The Global NEST Journal is an open access journal that publishes original research articles, short papers and critical reviews on all aspects of Environmental Science and Technology. These comprise, but are not limited to, Pollution Control Technology, Global Environmental Change, Air Quality, Water Quality, Water and Waste Water Treatment, Solid Waste Management, Hazardous Substances and Risk...Read full aims and scope
Effect of additives on the compressive strenght of slag-based inorganic polymers
General
The present paper aims to assess the effect of various additives on the compressive strength of inorganic polymers (geopolymers) synthesised using low Ca electric arc ferronickel slag and alkali activating solutions. The main operating parameters include pre-curing (48 hours), temperature (40 to 80...
High Strength Geopolymers Produced from Coal Combustion Fly Ash
General
High strength geopolymers were produced from coal combustion fly ashes. These matrices reached compressive strength values over 100 MPa, much stronger and denser than obtained by using Portland Cement binders. Size fractions were obtained by size separation techniques and the relationship between...
Optimizing lightweight concrete with coconut shell aggregates for high strength and sustainability
Solid Waste Management
In this investigation, coconut shell, a lightweight agricultural waste, is used to completely replace coarse material. Based on previous findings, it is suggested that coconut shell be used as coarse aggregate in structural lightweight concrete. Therefore, the purpose of the study was to develop...
Utilization of nanomaterials and ceramic waste for sustainable environmental protection
Solid Waste Management
The amount and type of waste are increasing due to population growth. Many harmful materials have been in the atmosphere for a very long times. This causes a crisis in the waste disposal and thereby contributes to environmental issues. Recycling concrete manufacturing waste materials not only offers...
Strength studies on concrete using e-plastic waste as coarse aggregate
Solid Waste Management
As an important resource for the IT sector and due to the extremely hazardous elements it contains and the low recycling rate, e-plastic waste management and recycling are growing swiftly. E-plastic waste utilization reduces aggregate costs, landfill costs and energy prices. Rapid population growth...
Influence of Chemical and Thermal Treatment Methods on the Mechanical and Micro-Structural Characteristics of Coconut Shell based Concrete
General
In this study, an attempt is made to understand the effectiveness on initial treatment of coconut shell on the strength of concrete. The coconut shell materials obtained from the agricultural wastes are used as a replacement for coarse aggregate in conventional concrete. From the particle size...
Enhancing the Interface of Cement-paste Composite by Dispersing Sustainable Nano-Carbon Pyrolytic Char with Silica fume: A Sustainable and Effective approach
General
Discrete studies are performed on the reuse of end-of-life tires in the construction industry as their accumulation is a global concern to the environment. In consequence, the desired focus of this work is to understand the interaction of powder derived from recycling process of tire waste which yet...
Rheology of binary cement paste system blended with silica fume and alccofine
Circular economy
The flow properties of the binary cement paste system added with supplementary cementitious materials, effect of polycarboxylate based superplasticizer dosage and their influence on the yield stress and the plastic viscosity were studied. The cementitious materials under the study are silica fume...
Pine cone ash stabilization of expansive soils
Solid Waste Management
The use of appropriate waste materials to stabilize problematic soils, such as expansive soils that are responsible for geotechnical damage, is a common practice in geotechnical engineering. This study presents the use of pulverized ash from the combustion of pine cone (PC) waste as a stabilizing...
Influence of Utilizing Prosopis Juliflora Ash as Cement on Mechanical Properties of Cement Mortar and Concrete
Ecology, environmental change and management
The infrastructure of the country heavily depends on the construction material concrete. The primary ingredient in conventional concrete is cement, fly ash, or another cementitious substance. The need to explore alternative sources is driven by the challenges posed by global environmental warming...
Feasibility study of cement composites with para wood particle wastes: strength and durability
General
The purpose of this study was to investigate the potential use of Para wood particle wastes and cement for producing the cement composite as a new environmental friendly construction material. Strength and durability of cement composites mixed with different mix proportions of Para wood particles...
Utilizing rice husk ash as a bio-waste material in geopolymer composites with aluminium oxide
Biowaste
Permanent damages and spalling occur in conventional concrete due to high temperatures. Also concrete loses its compressive strength amounting to about 50 to 75% of the original strength as reported in most of the research works. As opting for high grade of concrete leads to higher costs and emits...
Experimental Investigation of Effect of Waste PET fibres on the Impact Behaviour of PET Fibre Reinforced Concrete
Solid Waste Management
Concrete, being the construction material that is extensively employed, possesses various limitations despite its adaptability in building projects. It exhibits weakness when subjected to tension, has restricted ductility, and offers minimal resistance against cracking. Concrete is widely used in...
A Study on Cement-free Geopolymer Concrete incorporated with industrial waste Cured at Open Environment for different molarities of sodium hydroxide
Air Quality
Nowadays, the increase in population and industrial growth that generates lot of waste products which creates disposal problems and severe environmental hazards. The cement industry is one of the important sectors which liberates greenhouse gas such as carbon dioxide. The consumption of waste...
Transforming waste into sustainable building materials: Properties and environmental impacts of Geopolymer concrete with recycled concrete aggregates
Solid Waste Management
Industrial by-products such as cementitious materials or aggregates have the potential to mitigate the adverse environmental effects associated with traditional cement manufacture. Geopolymer Concrete (GPC) is more eco-friendly than conventional concrete because it does not require cement. GPC with...
Experimental study on effective utilization of industrial solid wastes in developing Ultra-High Performance Geopolymer Concrete
Circular economy
This experimental study explores the use of Ground Granulated Blast Furnace Slag(GGBS) and dolomite as alkali activated binders and copper slag as aggregate to achieve a cost-effective and sustainable Ultra-High-Performance Geopolymer Concrete(UHPGC). Several concrete compositions utilizing copper...
Physical and mechanical properties of lightweight concrete with the incorporation of waste disposal polyurethane foam as coarse aggregate
Solid Waste Management
Industrial waste in engineered concrete mixes is an enormous step towards sustainable development. Polyurethane foam waste (PUFW) is mainly generated by the refrigeration, automobile, and construction industries. Day by day, large amounts of PUFW are incinerated and disposed of in landfills, which...
Strength and Durability Studies on Concrete using Cashew Nut Shell Ash (CNSA) waste as Supplementary Materials
Solid Waste Management
As the world population is expected to increase significantly, there is a greater need for housing and, as a result, building materials. Conventional manufacturing methods for materials such as concrete involve substantial energy usage and substantial release of carbon emissions, which contribute to...
Utilization of metallurgical solid by-products for the development of inorganic polymeric construction materials
General
This paper deals with the geopolymerization of the red mud generated in the primary aluminium production and the slag generated in the ferronickel production, in order to develop inorganic polymeric materials with advanced mechanical and physical properties. In particular, the effect of the main...
Enhancing Solid Waste Sustainability with Iroko Wooden Sawdust and African Oil Bean Shell Particle-Strengthened Epoxy Composites
Solid Waste Management
Bio-composite materials are gaining traction in various industries as sustainable alternatives to synthetic fiber-reinforced composites. This study investigated the impact of fine powders loading on the tensile, transverse, and compressive characteristics of hybrid composites composed of Iroko...
Valorization of plastic waste aggregate in concrete: A study on durability and microstructural properties.
Solid Waste Management
Efficient valorization of plastic waste is widely investigated by numerous researchers. The need for an alternate to conventional aggregate in concrete production has led to the evolution of numerous artificial aggregates. This research investigates the impact of adverse environmental exposure...
Environment friendly sustainable concrete produced from marble waste powder
Environmental Management and Policies
Concrete is an indispensable construction material renowned for its versatility and durability, yet its traditional components pose significant environmental challenges. The cement industry is a major emitter of CO2, while the extensive extraction of natural aggregates depletes finite resources. In...
Experimental investigation on light weight cellular concrete using recycled glass and plastic waste
Solid Waste Management
Cellular Lightweight Concrete (CLC) also known as Foamed concrete is one of the most significant type of concrete used for construction purposes due to its various advantages and usages over traditionally produced concrete. The rapid urbanization has led to the enormous increase in wastes being...
Comparative study on physical and mechanical properties of high slump and zero lump high volume fly ash concrete (HVFAC)
General
An experimental investigation was carried out to compare the compressive strength of zero slump and high slump concrete with high volume fly ash. 40% to 70% replacements of OPC (by weight) with class F fly ash have been incorporated. Superplasticizer was added at 1% of binder (cement + fly ash) to...
Concrete Constructed with Recycled Water to Experimental Analysis of the Physical Behavior of Polypropylene Aggregate (PPA)
Water treatment
In concrete industry, the use of concrete solid wastes is becoming further common since it can minimize associated costs and environmental implications. The current research looks at how concrete performs when polypropylene (PP) plastic, produced from pollution garbage items, is used as a partially...
Thematic areas
Circular economy
Climate change and air pollution
Solid waste management
Water and wastewater
Climatic Influence on Solar Saltpans with specific reference to Thoothukudi District
Climate change mitigation...
24-07-2024
Analysis of the performance, combustion and emission of Hydrogen Induction in a CRDI engine
Climate change mitigation...
24-07-2024
Do Technological Innovation and Environmental Regulation Reduce Carbon Dioxide Emissions? Evidence from China
Ecology, environmental change...
24-07-2024
Strength and Durability Studies on Concrete using Cashew Nut Shell Ash (CNSA) waste as Supplementary Materials
Solid Waste Management
17-07-2024
Research on Regional Carbon Emission Policy and Breakthrough Green Technology Innovation Pathways: Based on the Perspective of New Quality Productivity
Ecology, environmental change...
17-07-2024
Phytogenic aqueous extract mediated fabrication of Ag-Fe2O3 nanohybrids for detoxification of carcinogenic Congo Red dye: An Environmental Remediation approach
Water treatment
17-07-2024
Anthropogenic Influence and Climate Change on Water and Nutrient Dynamics in the Kebir-Rhumel Basin, (Northeastern Algeria)
Water Quality
15-07-2024
Green Synthesis of Silver based Nanocomposites using Indigenous Plant Waste and their Lab Scale Application for Targeted Environmental Remediation
Biowaste
15-07-2024
A Review of Life Cycle Assessment of Nanomaterials-Based Adsorbent for Environmental Remediation
Life cycle analysis...
15-07-2024
Numerical and experimental analyses for performance and emissions assessment of a four-stroke engine powered by oleic acid methyl ester biofuel made from waste frying oil
Sustainable Energy
22-08-2024
Enhancing seafood processing wastewater treament efficiency of an anaerobic membrane bioreactor (AnMBR) system: a comparision of post-treatment methods
Water and Wastewater...
22-08-2024
Experimental study on effective utilization of industrial solid wastes in developing Ultra-High Performance Geopolymer Concrete
Circular economy
17-08-2024
Strength Properties Evaluation of Composite Blocks Incorporated With Acacia Nilotica Ash
Solid Waste Management
17-08-2024
AN OVERVIEW OF GREEN ENERGY SOURCES, ENHANCING THE ENVIRONMENTAL AND ECONOMIC ELEMENTS OF THE WORLD'S SUSTAINABILITY
Sustainable Energy
17-08-2024
Analysis of the effect of digital financial inclusion on agricultural carbon emissions in China
Ecology, environmental change...
17-08-2024
Development of an Air Quality Forecasting System Using a Multimodal Deep Learning Framework Based on Satellite Images of Delhi City
Air Quality
17-08-2024
An Experimental Assessment of the Performance of Solar Panels Using Efficiency Enhancement Techniques in India's Tropical Region
Sustainable Energy
10-08-2024
The Bioremoval of Toxic Dyes Using Chlorella Algae in Airlift Bioreactor
Water treatment
10-08-2024