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 …
FLUOROGYPSUM can advantageously replace traditional cement as a binder for screed mortars. It is widely used in floor screen applications because of its numerous …
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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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 …
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 …
Effects of Fluorogypsum and Quicklime on Unconfined Compressive Strength of Kaolinite. J Jang, J Jang, M Barbato, MT Gutierrez-Wing, KA Rusch, J Jung. Journal of Coastal Research 114 (SI), 126-130, 2021. 3: ... Journal of the Korean Society of Hazard Mitigation 17 (6), 367-373, 2017. 1: 2017:
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. ...
Fluorogypsum, a waste product of hydrofluoric acid industry, has been blended with Ca (OH) (2) and chemical additives followed by fine grinding to give …
The mechanism of activator to fluorgypsum and the fluorine solidification were investigated by the performances of composite binding material. Through the setting time testing of fluorgypsum with NaOH, Na2SO4 and NaF, the least activator dosage were all 1%. And the cementitious material over 80% of fluorgypsum was processed to …
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 ...
In the background, a waste pile of fluorogypsum can be seen in the background. The off-white material is a waste byproduct of hydrogen fluoride production. ... alleged hazards, potential unsafe or ...
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 …
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.
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. …
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 …
Appl. Sci. 2023, 13, 12802 2 of 15 cement-based self-leveling mortars possess excellent mechanical properties, they are prone to shrinkage and cracking. On the other hand, gypsum-based self ...
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 ...
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 …
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 …
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
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.
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 …
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.
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 are annually produced in the U.S. However, data on the mechanical strength of clay–FG mixtures are unavailable. In this study, we conducted ...
Scrap tyres can have a large impact on the environment and the very large size of these tyres makes landfills impossible and uneconomical. This creates an unauthorised accumulation of these tyres in the open environment and an environmental hazard that can lead to the risk of widespread fires [1, 2].Many solid wastes are added …
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 …
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 ...
Fluoride toxicity is characterized by a variety of signs and symptoms. [1] . In the United States, poisoning most commonly follows ingestion (accidental or intentional) …
DOI: 10.1016/j.conbuildmat.2023.131069 Corpus ID: 257679255; Comparative study on modifications of pH-adjusted fluorogypsum by potassium carbonate and potassium bicarbonate @article{He2023ComparativeSO, title={Comparative study on modifications of pH-adjusted fluorogypsum by potassium carbonate and potassium …
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