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High calcium solid sulfide fly ash High calcium solid sulfide fly ash High calcium solid sulfide fly ash
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Original ArticleComparative mechanical and microstructural
2021年11月1日 This paper investigates the effect of varying solid alkali activators on the fresh and hardened properties and microstructural changes of onepart geopolymers (OPGs) Single 2024年3月1日 This pretreatment strategy is the basis for the synthesis of high specific surface area electrode materials In our prior research, we found that SiO 2 in highcalcium fly ash Review A review on fly ash highvalue synthesis utilization and its To understand the formation mechanism of highcalcium fly ashes, the mineralogical, physical, and chemical properties of several high calcium fly ashes and their different density fractions Mineralogy and Chemical Composition of HighCalcium Fly Ashes In this paper, a comparative study has been made for physical and engineering properties of low calcium and high calcium Indian fly ash The grain size distribution of fly ash is independent of Geotechnical Properties of Low Calcium and High Calcium Fly Ash
The effects of calcium content of fly ash on hydration and
2023年8月20日 In this study, the effects of lowcalcium fly ash (LFA) and highcalcium fly ash (HFA) on C–S–H structure, hydration products, hydration heat, and compressive strength of 2012年3月3日 This study specifically examines the effects of silica derived from two separate sources ie, nanosilica and rice husk ash (RHA), and alumina (nanoalumina) on the setting, Effect of SiO2 and Al2O3 on the setting and hardening of high 2013年12月2日 This paper investigates the basic influential trends of varying compositions and properties of high calcium fly ash (HCFA) on selected properties of selfcompacting concrete The effect of highcalcium fly ash on selected properties of self 2018年9月7日 This work reports on an investigation of changes in physical and chemical properties of high calcium fly ash after recovering from the wetstored conditions Herein the Highcalcium fly ash recovery from wetstored condition and its
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Evaluation of the Chemical and Mechanical Properties of
2015年5月25日 Highcalcium fly ash (FH) is the combustion residue from electric power plants burning lignite or subbituminous coal As a mineral admixture, FH can be used to produce 2021年10月1日 This paper investigates the effect of varying solid alkali activators on the fresh and hardened properties and microstructural changes of onepart geopolymers (OPGs) Single Comparative Mechanical and Microstructural Properties of High 2014年5月23日 In this research effort, the role of calcium in geopolymers was investigated through a series of syntheses where a highcalcium fly ash was blended with a lowcalcium fly ash Increased calcium content led to accelerated setup times, increased compressive strength, and increased product formation Powder Xray diffraction results showed the majority of that The role of calcium in blended fly ash geopolymers2013年8月2日 This article studies the effects of the addition of diatomite on the properties of high calcium fly ash geopolymer pastes Diatomite was calcined at 800 °C and used to partially replace fly ash High calcium fly ash geopolymer containing
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Hybrid high calcium fly ash alkaliactivated repair material for
2022年1月1日 In this paper, the performance of hybrid high calcium fly ash (FA) alkaliactivated repair material for concrete exposed to sulfate environment was studied The high calcium fly ash (FA) was replaced with ordinary Portland cement (OPC), basalt fiber (BF) and silica fume (SF)2018年9月7日 Evaluation of the material properties is considerably essential This work reports on an investigation of changes in physical and chemical properties of high calcium fly ash after recovering from the wetstored conditions Herein the high calcium lignite fly ash with calcium oxide constituent in a range of 20%–30% is the focus of this studyHighcalcium fly ash recovery from wetstored condition and 2023年8月20日 Furthermore, compared the portlandite peak of UHPC with low and high calcium fly ash, the changes in peak intensity of HFA were more obvious than that of LFA, Effects of municipal solid waste incineration fly ash on the characterization of cementstabilized macadam Construct Build Mater, 207 The effects of calcium content of fly ash on hydration and 2015年5月25日 Highcalcium fly ash (FH) is the combustion residue from electric power plants burning lignite or subbituminous coal As a mineral admixture, FH can be used to produce highstrength concrete and highperformance concrete The development of chemical and mechanical properties is a crucial factor for appropriately using FH in the concrete industry To achieve Evaluation of the Chemical and Mechanical Properties of Hardening High
Comparative mechanical and microstructural properties of high calcium
2021年11月1日 Comparative mechanical and microstructural properties of high calcium fly ash onepart geopolymers activated with Na 2 SiO 3anhydrous and NaAlO 2 Author links open overlay panel Ooi WanEn a b , Liew YunMing a b , Heah ChengYong a c , Mohd Mustafa Al Bakri Abdullah a b , LongYuan Li d , Li Ngee Ho b , Foo Kai Loong e , Ong SheeWeen a b , 2019年9月13日 In this present experimental study, geopolymer cement is developed using high calcium fly ash and used in the production of onepart alkaliactivated bindersMechanical and microstructural properties of high calcium fly ash 2024年2月10日 The object of research is a coldbonded fly ash aggregate based on highcalcium fly ash from Berezovskaya GRES (Russia) The study presents a developed lightweight aggregate for concrete Properties of ColdBonded Lightweight Aggregate Based on High Calcium 2019年11月7日 The effectiveness of using high calcium fly ash and cement in stabilising finegrained clayey soils The best mixing ratio and watersolid ratio is 30% and 06 respectively for clay, Early mechanical properties of high calcium fly ash cement soil
Geopolymer Mortar Incorporating High Calcium Fly
2019年3月1日 Small amounts of silica fume were used to partially replace high calcium fly ash at 3–9% by weight to increase the strength of alkali and 0 60, and water/solid ratio variations of 0 32, 0 2017年6月22日 Solar energy is an important source of renewable and sustainable energy Thailand is near the equator and thus experiences hot weather throughout the year The average maximum temperature is 35 °C and can reach 40 °C in the summer time This outdoor heat exposure (OHE) was, therefore, used for the curing of a polypropylene (PP) fiber fiber Synthesis of polypropylene fiber/highcalcium fly ash 2017年7月1日 Request PDF High Calcium Fly Ash Geopolymer Stabilized Lateritic Soil and Granulated Blast Furnace Slag Blends as a Pavement Base Material Granulated Blast Furnace Slag (GBFS) was used as a High Calcium Fly Ash Geopolymer Stabilized Lateritic Soil and 2024年1月20日 The objectives of MSWI fly ash treatment involve volume reduction, heavy metal stabilization, dioxin elimination and resource utilization (Zacco et al, 2014)Currently, the common methods of treating MSWI fly ash include poststabilization landfilling, thermal treatment (like sintering or coprocessing in cement kilns) and chemical extraction (such as metal recovery) Acid controlled washing of municipal solid waste incineration fly ash
(PDF) Highcalcium fly ash recovery from wetstored
2018年8月28日 Herein the high calcium lignite fly ash with calcium oxide constituent in a range of 20%30% is the focus of this study Important characteristics of fly ash have been studied, To understand the formation mechanism of highcalcium fly ashes, the mineralogical, physical, and chemical properties of several high calcium fly ashes and their different density fractions (289 g/cm3) from a coalfired power plant were characterized by Xray diffractometry (XRD), field scanning electron microscopy equipped with energy dispersive Mineralogy and Chemical Composition of HighCalcium Fly 2013年8月1日 In these processes, calcium was first extracted from a highcalcium coal fly ash sample with NH4Cl solution The obtained leachate was subsequently carbonated by bubbling CO2CO2 Sequestration by Indirect Carbonation of HighCalcium 2012年7月11日 In this paper, 90W microwave radiation for 5 min plus a shortened heat curing period was applied to cure the fresh geopolymer paste Results showed that microwave radiation contributed to the dissolution of fly ash in the alkaline solution Numerous gel formations were observed in microscopic scale This resulted in a dense composite and strong bonding Resistance to acid and sulfate solutions of microwaveassisted high
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Comprehensive Utilization of Fly Ash SpringerLink
2019年5月23日 Ca content of fly ash has a major impact on the application of fly ash In general, fly ash with Ca content 20% is called high calcium fly ash []Fly ash includes strong cementitious ash (15 min internal condensation), intermediate 2022年2月21日 This paper investigates the hydrated phase assemblage, microstructure, and gel composition of sodium hydroxide (NaOH)activated fly ash–slag blends with either lowcalcium or highcalcium fly ash The results show that the nature of precipitated calcium–aluminosilicate–hydrate (CASH) and alkali aluminosilicatehydrate (NASH) Phase Analysis of AlkaliActivated Slag Hybridized with LowCalcium 2010年1月1日 In this paper, the synthesis of highstrength geopolymer using fine highcalcium fly ash was studied The effect of fineness of fly ash on the setting time of geopolymer paste, workability High Strength Geopolymer Using Fine High Calcium Fly AshKEYWORDS: class C fly ash, highcalcium fly ash, Powder River Basin coal, portland cement and fly ash paste, Xray diffrac tion, differential scanning calorimetry, ettringite, monosulfateCharacterization of HighCalcium Fly Ashes and Their Potential
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Dry Mix Slag—HighCalcium Fly Ash Binder Part One:
2023年3月31日 PDF Highcalcium fly ash (HCFA) solid form, have high solubility i n water, and, no t the least one, are quite chea p [4] [6] Shrinkage o f geopolymer dur ing hardening of slag binders wit 2011年6月1日 Highcalcium fly ash and alkaline solution were used as starting materials to synthesize the geopolymer The solidstate 29Si NMR spectra indicate a range of Si–O–Al environmentsEffect of chemical admixtures on properties of highcalcium fly ash Figure 1 Particle size distributions of raw slag and fly ash by laser diffraction Figure 2 XRD diffractograms of raw slag and fly ash powders This study investigates NaOHactivated hybrid fly ash slag binders, with all mixtures having an initial liquid (alkaline activator)tosolid (ie, raw FAF or FAC, and slag)Phase Analysis of AlkaliActivated Slag Hybridized with LowCalcium 2021年10月1日 Request PDF Comparative Mechanical and Microstructural Properties of High Calcium Fly Ash OnePart Geopolymers Activated with Na2SiO3Anhydrous and NaAlO2 This paper investigates the effect of Comparative Mechanical and Microstructural Properties of High Calcium
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Preparation and characterization of highstrength calcium
2015年8月7日 To realize the comprehensive utilization of coalfired industrial solid wastes, a novel highstrength board was prepared from calcium silicate slag, fly ash, and flue gas desulfurization (FGD) gypsum The changes in mineral phases, chemical structure, and morphology during hydration were investigated by Xray diffraction (XRD), Fourier transform 2020年4月28日 Coal fly ash (CFA), a solid waste produced by coalfired thermal power plants during the combustion of pulverized coal, is currently one of the largest solid wastes in China (Yao et al 2015) In 2018, the annual output of CFA in China exceeded 550 million tons, and owing to insufficient utilization, the total accumulated CFA has exceeded 3 billion tonsUtilization of coal fly ash in China: a minireview on challenges 2008年5月1日 The samples were also studied by Xray diffractometry (XRD) and Fourier transform infrared (FTIR) spectroscopy XRD (Fig 1) showed that no new crystalline phases were observable in any of the contaminated samples; the only observable sharp peaks were those due to unreacted mullite, quartz and iron oxide phases from the fly ash, as well as some calcite as The role of sulfide in the immobilization of Cr(VI) in fly ash 2023年3月17日 In order to reduce the cost of industrial production of zeolite, raw materials of silica and alumina have been substituted by bentonite (Mamaghani et al 2022), lithium slag (Wang et al 2022a), high silicon solid waste incineration fly ash (Chen et al 2020), sludge (Rozhkovskaya et al 2021), kaolinite (RamírezZamora et al 2018), and coal fly ash (Yang et Adsorption of hydrogen sulfide by ironbased adsorbent derived from fly
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Compressive strength development and durability properties of high
2022年1月17日 This negative effect has been caused by the presence of crystalline calcium components such as lime, anhydrite and amorphous calcium compounds in the highcalcium Shivee Ovoo fly ash Despite of several back and forth research works to the HCFA, there still appear to be some unsolved questions with respect to the mineralogical composition of fly ash 2015年11月26日 This study presents an investigation into the durability of geopolymer concrete prepared using high calcium fly ash along with alkaline activators when exposed to 2% solution of sulfuric acid and Durability Study on High Calcium Fly Ash Based PDF On Nov 18, 2023, Moh Muntaha and others published THE USE OF ALKALINE ACTIVATORS WITH HIGH CALCIUM FLY ASH AS SOFT CLAY STABILIZATION MATERIALS Find, read and cite all the research you THE USE OF ALKALINE ACTIVATORS WITH HIGH 2019年3月20日 Finally, the broadest part of the activated highcalcium fly ash spectrum at 28 days from −90 ppm to −100 pm indicates the presence of Q 3 and Q 4 environments mainly issued from the remaining vitreous phase of highcalcium fly ash, and in accordance with the previous observations of unreacted highcalcium fly ash particles at 28 days by SEM (see Use of alkali activated highcalcium fly ash binder for kaolin clay
Setting Time, Strength, and Bond of HighCalcium Fly Ash
2014年10月31日 In this paper, setting time, strength and bond of highcalcium fly ash geopolymer concrete were investigated The highcalcium fly ash was from Mae Moh power plant in northern Thailand2020年6月28日 Model I geopolymers typically consist of pozzolanic materials with high aluminosilicate content and low calcium oxide content, ie, low calcium (Class F) coal fly ash [80,81], which are activated (PDF) Review of FlyAshBased Geopolymers for Soil2024年1月1日 Firstly, the ultrasonic technology was employed to enhance the washing process of MSWI fly ash After washing, the soluble chloride ions in the MSWI fly ash were removed, and simultaneously, the soluble heavy metals were adsorbed and solidified within the MSWI fly ash under the influence of ultrasound (Lin et al, 2023)Process optimization and mechanism for removal of high 2022年9月1日 Iron ore sintering is the first hightemperature process in the iron and steel industry The annual sinter output of China has exceeded one billion tons [20]The iron ore sintering process used to treat waste incineration fly ash mainly has the following advantages: (i) Waste incineration fly ash contains a large amount of CaO, which can be used as calcium Mineralization behavior and strengthening technology of high calcium
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Effects of low and highcalcium fly ash on the water resistance
2020年1月10日 The use of highcalcium fly ash (class C) with a high content of calcium oxide in the free state (CaOfree) for the production of artificial aggregate is impossible without neutralizing the fly ash 2024年2月10日 The object of research is a coldbonded fly ash aggregate based on highcalcium fly ash from Berezovskaya GRES (Russia) The study presents a developed lightweight aggregate for concrete, consisting of highcalcium fly ash, microsilica and MgCl 2 and Ca(NO 3) 2 additives The physical and mechanical properties of the filler were experimentally investigatedProperties of ColdBonded Lightweight Aggregate Based on High Calcium