Project Title: Use of soil-steel slag-fly ash mixtures in subgrade applications Principal Investigator (PI): Prof. Monica Prezzi Project Administrator (PA): _____ Note: If more than one implement ...
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Amelioration Effect of Fly Ash and Powdered Ground Steel Slag for Improving Expansive Subgrade Soil. February 2023. Journal of Engineering 2023 (4):1-9. …
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The main mineral components of the raw coal gangue are kaolinite (52.2%), mica (16.9%) and quartz (16.1%), and the main chemical components of the low-heat and low-carbon coal gangue are SiO 2, Al 2 O 3 and Fe 2 O 3. ② Slag: S75 slag was collected from Handan Jinyu Taihang Cement Company (Hebei, China). ③ Fly ash: Grade Ⅱ fly …
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Most of the slag (50%) is used in road projects, sintering, iron-making and in recycling in ... plastering mortar which has 600 mesh surface area comprises mineral slag, steel slag, furnace slag, fly ash, desulphurization gypsum, iron ore tailings and ... Kumar A (2014) Utilisation of wastes from integrated steel plant with special reference to ...
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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 inexpensive source of activated carbon that plays an important role in FA adsorption capacity.
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Effect of amendments on soil pH and labile metal con- centrations Application of fly ash and steel slag signiï¬ cantly increased soil pH from 3.94 to 5.39 and from 3.94 to 5.16, respectively (P < 0.05). The addition rate of steel slag at 3 g kgâˆ'1 gave an increase in soil pH similar to that caused by 20 g kgâˆ'1 fly ash.
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To adding the steel slag – fly ash in the permeability is decreased the voids are percent in the soil. The increasing the percentage of steel slag in the mixture is reduce the soil – fly ash air voids. To increasing the steel slag the coefficient of permeability is reduced. From the economic analysis it is found that, a substantial save in ...
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The use of fly ash as a stabilizer for SS base has been widely studied, as in LFSS [59], lime-fly ash stabilized steel slag and crushed stone [71], fly ash-steel slag soil [72], and fly ash-steel ...
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This Best Practice Guide shows that concrete in corporating fly ash and slag in proportions less. than 20 to 30%, and 25 to 35%, respectively, is generally considered equivalent to portland ...
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Incorporating slag and fly ash into sludge ash greatly enhanced the strength and durability of sludge ash cementitious materials, improving its resistance to water absorption and chloride migration. The mixes with 20 % sludge ash and 10 % slag also achieved 10 % higher strength than mixes containing 30 % sludge ash, with the 28 …
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The WLT indicates the potential for contaminant release from fly ash or mixtures, but does not evaluate how a fly ash or fly ash mixture will impact groundwater (Bin-Shafique et al., 2002). Leaching of heavy metals from the dumped fly ash and steel slag may have negative impact on the environment should be reduced by leaching …
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2.2.. SynthesisThe synthesis of geopolymer bodies was performed by following the method based on the fly ash/slag/K-silicate/H 2 O system reacting without thermal activation. Fly ash was mixed with blast furnace slag from a steel plant in the Czech Republic (Table 1), water and an activator solution.This consists of a potassium …
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PDF | On Jan 1, 2004, Nabil Bouzoubaâ and others published Use of Fly Ash and Slag in Concrete: A Best Practice Guide | Find, read and cite all the research you need on …
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This project by the Maharashtra State Road Development Corporation (MSRDC) has been focused on reducing environmental impact by the use of fly ash and blast furnace slag in its concrete. Anil Gaikwad, managing director of the MSRDC, said "Fly ash and ground granulated blast furnace slag were also used in the concrete," He …
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Abstract. For existing coal-fired power plants, current methods of utilizing ash and slag waste may be considered in addressing new environmental and economic risks. However, for new power sources, environmental considerations are much more important in selecting the coal-combustion technology. Technology based on a …
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In this study, nine concrete mixes were produced using raw materials that include 53 grade ordinary Portland cement (OPC), siliceous fly ash (FA) sourced from an anthracite coal-based Indian thermal power plant (Chennai city), potable water, polycarboxylate ether (PCE)-based superplasticizer (SP), slag sand (SS) and crushed …
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The mechanical properties and microstructure changes of loess under varying dosages of steel slag–fly ash geopolymers and curing age were investigated through a …
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on the bulk use of steel slag–y ash, and particularly on the application of a stabilized steel slag–y ash composite as the DLC layer in rigid pavement construction. This study …
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This points to a significant untapped potential for the increased utilization of fly ash and slag in various applications. Fly ash (FA) constitutes 80% of the total residue stemming from the combustion of pulverized coal in coal-fired power plants [6, 21]. Fly ash enhances the strength at later ages, segregation, and pumping ability of concrete ...
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Steel slag and fly ash-based steel fiber reinforced geopolymer mortars have been prepared and studied for its mechanical properties where 0.4% and 0.5% of ... & Udayabhanu, G. (2015). Characterization of gypsum synthesized from LD slag fines generated at a waste recycling plant of a steel plant. New Journal of Chemistry, 39, …
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The production and application of steel slag and fly ash composite portland cement (SFCPC) have at least the following advantages: 1. It can reduce the cost of cement production as well as enhance the utilization factor of SS and FA. 2. The reduction of clinker can decrease air pollution compounds, such as CO 2, SO 2, NOx, during …
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Class C materials are often high-calcium (10% to 30% CaO) fly ashes with carbon contents less than 2%. Many Class C ashes when exposed to water will hydrate and harden in less than 45 minutes. Some fly ashes meet both Class F and Class C classifications. Fly ash is used in about 50% of ready mixed concrete (PCA 2000).
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In accordance with the national energy strategy, the development of coal-fired power stations in Russia, especially in Siberia and the Far East, calls for utilization of their ash and slag wastes. The total quantity of ash and slag in Russian tailings exceeds 1.5 billion t. These wastes cover an area of more than 220 km2. The utilization of these …
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The slag belonged to ground granulated blast slag, S105 grade, provided by Gongyi Longze Water Purification Material Co., Ltd., in Henan, China, the fly ash was F class low calcium fly ash, supplied by Zhengzhou Rongchang Sheng Environmental Protection Material Co., Ltd., in Henan, China, and the red mud was the by-product of …
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The article investigates how flue gas desulfurization gypsum (FGDG) modifies the properties of alkali-activated materials (AAMs) based on fly ash and ground granulated blast-furnace slag (GGBS). It reveals the role of FGDG in enhancing the strength, durability and microstructure of AAMs. The article also discusses the potential of FGDG as a green …
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The fly ash produced in the steelmaking process replaces iron ore by processing into briquette to reduce the consumption of iron ore in the converter blowing process, thereby realizing the recycling of the by-products of the converter steelmaking. Tags : binder fly ash sludge. What is fly ash The steelmaking industry is a typical resource ...
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The fly ash was obtained from Wuhan Qingshan Thermoelectric Plan, the specific surface area of this fly ash is 293 m 2 /kg, the apparent density is 2210 kg/m 3, its chemical compositions are listed in Table 1, its particle size distribution is illustrated in Fig. 2.. The phosphogypsum was obtained from Wuhan Inorganic Salt Chemical Plant, its …
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Due to the free lime in steel slag, they determined that samples formed of steel slag cracked during the autoclaving process, the samples containing 80% steel slag and 20% silica powder had 23 MPa compressive strength, the samples having 80% steel slag and 20% fly ash had 5.3 MPa, and the samples having 50% steel slag and …
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FA, or pulverised fuel ash, is a byproduct of coal-fired power plants and is used as a mineral additive in cement and concrete. Fig. 1 shows a typical layout of a coal-burning generating station. Pulverized …
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For steel slag-based CLSM, the resilient modulus ranges from 250 to 350 MPa for dredged silts with 1.5% cement and 5% fly ash and utilized as sub-base materials (Chompoorat et al. 2021). ...
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Modification of fly ash geopolymer with steel slag: Preparation of steel slag-fly ash geopolymer paste using steel slag andvarying dosages of NaOH-Na2SiO3 …
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This paper presents an experimental study aimed at transforming fly ash and steel slag into an environmentally friendly construction material for green building …
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Supplementary cementitious materials (SCMs), such as fly ash (FA), ground granulated blast-furnace slag (GGBS) [33], silica fume (SF), metakaolin [34], limestone powder [35], steel slag powder [36 ...
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Two mixtures were tested, LWAFA: made of fly ash and LWA-SLFA made of a 50% mixture of slag milled at particle size < 300μm and fly ash. The thermal treatment for …
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This study explores the utilization of steel slag and fly ash in road construction to address the increasing demand for pavement materials and the scarcity of natural aggregates. For this purpose, steel slag–fly ash composite is stabilized with lime and ground granulated blast furnace slag (GGBS) to assess their utility as a subbase …
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The results show that the compressive strength and permeability coefficient of permeable bricks can reach a good level when the composite ratio of steel slag is 6%, fly ash is 30%, and the design ...
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The use of fly ash as a stabilizer for SS base has been widely studied, as in LFSS [59], lime-fly ash stabilized steel slag and crushed stone [71], fly ash-steel slag soil [72], and fly ash-steel ...
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