scholarly journals The Development of Recycling in the Construction Industry and Its Effect on the Economy

2015 ◽  
Author(s):  
Fatih Kürşat Fırat ◽  
Fahri Akbaş
Keyword(s):  
Energy Consumption ◽  
Natural Resources ◽  
Construction Industry ◽  
Global Climate ◽  
Construction Materials ◽  
Waste Material ◽  
Raw Material ◽  
World Population ◽  
Production Operation ◽  
The Impact

The growth in world population, global climate change, consumption habits of people, and the excessive use of prime materials, causes natural resources to decline rapidly. We waste more energy during the process of production, operation and transportation of materials than ever. Perhaps one of the most important challenges that our generation faces is to create an economy that prevents waste. Considering limited resources, countries are searching for new methods of recycling and reusing waste material. Recycling is one primary way to reduce the consumption of natural resources. Waste material can go through a reproduction process with various physical and chemical transformation methods. The recycling of petrochemicals used in the automotive industry, electrical appliances, steel and cement industries, and the improvement of the transportation sector can reduce energy consumption and raw material significantly. Investment in recycling facilities can maximize profits by turning waste back into the economy. In Turkey, the improvements on the subject of recycling of materials such as plastics and paper are observed. However, we almost see no recycling in the construction industry, except iron and steel sector. Demolition materials in other countries are included in the reproduction processes through recycling. Thus both the benefits of reducing energy consumption and carbon emissions are at a minimum. Therefore, this study focuses on the recycling in the Turkey construction industry. The research also investigates the impact of recycling of construction materials to the economy and the environment based on the data and knowledge obtained from some European countries.

scholarly journals The Effects of Recyling on Economy: The Case of Usage of Scrapped Tires in Construction Industry

2016 ◽  
Author(s):  
Hümeyra Tosun ◽  
Fatih Kürşat Fırat
Keyword(s):  
Construction Industry ◽  
National Economy ◽  
Capital Expenditure ◽  
Construction Materials ◽  
Raw Material ◽  
World Population ◽  
Positive Contribution ◽  
Negative Effects ◽  
Economic Contribution ◽  
Materials Recycling

Today, rapidly industrialization and an accompanying increase of the world population cause diminishing of the limited amount of natural resources. The purpose of this study is to examine the recycling applications in the construction industry and to investigate the contribution of scrapped tires to construction industry and national economy. The construction industry is one of the fields that has the largest raw material consumption. Due to the high demand for the construction materials recycling is often employed and provide a significant economic contribution. Today, scrapped tires both exist abundantly and are currently worthless wastes. This wastes not only pollute the environment but also cause negative effects on the human healthy. Because of this reason, old tires are either reduced to certain dimension or melted in the recycling plants. The new products that therefore emerges is added in to the hot mix asphalt and then used in highway constructions, which are a significant capital expenditure for the national economy. As a result of this study, it is reveal that recycling in the construction industry has very significant positive contribution to natural environment and the existing recycling resources are not well-utilized. Moreover, the applications that have been done so far provided significant contributions to the national economy. Consequently, recycling studies should be speeded up and governmental supports should be put into practice.

Alternative Concrete – Geopolymer Concrete

2021 ◽  
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Construction Industry ◽  
Building Material ◽  
Construction Materials ◽  
Raw Material ◽  
Geopolymer Concrete ◽  
Sustainable Solutions ◽  
New Construction ◽  
Alkali Activated

Concrete is the most versatile, durable and reliable material and is the most used building material. It requires large amounts of Portland cement which has environmental problems associated with its production. Hence, an alternative concrete – geopolymer concrete is needed. The general aim of this book is to make significant contributions in understanding and deciphering the mechanisms of the realization of the alkali-activated fly ash-based geopolymer concrete and, at the same time, to present the main characteristics of the materials, components, as well as the influence that they have on the performance of the mechanical properties of the concrete. The book deals with in-depth research of the potential recovery of fly ash and using it as a raw material for the development of new construction materials, offering sustainable solutions to the construction industry.

scholarly journals The Impact of Advanced Treatment Technologies on the Energy Use in Satellite Water Reuse Plants

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 366 ◽  
Author(s):  
Jonathan R. Bailey ◽  
Sajjad Ahmad ◽  
Jacimaria R. Batista
Keyword(s):  
Energy Consumption ◽  
Water Reuse ◽  
Energy Use ◽  
Additional Treatment ◽  
Advanced Treatment ◽  
World Population ◽  
Water Reclamation ◽  
Treatment Processes ◽  
Treatment Technologies ◽  
The Impact

With an ever-increasing world population and the resulting increase in industrialization and agricultural practices, depletion of one of the world’s most important natural resources, water, is inevitable. Water reclamation and reuse is the key to protecting this natural resource. Water reclamation using smaller decentralized wastewater treatment plants, known as satellite water reuse plants (WRP), has become popular in the last decade. Reuse plants have stricter standards for effluent quality and require a smaller land footprint (i.e., real estate area). They also require additional treatment processes and advanced treatment technologies. This greatly increases the energy consumption of an already energy intensive process, accentuating even more the nexus between energy use and wastewater processing. With growing concerns over the use of nonrenewable energy sources and resulting greenhouse gas (GHG) emissions, WRPs are in need of energy evaluations. This paper contrasts the energy consumption of both conventional and advanced treatment processes in satellite WRPs. Results of this research provide a means for engineers and wastewater utilities to evaluate unit processes based on energy consumption as well as a foundation for making decisions regarding the sustainability of using advanced treatment technologies at reuse facilities.

scholarly journals An econometric analysis of the impact of the RDP on the demand for construction materials in South Africa

1999 ◽  
Vol 2 (3) ◽  
pp. 509-522
Author(s):  
Charles C. Okeahalam
Keyword(s):  
Construction Industry ◽  
South African ◽  
Econometric Model ◽  
Construction Materials ◽  
Efficient Production ◽  
Allocation Of Resources ◽  
African Government ◽  
Construction Activity ◽  
Supply Capacity ◽  
The Impact

The Reconstruction and Development Programme (RDP) is an attempt by the South African government to redress the imbalances of apartheid. It has many facets. One of these involves the provision and distribution of infrastructure to citizens who hitherto have been neglected. This calls for significant construction effort particularly for housing, water, roads and other social construction. This will require efficient production, and allocation of resources to ensure that there is adequate supply of materials to meet the likely increase in demand. This paper examines the expected demand for construction materials, assesses the supply capacity of South African suppliers of construction materials, and develops an econometric model which can be used to evaluate the impact that growth of the internal construction activity will have on construction industry suppliers.

“Cement-Free Product” for Settlement of Ceramic Tiles: An Approach for Greener Construction

2014 ◽  
Vol 805 ◽  
pp. 403-408
Author(s):  
Otávio Luiz do Nascimento ◽  
Alexandra Ancelmo Piscitelli Mansur ◽  
Herman Sander Mansur
Keyword(s):  
Carbon Dioxide ◽  
Construction Industry ◽  
Free Product ◽  
Ceramic Tile ◽  
Carbon Dioxide Emissions ◽  
Building Materials ◽  
Global Climate ◽  
Public Awareness ◽  
Ceramic Tiles ◽  
The Impact

Increased public awareness of the threats posed by global warming has led to greater concern over the impact of anthropogenic carbon emissions on the global climate associated with the level of carbon dioxide (CO2) in the atmosphere. Hence, without radical market, technological, and cultural changes, the CO2 concentrations are expected to rise to unbearable levels within just few decades ahead. The production of cement is estimated to be responsible for approximately 5% of the global carbon dioxide emissions. Consequently, aiming for creating a more sustainable world, engineers and scientists must develop and put into use greener building materials that may revolutionize the entire construction industry. This study presents an innovative product for settlement of ceramic tiles as a potential alternative for replacing the conventional cement based mortar in some specific building applications. Essentially, the novel system is based on a double face polymer-adhesive sheet (“cement-free product”). Thus, the main goal was to evaluate the performance and estimate the durability of the developed system. Pull-off tests were conducted in order to compare this new system to the traditional one, with polymer modified mortar, under different procedures and conditions of cure. In addition, both systems were modeled using Finite Element Method (FEM) to obtain the stresses at the interface between ceramic-tile and adhesive. Based on the results, the recommended limits of bond strength for the innovative “cement-free product” of ceramic tile installation could be lower than those specifications used for the equivalent mortar systems. Therefore, these results give some preliminary evidence that by using the new “cement-free” product for ceramic-tile installation may lead to some increase in the productivity and, more important, in the sustainability of a relevant sector of the construction industry.

EXPERIMENTAL STUDY ON RECYCLED CONCRETE WITH STEEL FIBERS AS A SUSTAINABLE BUILDING MATERIAL

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Olivia Mirza ◽  
Dane Wigg ◽  
Won Hee Kang ◽  
Sepani Senaratne ◽  
Vivian Tam ◽  
...  
Keyword(s):  
Natural Resources ◽  
Construction Industry ◽  
Construction Material ◽  
Experimental Studies ◽  
Recycled Concrete ◽  
Steel Fibers ◽  
Future Research ◽  
Sustainable Solutions ◽  
Structural Reinforcement ◽  
The Impact

The global demand for construction aggregate exceeds 26 billion tons per year. With global policy attention directed towards climate change, environmental and economic sustainability, changes are required to the Australian construction industry regarding the extraction of natural resources. In particular, the concrete industry requires seeking innovative, sustainable solutions for reducing the impact of construction and maintenance on the environment. The majority of structures in Australia use reinforced concrete. Therefore, using environmentally and economically sustainable materials such as recycled concrete in construction would preserve natural resources and reduce construction waste and overall costs. There is considerable research available on the use of recycled concrete as a construction material and the use of steel fibers as structural reinforcement has been studied since the 1960’s. However, there is very little research on the combination of the two as a construction material for concrete structures. This study focused on secondary beams made of recycled concrete with the incorporation of steel fibers. This combination offers a structurally sound material that will provide a durable and sustainable solution to Australian Construction Industry. Experimental studies were conducted to validate the performance of the new material in a structural application. Based on the results of the study, recommendations for future research and design applications using these materials are made.

scholarly journals STUDY INFLUENCE THE DESIGN ОXYGEN LANCE HEAD ON THE RESULTS OF CONVERTER MELTING WITH SCRAP PREHEATING

2021 ◽  
Vol 1 (38) ◽  
pp. 33-39
Author(s):  
Е. Sigarev ◽  
Y. Lobanov ◽  
А. Pohvalitiy
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Heat Content ◽  
Scrap Metal ◽  
Raw Material ◽  
Preliminary Heating ◽  
Metallurgical Enterprise ◽  
Metal Charge ◽  
Metallic Inclusions ◽  
The Impact

The results of calculation of energy efficiency of the variant of technology of converter smelting with preliminary heating of scrap metal in the unit due to burning of solid fuels in modern raw material conditions of the metallurgical enterprise of Ukraine are presented. A critical analysis of the variant of converter smelting technology with the use of preheating of an increased amount of scrap metal in the charge containing briquettes of steel chips in the unit, before pouring processing iron. According to the results of the calculation of the efficiency of use of different types of fuel used for preheating of scrap metal in the unit, the rational type and technology of its use in converter smelting are determined. A direct connection between the chemical composition of briquettes, the level of their preheating and the share in the metal charge on the energy efficiency of the converter process and their chemical heat content has been established. The nature of the temperature distribution in the volume of briquettes from steel shavings, which are a part of the metal charge, is taken into account when they are preheated by oxidation of coal with oxygen supplied through the nozzles of the standard lance. A method for calculating the change in energy consumption of scrap metal during its preheating, taking into account the content of elements in the briquettes and the level of heating. The energy consumption of the converter process with preheating of the metal charge increases in proportion to the level of contamination of briquettes from steel chips with non-metallic inclusions. According to the calculations when heating briquettes by 100—800 degrees in the converter, the increase in energy consumption of the converter process is from 60 to 630 MJ / t and from 445 to 1000 MJ/t for contamination of briquettes with non-metallic inclusions of 2.47 and 7.87 % by weight in accordance. With the reduction of briquette contamination, the efficiency of preheating of the metal charge increases. The share of the impact of the level of briquette contamination on the overall energy efficiency of the converter process is on average 0.3 % of the total energy savings of 1.91—1.92 GJ / t, which is achieved by increasing the share of scrap metal in the charge.

scholarly journals INTERNATIONAL TRENDS AND CURRENT CHALLENGES OF CONSTRUCTION MATERIALS MARKET DEVELOPMENT

2020 ◽  
Author(s):  
Yulia Orlovska ◽  
◽  
Daria Havrylenko ◽  
Keyword(s):  
Real Estate ◽  
Construction Industry ◽  
Information And Communication Technologies ◽  
Building Materials ◽  
Construction Materials ◽  
Construction Sector ◽  
International Trends ◽  
The World ◽  
The Impact ◽  
Construction Services

The main international trends in the world market of construction materials and services have been analyzed. The dynamics of world GDP and exports of construction services for the period 2000-2019 has been studied and a conclusion is made on the impact of economic crises on their growth rates. It has been determined that the dynamics of world exports of construction services is characterized by high instability with peaks of growth and decline, and is more sensitive than GDP growth. It has been noted that overcoming the crisis in the export sector of construction services takes more time and occurs with an approximate two-year time lag compared to GDP dynamics. The share of the construction industry in the world GDP by the degree of development has been analyzed. The reasons for the decline in the share of the construction industry in countries with economies in transition have been substantiated. It has been noted that in the developed countries the share of the construction sector is accounted for by real estate management activities related to maintenance, rent, purchase and sale and other transactions with land and real estate. The forecast values of growth of the market of building materials and services till 2030 have been given. The essence of the term «wide construction» has been revealed and the structure of this sector in different countries of the world is shown. The main exporters in the world construction market have been given and the structural distribution of the largest construction companies in the world ranking by country of origin has been analyzed. The dynamics of income level in the construction industry market for the period 2011-2018 has been studied. It has been noted that an important area of the construction sector is the market of roofing and facade materials and the world's largest companies for the production of this type of construction materials have been revealed. Conclusions on the essence of global transformations of the market of building materials and services have been made, and also it has been defined that they are caused by transnationalization of corporate structure of the market, influence of scientific and technical progress and information and communication technologies on world centers as well as the emergence of the concept of «sustainable construction» in the course of humanity for sustainable development.

scholarly journals Choice of Criteria for Ecological Assessment of Construction Technologies

10.12737/2159 ◽  
2013 ◽  
Vol 2 (6) ◽  
pp. 29-32
Author(s):  
Кобелева ◽  
S. Kobeleva
Keyword(s):  
Energy Consumption ◽  
Natural Resources ◽  
Total Energy ◽  
Construction Industry ◽  
Environmental Issues ◽  
Ecological Assessment ◽  
Environment Pollution ◽  
Total Energy Consumption ◽  
Energy Complex

The fuel-energy complex and the construction industry are ones of the main sources of environment pollution. The main man-made emissions have been analyzed, and calculations of buildings’ energy consumption have been presented in this paper. To assess the contribution of construction technologies in environmental issues it has been proposed the following criteria: total energy consumption; emissions of polluting substances in the biosphere; natural resources consumption.

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