— Students aged between 10 and 15 years old died when their vehicle was washed away in a wadi in the Niyabat of Samad of Mudhaibi province, eastern part of …
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— The LF NMR analysis revealed that the addition of KH 2 PO 4 and fluorogypsum enhanced and accelerated pore evolution and facilitated the hydration process of aluminate cementpared with pure aluminate cement slurry, the porosity was decreased by 21% in the mix containing only 10 wt% fluorogypsum, and the porosity …
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fluorogypsum composite binder L A Anikanova1, O V Volkova1, A I Kudyakov1, V A Lotov1, E Danilova2,3 and I A Kurzina2 1Tomsk State University of Architecture and Building, 2, Solyanaya Sq., 634003,
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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 (XRD), …
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Imports In 2022, Oman imported $559k in Gypsum, becoming the 130th largest importer of Gypsum in the world. At the same year, Gypsum was the 854th most imported product in Oman. Oman imports Gypsum primarily from: United Arab Emirates ($270k), Turkey ($228k), Saudi Arabia ($45.7k), South Korea ($4.18k), and India ($4.11k).
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— The Portland cement used in all cementitious mixes was a combination of 75 wt.% of clinker with 5 wt.% of gypsum and 20 wt.% of CaCO 3. Fig. 1 presents the XRD pattern of (a) clinker and (b) Portland cement, while Table 1 presents the average chemical composition of the main clinker phases obtained through Rietveld Refinement [19] of the …
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— The plant life in Oman has evolved to withstand high temperatures, low rainfall, and other challenging environmental conditions. Here's an overview of some …
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— 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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Fluorogypsum is a by-product of hydrofluoric acid produced by Honeywell in Geismar along La. 30. Pisolite and red mud are by-products from the refinement of bauxite ore into alumina, a material that is turned into aluminum. Pisolite, which was sold by the old Kaiser Aluminum plant in Gramercy in the late 1980s, is stored in large dry stacks ...
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— 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 ...
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— The optimal proportion of blending content among fluorogypsum, fly ash and cement of fly ash-fluorogypsum-cement composite binder (FFC binder) was known through the study.
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Download Table | Chemical composition of fluorogypsum from publication: Formulation of Sulphate Resistant Super Sulphated Cement Using Fluorogypsum and Granulated Blast Furnace Slag | Present ...
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— 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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— 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 …
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— Deployment to Iraq, Kuwait, Saudi Arabia, Bahrain, Gulf of Aden, Gulf of Oman, Oman, Qatar, the United Arab Emirates, and Afghanistan exposed service members to a number of airborne hazards, including oil-well fire smoke, emissions from open burn pits, dust and sand suspended in the air, and exhaust from diesel vehicles.
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Boswellia Sacra (frankincense tree), Dragon Blood trees, or Baobabs are some of the most unexpected species. In the northern mountains, we find quite a lot of Arabian foxes, …
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— 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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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 components. …
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— Fluorogypsum (FG), an acidic by-product (pH = 2.3) generated by the industrial manufacturing of hydrofluoric acid (Chesner et al. 1998), is commonly stockpiled after addition of alkali materials ...
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— Fluorogypsum, fly ash, Portland cement, and alum were blended. The mixture was ground in a ball mill to a fineness similar to that of Portland cement. The mortars were mixed by machine for 3 min, cast into 40 × 40 × 160 mm moulds for the strength test or 40 × 40 × 140 mm moulds with 4-mm diameter steel limiting frame for the volume variance ...
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— 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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— Oman's flora is diverse and well-adapted to the country's arid and varied landscapes, which include deserts, mountains, coastal areas, and wadis (seasonal riverbeds). The plant life in Oman has evolved to withstand high temperatures, low rainfall, and other challenging environmental conditions. Here's an overview of some …
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— 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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— For the purpose of comparison with the results presented in Bigdeli et al. [16], it is noted here that: (1) the FA and PC used for this research and in Bigdeli et al. [16] were the same; (2) the FG used here was slurry FG which was dried and ground before the addition of CFBCA, whereas the FG used in Bigdeli et al. [16] was U-FG; and (3) the …
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DOI: 10.1016/j.cscm.2020.e00471 Corpus ID: 230572878; Synergistic effects of rubber-tire-powder and fluorogypsum in cement-based composite @article{RodrguezR2021SynergisticEO, title={Synergistic effects of rubber-tire-powder and fluorogypsum in cement-based composite}, author={Sandra L. Rodr{'i}guez R. and O. …
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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 ...
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— The hydration process, mortar microstructure, and properties of the binder consisting of fly ash, fluorogypsum, and Portland cement were investigated with X-ray diffraction, differential thermal analysis, scanning electron microscopy with energy dispersing spectrum, and mercury intrusion porosimetry.Its major hydrates are hydraulic …
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Muscat: Ten key challenges faced by Oman's labour market that need to be addressed to help the country see optimal economic development have been released by the Ministry of Labour. The findings ...
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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 physi …
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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 also …
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— The mixture composition of composite binders prepared by blending the beneficiated ground fluorogypsum with granulated blast furnace slag (Fineness 400 m 2 /kg (Blaine), Portland cement and activators in different proportions followed by inter-grinding in a ball mill to a fineness of 410 m 2 /kg (Blaine) are given in Table 4.The composite …
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— Coastal areas and coastal communities are facing threats due to the impacts of climate change. Therefore, assessing their vulnerabilities and the potential for natural habitats to contribute to protecting coastal areas and communities is essential for effective long-term planning, sustainability, and resilient coastal management. This study …
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The sample of fluorogypsum was collected from M/s Navin Fluorine International, Bhestan, Gujarat, India. It was analyzed for chemical composition as per IS: 1288 10 and as per standard test procedures cited by Scott, et.al. 11-12.The fluorogypsum contained Fluoride 1.32%, SiO 2 + insoluble in HCl 0.65%, Al 2 O 3 + Fe 2 O 3 0.65%, CaO 41.19%, MgO …
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— This study focuses on the effect of Na 2 SO 4 and NaNO 2 on the modification of fluorogypsum, and the performance of the modified fluorogypsum in construction applications was assessed by evaluating its setting time, mechanical …
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A family of by-product gypsum materials-such as flue gas desul furization (FGD) gypsum, phosphogypsum (PG), fluorogypsum, titanogypsum, and disulfogypsum-is produced as …
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