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This paper is an effort directed towards a specific understanding of the efficiency of fly ash in concrete, considering the strength to water cement ratio relations, age and …
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The fabrication of conventional concrete, as well as remains from demolition, has a high environmental impact. This paper assessed the eco-efficiency of concrete made with uncarbonated recycled concrete aggregates (RCA) and fly ash (FA). Two concrete series were produced with an effective water/cement ratio of 0.50 (Series 1) and 0.40 (Series 2).
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T1 - Producing energy efficient concrete using Illinois coal fly ash. AU - Chou, Mei-In M. AU - Chou, Sheng-Fu J. N1 - Conference Proceedings. PY - 2009. Y1 - 2009. N2 - Autoclaved aerated concrete (AAC) is a lightwt., energy-efficient, fire-retardant construction material which is used widely in Europe.
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35 sustainability, partial replacement of cement with fly ash in concrete can be an effective way 36 of reducing overall cement production, which in turn will reduce GHG emissions, energy 37 …
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The global construction industry is witnessing a steady rise in cement demand, contributing significantly to CO2 emissions, while concurrently generating substantial quantities of waste materials, notably construction and demolition waste (CDW). This study explores the utilization of these waste streams in developing sustainable construction materials, focusing on …
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Among different SCMs used in concrete production, fly ash (FA) an industrial by-product of mineral coal burning made up from fine fuel particles found from flue gases and coal-fired boilers, and it can be employed as an SCM to minimize cement usage in concrete for lowering CO 2 emissions [8,11,12,13,14,15]. It was reported that more than about ...
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The Portland cement CEM I 42,5 R produced at PJSC "Volyn-cement" with specific surface of 330 m 2 /kg, the retaining on sieve №008 is 3,2%, the initial setting time is 1 h 50 min, the final setting time is 5 h 40 min, was used for the experiments. The fly ash (FA) from the Burshtyn TPP and light microsphere (cenosphere) are used for aerated concrete …
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Novel high-efficiency solid particle stabilizer: Effects of modified fly ash on properties and concrete Author links open overlay panel Qiang Song a d e, Yingjie Zou a, Peng Zhang a, Shipeng Xu a, Yuxin Yang a, Jiuwen Bao a …
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Upgraded fly ash can be defined as the type of fly ash which has been re-processed via certain chemical or physical processes (upgrading processes) in order to comply with the quality standard for use in concrete. In the United States, ASTM has defined the C618 standard, whilst in Europe the standard for coal combustion products is the BS EN ...
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In order to improve the strength and durability of concrete, various replacement levels of 15% and 20% fly ash are used to replace cement. By combining 20% fly ash with a superplasticizer, a reasonable performance in the higher displacement level was achieved, followed by higher stiffness degradation, ductility, and energy absorption [10].
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An energy-dispersive x-ray analyser (EDXA) was performed using a computer program to point count the particles of the amorphous phases. ... Production costs can be reduced by the partial replacement of cement with fly ash. Generally, the amount of fly ash to be added ranges from 15 to 35 wt% and can even reach 70 wt% for concrete in ...
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A growing body of evidence has shown the potential for emissions reduction through efforts focusing on the supply side of the cement and concrete cycle, including energy efficiency improvements 7 ...
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The critical speed was optimized to enhance the energy efficiency of fly ash classification. ... but also improves the late durability of concrete [6]. The particle size of fly ash is one of the main factors affecting the properties of concrete because the build-up and nucleating agent effects during cement hydration depend mainly on the ...
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High-volume fly ash concrete (HVFAC) is a concrete generally defined with at least 50% of the Portland cement replaced by fly ash. From: Journal of Cleaner Production, 2017. ... Emerging energy-efficiency and CO2 emission-reduction technologies for cement and concrete production: A technical review. Ali Hasanbeigi, ...
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For a selected fly ash/cement (a/c) ratio, the Bolomey approximation was also assumed for the correlation f a versus (c + a)/w for the concrete with fly ashes (CFA and FFA), as shown by the Eq. (2): (2) f a = A a [(c + a) w] + B a where A a and B a are constant parameters, and their values are also listed in Table 4, for each fly ash concrete ...
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This study investigated the workability of concrete mixes incorporating ordinary Portland cement, fly ash, and alccofine in varying proportions, utilizing slump tests as the …
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AbstractThe present study focuses on the innovative technique for making rectangular and circular hollow concrete blocks using fly ash (FA) and recycled concrete aggregates (RCA). ... J., and N. Saikia. 2013. "Recycled aggregate in concrete." In Green energy and ... National Conf. on Recent Trends in Architecture & Civil Engineering towards ...
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The composition includes cement, fly ash, quick lime, gypsum, and aluminium powder, showcasing AAC blocks as lightweight, eco-friendly, and cost-efficient with high compressive strength. ... Light-transmitting concrete (LTC) for energy-efficient buildings includes the necessity for additional investigation to assess LTC's performance in various ...
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Among different SCMs used in concrete production, fly ash (FA) an industrial by-product of mineral coal burning made up from fine fuel particles found from flue gases and coal-fired …
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A quantitative understanding of the efficiency of fly ash as a mineral admixture in cement-based materials is essential for its effective utilisation. The present paper is directed towards a specific understanding of the efficiency of fly ash in cementitious materials systems by considering the independency of fly ash and its dependency on the characteristics of the …
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This study developed a novel TESCM by integrating cement mortar with polyethylene glycol@SiO 2-coated eutectic hydrated salt/fly ash cenosphere encapsulated PCM, in order to improve the mechanical property and cost-effectiveness. Scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and attenuated total reflection Fourier ...
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As a replacement for cement, fly ash concrete made from recovered ash could deliver the same benefits. In another study, Wirth et al. [37] ... This approach is necessary to manage new products and additives and produce cement and concrete energy-efficient and environmentally [149], [150]. Assessing structures at the nanometer scale can lead to ...
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Autoclaved Aerated Concrete based on Fly Ash in Density 350kg/m 3 as an Environmentally Friendly Material for Energy - Efficient Constructions ... The following conclusions can be made based on the results of this investigation: x production autoclaved aerated concrete based on fly ash in density 350 kg/m3 is possible, x autoclaved aerated ...
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Its use in concrete production consumes less energy and offers improved efficiency and building performance. For each ton of Fly Ash used in place of traditional cement, a reduction of roughly 0.9 tons of carbon dioxide is …
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"Low carbon and resource efficient technology: Scaling up of fly ash brick technology in India." Sci. Ind. Res. 63: ... Naik, T. R., and S. S. Singh. 1991. "Superplasticized structural concrete containing high volume of Class C fly ash." J. Energy Eng. 117 (2): 87–96. https ... Optimizing the use of fly ash in concrete, 24. Skokie, IL ...
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Fly ash is a by-product of coal combustion in thermal power plants and has the potential to partially replace cement in concrete mixtures, reducing the need for cement production and associated CO2 emissions (Gupta et al., 2021). Fly ash can in some applications improve the concrete's workability, durability, and resistance to chemical attacks ...
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The energy efficiency of cement plants strongly depends on the type of kiln used for clinkerisation [49]. Cement kilns have evolved from long wet kilns to state-of-the-art dry kilns with a calciner, a 6-stage preheater and a high-efficiency cooler. ... For instance, Khalil et al. [82] investigated the possibility of completely replacing ...
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Globally, the cement industry accounts for approximately 5 percent of current anthropogenic carbon dioxide (CO 2) emissions.World cement demand and production are increasing significantly, leading to an increase in this industry's absolute energy use and CO 2 emissions. Development of new energy-efficiency and CO 2 emission-reduction technologies …
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CSI/ECRA 2009) and cross-cutting (e.g., U.S. DOE AMO 2011) energy-efficiency technologies for the cement industry that have already been commercialized. However, information is scarce and scattered regarding emerging or advanced energy-efficiency and low-carbon technologies for the cement industry that have not yet been commercialized.
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The LWHPC mixes explored in this study include sustainable cement solutions such as Portland limestone cement, varying water/binder ratios of 0.3 and 0.35, Leca contents ranging from 5 % to 20 % by volume, and two different pozzolanic supplements, namely silica fume and fly ash, which can be reducing porosity and enhancing durability and ...
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