their highest economic value and, thereby, contribute towards mitigating the negative economic, social, and environmental impacts of the construction industry. For a successful transition towards CE in the construction industry, it is important not only to understand CE practices that could be implemented across different stages of the life cycle of construction projects, but also to understand how a particular practice relates to another at those stages. Having limited studies identifying such relationships, this study aims to improve the successful implementation of CE practices in the construction industry by comprehending the practices, along with their relationships, throughout the project life cycle. A qualitative research method consisting of a systematic literature review was adopted using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) framework to identify CE practices. Amongst the identified highly cited CE practices applicable to construction projects, design for disassembly, design for adaptability and flexibility, and design for manufacture and assembly ended up being the most significant ones. Consequently, a relationship matrix was developed, highlighting the relationships among the highly cited practices. The matrix emphasises that practices applied in the design stage relate frequently to ones at the following stages, necessitating projects to start with proper planning. This study ultimately assists construction industry stakeholders in successfully and rationally implementing CE practices throughout the project life cycle while enhancing the value addition on the economy, society, and environment.
Journal Article
Potential Application of Blockchain Technology for Embodied Carbon Estimating in Construction Supply Chains
Carbon emissions are categorised as Embodied Carbon (EC) occurring in the production phase and Operational Carbon (OC) occurring in the operational phase of buildings. The current focus on producing zero-carbon buildings, emphasises reducing OC and ignores the importance of reducing EC emissions. This study focuses on EC. Methods available in EC estimating currently produce estimates that often do not complement each other. This makes it important to develop a robust and accurate methodology for estimating EC. Blockchain is an emerging technology that has significant potential for transaction processing in supply chains. The construction industry being the second least digitalised industry, the adoption of innovative technologies is predominantly important. This paper explores the potential application of blockchain for accurate estimation of EC in construction supply chains. A detailed literature review and expert interviews revealed that, compared to traditional information systems, blockchain systems could eliminate issues in EC estimating highlighting its potential credible application for EC estimating. Scalability was identified as a feature that was lacking in a blockchain system, however, for EC estimating, its impact was identified as minimal. It will be difficult to generalise the findings of the study due to interview based qualitative methodology adopted in this study along with the fact that blockchain is an emerging and fairly new technology. However, a similar process could be followed by other studies to compare blockchain with traditional information systems, to evaluate the suitability of blockchain technology to develop prototype systems.
Journal Article
Circular Economy Business Model in the Construction Industry: A Systematic Review
The construction business environment is becoming competitive and intense, and Business Models (BMs) are receiving considerable attention as potential sources of sustainable survival and growth. Converse to the Linear Economy (LE) model that industry follows, the Circular Economy (CE) model has the potential to create a sustainable construction industry while also creating a sustainable business environment in construction organisations. Nevertheless, in traditional BMs, value is often concentrated on the financial value for the stakeholders; in the Circular Economy Business Model (CEBM), value is seen more broadly by considering a comprehensive range of value chain partners, the environment, and society. Hence, implementing the CE in the construction industry requires reforms in each value chain. Thus, the aim of this paper is to develop a conceptual model for construction organisations’ adoption of CEBM for their organisations. To accomplish this aim, the objectives of this paper are twofold: (i) to define the concept of CEBM and (ii) to map a conceptual Circular Economy Business Model Canvas (CEBMC) that is applicable in the construction organisational context. This research adopted a systematic document review, including a content analysis of selected papers. This study contributes significantly by proposing a CEBMC where construction organisations can successfully transform their businesses from linear to circular environments.
Journal Article
Challenges and Strategies for the Retention of Female Construction Professionals: An Empirical Study in Australia
The construction industry is perceived as an industry that is not viable for females to progress their careers in. Existing research studies focused on retaining senior female construction professionals are lacking. Particularly, the existing challenges and strategies found through a critical literature review were scattered and not specific to the retention of senior construction professionals. Identifying this gap, this study led to an empirical research phase to gather the firsthand experiences of 14 senior female professionals in Australia through semi-structured interviews. Subsequently, the gathered data was analysed through content analysis using NVivo software (2020). This study revealed several barriers, which were categorised into three clusters: culture in construction, disrupted career progression, and difficult working conditions. The results revealed that some barriers were consistent with the broader literature findings, while some were interesting context-specific barriers such as a lack of recognition and respect, a lack of confidence in decision-making, misalignment of childcare and construction hours, and lack of on-site feeding facilities. Similarly, the strategies were also discussed under three categories: to support females to adapt in construction, support them in their return to work from leave, and increase flexible work. Finally, recommendations were provided for individuals, organisations, and the industry to retain female employees in construction. Theoretically, this study advances understanding by identifying barriers and retention strategies specific to senior female construction professionals, framing retention as a multi-level challenge, while practically, the findings inform targeted policies to address gaps in the Australian context and improve gender equity.
Journal Article
Review of Material Passports and Their Application in Industrialised Construction: Enhancing Material Circularity in Construction
Construction industry largely produces long-life, unique, and inflexible products; and combined with dispersed supply chains, it makes material tracking difficult. Thus, to achieve a circular economy (CE) in construction, there is a need for managing material information at the asset level to support reuse and recovery. This study explores the solutions for a CE in construction, and adopts a critical review, and a systematic search and review process. Initially the critical review for CE solutions revealed that maintaining authentic material information via material passports (MPs) and adopting industrialised construction (IC) for resource efficiency and flexibility are the key actions for CE implementation. As initial findings suggested the implementation of MPs in IC as imperative for a CE in construction, it was deemed necessary to develop a framework for MPs’ creation and management in IC. Thus, a further critical review was conducted to explore MPs and IC in detail, and a systematic search and review process extracted the actual information that goes into MPs, which was further categorised under various IC lifecycle processes at different stages of lifecycle, to present the incorporation of MPs into IC. The knowledge of MP processes and information in IC from this review is the vital component for the development of a necessary information management framework for MPs. This study can also be a basis for further research on the application of digital technologies and managerial actions required to realise operational MPs in IC, which is required for material circularity in construction.
Journal Article
Transition from Traditional Knowledge Retrieval into AI-Powered Knowledge Retrieval in Infrastructure Projects: A Literature Review
The transition from traditional knowledge retrieval to artificial intelligence-powered knowledge retrieval signifies a fundamental change in data processing, analysis, and use in infrastructure projects. This systematic review presents a thorough literature analysis, examining the transition of traditional knowledge retrieval strategies from manual-based and statistical models to modern AI methodologies. This study systematically retrieved data from 2015–2024 through Scopus, Google Scholar, Web of Science, and PubMed. This study underscores the constraints of traditional approaches, particularly their reliance on manually generated rules and domain-specific attributes, in comparison to the flexibility and scalability of AI-powered solutions. This review highlights limitations, including data bias, computing requirements, and interpretability in the AI-powered knowledge retrieval systems, while exploring possible mitigating measures. This paper integrates current research to clarify the advancements in knowledge retrieval and discusses prospective avenues for integrating AI technology to tackle developing data-driven concerns in knowledge retrieval for infrastructure projects.
Journal Article