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View article: Workability and mechanical properties of alkali-activated fly ash-slag concrete cured at ambient temperature
Workability and mechanical properties of alkali-activated fly ash-slag concrete cured at ambient temperature Open
Alkali-activated fly ash-slag (AAFS) concrete is a new blended alkali-activated concrete that has been increasingly studied over the past decades because of its environmental benefits and superior engineering properties. However, there is …
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Physical, chemical, and geotechnical properties of coal fly ash: A global review Open
In 2015, fly ash utilization rates were 70% for China, 62% for India, and 50% for the US. This leaves substantial potential for increased utilization. This article summarizes available literature concerning physical and chemical and geotec…
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Application of response surface methodology (RSM) for optimization of leaching parameters for ash reduction from low-grade coal Open
Coal is the world’s most abundant energy source because of its abundance and relatively low cost. Due to the scarcity in the supply of high-grade coal, it is necessary to use low-grade coal for fulfilling energy demands of modern civilizat…
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Potential applications of geopolymer concrete in construction: A review Open
The environmental aspects of sustainable development in the construction industry consist of the utilization of secondary raw materials and materials which can be recycled in the design and construction of new structures. The preliminary a…
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Human health and environmental impacts of coal combustion and post-combustion wastes Open
Due to its high energy generation potential, coal is widely used in power generation in different countries. Although, the presence of carbon, hydrogen and sulfur in coal facilitates the energy generation in coal combustion, some pollutant…
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Advances in alkali-activation of clay minerals Open
To future-proof alkali-activation technology, there is a need to look beyond well-established precursors such as fly ash and blast furnace slag, due to resource competition, geographical distribution and technical limitations. Clay mineral…
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Zeolite synthesis from low-cost materials and environmental applications: A review Open
Zeolites with the three-dimensional structures occur naturally or can be synthesized in the laboratory. Zeolites have versatile applications such as environmental remediation, catalytic activity, biotechnological application, gas sensing a…
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Predicting the compressive strength of concrete with fly ash admixture using machine learning algorithms Open
The cementitious composites have different properties in the changing environment. Thus, knowing their mechanical properties is very important for safety reasons. The most important in the case of concrete is the Compressive strength (CS).…
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Mechanical and durability properties of fly ash geopolymer concrete containing recycled coarse aggregates Open
© 2016This paper presents mechanical and durability properties of geopolymer concrete containing recycled coarse aggregate (RCA). The RCA is sourced from local construction and demolition (C&D) waste in Perth, Australia. The RCA is used as…
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Presence of thallium in the environment: sources of contaminations, distribution and monitoring methods Open
Thallium is released into the biosphere from both natural and anthropogenic sources. It is generally present in the environment at low levels; however, human activity has greatly increased its content. Atmospheric emission and deposition f…
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Durability Performance of Geopolymer Concrete: A Review Open
Geopolymer concrete is produced from the geopolymerization process, in which molecules known as oligomers integrate to form geopolymer networks with covalent bonding. Its production expends less thermal energy and results in a smaller carb…
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Structure and properties of mortar and concrete with rice husk ash as partial replacement of ordinary Portland cement – A review Open
In order to arrest the incidence of global warming brought about by the emission of greenhouse gases notably CO2 into the atmosphere, the use of materials that can substitute the material responsible for greenhouse gases is being promoted …
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Calcium Carbonate Precipitation for CO2 Storage and Utilization: A Review of the Carbonate Crystallization and Polymorphism Open
The transformation of CO2 into a precipitated mineral carbonate through an ex situ mineral carbonation route is considered a promising option for carbon capture and storage (CCS) since (i) the captured CO2 can be stored permanently and (ii…
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Technologies for the management of MSW incineration ashes from gas cleaning: New perspectives on recovery of secondary raw materials and circular economy Open
Environmental policies in the European Union focus on the prevention of hazardous waste and aim to mitigate its impact on human health and ecosystems. However, progress is promoting a shift in perspective from environmental impacts to reso…
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Assessing, Understanding and Unlocking Supplementary Cementitious Materials Open
The partial replacement of Portland clinker by supplementary cementitious materials (SCM) is one of the most popular and effective measures to reduce both costs and CO2 emissions related to cement production. An estimated 800 Mt/y of blast…
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Stabilization of expansive soils using chemical additives: A review Open
Volume instability of expansive soils due to moisture fluctuations is often disastrous, causing severe damages and distortions in the supported structures. It is, therefore, necessary to adequately improve the performance of such soils tha…
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Fly ash properties, characterization, and applications: A review Open
Fly ash (FA) is the principal industrial waste byproduct from the burning of solid fuels. FA is a powdery solid that is constituted mostly of unburned carbon (UC), metal oxides (Si, Fe, Ca, and Al), and other inorganic substances. UC is an…
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Compressive strength prediction of fly ash-based geopolymer concrete via advanced machine learning techniques Open
Concrete is a widely used construction material, and cement is its main constituent. Production and utilization of cement severely affect the environment due to the emission of various gases. The application of geopolymer concrete plays a …
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Eco-friendly high strength, high ductility engineered cementitious composites (ECC) with substitution of fly ash by rice husk ash Open
In this study, an agricultural waste-rice husk ash (RHA) is proposed to substitute fly ash in high strength, high ductility engineered cementitious composites (ECC). The experimental results showed that the substitution of fly ash by RHA a…
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Fly ash-based geopolymers containing added silicate waste. A review Open
This review summarizes different types of industrial wastes such as biomass ash, red mud, recycled glass and heavy metals waste, in their application for geopolymer production. These wastes, which are currently abundant and urgent to dispo…
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The Use of Municipal Solid Waste Incineration Ash in Various Building Materials: A Belgian Point of View Open
Huge amounts of waste are being generated, and even though the incineration process reduces the mass and volume of waste to a large extent, massive amounts of residues still remain. On average, out of 1.3 billion tons of municipal solid wa…
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Mechanical and durability properties of sustainable self-compacting concrete with recycled concrete aggregate and fly ash, slag and silica fume Open
This research aims to maximize the content of supplementary cementitious material (SCM) and recycled concrete aggregate (RCA) in self-compacting concrete (SCC) by using a combination of fly ash, slag and silica fume. A sustainable SCC was …
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Sustainable use of industrial-waste as partial replacement of fine aggregate for preparation of concrete – A review Open
Utilisation of industrial waste materials in concrete compensates the lack of natural resources, solving the disposal problem of waste and to find alternative technique to safeguard the nature. There are a number of industrial wastes used …
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Prediction of Compressive Strength of Fly Ash Based Concrete Using Individual and Ensemble Algorithm Open
Machine learning techniques are widely used algorithms for predicting the mechanical properties of concrete. This study is based on the comparison of algorithms between individuals and ensemble approaches, such as bagging. Optimization for…
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Production of Sustainable Construction Materials Using Agro-Wastes Open
The construction sector, in modern times, is faced by a myriad of challenges primarily due to the increase in the urban population and dwindling natural resources that facilitate the production of construction materials. Furthermore, highe…
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Fly ash-based adsorbent for adsorption of heavy metals and dyes from aqueous solution: a review Open
A critical global issue in the 21st century is water shortage, as well as its pollution with noxious metal ions and organic dyes. To extract these pollutants from wastewater, a variety of traditional methods have been employed but they lac…
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Mechanical Properties of Geopolymer Composites Reinforced with Natural Fibers Open
Geopolymer composites have recently become a promising ecological alternative to the traditional cementitious materials. They are cost-effective, environmentally friendly and their production involves relatively small amount of energy. The…
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A Review on the Durability of Alkali-Activated Fly Ash/Slag Systems: Advances, Issues, and Perspectives Open
Alkali-activated materials (AAMs) have high potential as alternative binder to ordinary portland cement (OPC), because of their high performance beside lower CO2 emissions. While there is a general consensus about their strength advantages…
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Compressive Strength of Sustainable Geopolymer Concrete Composites: A State-of-the-Art Review Open
The building industry, which emits a significant quantity of greenhouse gases, is under tremendous pressure due to global climate change and its consequences for communities. Given the environmental issues associated with cement production…
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Fly-ash based geopolymer mortar for high-temperature application – Effect of slag addition Open
Geopolymers are used as a Portland cement alternative in some applications. The motivation for using geopolymers is their capacity of the by-products and waste incorporation, contributing to a cleaner environment. The present study aims to…