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From Molten Calcium Aluminates through Phase Transitions to Cement Phases [PDF]

open access: yesAdvanced Science, 2020
Crystalline calcium aluminates are a critical setting agent in cement. To date, few have explored the microscopic and dynamic mechanism of the transitions from molten aluminate liquids, through the supercooled state to glassy and crystalline phases ...
Hao Liu   +12 more
doaj   +5 more sources

Synthesis of Calcium Aluminates from Non-Saline Aluminum Dross [PDF]

open access: yesMaterials, 2019
The present work examines the synthesis of tricalcium aluminate (for use as a synthetic slag) from the non-saline dross produced in the manufacture of metallic aluminum in holding furnaces.
Felix A Lopez   +2 more
exaly   +4 more sources

A polymer of calcium aluminate and water glass as cement substitute [PDF]

open access: yesScientific Reports
Calcium aluminate cement (CAC) is a suitable source of tetrahedral aluminum, which reacts with tetrahedral silicon from water glass (aqueous sodium or potassium silicate solution) in an exothermic reaction, forming inorganic polymer structures that are ...
Bernd Spangenberg, Jan D. Epping
doaj   +2 more sources

Solid reactions between CaO–Al2O3 and Si–Ti-containing steel at 1273 K

open access: yesJournal of Materials Research and Technology, 2022
Solid reactions between Si–Ti-containing steel and calcium aluminates with various CaO/Al2O3 ratios at 1273 K were studied. Particle precipitation zones (PPZs) were observed and analyzed for the composition and thickness. After heating at 1273 K for 10 h,
Yi Wang   +4 more
doaj   +1 more source

Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

open access: yesNanomaterials, 2021
Lanthanide-activated alkaline earth aluminate phosphors are excellent luminescent materials that are designed to overcome the limitations of conventional sulfide-based phosphors.
Doory Kim
doaj   +1 more source

Formation of Complex Inclusions in Gear Steels for Modification of Manganese Sulphide

open access: yesMetals, 2021
Suitable MnS inclusions in gear steel can significantly improve the steel machinability and reduce the manufacturing costs. Two gear steel samples with different sulphur contents were prepared via aluminium deoxidation followed by calcium treatment.
Haseeb Ahmad   +6 more
doaj   +1 more source

Development of safe products from local waste of oil and fat production [PDF]

open access: yesE3S Web of Conferences, 2023
Quicklime is a mixture of pieces of different sizes formed after coarse grinding of the fried product. According to its chemical composition, it is a mixture of calcium and magnesium oxides, the main composition of which is CaO.
Rakhmatova Dilnoza   +4 more
doaj   +1 more source

Alkali fusion of bauxite refining residue (red mud-RM) to produce low carbon cements

open access: yesSN Applied Sciences, 2023
This paper creates hydraulic binders using waste and a low energy input. Cements are produced with a bauxite refining residue (red mud-RM), blended with limestone and lime, and fused at temperatures from 600 to 1200 °C.
S. Pavia, R. Goodhue, O. Alelweet
doaj   +1 more source

Contact strength of C-S-H cement phase [PDF]

open access: yesE3S Web of Conferences, 2019
The object of the study was the cement phase C-S-H – X-ray amorphous calcium hydrosilicates, obtained by steaming at 80°C together limestone and silica at different molar ratios CaO/SiO2 = 0.5; 1.0; 1.5.
Ovcharenko Gennadiy   +3 more
doaj   +1 more source

Biocompatibility nanostructured biomaterials based on calcium aluminate [PDF]

open access: yesSrpski Arhiv za Celokupno Lekarstvo, 2018
Introduction/Objective. The aim of this paper was to verify the biocompatibility of the newly synthesized nanostructured material based on calcium aluminate after implantation into the subcutaneous tissue of rats. Methods. The study included 18 rats aged
Janković Ognjenka   +5 more
doaj   +1 more source

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