Supply Of Construction Materials Research Articles

Stakeholders’ perceptions of and willingness to pay for circular economy in the construction sector

Adopting Circular Economy practices in the construction industry can help reduce greenhouse gas emissions. However, many barriers exist to adoption, and current perceptions of and willingness to pay for circularity have yet to be quantified. This study seeks to understand the various perceptions of circularity in the construction industry, characterize uncertainties and risks, and identify economic incentives and opportunities that could accelerate circular adoption via an industry survey of three stakeholder groups. 58 stakeholders filled out part of the survey, and 42 stakeholders completed the majority of questions. Real estate developers are willing to pay an average premium of 10% for construction costs if there’s a minimum embodied carbon reduction of 53%. Design and construction professionals and material suppliers were also surveyed. Reasons for adopting circular practices were primarily driven by client, design team, and net zero goals. The results of this survey begin to characterize the economic landscape of what is needed for a circular transition in the built environment.

Insights into centralized procurement for construction material supply chain: a study in Sri Lanka

Insights into centralized procurement for construction material supply chain: a study in Sri Lanka

Providing a framework to optimize the sustainable construction material supply chain with the possibility of horizontal transfers

The application of Supply Chain Management (SCM) principles has gained considerable attention across various industries to enhance operational efficiency and business performance. In the construction sector, SCM can guide managers in strategic planning and foster collaboration with suppliers, leading to more effective project execution. Despite its importance, limited research has focused on designing sustainable supply chains for construction materials under uncertain conditions. This study aims to bridge this gap by introducing a robust optimization framework that incorporates sustainable development criteria, specifically the minimization of harmful environmental effects and the reduction of worker unemployment. Additionally, the research introduces an innovative concept of horizontal transfers between downstream members, which not only reduces supply deficiencies but also indirectly increases profitability for these members. This article is a part of a Doctoral dissertation. It follows a two-step approach. First, suppliers of construction materials are ranked based on sustainable development criteria using a multi-criteria decision-making method. The best-ranked supplier is then integrated into a mathematical model for optimizing the supply chain design. Given the NP-hard nature of the problem, the CPLEX 12.1 solver with the epsilon constraint method is used to solve small-scale models. For larger-scale problems, three meta-heuristic algorithms are developed: multi-objective ant-lion, multi-objective gray wolf, and multi-objective dragonfly. The results show that while both the ant-lion and gray wolf algorithms deliver comparable average performance, the gray wolf algorithm excels in terms of solution time, making it more effective for real-time problem-solving. This makes the gray wolf algorithm the most efficient choice for addressing large-scale, multi-objective supply chain challenges. This research introduces a novel framework for designing sustainable construction supply chains under uncertain conditions. By focusing on criteria such as minimizing harmful environmental effects and reducing worker unemployment, this study addresses key aspects of sustainable development. Additionally, the innovative horizontal transfer mechanism and the insights into algorithmic performance provide valuable contributions to the field, especially for real-world applications in the construction industry.

Analysis of Factors Obstacling Construction Work in the Tojo Una-Una Islands Region

The implementation of construction activities in the island region of Tojo Una-Una Regency tends to be very vulnerable to the risk of delays, even failure, due to obstacles experienced by implementing parties in the field. The aim of this research is to find out the factors that hinder construction work in the island region of Tojo Una-Una Regency and to find out the efforts made by implementing parties to overcome these obstacles. This factor is the biggest factor hampering construction work in the island region of Tojo Una-Una Regency compared to other factors. Efforts made to overcome these obstacles include implementing human resource management for construction workers properly, building a collaborative network with a number of construction material suppliers, acting decisively against owners who are late in making payments, improving the coordination system between contractors and owners, carrying out modernization and regular maintenance of equipment. construction, establishing good communication with the environment around the project, conducting in-depth studies and handling soil stability problems at the project site, and scheduling visits and sending resources to the project site appropriately.

Challenges in construction material supply for post-disaster transport infrastructure recovery: a case study of the 2016 Kaikōura earthquake in New Zealand

PurposeThis paper aims to investigate the challenges faced by the transport infrastructure sector in its civil construction material supply processes, following the 2016 Kaikoura earthquake in New Zealand.Design/methodology/approachA case study approach was adopted, which included on-site observations, semi-structured interviews and literature-based desktop reviews.FindingsThe research findings show that there were supply problems for aggregates, concrete, stormwater pipes and some specialised products for the repair and rebuild of transport facilities. Those supply problems were largely caused by (1) difficulty in predicting material requirements, (2) constrained supply capability, (3) inadequate local freight capacity, (4) legal, cultural and/or environmental considerations on resource exploitation and utilisation, (5) impacts of COVID-19 and (6) ineffective communication and coordination.Research limitations/implicationsFor future research, it is recommended that a comparative analysis of multiple disaster cases be undertaken to further explore the generalisability of the research findings.Originality/valueThe research findings will inform the development of post-earthquake recovery policies and material supply chain operation strategies, in order to expedite the recovery of transport networks if a future earthquake strikes.

IDENTIFYING THE CARBON FOOTPRINT OF FORMWORK MATERIAL DELIVERY IN BUILDING CONSTRUCTION PROJECTS

Sustainable construction is a way of implementing sustainable development of the construction industry and infrastructure through building a better quality of life, and minimizing the use of resources and energy in order to actualize The 2030 Agenda for Sustainable Development. The use of construction materials is one source of carbon dioxide emissions and material delivery is one of the stages in the construction material supply chain that has the potential to cause CO2 emissions, one of which is the use of formwork. Global warming is closely related to carbon footprint. The research was done by surveying the building construction project followed by data processing which aims to find out how much carbon emissions are generated by construction projects in the contracting process, delivery, formwork fabrication process, and the use of tower cranes and find out what factors contribute to the carbon footprint and what processes are most significant in producing carbon footprints. The results show that carbon emissions for 28 floors amounted to 84,815.1037 kg.CO2 and by doing 2 scenarios in which scenario 1 maximizes the carrying capacity of each delivery truck during the delivery process and delivery for all the needs of 1 tower is carried out during the GF floor and first floor work, the resulting carbon emission efficiency is 2289.0626 kg. CO2 and in scenario 2 where the delivery of multiplexes for the needs of only 1 floor, which makes delivery carried out for each floor and makes the delivery distance half the actual distance, the resulting carbon emission efficiency is 4628.7909 kg.CO2.

Improving the transport infrastructure on the federal highway

Rostov-on-Don is located in the central part of Russia. It is a major transport hub. Paths from many regions of Russia intersect here. A route to the southern cities of the country passes through the metropolis, which is especially popular in the summer. Since 2022, the flow of freight and passenger transport from the annexed territories of Russia has increased significantly. The city of Rostov-on-Don plays an important role in the supply of goods, provision of services, as well as the supply of construction materials for the restoration of settlements in the annexed territories. In the Rostov region, great attention is paid to repairing roads to the Lugansk and Donetsk people's republics. High-quality roads and transport links play an important role in the development of new territories in Russia and influence the development of the modern economy. The main entrance/exit to the city is the A-280 highway “Rostov-on-Don - Taganrog - border with the DPR”, which has federal status. The route starts from Rostov-on-Don, namely from the roundabout intersection of Malinovskoye Street and Taganrog Highway, which is located within the city. The purpose of the study is to improve transport infrastructure to improve road safety at this intersection.

An automated crane operation and construction material supply strategy

An automated crane operation and construction material supply strategy

Business Marketing Planning At Simpel Om Platform Company Construction Materials Sector "PT Simpel Om Unggulan"

The development of Indonesian commercial property (PPKom) released by the Department of Statistics of Bank Indonesia (BI) in the first quarter of 2022 welcomes 2022 as the year of revival of the Indonesian property sector. The annual performance (year on year) of the property industry sector (real estate) grew by 1.19% since the end of the COVID-19 pandemic. In addition to property growth, technological developments are increasingly facilitating and accelerating the transaction process, especially electronic shopping transactions (eCommerce). The transition of the Analog to Digital era encourages all business sectors to be more creative in mastering market competition, one of which is in the construction material supply demand sector. PT Simpel OM Unggul with the platform name "Simpel OM" is present as a material supply platform for the construction sector and a liaison between consumers and sellers with a commitment to 1x24 hour delivery and free shipping is the best solution in today's instant era. Simpel OM started marketing activities as an initial business idea in getting opportunities and markets in similar sectors. This is a general form of a linkage of the governance process with the aim of developing a business strategy in obtaining maximum achievement. Determination of goals and objectives, is the initial operational step in determining market segmentation, target consumers, and business positioning to be carried out. Taking all of that into consideration, revenue stream is the final picture that will be obtained from the running of the Company's cycle. The results of marketing analysis and planning of PT Simpel OM Unggul (Simpel OM) include segmentation, targets, positions, and marketing mix, and projected profits that will be obtained from running this business.

Life cycle assessment of waste materials in deep cement mixing for land reclamation in Hong Kong

In recent years, researchers have shown increasing concern on the environmental impact attributed to traditional binders like cement, especially in mega-scale reclamation projects utilizing Deep Cement Mixing (DCM). The substitution of cement with alternative binders derived from construction and demolition waste as well as industrial slag waste is viewed as a potential strategy for mitigating the carbon footprint of this construction sector. In this study, the potential of using ground granulated blast furnace slag (GGBS), steel slag (SS), and waste concrete powder (WCP) to partially replace cement in construction projects involving DCM is assessed based on a case study in Hong Kong. A detailed comparison through Life Cycle Assessment (LCA) is conducted to examine the carbon footprint of alternative binders. Various scenarios that involve substituting cement to different extents with alternative binders generated from waste materials have been considered. The results reveal that the grinding process is the main contributor to the Global Warming Potential (GWP) for GGBS and SS, accounting for over 57% in each case. For WCP, the GWP is distributed across separation, sieving, and loading. Utilizing alternative waste leads to a GWP reduction in all scenarios, primarily due to lower emissions from these secondary raw materials. Overall, substituting 60% of Portland cement with GGBS, SS, or WCP in DCM construction resulted in GWP reductions of 34.7%, 34.5%, and 35.8% of greenhouse gas emissions, respectively. Various transportation scenarios are explored when moving the supply of construction materials from a local to a regional level by considering various material suppliers and the associated transportation distance. The sensitivity analysis highlighted the significant impact of transportation distance on GWP. This underscores the importance of logistics analysis in land reclamation projects and the benefits of integrating alternative binders into DCM projects.

Mathematical Modeling of Split Tensile Strength of Agrostone with Different Bio-fillers

There has been a growing imbalance in the demand and supply of construction materials with increasing prices day by day at an alarming rate due to escalating cost of energy. Quest for a low cost, environmental friendly material has resulted in the development of Agrostone made out of industrial and agricultural waste while saving the environment from solid waste disposal issues. This also contributes for saving the energy required for production of conventional building materials up to 20 per cent thereby reducing the emissions. Agrostone made of different bio-fillers such as water hyacinth, bagasse and grass, satisfy the strength requirements as per Ethiopian construction material standard which is equivalent to a hollow block. The split tensile strength has been evolved through the compression test by adopting the standard test methods of applied for concrete. This paper presents the correlation of the experimental results split tensile strength with the values obtained using various empirical relations existing in the literature for unreinforced concrete. It is found that all these relations have underestimated the results while the experimental results of Agrostone with water hyacinth bio-filler have better correlation with results of relation given by Arioglu et al. This paper also presents mathematical models developed using linear and polynomial regression analysis to predict the split tensile strength of Agrostone. The correlation coefficients from the regression analysis are obtained using the Stats.blue software. It is found that the polynomial equations of degree five and the correlation indicators r and r2 show a strong relation between the independent compressive strength and the dependent split tensile strength. The linear regression also predicts the values with acceptable degree of accuracy. The resultsobtained by developed mathematical models are very close to the experimental within acceptable range of error.

The Optimal Emission Reduction and Recycling Strategies in Construction Material Supply Chain under Carbon Cap–Trade Mechanism

As urbanization continues to expand in China, carbon emissions (CE) from the construction industry and the amount of construction and demolition waste (C&DW) are rapidly increasing. In order to reduce CEs and environmental hazards, this paper constructs a Stackelberg game model to explore the evolution of carbon emissions reduction (CER) and recycling strategies in the construction material supply chain (CMSC) under the carbon cap–trade (C&T) mechanism. The monotonicity analysis on important variables and model comparison simulation are then conducted. The results show the following: (1) A contractor’s green preference positively correlates with the CER level and recycling rate, while the CER cost exerts the opposite effect. (2) The C&T mechanism incentivizes low-emission manufacturers to actively participate in CER. However, excessive carbon trading prices may put high-emitters in a dilemma, making the whole supply chain profitless. (3) The recycler’s decision to recycle C&DW tends to follow the manufacturer’s CER decision. These findings not only help policy makers understand stakeholders’ behavior in CMSC under C&T mechanism, but also provide a basis for the government to formulate CER policies and introduce low-carbon management.

Assessing the Effects of Price Escalation on Building Construction Projects in Adama, Ethiopia

In the Ethiopian construction sector, one key issue is that contemporary building projects demonstrate price escalation. The Management of Cost escalation requires more understanding of its driving forces. Hence, this research aimed to assess the price escalation factors and their effects on building construction projects in Adama, Ethiopia. Through an in-depth literature review and project archives, thirteen (13) possible price escalation-causing attributes and five (5) its effects were identified for this research. Forty-eight (48) self-administered questionnaire survey has been sent to clients, consultants, and contractors that actively participated in Adama city construction projects and forty-three (43) responded. The relative importance index (RII) had computed to rank the price escalation-causing factors and their effects on building projects. The five most significant factors these causing price escalation on building projects were fluctuation in foreign currency exchange rates, an increase in material cost and unstable market conditions, unbalanced demand and supply of construction materials, limitation of construction material producer's capacity, and project schedule changes. While in this study, delayed project progress, cash flow (financing) problems, higher construction projects cost, and increasing disputes between contracting parties were among the utmost significant impact of rising prices happening on building construction in Adama, Ethiopia. To evaluate the respondents' observed level of agreement on the ranking of price escalation factors and their effects, the Spearman rank correlation coefficient with the aid of SPSS version 26 was used. The outcomes were 0.914 among client and consultant, 0.815 with the client and contractor, as well as 0.856 for consultant and contractor on ranking price increase factors, whereas, 0.921 among client and consultant 0.821 with the client and contractor, and 0.975 for consultant and contractor on ranking price increase effects. Therefore, the result implies a positive relationship among respondents towards factors causing price escalation and their effects on building construction projects in Adama city.

Green waste to green architecture: optimizing urban tree systems for renewable construction material supply chains

Green waste to green architecture: optimizing urban tree systems for renewable construction material supply chains

Research on Construction Waste Recycling Subsidy Model Considering Contractor’s Environmental Awareness

Considering the environmental awareness of contractors, this paper constructs a construction material supply chain consisting of the government, a manufacturer, and a contractor, analyzes the decision-making and influencing factors of various stakeholders under no subsidy, contractor subsidy, and manufacturer subsidy, and studies the formulation of subsidy policies for construction waste recycling from the perspective of the government. The results show that: compared with subsidizing the manufacturer, when the government subsidizes the contractor, the recycling rate is lower, and the manufacturer’s profit, consumer surplus, and social welfare are higher. The manufacturer will use the price mechanism to grab government subsidies at this time, which will increase governmental subsidy expenditure. We also show that the recycling cost and the environmental awareness of the contractor affect the decision-making of the government and the manufacturer in different ways. Therefore, the government should analyze the contractor’s environmental awareness and evaluate the manufacturer’s recycling cost before formulating subsidy policies to promote construction waste recycling.

Techno-Economic and Environmental Analysis of Decommissioned Flowline, Umbilical, and Tubular for Breakwaters

This paper presents the application of recycled tubular, flowline, and umbilical in coastal protection structures. Flowline and tubular are found to improve the load resistance capacity of concrete beams. Embedment of flowline, umbilical, and tubular into concrete beams would be beneficial to the structural performance, which do not noticeably alter the initial cracking strength of the concrete beam but will provide good post-cracking resistance. A techno-economic analysis was performed, which revealed that coastal protection concrete structures with decommissioned components accounting for more than 25% of the concrete weight could be both economically viable and environmentally friendly options. Since global warming is the most dominant environmental impact (i.e., 63%), recycling these decommissioned components from offshore structures could impose positive environmental impacts. Given the limited supply of construction materials in the remote coastal area as well as its proximity to decommissioned oil and gas rig sites, these decommissioned components could have great potential for use as construction materials in the coastal areas adjacent to the oil exploration. This preliminary study finds no showstopper for the concept of recycling the mentioned decommissioned components as coastal protection concrete structures from structural performance, environmental impact, and economic perspectives.

An integrated queueing-inventory-routing problem in a green dual-channel supply chain considering pricing and delivery period: a case study of construction material supplier

Abstract The current paper presented a stochastic integrated queueing-inventory-routing problem into a green dual-channel supply chain considering an online retailer with a vehicle-routing problem (VRP) and a traditional retailing channel with an M/M/C queueing system. A mixed-integer non-linear programming model (MINLP) is presented to address the integrated VRP and M/M/C queueing system. The suggested model makes decisions about optimal routing, delivery time interval to customers, number of servers in traditional retailers, inventory replenishment policies, and retailers’ price. For the first time, this model considers two retailing channels simultaneously under different uncertainty, including demand, delivery lead time, service time, and delivery time interval to customers. The inventory model also follows a continuous-time Markov chain. The small-scale test problems are solved using GAMS software. Since the problem is NP-hard, this study conducts a comprehensive comparative analysis of the performance of 13 different metaheuristics. The ant lion optimiser, dragonfly algorithm, grasshopper optimisation algorithm, Harris-hawks optimisation, moth-flame optimisation algorithm, multi-verse optimizer, sine cosine algorithm, salp-swarm algorithm, the whale optimisation algorithm, grey-wolf optimiser, genetic algorithm, differential evolution, and particle swarm optimization are algorithms that were chosen for this study. Comprehensive statistical tests were conducted to evaluate the performance of these methods. Furthermore, the model is executed for construction material producers as a case study. Finally, sensitivity analyses were conducted on crucial model parameters; and managerial insights were recommended.

Factoring construction and demolition waste in the Zambian construction industry

The Zambian Construction Industry (ZCI) is one of the fastest growing sectors in Zambia arising from increased infrastructure development. The ZCI, like elsewhere, is composed of many players including designers, contractors, regulators, manufacturers and suppliers of construction materials. The country has seen an upsurge in Construction and Demolition Waste (CDW) generation due to increased construction activities. However, opportunities for utilizing CDW for sustainable construction and management have been minimal. Most research in developing countries has focused on Municipal Waste Management (MWM) rather CDW. In Zambia, CDW is a challenge in the absence of legislation, guidelines and regulation. In the developed countries, guidelines, legislation and regulation, exist. Sustainable utilization of CDW in Zambia is limited due to inadequate policy guidelines and legislation. The research aimed at estimating the levels of CDW waste generation and utilization, and proposing a framework for sustainable utilization and management of CDW. The research required both qualitative and quantitative data. Primary data was collected through questionnaires, interviews and site visits whilst secondary data was obtained through literature review. The research, conducted in four provinces of Zambia, established that CDW generation rates were mainly in the 1-10% levels and utilization was low, regardless of the type of project. The main cause for such generation levels was poor skills and workmanship. Further, there are no specific policies dealing with CDW in Zambia. A frame work for estimating and quantifying CDW generation over the whole life cycle of a construction project is also proposed.

Investigation of the Critical Factors Influencing Low-Cost Green Sustainable Housing Projects in Iraq

Iraq oil rich country is in the condition of economic chaos and confronting an intense scarcity for the low-cost housing in the capital as migration from the surrounding cities flooded where country poor economic condition has pushed the housing price hiked in cities. Therefore, this study is conducted with aims to determine critical factors affecting the affordable housing in Iraq. Quantitative study consisting close ended questionnaire of four sections cover all critical factors and randomly distributed questionnaire among the construction industry players to determine the objectives of the study. The questionnaire was translated into Arabic/local language so the every responded understand the questions, total distributed questionnaire is 175 and in response 134 received and data is analysed using SPSS software. Study findings shows that sustainable land management, easy and low interest rate loan arrangement to overcome on the financial constraints are the critical problem followed by unsteady or interpreted supply of construction materials, pricing control significantly help to keep lower the cost of affordable housing. Study also concluded that smaller size houses are no longer the key barriers of acceptance to the Iraqi community. Thus, study strongly recommend government stakeholders to develop framework and properly manage the land for housing purpose. Lastly, steady supply chain management for all the essential construction materials such as steel, technology, cement, electrical and sanitary appliance also control the pricing so low-cost housing dream of the people become true.

Analysis on Recycling Channel Selection of Construction and Demolition Waste in China from the Perspective of Supply Chain

Although construction and demolition waste (C&D waste) recycling has been widely regarded as an effective way to save resources, its selection of recycling channels has received little attention. In order to improve the recycling efficiency of C&D waste and promote the process of C&D waste management, we innovatively propose a dual-channel recycling problem of C&D waste from the perspective of supply-chain operation, aiming to study the impact of the selection of recycling channels and the government’s economic intervention on pricing decisions. Specifically, we build in this paper a three-echelon construction material supply chain including a construction contractor, a professional recycling agency, and a building materials manufacturer, considering two modes: the construction contractor does the recycling job alone (as the direct channel) and the construction contractor entrusts the recycling job to the professional recycling agency (as the indirect channel). We use game theory to analyze the optimal decision strategies of the members with or without governmental intervention and the equilibrium strategies are obtained. At the same time, taking Chongqing city as an example, we apply the model to carry out numerical simulation, and the results reveal that greater recycling costs of C&D waste leads to lower profits for the members. When the market capacity of first-class renewable building materials increases, the recycler’s recycling cost of C&D waste decreases, and the remanufacturing cost of recycled materials processed into first-class renewable building materials decreases, the supply-chain members will choose the indirect channel to perform the recycling job. In the case when government intervention exists, the recycling quantity of C&D waste increases, the price of the final products decreases, and both the total profit of the system and the profit of the supply-chain members increase; there is a positive correlation with the government subsidies. The study provides some insights on managerial significance to C&D waste recycling management.