scholarly journals Using Recycled Construction and Demolition Waste Products: A Review of Stakeholders’ Perceptions, Decisions, and Motivations

Recycling ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 31 ◽  
Author(s):  
Salman Shooshtarian ◽  
Savindi Caldera ◽  
Tayyab Maqsood ◽  
Tim Ryley
Keyword(s):  
Construction Projects ◽  
Raw Materials ◽  
The Body ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Waste Products ◽  
Factors Affecting ◽  
Body Of Knowledge ◽  
Behavioural Insights ◽  
Key Stakeholders

While the increasing rate of urbanisation is a critical concern for socio-environmental reasons, this also leads to more extraction of natural raw materials and the generation of significant quantities of construction and demolition (C&D) waste. Although the use of recycled C&D waste products is technically feasible and regulated, and positive application examples are evident, it is still unclear how to engage key stakeholders to leverage this opportunity in construction projects. Previous research has shown that there is some level of resistance to the reuse of recycled C&D waste products in construction projects. This highlights a critical need to identify the roles of key stakeholders and the barriers they face when using recycled C&D materials. This paper therefore investigates the type of stakeholders influencing the use of recycled C&D waste products and the main factors affecting stakeholders’ decisions to use recycled C&D waste products through a systematic literature review. The authors present an emergent enablers and barriers for recycled C&D waste products model and provide commentary on how stakeholders’ perceptions, decision and behaviour influence the use of recycled C&D waste products. The authors also contribute to the body of knowledge with insights into the factors that various stakeholders believe influence the market for recycled C&D waste products and provides a reference point for authorities to consider these behavioural insights for policy reform.

scholarly journals Conceptualising the Circular Economy Potential of Construction and Demolition Waste: An Integrative Literature Review

Recycling ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 61
Author(s):  
Vasilios Papastamoulis ◽  
Kerry London ◽  
Yingbin Feng ◽  
Peng Zhang ◽  
Robert Crocker ◽  
...  
Keyword(s):  
Literature Review ◽  
Circular Economy ◽  
Holistic Approach ◽  
The Body ◽  
Construction And Demolition Waste ◽  
Future Research ◽  
Demolition Waste ◽  
Five Dimensions ◽  
Body Of Knowledge ◽  
Temporal Dimensions

Traditionally, construction and demolition waste (CDW) materials have been considered to be unwanted, surplus, or wastage materials or materials with zero value. Such a conceptualisation only embraces a negative aspect, which underpins the disposal of reusable and recyclable CDW materials in landfills, thus damaging the circular economy and the environment. The scope of this research was to conceptualise the circular economy potential of non-hazardous construction and demolition waste, which can be used as a resource for advancing the circular economy and sustainability in the built environment. Thus, the abbreviation ‘CEPCDR’ is used for this purpose. The study employs an integrative literature review to understand in depth whether the rationale in the existing CDW definitions advocates for the circular economy. Instead, the literature showed that the current definitions mainly support quantitative, economic, or classification needs, respectively. That is because they lack consideration of the dynamic nature of CDW materials, which embraces the spatial and temporal dimensions. The former involves the geographic context in which the CDW phenomenon eventuates, while the latter concerns the lifecycle of materials. This study contributes to the body of knowledge by conceptualising the CEPCDR using a holistic approach that includes five dimensions: the social, economic, environmental, spatial, and temporal perspectives. Furthermore, the study seeks to drive future research in measuring the CEPCDR.

scholarly journals Digital Twins and Road Construction Using Secondary Raw Materials

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Sebastjan Meža ◽  
Alenka Mauko Pranjić ◽  
Rok Vezočnik ◽  
Igor Osmokrović ◽  
Stanislav Lenart
Keyword(s):  
Construction Projects ◽  
Raw Materials ◽  
Road Construction ◽  
Industrial Wastes ◽  
Construction And Demolition Waste ◽  
Small Scale ◽  
Demolition Waste ◽  
Secondary Raw Materials ◽  
Construction Works

Secondary raw materials (SRMs) tend to be a valuable replacement for finite virgin materials especially since construction works (i.e., building and civil engineering work such as road construction) require vast quantities of raw materials. Using SRM originating from recycling a broad range of inorganic waste materials (e.g., mining waste, different industrial wastes, construction, and demolition waste) has been recognized as a promising, generally more cost-efficient, and environmentally friendly alternative to the exploitation of natural resources. Despite the benefits of using SRM, several challenges need to be addressed before using SRM even more. One of them is the long-term durability and little-known response of construction works built using such alternative materials. In this paper, we present the activities to establish a fully functioning digital twin (DT) of a road constructed using SRM. The first part of the paper is devoted to the theoretical justification of efforts and ways of establishing the monitoring systems, followed by a DT case study where an integrated data environment synthesizing a Building Information Model and monitored data is presented. Although the paper builds upon a small scale, the case study is methodologically designed to allow parallels to be drawn with much larger construction projects.

scholarly journals Application of Construction and Demolition Waste in Civil Construction in the Brazilian Amazon—Case Study of the City of Rio Branco

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2247
Author(s):  
Fernando da Silva Souza ◽  
José Maria Franco de Carvalho ◽  
Gabriela Grotti Silveira ◽  
Vitória Cordeiro Araújo ◽  
Ricardo André Fiorotti Peixoto
Keyword(s):  
Mechanical Strength ◽  
Raw Materials ◽  
Amazon Region ◽  
Construction And Demolition Waste ◽  
Recycled Aggregates ◽  
Federal State ◽  
Construction Sites ◽  
Demolition Waste ◽  
Conventional Concrete ◽  
Initial Adhesion

The lack of usable aggregates for civil construction in Rio Branco (capital of Acre, a Federal State in the Amazon region) makes the production and use of recycled aggregates from construction and demolition waste (CDW) an alternative of great interest. In this study, a comprehensive characterization of CDW collected from 24 construction sites of six building types and three different construction phases (structures, masonry, and finishing) was carried out. The fine and coarse recycled aggregates were produced and evaluated in 10 different compositions. The aggregates’ performance was evaluated in four mixtures designed for laying and coating mortars with a total replacement of conventional aggregates and a mixture designed for a C25 concrete with 50% and 100% replacement of conventional aggregates. CDW mortars showed lower densities and greater water retention, initial adhesion, and mechanical strength than conventional mortars. CDW concretes presented lower densities and greater resistance to chloride penetration than conventional concrete, with a small mechanical strength reduction. The recycled CDW aggregates proved to be technologically feasible for safe application in mortars and concrete; for this reason, it is believed that the alternative and proposed methodology is of great interest to the Amazonian construction industry, considering the high costs of raw materials and the need for defining and consolidating a sustainable development model for the Amazon region.

scholarly journals Prequalification in municipal solid waste management public-private partnerships of India

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Tharun Dolla ◽  
Boeing Laishram
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Construction Projects ◽  
Solid Waste Management ◽  
The Body ◽  
Municipal Solid Waste Management ◽  
Civil Infrastructure ◽  
Infrastructure Projects ◽  
Body Of Knowledge ◽  
Study Results

Prequalification (PQ) is a significant process in the selection of private sector for the delivery of civil infrastructure projects.  But, the extant literature, for the most part, focused on PQ of construction projects.  The need for setting proper PQ, i.e., criteria and corresponding limits in public-private partnership (PPP) infrastructure projects, especially municipal solid waste (MSW) projects is still a lacuna in the body of knowledge of Indian PPPs.  To this end, this paper identified PQ criteria using content analysis of the sample of MSW projects. These identified criteria were subjected to regression modeling. These results were compared with the results of well-matured highway sector to draw comparison with MSW projects.  The practical implications are that urban local bodies (ULBs) are but less competent and less uniform in the rationale of setting the PQ criteria and limits.  This paper suggests that lowering the technical and financial PQ limits considering the market orientation will help in bringing more competitive bidders into the bidding.   Since MSW is in a very nascent stage of application of PPP, the study results could lay directions for future project procurement to discern right limits for right project sizes.

scholarly journals Onshore Oil and Gas Design Schedule Management Process Through Time-Impact Simulations Analyses

2019 ◽  
Vol 11 (6) ◽  
pp. 1613
Author(s):  
Daekyoung Yi ◽  
Eul-Bum Lee ◽  
Junyong Ahn
Keyword(s):  
Construction Projects ◽  
Oil And Gas ◽  
The Body ◽  
Management Process ◽  
Design Phase ◽  
Project Schedule ◽  
Schedule Management ◽  
Body Of Knowledge ◽  
Design Activities ◽  
Design Schedule

Korean oil and gas contractors have recently incurred significant losses due to improper engineering performance on EPC (engineering procurement and construction) projects in overseas markets. Several previous studies have verified the significant impact engineering has on EPC construction cost and project lifecycle. However, no literature has studied the time impact engineering has on EPC projects, representing a gap in the existing body of knowledge. To fill this gap, a Monte Carlo simulation was performed with the Pertmaster, Primavera risk analysis software for three sample onshore oil and gas projects. From said simulation of all major EPC critical activities, the authors found that the engineering phase is up to 10 times as impactful as the procurement and construction phases on the overall schedule duration. In assessing the engineering activities, the authors found the piping design activities to have the greatest impact on the overall schedule performance. Using these findings, the authors present a design schedule management process which minimizes the delays of project completion in EPC projects. Said process includes the following six steps: (1) Milestone management, (2) drawing status management, (3) productivity management of engineering, (4) interface management, (5) management of major vendor documents, and (6) work front management. The findings of this paper add to the body of knowledge by confirming the design phase to be the most impactful on the overall project schedule success. Furthermore, the presented design schedule management will aid industry with successfully executing the design phase in a timely manner, including examples from case study projects for a greater understanding.

Key risk factors affecting renewable energy independent power producer (IPP) set-up projects in developing countries

2019 ◽  
Vol 17 (6) ◽  
pp. 1340-1355 ◽  
Author(s):  
Michael Nii Addy ◽  
Stephen Akunyumu ◽  
Barbara Simons
Keyword(s):  
Risk Factors ◽  
Renewable Energy ◽  
Value Chain ◽  
The Body ◽  
Content Type ◽  
Factors Affecting ◽  
Body Of Knowledge ◽  
Set Up ◽  
High Level ◽  
Survey Approach

Purpose Sustained access to efficient electricity plays an essential role in improving living conditions of people and contributes to the economic development of the nation as a whole. Volta River Authority (VRA) mainly manages the generation plants (hydropower sources and thermal plants) alongside independent power producers (IPPs). Power generation in the country has been influenced by myriads of factors. Thus, the purpose of this study is to assess the key risk factors affecting renewable energy of IPPs set-up project in Ghana. Design/methodology/approach Quantitative approach was adopted for the study. Empirical investigation was carried out using the survey approach. The likelihood of occurrence of the risk and the degree of impact of same motivated the use of risk significance index to analyze the data and make deductions from the results. Findings From the study, three key risk factors have high level of severity, which include long and complex procedures for authorization of project activities, stability of the policy environment and ease of obtaining rights to land. These risks could be found in the business/strategic risks and policy/regulatory risks categories, respectively. A total of 25 key risk factors had moderate level of severity and 12 key risk factors have low level of severity on renewable energy IPP set up projects. Practical implications Top-ranked risk factors require maximum attention. The identified risks should be alleviated with strategies to reduce levels of severity by targeting either the likelihood of occurrence or the level of impact. This will serve as a catalyze to promoting renewable energy IPP set-up projects in Ghana. Originality/value Key contribution of the paper to the body of knowledge is demonstrated by the empirical evidence of the risks IPPs are likely to encounter in setting up renewable energy plants in Ghana. The distinctive attribute of this study is further demonstrated by the fact that it focused on the set-up stage, which is a critical stage in the renewable energy provision value chain.

Factors affecting tender price in the Ghanaian construction industry

2017 ◽  
Vol 22 (3) ◽  
pp. 252-268 ◽  
Author(s):  
Ernest Kissi ◽  
Theophilus Adjei-Kumi ◽  
Edward Badu ◽  
Emmanuel Bannor Boateng
Keyword(s):  
Construction Industry ◽  
Structural Equation ◽  
Construction Projects ◽  
Negative Influence ◽  
Positive Influence ◽  
The Body ◽  
Content Type ◽  
Factors Affecting ◽  
Practical Implications ◽  
Structured Questionnaire

Purpose Tender price remains an imperative parameter for clients in deciding whether to invest in a construction project, and it serves as a basis for tender price index (TPI) manipulations. This paper aims to examine the factors affecting tender price in the construction industry. Design/methodology/approach Based on the literature review, nine independent constructs and one dependent construct relating to tender pricing were identified. A structured questionnaire survey was conducted among quantity surveyors in Ghana. Partial least squares structural equation modelling (PLS-SEM) examined the influences of various constructs on tender price development (TPD) and the relationships among TPD and TPI. Findings Results showed that cultural attributes, client attributes, contractor attributes; contract procedures and procurement methods; consultant and design team; external factors and market conditions; project attributes; sustainable and technological attributes; and TPI have a positive influence on tender price, whereas fraudulent attributes exert a negative influence. Practical implications The findings offer construction professionals broader understanding of factors that affect tender pricing. The results may be used in professional decision-making in the pricing of construction projects, as they offer clearer causal relations between how each construct will influence pricing. Originality/value This study adds to the body of construction pricing knowledge by establishing the relationships and degree of influences of various factors on tender price. These findings provide a valuable reference for practitioners.

EXPLORING FACTORS AFFECTING SUPPLY CHAIN RELATIONSHIPS CONSTRUCTION

2020 ◽  
Vol 43 (01) ◽  
Author(s):  
VIET THANH NGUYEN
Keyword(s):  
Supply Chain ◽  
Essential Element ◽  
Influential Factors ◽  
The Body ◽  
Additional Contribution ◽  
Management Support ◽  
Factors Affecting ◽  
Body Of Knowledge ◽  
Supply Chain Relationships ◽  
Trust Business

Managing business relationships between the parties in construction supply chains (CSCs) is the essential element of construction supply chain management (CSCM). Therefore, in order to have success in the CSCM, the relationships between the parties should be noticed. This study aims to identify and discover important factors affecting supply chain relationships in construction. The study identified 12 key factors affecting the supply chain relationships in construction and ranked them according to their degrees of impact. The findings showed that “working relationship”, “top management support”, “trust”, “business attitude”, and “communication” are the five most influential factors. The study can be considered as valuable additional contribution to the body of knowledge relating to the CSCM. The findings could help practitioners to have an insight into the CSCM and obtain success in managing the CSCs.

scholarly journals Utilization of Construction and Demolition Waste, Fly Ash Waste in Autoclaved Aerated Concrete

2020 ◽  
Vol 3 (2) ◽  
Keyword(s):  
Fly Ash ◽  
Aluminum Powder ◽  
Power Plants ◽  
Raw Materials ◽  
Thermal Power ◽  
Construction And Demolition Waste ◽  
Construction Sector ◽  
Demolition Waste ◽  
Concrete Material ◽  
Aerated Concrete

China's industries are rapidly growing, and with that generation of waste is also increasing. Associated environmental concerns over construction and demolition waste, industrial waste such as fly ash generated by thermal power plants need to be utilized in some form. Autoclave aerated concrete is a lightweight material that can be used as an alternative building material; it is widely composed of raw materials such as cement, quicklime, sand, gypsum, and an aerating agent like aluminum powder. In this study, 40% waste will be utilized, Construction waste (5%,10%,15%....40%) and Fly ash (35%,30%,25….0%)respectively, keeping the aerating agent constant at 0.06% that is aluminum powder. The compressive strength of the material will be checked after autoclaving at 2000 temperature and 1Mpa Pressure for 6 hours. The study aims to design an autoclave aerated concrete material and to recycle the waste generated by various industries mainly from the construction sector.

scholarly journals Implication of quality uncertainty on market exchange: The case of seed industry in Kilolo district, Tanzania.

2020 ◽  
Vol 2 ◽  
pp. 31
Author(s):  
Saadan A. Edson ◽  
Adam M. Akyoo
Keyword(s):  
Raw Materials ◽  
Smallholder Farmers ◽  
The Body ◽  
Development Economic ◽  
Quality Uncertainty ◽  
Market Exchange ◽  
Agriculture Sector ◽  
Seed Industry ◽  
Body Of Knowledge ◽  
Increasing Demand

An increasing demand of agricultural intensification and value addition necessitates the use of improved inputs such as improved seed. Smallholder farmers contribute about 70 % of agricultural production in Tanzania. Agriculture sector in Tanzania contributes about 24.1 % of the GDP, 30 % of exports and 65% of industrial raw materials. Thus, agriculture development, economic growth and industrialization are inseparable. Due to the nature of the product, smallholder farmers cannot judge the overall excellence of seed at the time of buying.  This paper assessed quality uncertainty in maize and vegetable seed and its implication for market exchange between farmers and seed sellers in Kilolo district, Iringa Tanzania. The study used a random sample of 130 smallholder farmers and representatives from ten seed companies. Asymmetric information prevails between the two trading sides i.e. sellers and buyers. Moreover, product augmentation is profoundly overlooked whereby most of seed companies have not augmented their products. Despite that genetic and environmental interaction sways crop performance, the paper offers a thorough deduction of the results and its implication on market exchange. This paper adds information in the body of knowledge on how an improved seed can intensify upsurge production of food and industrial raw materials, which is a step towards desired industrialization agenda in Tanzania.

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