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 Bloques de Tierra Comprimida (BTC) estabilizados con cal y cemento. Evaluación de su impacto ambiental y su resistencia a compresión

2020 ◽  
Vol 10 (2) ◽  
pp. 70-81
Author(s):  
Santiago Pedro Cabrera ◽  
Yolanda Guadalupe Aranda-Jiménez ◽  
Edgardo Jonathan Suárez-Domínguez ◽  
Rodolfo Rotondaro
Keyword(s):  
Compressive Strength ◽  
Environmental Impact ◽  
Portland Cement ◽  
Life Cycle Analysis ◽  
Negative Impact ◽  
Santa Fe ◽  
Compressed Earth Blocks ◽  
Earth Blocks ◽  
Negative Environmental Impact ◽  
The City

This work presents the evaluation of the environmental impact and compressive strength of Compressed Earth Blocks (CEB) stabilized with hydrated aerial lime and Portland cement. For this, 12 series of blocks stabilized with different proportions of lime and cement were manufactured and the Life Cycle Analysis (LCA) methodology was used. After conducting these assays and simulations, it could be concluded that, using earth and sand typical of the city of Santa Fe (Argentina), stabilized with certain percentages of Portland cement between 5 and 10% in weight, CEB can be produced with sufficient levels of strength for them to be used in load-bearing walls, in this way minimizing the negative environmental impact associated with their manufacturing. It is also concluded that the stabilization with aerial lime does not increase the CEB’s compressive strength and, on the contrary, significantly increases their negative impact on the environment.

The Improvement of Environmental Performance in the Nonprofit Sector Through Informatics

2011 ◽  
pp. 359-376
Author(s):  
Konstantinos G. Papaspyropoulos ◽  
Athanassios S. Christodoulou ◽  
Vaios Blioumis ◽  
Kyriakos E. Skordas ◽  
Periklis K. Birtsas
Keyword(s):  
Time Series ◽  
Environmental Impact ◽  
Environmental Performance ◽  
Negative Impact ◽  
Nonprofit Sector ◽  
Policy Decision ◽  
Cointegration Analysis ◽  
Environmental Data ◽  
Policy Decision Making ◽  
Negative Environmental Impact

The purpose of the present chapter is to demonstrate how an econometric application supported by the use of simple software can augment an environmental nonprofit organization’s (ENPO) environmental performance. An ENPO, whose scope of operation is the protection of natural resources, usually deals with the problem of how to reduce its negative environmental impact without sacrificing the positive one resulting from its work. This chapter argues that the application of cointegration analysis on available time series environmental data can offer an indication for the policy decision-making in terms of such a contrast in impacts. If the time series are not cointegrated, then the ENPO can reduce its negative environmental impact without affecting the positive one. If they are cointegrated, then alternative policies have to be designated for dealing with the negative impact.

Paint Waste Management in Industry

2020 ◽  
Vol 20 (1) ◽  
pp. 28-33
Author(s):  
Ainul Haezah Noruzman ◽  
Nazirah Mohd Apandi
Keyword(s):  
Sustainable Development ◽  
Environmental Impact ◽  
Waste Management ◽  
Large Volume ◽  
Surface Coating ◽  
Rapid Development ◽  
Treatment Processes ◽  
The World ◽  
Paint Industry ◽  
Negative Environmental Impact

Surface coating, paint and allied products industry is one of the major productions in the world due to the increase of urbanization and rapid development. Paint industry offers a variety of colours and types of paint to serve as needed. However, global production of paint consumption may lead to large volume of waste generated which affects people’s health and creating environmental surroundings such as landfill area, stormwater drainage and natural waterways. Therefore, this paper highlights the application of paint generally in terms of productions, treatment processes and waste management, as well as finding out the necessary steps to be taken to minimise wastes caused by productions. Furthermore, the understanding of these wastes may contribute to reduce the negative environmental impact and provide sustainable development by utilizing and promoting the paint waste as building material.

scholarly journals Phase-Change Materials in Concrete: Opportunities and Challenges for Sustainable Construction and Building Materials

Materials ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 335
Author(s):  
Raju Sharma ◽  
Jeong-Gook Jang ◽  
Jong-Wan Hu
Keyword(s):  
Phase Change ◽  
Large Scale ◽  
Building Materials ◽  
Phase Change Materials ◽  
Negative Impact ◽  
Concrete Strength ◽  
Clean Energy ◽  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Sustainable Construction

The use of phase-change materials (PCM) in concrete has revealed promising results in terms of clean energy storage. However, the negative impact of the interaction between PCM and concrete on the mechanical and durability properties limits field applications, leading to a shift of the research to incorporate PCM into concrete using different techniques to overcome these issues. The storage of clean energy via PCM significantly supports the UN SDG 7 target of affordable and clean energy. Therefore, the present study focuses on three aspects: PCM type, the effect of PCM on concrete properties, and connecting the outcome of PCM concrete composite to the United Nations sustainable development goals (UN SDGs). The compensation of reduction in strength of PCM-contained concrete is possible up to some extent with the use of nanomaterials and supplementary cementitious materials. As PCM-incorporated concrete is categorized a type of building material, the large-scale use of this material will affect the different stages associated with building lifetimes. Therefore, in the present study, the possible amendments of the different associated stages of building lifetimes after the use of PCM-incorporated concrete are discussed and mapped in consideration of the UN SDGs 7, 11, and 12. The current challenges in the widespread use of PCM are lower thermal conductivity, the trade-off between concrete strength and PCM, and absence of the link between the outcome of PCM-concrete composite and UN SDGs. The global prospects of PCM-incorporated concrete as part of the effort to attain the UN SDGs as studied here will motivate architects, designers, practicing engineers, and researchers to accelerate their efforts to promote the consideration of PCM-containing concrete ultimately to attain net zero carbon emissions from building infrastructure for a sustainable future.

scholarly journals Ways to improve environmental taxation in Russia

2021 ◽  
Vol 244 ◽  
pp. 10032
Author(s):  
Galina Semenova
Keyword(s):  
Environmental Impact ◽  
Natural Resources ◽  
Negative Impact ◽  
Environmental Taxation ◽  
State Control ◽  
Hazard Class ◽  
Tax System ◽  
Production And Consumption ◽  
The Subject ◽  
Negative Environmental Impact

Negative Environmental Impact (NEI) is one of the measures of state control over the level of environmental pollution. The established fee must be paid by all organizations, enterprises and institutions whose activities are associated with a negative impact on nature. Assessing the potential of the tax system that exists today, we have to state that the maximum possible level of the share of revenues from the exploitation of natural resources provided by the tax system as a whole (including direct and indirect taxes) cannot exceed 20%. As for direct taxes on the exploitation of natural resources, they are calculated only by a few percent. The need for reforms in the Russian tax system is obvious. The subject of the study is the types of negative environmental impact. The purpose of the study is to identify ways to improve environmental taxation. Methodology. To study the topic, the rates for emissions of pollutants into the air and into water bodies, and for the disposal of production and consumption wastes according to their hazard class were considered. Results - greening of tax policy is needed, and some of its areas that will completely change the system of waste collection and disposal in Russia are highlighted.

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.

Regulation of the permissible discharges of pollutants into water bodies established by the federal legislation and feasible directions of its improvement

2020 ◽  
Author(s):  
А.В. Григорьев ◽  
Е.Ю. Васенькина ◽  
Е.А. Кравец
Keyword(s):  
Environmental Impact ◽  
Negative Impact ◽  
Water Bodies ◽  
Environmental Legislation ◽  
Natural Background ◽  
Effluent Quality ◽  
Water Users ◽  
Negative Environmental Impact ◽  
Definition Of

Выполнен анализ законодательного обеспечения нормирования допустимых сбросов загрязняющих веществ в водоемы совместно с механизмом платы за негативное воздействие на водные объекты. Выявлена несогласованность в подходе к нормированию допустимых сбросов загрязняющих веществ и начислению платы за них для объектов I–III категорий негативного воздействия на окружающую среду. Также выявлена правовая неопределенность в порядке разработки и утверждения методик и методов нормирования допустимых сбросов и в вопросах учета природного фона, что повлекло за собой актуальные на данный момент проблемы установления нормативов допустимых сбросов для водопользователей. Описаны подходы к совершенствованию природоохранного законодательства для устранения соответствующих проблем. Необходима гармонизация требований к установлению нормативов допустимых сбросов для различных категорий объектов негативного воздействия на окружающую среду в части более четкого определения перечней загрязняющих веществ, подлежащих нормированию, а также соответствия более жестких требований более опасным категориям объектов. Для устранения экономически и технически недостижимых требований к качеству отводимых сточных вод предлагается законодательное обоснование предельных требований к качеству воды в водных объектах – приемниках сточных вод и к качеству сточных вод. The analysis of the legal support for the regulation of permissible discharges of pollutants into water bodies has been conducted together with the mechanism of payment for the negative impact on water bodies. Inconsistency was revealed in the approach to regulating permissible discharges of pollutants and charging the objects of I – III categories of the negative environmental impact. Also, legal uncertainty was identified in the development and approval of methods and techniques of accounting for the natural background in regulating permissible discharges, which entailed the current problems of establishing regulations for permissible discharges for water users. Approaches to improving the environmental legislation to address related issues are described. There is a need to harmonize the requirements for establishing standards on permissible discharges for various categories of objects of negative environmental impact in terms of a more sound definition of the lists of pollutants subject to regulation, as well as the compliance of more stringent requirements with more hazardous categories of objects. To eliminate economically and technically inaccessible requirements to the quality of effluents discharged, a legislative justification of the limiting requirements to the water quality in receiving water bodies and effluent quality is proposed.

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.

scholarly journals Green and Environment Conscious Manufacturing and Management Techniques

2018 ◽  
Vol 6 (1) ◽  
pp. 10-20
Author(s):  
Luke Askew ◽  
Anoop Desai
Keyword(s):  
Environmental Impact ◽  
Negative Impact ◽  
Green Manufacturing ◽  
Environmental Issues ◽  
Raw Material ◽  
Natural Habitats ◽  
Context Management ◽  
Modern Manufacturing ◽  
Negative Environmental Impact ◽  
Green Supply Chains

Contemporary industry is beginning to realize the negative impact that they have on the environment in terms of greenhouse gas emissions, destruction of natural habitats, hazardous waste emissions, etc. This new found consciousness has prompted a second look on part of the manufactures at how modern manufacturing practices can be modified so as to be more environmentally friendly.  Environmental impact of manufacturing can be minimized in various ways. In this context, management is often called upon to provide active leadership in managing their facilities so as to minimize their environmental impact.  Some examples of such activities include green supply chains and design for disassembly.  Such activities help to create a closed loop product lifecycle that is required to reduce the amount of raw material used and the amount of waste created by production. Similarly using design for manufacturability principles aid in the minimization of raw material used and waste generated as well.   Also, facilities are starting to move away from reactive approaches to environmental issues.  They are now using proactive approaches and value seeking approaches where the environmental issues are dealt with before they are created.  This paper presents an overview of environment conscious manufacturing practices that seek to minimize the negative environmental impact of manufacturing. Being a literature review, this paper primarily deals with state of the art in current practice pertaining to green manufacturing.

scholarly journals 3D Printing and Bioprinting Nerve Conduits for Neural Tissue Engineering

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1637
Author(s):  
Xiaoling Yu ◽  
Tian Zhang ◽  
Yuan Li
Keyword(s):  
3D Printing ◽  
Peripheral Nerve ◽  
Rapid Development ◽  
Bioactive Molecules ◽  
Neural Engineering ◽  
Future Directions ◽  
Clinical Challenge ◽  
Nerve Conduits ◽  
Manufacturing Technologies ◽  
Extrusion Printing

Fabrication of nerve conduits for perfectly repairing or replacing damaged peripheral nerve is an urgent demand worldwide, but it is also a formidable clinical challenge. In the last decade, with the rapid development of manufacture technologies, 3D printing and bioprinting have been becoming remarkable stars in the field of neural engineering. In this review, we explore that the biomaterial inks (hydrogels, thermoplastic, and thermoset polyesters and composite) and bioinks have been selected for 3D printing and bioprinting of peripheral nerve conduits. This review covers 3D manufacturing technologies, including extrusion printing, inkjet printing, stereolithography, and bioprinting with inclusion of cells, bioactive molecules, and drugs. Finally, an outlook on the future directions of 3D printing and 4D printing in customizable nerve therapies is presented.

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