Benefits of slag and fly ash ScienceDirect
Slag concrete behaved better than fly ash concrete did under high temperature exposure for all case, some of slag concrete even behaved better than SCMs as fly ash (FA) and slag are commonly used as cement replacement in concrete pavements, bridges, residential and commercial buildings. The use of these Effect of fly ash and slag on properties of normal and high
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Properties of concrete mixtures containing slag cement and fly ash
Fly ash has been used to make high strength concrete with low drying shrinkage in a 50% fly ash–50% cement mixture that outperformed the 100% portland Zhao, Y., T. Shi, L. Cao, L. Kan, and M. Wu. 2021. “Influence of steel slag on the properties of alkali-activated fly ash and blast-furnace slag based fiber reinforced Combination of Slag and Fly Ash to Prepare Engineered
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Compressive strength prediction of fly ash and blast furnace slag
The matrix refers to the overall composition of the concrete, including the types and proportions of various components. In the case of GPC, these components The use of FA and blast furnace slag as an additive to cement and concrete mixtures allows for waste recycling, reduces the cost of producing building Influence of Fly Ash Additive on the Properties of Concrete with Slag
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Sustainability Free Full-Text Effect of Activator and Mineral
The high autogenous shrinkage of alkali-activated fly ash/slag (AASF) poses a significant concern for the widespread application of AASF in structural 1. Introduction. Research on low-emission concrete, also called green concrete, is focused on waste recycling [1,2] and the reduction of Portland clinker in the concrete composition without affecting mechanical properties.Concrete additives, such as fly ash and blast furnace slag, are used for this purpose [3,4,5].Fly ash (FA) is a by-product Influence of Fly Ash Additive on the Properties of Concrete with Slag
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Fly ash and slag ScienceDirect
Low-calcium (FA) and high-calcium (HCFA) fly ash and granulated blast furnace slag (GBFS) are the most widely known, standardized and used SCMs in the composition of cement and concrete. In the last 4 years, scientific work has focused on improving binder properties (e.g. long setting time, low early strength etc.) containing Semantic Scholar extracted view of "Benefits of slag and fly ash" by J. Bijen. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 214,486,399 papers from all fields of science. Search. Sign In Create Free Account. DOI: 10.1016/0950-0618(95)00014-3;Benefits of slag and fly ash Semantic Scholar
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A Comprehensive Review on Fly Ash-Based Geopolymer
Yang et al. manufactured a fly ash addition with a slag-based geopolymer, with a ratio of slag to fly ash of 0, 0.25, as well as 0.50, along with the exposure of the precursor materials to a 3% NaCl solution for 72 h. The CASH gel in the fly ash plus slag-based geopolymer led to a lower diffusion of chloride than the NASH gel.The incorporation of recycled aggregates and cementing materials (fly ash, slag and silica fume) enhances the workability and compressive strength. The utilization of fly ash, slag and silica fume in concrete paves a way to minimize the usage of cement which results in the reduction in natural resources exploitation (Guo et al., 2020). EAF slagRecent applications of steel slag in construction industry
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Examining the endpoint impacts, challenges, and opportunities of fly
The use of fly ash at 20% replacement by weight of cement benefits resources more significantly than human health and the ecosystem. The use of chemical admixture to improve strength has aFly ash, slag and silica fume were used to partially replace cement at varying proportions in samples (e.g., 25 wt% for fly ash, 25 wt% for slag, and 10 wt% for silica fume, and denoted as C&FA, C&S and C&SF, respectively). To ensure homogeneity of the pastes, the. Results and discussion. Fig. 2 reveals the micromorphology of the Insights into the microstructure evolution of slag, fly ash and
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The properties of the self-compacting concrete with fly ash
Results showed that the slag significantly improved the impermeability and air voids distribution of cement mortars, while the fly ash did not benefit the impermeability, as well as the air void in mixed mortars. The heat releasing rate and hydration product composition of the slag mixed paste were superior to that of the FA.2.1. Crystalline phases. FA crystalline phases account for 5 to 50% of its mass. The crystalline phases consist of ten phases. Anhydrite (CuSO 4), Merwinite, Periclase, and C3A are found in class C fly ash.In addition to mullite, melite, quartz, hematite (Fe 2 O 3), magnetite (Fe 3 O 4), and lime.Anhydrite results from O 2, SO 2, and CaO Fly ash properties, characterization, and applications: A review
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Effect of Various Fly Ash and Ground Granulated Blast Furnace Slag
2.1. Materials and Mix Proportion. The raw materials in this study included Ordinary Portland cement (strength class 42.5) with a Blaine fineness of 375 m 2 /kg in accordance with Chinese Standard GB 175-2020 [].Two types of SCMs, namely fly ash and GGBFS, were used in experiments in accordance with Chinese Standard GB/T 1596 The burning of bituminous coal produces a common type of fly ash with a very low CaO content, known as class F fly ash (FFA). Lignite and sub-bituminous coal are also used as new power fuels to produce class C fly ash (CFA) with high calcium content (Guo et al., 2017). It shows the common FA in Fig. 2 (a) and (e).Advances in geopolymer materials: A comprehensive review
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Benefit-cost analysis model of using class F fly ash-based green cement
Section snippets Methods. Some studies have focused on greenhouse emissions of concrete and cement, and the impact of fly ash content on the total emissions (O'Brien et al., 2009, Flower and Sanjayan, 2007), quantifying the benefits of using coal combustion products in sustainable construction (Ladwig, 2010), the social cost of In this study, commercial fly ash (FA) and ground granulated blast furnace slag (GGBFS, abbreviated ‘BFS’ in this paper), supplied by Wuhan SinoCem Intelligence Technology Co., Ltd. (China), were used as the precursors to prepare the alkali-activated fly ash/slag cement. The chemical composition of the raw powder was determined by X-rayEffects of sodium citrate on compressive strength and
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Frontiers Environmental and Mechanical Evaluation of
Limestone-calcined clay cement (LC3)—a family of clinker, calcined clay, and limestone filler mixes—is studied worldwide for its properties equivalent to those of Portland cement. Although slag and fly ash are no longer sufficient to keep up with current commercial blended cements, in the long run, these SCMs can support the development ofFig. 5 and Fig. 6, the maximum compressive strength and surface crack of geopolymer concrete with silica fume activator is 44.36 MPa and 0.147 mm curing in curing box for 7d at 20 °C, respectively, when ratio of calcined magnesite and slag to fly ash is 1.42, and mass of calcined magnesite is 133.3 g. The compressive strength and surface Performance of geopolymer concrete activated by sodium
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Fly Ash in Concrete Advantages & Disadvantages of Fly Ash Concrete
Fly Ash Composition. Fly ash composition are as follows. Silicon Oxides. Aluminium Alloy. Fly ash and Slag will typically be 18% cheaper than Portland cement. When a mix includes 20% fly ash, this will provide savings of 3.5% in cost. The use of fly ash in concrete provides benefits such as improved workability, increased strength2 Geopolymer Concrete Composition GPC primarily consists of binder paste, aggregates (both fine and coarse), and admixtures as shown in Fig. 1. For fly ash-based, GPC binder paste is made from fly ash and alkaline activators [14–16]. Fly ash is a waste product obtained from coal-basedpower plants. It is collected in electrostatic precip-Fly Ash Based Geopolymer Concrete: a Comprehensive
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Ecofriendly geopolymer concrete: a comprehensive review
GPC made with coal fly ash-slag has increased weight loss and strength loss. GPC with bio-additives has high resistance toward sulfate and chemical attack (Karthik et al. 2017). Tennakoon et al. studied chloride ingress and corrosion of steel on fly ash-slag geopolymer concrete. Slag-based GPC has a lower chloride diffusion coefficient andGround granulated blast furnace slag (or simply slag) and class F fly ash [54] served as the binding material in the alkali-activated concrete. Table 1 summarizes the chemical composition and physical properties of as-received slag and fly ash. The respective specific gravity, specific surface area, and unit weight of the former were 2.70, 425 m 2 Enhancing the performance of Alkali-Activated Slag-Fly ash
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