scholarly journals 3D Printing Technology Within a Regenerative Construction Framework

2021 ◽  
pp. 245-261
Author(s):  
Odysseas Kontovourkis
Keyword(s):  
3D Printing ◽  
Environmental Impact ◽  
Construction Industry ◽  
Early Stage ◽  
Primary Energy ◽  
Sustainable Construction ◽  
Positive Contribution ◽  
Impact Performance ◽  
Geometrical Complexity ◽  
Traditional Construction

Abstract3D printing (3DP) is considered as a promising technology in construction industry due to a number of advantages that among others include fast and accurate construction, as well as elimination of formworks and material waste. Although 3DP technology is at an early stage of adoption in construction industry, its positive contribution towards a more sustainable construction approach is well acknowledged. Nevertheless, various constraints prevent its further establishment that include among others lack of knowledge among construction actors, premature investigation regarding techniques and material properties, as well as limited work on design optimization, cost, and environmental impact performance analysis. This chapter aims to contribute towards this direction by analysing the 3DP cost and environmental impact of a number of brick units, forming walls with different geometrical complexity. Results show that while walls’ complexity is increased, there are no significant changes in cost, global warming and primary energy consumption. In contrast, through the application of traditional construction processes, the result values would have been increased proportionally to the degree of complexity. This proves the potential of applying the 3DP technique to the construction of any structure at no extra cost and without increasing the environmental impact. Also, it provides an indication of its potential to be included within a regenerative construction framework.

Ontology-Based Interorganizational Knowledge Management in Sustainable Construction Project

2011 ◽  
Vol 243-249 ◽  
pp. 6339-6343
Author(s):  
Guang Bin Wang ◽  
Gui You He ◽  
Li Bian
Keyword(s):  
Knowledge Management ◽  
Construction Industry ◽  
Negative Impact ◽  
Sustainable Construction ◽  
Construction Process ◽  
Application Process ◽  
Process Ontology ◽  
Knowledge Intensive ◽  
Traditional Construction ◽  
Industry Needs

Due to the great negative impact, the construction industry needs to undergo a paradigm shift from traditional construction to sustainable construction. To reach the goal of sustainable development, the construction industry needs to intensify its efforts to move to a knowledge intensive mode. Based on the analysis of e-Cognos and the concept of ontology, this paper proposes that e-Cognos ontology can be applied in the development of sustainable construction process ontology, which is a key part of knowledge management system (KMS). Following this, the application process of ontology-based KMS is analyzed using IDEF0 modeling method. Finally, this paper analyzes interorganizational collaboration model in sustainable project.

scholarly journals 3D Concrete Printing for Sustainable Construction

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6351
Author(s):  
Maria Kaszyńska ◽  
Szymon Skibicki ◽  
Marcin Hoffmann
Keyword(s):  
3D Printing ◽  
Environmental Impact ◽  
Negative Impact ◽  
Rapid Development ◽  
Cementitious Materials ◽  
Sustainable Construction ◽  
Standard Samples ◽  
Negative Environmental Impact ◽  
Extrusion Printing ◽  
Mineral Additives

Despite the rapid development of 3D printing technology for cement composites, there are still a number of unsolved issues related to extrusion printing. One of them is proper mix design that allows for meeting criteria related to the printing of cementitious materials, such as pumpability, buildability, consistency on the materials, flowability and workability, simultaneously incorporating sustainable development ideas. In the case of mixes for 3D printing, the modification of the composition which increases the overall performance does not always go hand in hand with the reduction of negative environmental impact. The article presents the results of tests of eight mixtures modified with reactive and inert mineral additives designed for 3D printing. The mixes were evaluated in terms of their rheological and mechanical properties as well as environmental impact. Initial test results were verified by printing hollow columns up until collapse. Later, the differences between the compressive strength of standard samples and printed columns were determined. In order to summarize the results, a multi-faceted analysis of the properties of the mixes was carried out, introducing assessment indicators for its individual parameters. The article proves that appropriate material modification of mixes for 3D printing can significantly reduce the negative impact on the environment without hindering required 3D printing properties.

scholarly journals Using Waste in Producing Bio-Composite Mycelium Bricks

2020 ◽  
Vol 10 (15) ◽  
pp. 5303
Author(s):  
Jason Maximino C. Ongpeng ◽  
Edward Inciong ◽  
Vince Sendo ◽  
Crizia Soliman ◽  
Adrian Siggaoat
Keyword(s):  
Flexural Strength ◽  
Construction Industry ◽  
Rice Bran ◽  
New Technologies ◽  
Construction Materials ◽  
Mechanical Tests ◽  
Sustainable Construction ◽  
Mycelium Growth ◽  
Traditional Construction ◽  
Average Compressive Strength

One of the major causes of an increase in the consumption of resources is the progress of the construction industry. Although it leads to new technologies, it heavily contributes to global warming. In this study, the use of sustainable construction materials from waste in brick production with mycelium as a binder is investigated. The ability of mycelium, the root fibers of fungi, obtained from microorganisms is used as stabilizing and binding material on bricks. Forty-eight brick specimens from six design mixes were produced with a size of 200 mm length × 90 mm width × 60 mm height. The mechanical tests conducted were compressive and flexural strength. The changes in weight were recorded against its age to monitor the progress of mycelium growth inside the brick specimens. From the test, bricks made from sawdust and rice bran with mycelium had an increase of 31.0% to 38.5% in average compressive strength compared to the non-mycelium bricks, respectively. Furthermore, the bricks with mycelium experienced an increase in both flexural strength and midpoint displacement for all types of bricks (rice bran, sawdust, and clay). These mycelium-induced bricks can reduce the use and consumption of traditional construction materials with enhanced mechanical properties.

scholarly journals AWARENESS, ACTIONS, DRIVERS AND BARRIERS OF SUSTAINABLE CONSTRUCTION IN CHILE

2013 ◽  
Vol 19 (2) ◽  
pp. 272-288 ◽  
Author(s):  
Alfredo Serpell ◽  
Jorge Kort ◽  
Sergio Vera
Keyword(s):  
Construction Industry ◽  
Financial Incentives ◽  
Early Stage ◽  
Integrated Design ◽  
Economic Conditions ◽  
Sustainable Construction ◽  
Construction Firms ◽  
Construction Companies ◽  
Tax Reduction ◽  
Knowledge Barriers

The socio-economic conditions of a country and the overall practices of the construction industry towards Sustainable Construction (SC) are critical factors to define the foundations for developing and carrying out a strategic plan to advance in sustainable construction. This paper reports the results of a study about SC practices currently implemented by construction companies and discusses the level of awareness and knowledge, barriers and drivers of SC that were found in building and infrastructure construction companies. In addition, it analyses the influence of the company size on SC practices. Research results show that Chilean construction firms are in an early stage of the path for achieving SC. Their practices towards SC are highly dependent of the company's size and its core business. Main barriers towards SC are the lack of financial incentives, lack of integrated design, and affordability whereas company's tax reduction incentives related to the level of investment effort on SC would be a key governmental policy to promote sustainability. The results of this study might be particularly useful for other countries, particularly developing ones, and for government policy making.

scholarly journals Fast Setting Binders for Application in 3D Printing of Bio-Based Building Materials

2020 ◽  
Vol 12 (21) ◽  
pp. 8838
Author(s):  
Maris Sinka ◽  
Jelizaveta Zorica ◽  
Diana Bajare ◽  
Genadijs Sahmenko ◽  
Aleksandrs Korjakins
Keyword(s):  
Compressive Strength ◽  
3D Printing ◽  
Environmental Impact ◽  
Construction Industry ◽  
Building Materials ◽  
Raw Materials ◽  
Agricultural Waste ◽  
Setting Time ◽  
Waste Products ◽  
Negative Environmental Impact

The construction industry is one of the largest emitters of CO2 because the production of traditional building materials is highly energy-intensive and uses considerable amounts of raw materials. This research aims to decrease the negative environmental impact of the construction industry by providing biocomposites with a low environmental impact due to their bio-based components and efficient use of the materials through 3D printing. Agricultural waste products—hemp shives—are used in these materials as a filler together with three different types of fast-setting binders—magnesium, calcium sulphoaluminate (CSA) and those that are gypsum-based. The study determines the setting time and compressive strength of these binders, as well as the formation of biocomposites of different densities for different applications; extrusion tests and preliminary life cycle assessment (LCA) are also performed. Results show that biocomposites with hemp shives and fast setting binders have a possible application in 3D printing due to their shape stability and buildability, as well as relatively high compressive strength, which allows for load-bearing use at high densities and thermal insulation use at low densities, although printability at low binder content remains a significant challenge. Preliminary LCA results show that CSA and gypsum binders have the lowest environmental impact from the binders considered.

Optimizing Concrete Mix Design for Application in 3D Printing Technology for the Construction Industry

2017 ◽  
Vol 263 ◽  
pp. 24-29 ◽  
Author(s):  
Refilwe Lediga ◽  
Deon Kruger
Keyword(s):  
3D Printing ◽  
Construction Industry ◽  
Three Dimensions ◽  
Mix Design ◽  
Layer By Layer ◽  
Construction Methods ◽  
Concrete Mix Design ◽  
Concrete Mix ◽  
Traditional Construction ◽  
Concrete Pump

This paper presents an overview of an investigation into the application of additive manufacturing commonly known as 3D printing specifically within the construction industry. 3D concrete printing is a new and innovative way of construction and can be used for the manufacturing of micro to macro high precision construction components. If correctly designed and used, this method has various advantages over traditional construction methods as it creates opportunities to reduce time and cost. A crucial component for success is an optimized concrete or mortar mix to ensure proper feed, placement and hardening during the 3D printing process. A 3D concrete printer uses a chemically altered concrete or mortar mix, which is pumped through a concrete extruder/nozzle that is carefully controlled in three dimensions. This extruder is controlled by a computerised gantry system, and prints components and structures layer by layer. The key components in such a system are therefore a concrete pump, an extruder, an optimized printable concrete mix and a computerised gantry system. The paper will present an investigation into the criteria for an optimum concrete mix design to be used in a 3D concrete printing machine.

Key criteria for selecting green suppliers for construction projects in the UAE

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
AbdulRahman Asaad ◽  
Sameh Monir El-Sayegh
Keyword(s):  
Construction Industry ◽  
United Arab Emirates ◽  
Construction Projects ◽  
Selection Criteria ◽  
Health And Safety ◽  
Sustainable Construction ◽  
Extensive Literature ◽  
Content Type ◽  
Traditional Construction ◽  
Green Suppliers

Purpose This paper aims to identify and assess the key criteria for selecting green suppliers in the United Arab Emirates (UAE) construction industry. Design/methodology/approach A total of 20 criteria were identified and shortlisted through an extensive literature review. These criteria were grouped into four categories: technical and commercial bid, company characteristics, environmental and socioeconomic. A questionnaire was then developed and distributed to construction professionals in the UAE. A total of 39 professionals responded to the survey including contractors, consultants, owners and suppliers. The respondents performed pairwise comparisons among the selection criteria. Data was then analyzed using the Expert Choice Software. Findings The research findings highlighted that the technical and commercial bid category was ranked as the most important with a weight of 0.338, followed by socioeconomic, company characteristics and environmental categories weighing 0.239, 0.225 and 0.199, respectively. The UAE construction professionals also ranked health and safety, material’s quality and tender price as the top three most important criteria when selecting a sustainable supplier. Practical implications This research addresses the lack of literature toward green supplier selection in the UAE. In addition, it assists contractors in selecting the appropriate supplier and promotes sustainable practices in the construction industry. Originality/value Material suppliers play an important role in the successful delivery of construction projects. Selecting the appropriate supplier is of paramount importance to project success. Several methods can be used to evaluate and select the best-fit suppliers. However, the selection criteria in such methods are primarily based on traditional construction projects rather than sustainable construction projects. Recently, there is an increase in the number of sustainable construction projects in the UAE. Therefore, identifying and assessing the key criteria for selecting green suppliers is needed. This paper fills the gap in literature as to selecting green suppliers in construction projects.

Criteria development for sustainable construction manufacturing in Construction Industry 4.0

2020 ◽  
Vol 20 (3) ◽  
pp. 379-400 ◽  
Author(s):  
Faham Tahmasebinia ◽  
Samad M.E. Sepasgozar ◽  
Sara Shirowzhan ◽  
Marjo Niemela ◽  
Arthur Tripp ◽  
...  
Keyword(s):  
3D Printing ◽  
Tensile Stress ◽  
Construction Industry ◽  
Industry 4.0 ◽  
Maximum Tensile Stress ◽  
Advanced Technology ◽  
Sustainable Construction ◽  
Content Type ◽  
House Construction ◽  
Recycled Waste

Purpose This paper aims to present the sustainable performance criteria for 3D printing practices, while reporting the primarily computations and lab experimentations. The potential advantages for integrating three-dimensional (3D) printing into house construction are significant in Construction Industry 4.0; these include the capacity for mass customisation of designs and parameters for functional and aesthetic purposes, reduction in construction waste from highly precise material placement and the use of recycled waste products in layer deposition materials. With the ultimate goal of improving construction efficiency and decreasing building costs, applying Strand7 Finite Element Analysis software, a numerical model was designed specifically for 3D printing in a cement mix incorporated with recycled waste product high-density polyethylene (HDPE) and found that construction of an arched truss-like roof was structurally feasible without the need for steel reinforcements. Design/methodology/approach The research method consists of three key steps: design a prototype of possible structural layouts for the 3DSBP, create 24 laboratory samples using a brittle material to identify operation challenges and analyse the correlation between time and scale size and synthesising the numerical analysis and laboratory observations to develop the evaluation criteria for 3DSBP products. The selected house consists of layouts that resemble existing house such as living room, bed rooms and garages. Findings Some criteria for sustainable construction using 3DP were developed. The Strand7 model results suggested that under the different load combinations as stated in AS1700, the maximum tensile stress experienced is 1.70 MPa and maximum compressive stress experienced is 3.06 MPa. The cement mix of the house is incorporated with rHDPE, which result in a tensile strength of 3 MPa and compressive strength of 26 MPa. That means the house is structurally feasible without the help of any reinforcements. Investigations had also been performed on comparing a flat and arch and found the maximum tensile stress within a flat roof would cause the concrete to fail. Whereas an arch roof had reduced the maximum tensile stress to an acceptable range for concrete to withstand loadings. Currently, there are a few 3D printing techniques that can be adopted for this purpose, and more advanced technology in the future could eliminate the current limitation on 3D printing and bring forth this idea as a common practice in house construction. Originality/value This study provides some novel criteria for evaluating a 3D printing performance and discusses challenges of 3D utilisation from design and managerial perspectives. The criteria are relied on maximum utility and minimum impact pillars which can be used by scholars and practitioners to measure their performance. The criteria and the results of the computation and experimentation can be considered as critical benchmarks for future practices.

scholarly journals Verification of building environmental assessment system for houses

2019 ◽  
Vol 14 (1) ◽  
pp. 55-66
Author(s):  
Iveta Selecká ◽  
Silvia Vilčeková ◽  
Andrea Moňoková
Keyword(s):  
Environmental Impact ◽  
Built Environment ◽  
Environmental Assessment ◽  
Assessment System ◽  
Green Design ◽  
Sustainable Construction ◽  
Sustainable Buildings ◽  
Ecological Conservation ◽  
Negative Environmental Impact ◽  
Traditional Construction

Abstract Sustainable construction and its architecture of buildings seeks to minimize the negative environmental impact of buildings by efficiency in the use of materials, energy, and development space and the ecosystem at large. Sustainable buildings use a conscious approach to energy and ecological conservation in the design of the built environment in cities. This article is devoted to the environmental assessment of three family houses which represent three different material and design solutions. The houses were evaluated through the Slovak building environmental assessment system (BEAS), which has been developed for Slovak conditions at the Faculty of Civil Engineering, TUKE. This study shows that the influence of green design, compared to traditional construction, is important and more beneficial for the practice of designing sustainable buildings. It creates the most comprehensive relationship between the building and its environment and significantly affects building sustainability.

scholarly journals Waste Glass Utilization in Cement-Based Materials for Sustainable Construction: A Review

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 710
Author(s):  
Di Qin ◽  
Yidan Hu ◽  
Xuemei Li
Keyword(s):  
Environmental Impact ◽  
Construction Industry ◽  
Construction Materials ◽  
Resource Depletion ◽  
Waste Glass ◽  
Sustainable Construction ◽  
Research Trend ◽  
Scientometric Analysis ◽  
Split Tensile Strength ◽  
Cement Based Materials

The construction industry has a significant environmental impact, contributing considerably to CO2 emissions, natural resource depletion, and energy consumption. The construction industry is currently trending towards using alternative construction materials in place of natural materials and cement, thereby reducing the environmental impact and promoting sustainability. Two approaches have been used in this review: scientometric analysis and a comprehensive manual review on the waste glass (WG) utilization in cement-based materials (CBMs) as a sustainable approach. Scientometric analysis is conducted to find out the current research trend from available bibliometric data and to identify the relevant publication fields, sources with the most publications, the most frequently used keywords, the most cited articles and authors, and the countries that have made the most significant contribution to the field of WG utilization in CBMs. The effect of WG on the mechanical properties of CBMs was found to be inconsistent in the literature. The inconsistent effects of WG impede its acceptance in the construction sector. This study intends to shed light on the arguments and tries to explain the opposing perspectives. This article summarizes the findings of various research groups and recommends new viewpoints based on the assessment of fundamental processes. The effect of utilizing WG on fresh and hardened properties of CBMs, including workability, compressive strength, split-tensile strength, and flexural strength, are reviewed. Furthermore, the microstructure and durability of composites containing WG are investigated. Different limitations associated with WG use in CBMs and their possible solution are reported. This study will assist researchers in identifying gaps in the present research. Additionally, the scientometric review will enable researchers from diverse regions to exchange novel ideas and technologies, collaborate on research, and form joint ventures.

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