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The formation of calcium sulfoaluminate hydrate …

The formation of ettringite (3CaO · Al 2 O 3 · 3CaSO 4 · 32H 2 O) and monosulfate (3CaO · Al 2 O 3 · CaSO 4 · 12H 2 O) from tricalcium aluminate (3CaO · Al 2 O 3) and gypsum …

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SCPA – Southeast Cement Promotion Association

SCPA – Southeast Cement Promotion Association

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Early age hydration of calcium sulfoaluminate (synthetic …

Suspensions of synthetic ye'elimite (C 4 A 3 S ¯) in a saturated gypsum (C S ¯ H 2) and calcium hydroxide (CH) solution were examined in-situ in a wet cell by soft X-ray …

Mechanism of expansion associated with ettringite …

On the other hand, ettringite for- mation under restraint can be utilized to develop compressive stresses of either low magnitude in shrinkage-compensating concretes, or of high …

Impact of zeta potential of early cement hydration phases on

For superplasticizer effectiveness, adsorption on early cement hydration products such as ettringite ([Ca 6 Al 2 (OH) 12](SO 4) 3 ·26H 2 O) = AF t), monosulfate ([Ca 4 Al 2 (OH) …

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Mechanism of sulfate attack on portland cement concrete — …

Types of Ettringite Although several types of ettringite crystals are known on the basis of differences in the crystal habit and size, the internal structure corresponds to only one …

شرکت موقوفه دانش سلامت کوثر

According to the official endowment letter No. 198455, Danesh Salamat Kowsar Co., on 06/17/2012, has dedicated all its one hundred shares and capitals to: 50% endowment to Shahid Rajaei Hospital in Shiraz, 25% endowment to …

The Treatment of polluted Mine Water

The ettringite slurry from stage 3 is decomposed to rege­ nerate the aluminium hydroxide for recycle. This is done by expo­ sing the ettringite to a pH that is outside its region of stability. …

Ettringite

Ettringite is a hydrous calcium aluminum sulfate mineral first described in 1874 from Ettringer Bellerberg, Germany. The mineral was named after its place of discovery. Properties of …

Studies on the carboaluminate formation in limestone filler …

Monosulfoaluminate can be formed before ettringite when gypsum is not able to rapidly supply enough sulfate ions to a reactive C 3 A [16]. When hydration progresses, …

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The International Centre for Diffraction Data

PDF Databases – The Best Just Got Better! More data, higher quality, more content, many types of solid state reference data. The world's largest solid-state database …

ICDD Database Search

Powder Diffraction File TM (PDF ®) Search Use the Powder Diffraction File TM (PDF ®) Search to find the ICDD database product best suited to your needs by searching with a chemical name, …

Sulfate removal from wastewater using ettringite precipitation

One of the main challenges in industrial wastewater treatment and recovery is the removal of sulfate, which usually coexists with Ca 2+ and Mg 2+.The effect of Mg 2+ on sulfate …