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... 3D printing construction techniques are believed to have potential sustainability benefits, including improved resource efficiency, increased construction productivity, and construction of complex geometries without supporting structures. 3D printable concrete materials, when introducing industrial wastes such as fly ash, silica fume, and slag, may also bring additional sustainability benefits. Th ...
... With the scarcity of land and rapid drive towards sustainable development, numerous research studies are conducted on diverting waste from landfills. However, majority of these studies are focused on either experimental investigation of material characteristics or environmental impacts. Due to heavy virgin material usage, building material manufacturing industries are increasingly interested in us ...
cement; compression strength; concrete; feasibility studies; industrialization; industry; leachates; municipal solid waste; pollution; population growth; porosity; toxicity; ultrasonics
Abstract:
... Increased water demand due to population growth and industrialization has led to increased water consumption. Hence, it is required to find an alternative to water in different industries. Concrete represents a remarkable water-consuming industry. The present study investigates whether the treated leachate of municipal landfills can be employed as a substitute for water in the concrete mixing sche ...
carbon; carbon footprint; case studies; concrete; industry; models; transportation
Abstract:
... There are numerous strategies that can be used to reduce the embodied carbon footprint of real property investments, many of which can be accomplished for no additional cost and with minimal performance impacts. This study aims to propose the incorporation of the life cycle carbon quantification into the government procurement of real property process in order to reach out to low-carbon durable an ...
... This study aims to examine the mechanical, environmental, and economic properties of recycled aggregate concretes produced using emerged recycled concrete aggregates from the buildings that were demolished in a controlled way after the 24 January 2020, Elazig-Sivrice earthquake. For this purpose, 24 series of recycled aggregate concretes were produced, water-to-cement ratios of 0.30–0.35–0.40–0.45 ...
carbon; carbon dioxide; cement; compression strength; concrete; energy conservation; microstructure; models; polymers; reaction kinetics; slags; water content
Abstract:
... Ultra high performance concrete (UHPC) is a cement-based material with great development prospects. However, the production of cement will produce a large amount of CO₂, which does not conform to the current global trend of energy conservation and emission reduction, and limits the further development of UHPC. One of the ways to further develop UHPC is to reduce the carbon emissions in the product ...
... Urease is a dinickel enzyme commonly found in numerous organisms that catalyses the hydrolysis of urea into ammonia and carbon dioxide. The microbially induced carbonate precipitation (MICP) process mediated by urease-producing bacteria (UPB) can be used for many applications including, environmental bioremediation, soil improvement, healing of cracks in concrete, and sealing of rock joints. Despi ...
... The environmental conditions of sustainable improvement in manufacturing consist of the application of secondary raw materials in the design and structure of new structures. Presently, the demand to construct new structures is growing rapidly, especially in the developed world. All of the construction and demolition (C&D) waste is deposited in open landfills in easily reachable spaces, which leads ...
... This paper provides a comprehensive review on the research of coir fibre and coir fibre reinforced cementitious composite (CFRC) in the past 20 years. In the first part, the extraction process, morphology, density, chemical composition, and tensile performance of coir fibres are discussed. Then, the pull-out performance, physical properties (i.e., density, thermal and acoustic insulation), short- ...
... This paper reviews the potential use of silico-manganese slag (SiMnS) as binder and aggregate in Portland cement and geopolymer concrete. SiMnS is a byproduct of alloy steel production. Depending on the process of solidification, the slag is available in crystalline hard stone type and granulated glassy form. The latter one is more reactive due to the presence of amorphous phases. Therefore, granu ...
... In order to mitigate the problems associated with the deposition of biomass ashes, it becomes essential to use these materials efficiently. One solution to the problem is utilization of these wastes in the concrete industry. Due to the massive development of infrastructure, the demand for cement is tremendously rising which results in the surge of cement concrete by 30 billion tonnes every year. P ...
... Improper disposal and accumulation of solid waste can cause a number of environmental problems, such as the heavy metal contamination of soil. Microbially induced calcium carbonate precipitation (MICP) is considered as a promising technology to solve many environmental problems. Calcium-based solid waste can be utilized as an alternative source of calcium for the MICP process, and carbonate-based ...
... Recycling of waste and disposal has become a vital environmental issue that creates serious concern worldwide. The use of waste material in pavement structure is one of the essential initiative for the future towards sustainable environment. This study imparts a review on waste materials such as plastic waste, crumb rubber, glass fibre, steel slag, crushed concrete and Low Density Polyethylene (LD ...
brittleness; cement; clay; concrete; modulus of rupture; rubber
Abstract:
... An experimental study was conducted to investigate the mechanical performance of rubberised concrete containing Burnt Clay Powder (BCP). Waste Tire Rubber (WTR) and BCP were used to replace coarse aggregate and Ordinary Portland Cement (OPC) respectively. Class 20, 25 and 30 concrete mixes based on British Research Environment (BRE) were cast and tested for compressive, split tensile and flexural ...
... Ignimbrites are extensively used in historical places, houses, hospitals, mosques, graveyard stones etc. worldwide especially in Ahlat-Bitlis, Turkey. These stones have prominent features such as good-insulation, durability and lightness. Another natural material that is widely preferred in the construction sector due to its advantages is pumice. In this paper, ignimbrites in black, light yellow, ...
... Durability performance of concrete is enhanced by adding supplementary cementitious materials such as fly ash. The concrete made with addition of fly ash with Portland cement is called fly ash cement concrete (FACC). Generally, modelling approach is applied to predict the service time of concrete in aggressive environment. Most degradation of concrete is found in marine environment, due to the exp ...
concrete; environmental protection; equations; hardness; prediction; rubber; temperature
Abstract:
... Rubber has superior performance and is widely used, but it is easy to age under the influence of the environment, which leads to the decline of its performance. Rubberized concrete is a new type of building material, which attracts attention because of its environmental protection and good dynamic performance. Based on the environment of rubber in rubberized concrete, the accelerated aging test of ...
... The objective of this study was to synthesize a sustainable concrete material from readily available waste and by-products; Ground Granulated blast furnace slag (GGBFS) and waste foundry sand (WFS). GGBFS was alkali-activated using NaOH solution and used as a binder to completely replace Ordinary Portland cement (OPC). Concurrently, WFS was used as fine aggregate to replace natural sand in concret ...
concrete; construction industry; polyethylene terephthalates; porosity; rubber; steel; sustainable development
Abstract:
... Numerous studies investigated the possibility of incorporating plastic wastes in concrete mixtures, thus contributing to efficient management and sustainable development of the construction industry. This paper investigates the possibility of reducing the water-to-cement ratio and/or incorporating steel fibers or polymeric latexes to mitigate the drop in structural properties of reinforced concret ...
carbonation; case studies; concrete; design for environment; emergy; freeze-thaw cycles; frost resistance; life cycle costing; theoretical models
Abstract:
... The existing researches on the recycled aggregate concrete (RAC) mainly focus on the recycling of waste concrete used in atmospheric environment, while the ones on the recycling of waste concrete subjected to complex environments are seldom reported. Reusing waste concrete in freeze-thaw (F-T) environment relates to the multi-generation recycling system of “high performance parent concrete-waste c ...
... The potential use of carbonaceous sugarcane bagasse as carrier media of Bacillus subtilis in amending microstructure and corrosion inhibition of reinforced concrete is explored in this study. The chlorides migration inside the concrete, electrochemical performance of embedded steel along with healing and densification in microstructure were assessed. There was a 53.78% reduction in the depth of mi ...
circular economy; concrete; construction industry; governance; green chemistry; issues and policy; people; sand; subsoil; waste management; wastes; China
Abstract:
... Abandoned materials and substances generated during construction, renovation, and demolition activities are collectively referred to as construction and demolition (C&D) waste. Inert C&D waste materials, such as sub-soil, sand, stone, and concrete, could be either directly reused on another construction site or recycled. Therefore, real-time information about site locations, dates, categories, pri ...
adverse effects; angle of incidence; concrete; energy conservation; heat; insulating materials; models; solar radiation; summer; thermal analysis; transmittance; winter
Abstract:
... Translucent concrete (TC) is promising to transmit daylight into buildings with high thermal performance and energy-saving potential. However, most of the existing studies on TC omit its dynamic transmittance. More research is required to analyze the impact of dynamic transmittance on the optical and thermal performance of TC walls, and to investigate how to take advantage of this distinctive feat ...
European Union; circular economy; concrete; environment; management systems; waste management; wastes; Europe
Abstract:
... The construction sector is the biggest driver of resource consumption and waste generation in Europe. The European Union (EU) is making efforts to move from its traditional linear resource and waste management system in the construction sector to a level of high circularity. Based on the theory of circular economy, a new paradigm called waste hierarchy was introduced in the EU Waste Framework Dire ...
COVID-19 infection; Orthocoronavirinae; case studies; cement; compression strength; concrete; environment; environmental impact; modulus of elasticity; pandemic; rubber; ultrasonics; wastes; Australia
Abstract:
... The use of single-use nitrile gloves has been on a sharp incline since the Coronavirus pandemic first started in late 2019. This led to a significant increase in the generation of this clinical waste that requires various recycling solutions to reduce its environmental impact from disposal or incineration. This paper explores its application in structural concrete by adding shredded nitrile gloves ...
... One of the feasible solutions for the solid waste management problem is to use recycled plastic waste as a replacement for natural aggregates in construction applications, which reduces pollution and protects natural resources from depletion. Corrosion of steel reinforcement due to carbonation is one of the important factors affecting the durability of reinforced concrete, which leads to a decreas ...
... Natural resources depletion is gradually becoming a critical burden on the environmental and ecological balance, pushing the development of artificial aggregates forward. In order to curb the shortage issues of natural aggregates and minimize the destruction of land topography, alkali-activated aggregates (AAA) have gradually become a hot topic in recent years as a new application of alkali-activa ...
compliance; concrete; data collection; energy policy; nuclear power; politics; regression analysis; technology transfer; trade; uncertainty
Abstract:
... By analyzing bilateral cooperation involving civilian nuclear technology from 2000 to 2015, this study finds potential proliferation uncertainty in recent technological nuclear cooperation. We use the dataset that divides technological nuclear cooperation into two categories - concrete and supportive, where concrete cooperation involves the more in-depth transfer of technology related to nuclear p ...
... This paper presents an experimental study on the effects of using agricultural waste coconut shells for producing synthesized biomass recycled aggregate (SBRA) and replacing natural aggregate (NA) with its equivalent amount on the durability, thermal conductivity, carbon dioxide emissions, and economics of concrete. Test results show that the 3-day and 28-day compressive strength of concrete with ...
... Bamboo continues to be of interest in buildings and structures owing to its good mechanical properties and sustainability. In this study, a new method of bamboo use is proposed, which is to twine laminated bamboo lumber (LBL) slices to form a bamboo-fiber-reinforced composite tube (bamboo slices twining tube, BST). Considering the high tensile strength of bamboo fiber, BST is proposed to replace s ...
... Transportation systems have enormous challenges in terms of sustainability since they deal with issues like economic, environmental, and social factors, and pavement sustainability is unavoidably one of these problems. This study investigates pavements' sustainability potential, and in doing so, it looks at both global practices and personal experiences. This research investigates the long-term vi ...
... Using fibre-reinforced polymers (FRP) in construction avoids corrosion issues associated with the use of traditional steel reinforcement, while seawater and sea sand concrete (SWSSC) reduces environmental issues and resource shortages caused by the production of traditional concrete. The paper gives an overview of the current research on the bond performance between FRP tube and concrete with part ...
... The use of post-consumer plastics in concrete production is an ideal alternative to dispose of such wastes while reducing the environmental impacts in terms of pollution and consumption of natural resources and energy. This paper investigates different approaches (i.e., reducing water-to-cement ratio and incorporating steel fibers or polymeric latexes) that compensate for the detrimental effect of ...
Rebecca J. Shellock; Christopher Cvitanovic; Mary Mackay; Merryn C. McKinnon; Jessica Blythe; Rachel Kelly; Ingrid E. van Putten; Paris Tuohy; Megan Bailey; Alpina Begossi; Beatrice Crona; Kafayat A. Fakoya; Beatrice P. Ferreira; Alice J.G. Ferrer; Katia Frangoudes; Judith Gobin; Hong Ching Goh; Paivi Haapasaari; Britta Denise Hardesty; Vreni Häussermann; Kelly Hoareau; Anna-Katharina Hornidge; Moenieba Isaacs; Marloes Kraan; Yinji Li; Min Liu; Priscila F.M. Lopes; Marina Mlakar; Tiffany H. Morrison; Hazel A. Oxenford; Gretta T. Pecl; Jerneja Penca; Carol Robinson; Samiya Selim; Mette Skern-Mauritzen; Kumi Soejima; Doris Soto; Ana K. Spalding; Alice Vadrot; Natașa Vaidianu; Mona Webber; Mary S. Wisz
... Interdisciplinary research is paramount to addressing ocean sustainability challenges in the 21st century. However, women leaders have been underrepresented in interdisciplinary marine research, and there is little guidance on how to achieve the conditions that will lead to an increased proportion of women scientists in positions of leadership. Here, we conduct in-depth qualitative research to exp ...
... Application of biochar, produced from locally generated wastes, as admixture in cement is a strategy to upcycle biomass waste and produce durable building materials. This research explores the influence of particle size and porosity of biochar, prepared from coconut shell and wood waste, added at 2 wt% of cement, on rheology, setting time, hydration and early age strength of cement mortar. For eac ...
... Construction and demolition waste are one of the largest waste streams generated in the EU by volume. They consist of materials such as concrete, bricks, gypsum, wood, glass, metals, foams, plastics, solvents, asbestos, asphalt, and excavated soil. Nowadays, many of them can be recycled, some even endlessly. This research attempts to contribute to the non-destructive characterization of such a was ...
ammonium nitrogen; biodiversity; chemical oxygen demand; concrete; hybrids; land use; phosphorus; plant growth; pollution control; rivers; temperature; total nitrogen; total phosphorus; water quality; watersheds; China; Yellow River
Abstract:
... Low-polluted waters treated by traditional constructed wetlands were usually difficult especially because of restricted available land use. A hybrid constructed wetlands (CWs) could be applied to remediate low-polluted rivers, which can realize steps complementary to each other that exploit the specific advantages of the individual systems and achieve higher treatment effects. The hybrid CWs cover ...
bitumen; concrete; energy balance; geometry; grasses; heat; iron; lakes; reflectance; river water; soil; spectrometers; tin; topography; urban areas; vegetation; India
Abstract:
... Assessment of energy fluxes and surface-atmosphere energy balance is considered an important study for an urban environment. The arrangement of manmade impervious surfaces (building and roads), their geometry and orientation, material composition, albedo/emissivity, topography, natural and delineated spaces of vegetation, and the concurrent atmospheric profiles together play a pivotal role in defi ...
... As a necessary element of asphalt concrete, bitumen plays a decisive role in influencing the durability and lifespan of asphalt pavement. Environmental chemicals, such as de-icing salt and acid rain, have negative effects on asphalt pavement. However, different bitumen might react differently to environmental chemicals. The purpose of this research is to investigate the influence of environmental ...
Rosa damascena; altitude; byproducts; chemical analysis; chemical composition; citronellol; cold; concrete; essential oils; genotype; geraniol; oils; phenylethyl alcohol; Iran
Abstract:
... Rosa damascena Mill., the unique species of Rosaceae, is one of the valuable medicinal and ornamental aromatic plants cultivated in different parts of Iran. Climatic conditions impact the productivity and yield of rose products. This work was designed to study the chemical composition of the essential oil, concrete, and absolute oil of Rosa damascena Mill. (same genotype) collected from three diff ...
air pollution; air quality; aluminum; bricks; cadmium; calcium; cement; chemical composition; chromium; coal; concrete; copper; environment; iron; lead; manganese; manufacturing; molecular weight; natural gas; nickel; particulates; vanadium; zinc; China
Abstract:
... Industrial emission has been proved to be an important source of atmospheric PM₂.₅, which causes serious air pollution and health impacts. The air quality of the industrial zones, which are the intermediate stationary areas between the direct emissions and diffusion to the atmosphere, is always overlooked. In this study, the PM₂.₅ filter samples were collected in the six representative types of in ...
... PURPOSE: The production of Technosols is a sustainable strategy to reuse urban wastes and to regenerate degraded sites. However, little is known regarding the role of the activity of enzymes associated with carbon and nutrients cycling on organic degradation and microbial activity in these soils. METHODS: A controlled experiment was conducted with Technosols made from construction wastes, wood chi ...
Carex; Phalaris arundinacea; biomass; concrete; groundwater; hydroponics; indigenous species; longevity; phytodesalination; salt tolerance; sodium chloride; stormwater; stormwater management; toxicity; transpiration; water uptake; wetland plants; wetlands; winter; Sweden
Abstract:
... Deicing with sodium chloride maintains safe roads in the winter, but results in stormwater runoff with high chloride (Cl⁻) content that causes various downstream problems. Chloride-rich water risks contaminating groundwater, shortening the lifespan of concrete and metal constructions, and being toxic to aquatic organisms. Current stormwater treatment methods are unable to remove Cl⁻, but wetland p ...
alkalinity; carbonation; cement; compression strength; concrete; lead nitrate; pollution; research programs; seawater; slurries; steel; sulfates; Egypt
Abstract:
... In Egypt, the national strategic plan for population redistribution supports the establishment of new towns and urban settlements across the coastal zones to relieve the pressure on the packed Nile Valley and Delta and encourages internal migration to new urban coastal communities. Since reinforced concrete has a poor service record in these areas, this situation urged us to design a research prog ...
... Concrete is the world's most widely-used anthropogenic material, and Circular Economy strategies will be key to addressing the myriad challenges that face its use today and into the future. Despite a rapid growth of research interest in developing Circular Economy strategies for concrete, this has mostly focussed on technical and environmental issues at the material and product scale. Holistic app ...
... Pervious concrete (PC) has gained important ground in civil construction in recent years due to its advantages in managing surface runoff. Numerous studies have been developed to characterize the material mechanically and hydraulically and verify compliance with standards. However, there are still some gaps in the knowledge about the hydraulic behavior of PC over time and how its properties vary w ...
... Studies have been conducted on the repeated recycling of recycled coarse aggregates and recycled fine aggregates obtained from concrete waste, but no research has been conducted on the repeated recycling of recycled powder as a partial replacement for cement, which is pointed out as a major source of CO₂ in the concrete industry. This paper investigates the closed-loop recycling potential of const ...
air; carbon; cement; coal; concrete; construction industry; construction materials; durability; hydraulic conductivity; particle size; porosity; shear strength; wastes
Abstract:
... Historically coal mining wastes have been viewed as heterogenous and hazard-prone geomaterials. Given that failures of colliery tips and tailing dams are reported on a regular basis, reclamation of coal mining wastes from storage facilities is increasingly being considered. There is a resistance to the use of coal mining waste in construction industry despite scattered but growing reports of succe ...
... This experimental research was conducted to study the combined effect of agricultural by-product wastes on the properties of concrete. The coconut shell ash (CSA) was utilized to substitute cement content ranging from 0 to 20% by weight of total binder and sugarcane bagasse ash (SCBA) to substitute fine aggregates (FA) ranging from 0 to 40% by weight of total FA. In this regard, a total of 300 con ...
... The huge amounts of natural resources and high level of energy consumption in concrete production necessitate the use of agricultural and demolition wastes as alternative construction materials. The present study explores pervious concrete (PC) that includes sorghum husk ash (SHA) and recycled concrete aggregate (RCA) as alternatives to cement and natural aggregate (NA) in standard PC mixtures. PC ...