Energy efficient cement free binder developed from industry …
In this paper, the physicochemical properties and hydration mechanism of cement-free binders developed from fluorogypsum has been discussed. The results showed maximum attainment of strength (38 MPa), low water absorption (<5%) and porosity (<10) with anhydrous calcium chloride and sodium sulphate activators. The …
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Effects of Fluorogypsum and Flue-Gas Desulfurization …
In order to explore the influence of the types of waste gypsum on the properties of alkali slag cement, fluorogypsum (FG) and flue-gas desulfurization (FGD) gypsum were comparatively investigated. Moreover, the action mechanisms of FG and FGD gypsum on the properties of alkali slag cement were analyzed. The results show that …
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Study on activation of fluorogypsum by sodium sulfate and …
The proposed fluorogypsum-based blend is durable in water and has a lower weight and lower cost than ordinary concrete. ... to modify MOC, aiming to reduce the environmental hazards and production ...
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A new type of paste filling material was created using fluorogypsum, a byproduct of hydrofluoric acid, as the raw material to address the issue of the filling material's high cost. The effects of five factors, including gangue, fly ash, fluorogypsum, lime content, and mass concentration on the physical and mechanical properties of filling material were …
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Effects of Fluorogypsum and Flue-Gas Desulfurization …
In order to explore the influence of the types of waste gypsum on the properties of alkali slag cement, fluorogypsum (FG) and flue-gas desulfurization (FGD) gypsum were comparatively investigated.
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Comparative study on modifications of pH-adjusted fluorogypsum …
Fluorogypsum was dissolved in deionized water at a water-to-fluorogypsum ratio of 2.0, stirred until uniform and let stand at 20 ± 5 °C until the time to be tested. ... J. Korean Soc. Hazard Mitig., 17 (6) (2017), …
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Activation of fluorogypsum for building materials
Fluorogypsum (FG), a by-product obtained during the production of hydrofluoric acid, satisfies these conditions, as it is capable of binding granular materials. Approximately 894,000 metric tons ...
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Activation of fluorogypsum for building materials | Request …
Fluorogypsum, a waste product of hydrofluoric acid industry, has been blended with Ca (OH) (2) and chemical additives followed by fine grinding to give …
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Formulation of Sulphate Resistant Super …
fluorogypsum received from South Africa and ordinary Po rtland cement. The SSC was eval uated for its physical, c hemical a nd mechanical properties as per I S: 6909: 1990 [26].
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Fluoride overdose Information | Mount Sinai
Fluoride can be harmful in large amounts. Acute exposure to dangerous amounts of fluoride is rare, and usually occurs in small children. Where Found. Fluoride is found in many …
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Study on activation of fluorogypsum by sodium sulfate and …
Abstract. Given the issues related to poor hydration activity, long setting time and low early strength of industrial by-product fluorogypsum (FG), the composite modifiers (Na 2 SO 4 and NaNO 2) were utilized to enhance its reactivity.The investigation of the mechanism involved the utilization of contemporary analytical methods, including X-ray diffraction …
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Mechanical Properties and Performance under …
Fluorogypsum (FG), a by-product obtained during the production of hydrofluoric acid, satisfies these conditions, as it is capable of binding granular materials. Approximately 894,000 metric tons ...
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Activation of fluorogypsum for building materials
Introduction Fluorogypsum (FG), a waste of hydrofluoric acid industry, has been studied for use as building material . Water-resistant binding materials can be produced from phosphogypsum, slag, cement, fly ash and lime sludge. Impurities (fluoride) present in FG may interfere with setting and strength development of plaster/ building …
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Fluorogypsum full data sheet
FLUOROGYPSUM is also known as anhydrous calcium sulphate USES FLUOROGYPSUM can advantageously replace traditional cement as a binder for screed mortars. It is widely used in floor screen applications because of its numerous advantages: better fluidity for self-levelling, greater dimensional stability, high mechanical strength and outstanding ...
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Investigation of properties of fluorogypsum-slag composite …
In India about 4.0 million tonnes of fluorogypsum, a cardinal waste material of the hydrofluoric acid industry, is produced per annum and poses the problem of disposal and pollution hazards as it sets too slowly to form any useful building materials, thus creating an environmental nuisance. The literature survey revealed that not much work …
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On thermal effects of early structure formation of fluorogypsum
This article presents results of a research on changes in energy parameters of fluorogypsum composition of normal consistency with introduction of various additives (μΔn) such as construction gypsum G-5AII and sodium sulfate. The effects were assessed by temperature changes in the binder – water system. In order to compare processes of …
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Studies on the Binder of Fly Ash-Fluorgypsum-Cement
In view of the poor hydration activity and difficult utilization of industrial by-product fluorogypsum, the effects of potassium carbonate (K 2 CO 3) and potassium bicarbonate (KHCO 3) on the hydration mechanisms of fluorogypsum (pH-adjusted to 7.3) were investigated and compared through hydration rate, hydration heat, solubility and …
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Microstructure and performances of sludge soil stabilized by
Quicklime, PC32.5 cement and fluorogypsum-based cementitious binder were employed as solidification agents, respectively. The employed quicklime is commercially available with 85% effective CaO and 247.2 m 2 /kg of specific surface area. The fluorogypsum-based cementitious binder is composed of 30% fluorogypsum, …
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Safety Management
One of the "root causes" of workplace injuries, illnesses, and incidents is the failure to identify or recognize hazards that are present, or that could have been anticipated. A critical element of any effective safety and health program is a proactive, ongoing process to identify and assess such hazards. ...
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Fluoride Toxicity: Practice Essentials, Pathophysiology, Etiology
Fluoride toxicity is characterized by a variety of signs and symptoms. [1] . In the United States, poisoning most commonly follows ingestion (accidental or intentional) …
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Mechanical properties and hydration mechanisms of high …
Fluorogypsum is a by-product of hydrofluoric acid production. China discharges approximately 1 million t of fluorogypsum every year, and the accumulation of fluorogypsum has reached 400 million t ...
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10 Common Excavation Hazards and Control Measures
3. Inhalation Hazards. Excavations can expose workers to hazardous atmospheres, which can cause severe health problems or even death. One of the most significant inhalation hazards is carbon monoxide (CO), a colourless, odourless gas produced when fuels such as gasoline, propane, or natural gas are burned.
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Study on the proportion of paste filling materials based on fluorogypsum
A new type of paste filling material was created using fluorogypsum, a byproduct of hydrofluoric acid, as the raw material to address the issue of the filling material's high cost. The effects of five factors, including gangue, fly ash, fluorogypsum, lime content, and mass concentration on the physi …
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Effects of Fluorogypsum and Flue-Gas
In order to explore the influence of the types of waste gypsum on the properties of alkali slag cement, fluorogypsum (FG) and flue-gas desulfurization (FGD) gypsum were …
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Fluorogypsum Plaster
Fluorogypsum Plaster is a building material used for plastering (external & internal), masonry work, bricks/blocks, building boards and tiles. It is manufactured as a dry powder from waste of Hydrofluoric acid plant. …
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Environmental Characteristics of By-Product Gypsum
Fluorogypsum Fluorogypsum is generated at the E.I. DuPont De Nemours & Com pany, Inc., HF Plant in LaPorte, Texas. The material is initially pro duced in the anhydrite form (CaS04). However, after neutralization with a lime slurry, the fluorogypsum will be converted primarily to the dihydrate form. EXPERIMENTAL INVESTIGATION
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What is Hazard? Types Of Hazards, Examples & Control …
What is Risk? Risk is the likelihood that a hazard will cause harm or damage. It is important to note that not all hazards will result in an accident or incident; the level of risk is determined by the severity of the potential harm or damage and the likelihood that it will occur.
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Effects of 1,2,3-Propanetricarboxylic Acid on the Hydration …
Request PDF | On Jan 1, 2023, Jianping Zhu and others published Effects of 1,2,3-Propanetricarboxylic Acid on the Hydration and Microstructure of Fluorogypsum | Find, read and cite all the ...
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Further study on property of fly ash-fluorogypsum-cement …
A new type of paste filling material was created using fluorogypsum, a byproduct of hydrofluoric acid, as the raw material to address the issue of the filling material's high cost.
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Effects of 1,2,3-Propanetricarboxylic acid on the hydration …
Aiming at the issues of poor hydration activity, long setting time, and low early strength in industrial by-product fluorogypsum (FG), 1,2,3-propenyltricarboxylic …
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