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effects of different calcium compounds on thethe use of calcium aluminate solutions in the

Current Location : Home > effects of different calcium compounds on thethe use of calcium aluminate solutions in the

  • CALCIUM Overview Uses Side Effects Precautions

     · Calcium carbonate is taken by mouth as an antacid for indigestion (dyspepsia). Calcium carbonate and calcium acetate are also taken by mouth to reduce phosphate levels in

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  • Sodium Gluconate as Complexing Agent in Volumetric

     · Chemical mechanisms and kinetic modeling of calcium aluminate cements hydration in diluted systems Role of aluminium hydroxide formation. Organic compounds in the processing of lateritic bauxites to alumina Part 2 Effects of organics in the Bayer process. Quantitative analysis in alkaline aluminate solutions by Raman spectroscopy

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  • Effect of calcium formate as an accelerator on the

     ·  article osti_ title = Effect of calcium formate as an accelerator on the physicochemical and mechanical properties of pozzolanic cement pastes author = Heikal Mohamed abstractNote = The aim of the present work is to study the effect of calcium formate (CF) as an accelerator on the properties of pozzolanic cement pastes. . Three types of cements were used in this

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  • Effect of calcium formate as an accelerator on the

     ·  article osti_ title = Effect of calcium formate as an accelerator on the physicochemical and mechanical properties of pozzolanic cement pastes author = Heikal Mohamed abstractNote = The aim of the present work is to study the effect of calcium formate (CF) as an accelerator on the properties of pozzolanic cement pastes. . Three types of cements were used in this

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  • Calcium phosphate Ca3(PO4)2PubChem

    Calcium Phosphate is the calcium salt of phosphoric acid with widely used applications. This agent can be used as a countermeasure for exposure to strontium and radium radionuclides. Upon oral uptake calcium phosphate competes for and blocks the absorption of radium (Ra-226) and strontium in the gastrointestinal (GI) tract.

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  • Calcium Chloride Solution AMERICAN ELEMENTS

    The calcium atom has a radius of 197 pm and a Van der Waals radius of 231 pm. Calcium was discovered and first isolated by Sir Humphrey Davy in 1808. It is the fifth most abundant element in the earth s crust and can be found in minerals such as dolomite gypsum plagioclases amphiboles pyroxenes and garnets.

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  • Influence of calcium aluminate cement (CAC) on alkaline

     · In this paper the effect of calcium aluminate cement (CAC) additions on the alkali activation of red clay brick waste (RCBW) was studied at room temperature and at 65 ºC. RCBW was partially replaced with CAC (0 to 50 wt. ) and blends were activated with NaOH and sodium silicate solutions.

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  • calcium aluminate matrixCORE

     · retainer but the use of other alternative binders is receiving growing attention. For instance the use of calcium aluminate cement (CAC) to safely encapsulate hazardous materials has been recognized to be highly effective (Navarro-Blasco et al. 2013). The relatively low pH of this kind of cement matrix (10.5-11.5) in

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  • Solidification/stabilization of toxic metals in calcium

     · phases or OPC modified by calcium aluminate calcium sulphate and/or admixtures 1-7 occasionally forming new phases with the metallic cations. In addition G. Qian and co-workers have extensively studied the S/S processes of toxic metals in fly ash-calcium sulfoaluminate cement Friedel s salt or fly ashes 8-10 .

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  • The Role of Calcium in the Human Bodyhealthpedian

    Significance

    Bioactive calcium phosphate materials and applications in

     · Calcium phosphates are minerals composed of calcium cations and phosphate anions. They are known as the major inorganic material in approximately 60 of all native human bones (Table 1).The existence of calcium phosphates in bones was first discovered in 1769 and in the 1800s calcium phosphates that exist in bones were subdivided into different

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  • Calcium carbonateEssential Chemical Industry

     · Calcium carbonate. Three types of calcium carbonate-containing rock are excavated and used by industry. They are limestone chalk and dolomite. Limestone and chalk are both forms of calcium carbonate and dolomite is a mixture of calcium and magnesium carbonates. All have impurities such as clay but some rocks are over 97 pure.

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  • 4.2 Calcium the Archetypal Alkaline Earth Metal

     · However in order to understand the effects of calcium carbide it is important to realize the state of the art of lighting in the late 18 th century. It was in 1792 that William Murdoch (Figure (PageIndex 4 ).15) first began experimenting with the use of gas derived from the heating of coal and other materials for lighting.

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  • Use of Boron Compounds as Grinding Aids with Alcohol

     · Milling aids have been predominantly developed to increase the performance or grinding capacity of cement products and alcohol amines have been used as grinding aids in cement grinding processes for many years. Moreover the setting point of cement produced with grinding aids is most often changed. In this study the effects of alkanolamines and boron compounds in different mixing

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  • Calcium compounds Article about Calcium compounds by

    There are several kinds of kidney stones which makes it very important to analyze the stones after getting them out of the body in order to determine the best way to prevent their re-formation in the future.Most kidney stones are composed of calcium compounds.This could be due to many reasons such as excessive calcium intake for a long period of time hypervitaminosis D (excess vitamin D

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  • CALCIUM Overview Uses Side Effects Precautions

     · Calcium is a mineral that is an essential part of bones and teeth.The heart nerves and blood-clotting systems also need calcium to work. Calcium-rich

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  • Effect of calcium formate as an accelerator on the

     ·  article osti_ title = Effect of calcium formate as an accelerator on the physicochemical and mechanical properties of pozzolanic cement pastes author = Heikal Mohamed abstractNote = The aim of the present work is to study the effect of calcium formate (CF) as an accelerator on the properties of pozzolanic cement pastes. . Three types of cements were used in this

    Get Price
  • Mineral Transition and Chemical Reactivity Evolution of a

     · The mineral formation–transition mechanism microstructure evolution crystal structure pulverization property and chemical reactivity of the CaO–Al2O3–SiO2 clinker with MgO and Na2SO4 dopants during the sintering process at 1300 °C for 2.0 h were systematically studied using CaO Al2O3 SiO2 MgO and Na2SO4 as raw materials when the molar ratio of CaO to Al2O3 is 1.4 the mass ratio

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  • Molecular and submolecular scale effects of comb

     · The samples were alite embedded in epoxy resin and having received a flat mirror polish. They were exposed to solutions of different concentrations of calcium hydroxide ranging from 0 to 20 mmol L −1 and regulated at 20°C ± 1.5°C in the presence or not of comb-copolymers. Varying concentration of calcium and hydroxide provides a useful

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  • Sulphate attack in Concrete Its Effects Causes and

     · Magnesium sulfate attacks calcium silicate hydrate as well as calcium hydroxide and calcium aluminate hydrate. The consequences of sulfate attack include not only disruptive expansion and cracking but also loss of strength of concrete due to the loss of cohesion in the hydrated cement paste and of adhesion between it and the aggregate particles.

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  • Sodium Gluconate as Complexing Agent in Volumetric

     · Chemical mechanisms and kinetic modeling of calcium aluminate cements hydration in diluted systems Role of aluminium hydroxide formation. Organic compounds in the processing of lateritic bauxites to alumina Part 2 Effects of organics in the Bayer process. Quantitative analysis in alkaline aluminate solutions by Raman spectroscopy

    Get Price
  • Effects of sodium and calcium sulphates on volume

     · These hydroxides are then combined with Ca 2 ions and form calcium silicate (C-S-H) or calcium aluminate hydrates (C-A-H) which causes the soil particles to bind together resulting in increased strength (see "Lime-stabilized kaolinite" section) and soil volume stability. However the presence of sulphate ions can interfere with these reactions and cause interactions that result in high

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  • Composition of Calcium Carbonate Polymorphs Precipitated

     · The precipitation of calcium carbonate (CaCO3) from saturated solutions prepared using calcium chloride and sodium hydrogen carbonate under the influence of ultrasound (20 kHz intensity ranging from 1.5−18.5 W cm−2) has been studied. For short reaction times or treatment at low intensity precipitates containing up to 90 vaterite were recovered longer (>30 min) times or higher

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  • Effect of calcium aluminate cement on geopolymer concrete

     · Geopolymer incorporating calcium aluminate cement can cure at ambient conditions. • CAC replacement ratio significantly affects the strength development of geopolymer. • Taguchi method can be used to develop optimised geopolymer mixture. • Geopolymer concrete with CAC has reasonably good mechanical properties.

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  • Composition of Calcium Carbonate Polymorphs Precipitated

     · The precipitation of calcium carbonate (CaCO3) from saturated solutions prepared using calcium chloride and sodium hydrogen carbonate under the influence of ultrasound (20 kHz intensity ranging from 1.5−18.5 W cm−2) has been studied. For short reaction times or treatment at low intensity precipitates containing up to 90 vaterite were recovered longer (>30 min) times or higher

    Get Price
  • Molecular and submolecular scale effects of comb

     · The samples were alite embedded in epoxy resin and having received a flat mirror polish. They were exposed to solutions of different concentrations of calcium hydroxide ranging from 0 to 20 mmol L −1 and regulated at 20°C ± 1.5°C in the presence or not of comb-copolymers. Varying concentration of calcium and hydroxide provides a useful

    Get Price
  • Effect of calcium formate as an accelerator on the

     ·  article osti_ title = Effect of calcium formate as an accelerator on the physicochemical and mechanical properties of pozzolanic cement pastes author = Heikal Mohamed abstractNote = The aim of the present work is to study the effect of calcium formate (CF) as an accelerator on the properties of pozzolanic cement pastes. . Three types of cements were used in this

    Get Price
  • The Role of Calcium in the Human Bodyhealthpedian

    Calcium is a mineral and so it cannot be produced by the body. Therefore consuming adequate levels of calcium is crucial. The body needs a constant supply of calcium from diet to keep bones growing and strong. Bone remodelling is an ongoing process in which bone is broken down and calcium is deposited to replace the bone material that is lost.

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  • Molecular and submolecular scale effects of comb

     · The samples were alite embedded in epoxy resin and having received a flat mirror polish. They were exposed to solutions of different concentrations of calcium hydroxide ranging from 0 to 20 mmol L −1 and regulated at 20°C ± 1.5°C in the presence or not of comb-copolymers. Varying concentration of calcium and hydroxide provides a useful

    Get Price
  • Influence of calcium compounds on the mechanical

     · Calcium compound addition is likely to result in precipitation of calcium silicate hydrate or calcium silicate aluminate hydrate phases and at the same time improve the dissolution of the fly ash in the alkaline medium and subsequently the geopolymerisation reaction.

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