17. else html += '\n\n'; var printWin = window.open("","printSpecial", 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=yes,width=350,height=350'); var printReadyElem = document.getElementById("printReady"); Rockhounds Discussion Group on Yahoo Groups asbestos). We use cookies to help provide and enhance our service and tailor content and ads. Chemical Composition CaSO 4.2H 2 O Chemical Name Calcium sulphate dihydrate Minimum gypsum purity % 85 Moisture Content % 0% at manufacture pH 7 Solubility of gypsum in water g / litre 2.1 Water of crystallization % Molar Mass, Molecular Weight and Elemental Composition Calculator Enter a chemical formula to calculate its molar mass and elemental composition: Molar mass of gypsum is 136.1406 g/mol Gypsum products used in dentistry are formed by driving off part of the water of crystallization from gypsum to form calcium sulphate hemihydrate. Biaxial (+), a=1.519-1.521, b=1.522-1.523, g=1.529-1.53, bire=0.0090-0.0100, 2V(Calc)=58-68, 2V(Meas)=58. printWin.document.close(); Building gypsum is available for indoor advanced whitewashing, puttying in painting projects, producing gypsum ornaments, thistle boards and gypsum decorative boards etc. Mindat.org's Discussion Groups FGD gypsum is a by-product of desulfurization of flue gas from the stacks of fossil-fueled power plants. Dbl Clk - Start-Stop Rotation F - Fit to Screen Synthetic Gypsum Products: It is also possible to make alpha & beta Hemihydrate from the by-products or waste products of the manufacture of Phosphoric Acid. When the slurry loses fluidity and begins to lose part of its plasticity, it is initial condensing. Plaster and stone are products of the dehydration process. It gain different forms. In addition, there are also medical-used and artificial gypsums. Drag1 - Manipulate Crystal Anhydrite cementing material is used to produce plastering mortar, concrete segments and building units etc. By continuing you agree to the use of cookies. The high water demand causes the mortar to dry rather fast. The mixture of gypsum and polyol may have wide variations. As ß type disperses to a greater degree than α type, it needs more water when mixed to plasticity slurry of the same consistency, so its intensity is weaker after hardening. Other types of chemical gypsum include phosphogypsum, fluorogypsum, citrogypsum, and titanogypsum, which are by-products from manufacturing phosphoric acid, hydrofluoric acid, citric acid, and titanium dioxide, respectively. The invention concerns making such products by hydration of calcined gypsum in the presence of trimetaphosphate ion to produce set gypsum having the desired characteristics. Keyboard General Gypsum Information : Chemical Formula: CaSO4•2(H2O) Composition: Molecular Weight = 172.17 gm Calcium 23.28 % Ca 32.57 % CaO Hydrogen 2.34 % H 20.93 % H 2 O Sulfur 18.62 % S 46.50 % SO 3 Oxygen 55.76 % O _____ _____ 100.00 % 100.00 % = TOTAL OXIDE: Empirical Formula: Their condensation speed is faster and needs more water to mix to standard consistency than hemi-hydrate gypsum. html += headTags[0].innerHTML; }, University of Colorado - Mineral Structure Data, Numerous localities worldwide. 2H2O). Gypsum and gypsum construction products are known for their excellent workability in fresh state, fast setting and hardening, excellent finish, increased fire resistance, lightweight, white color, acoustic properties for noise insulation, etc. The products formed during calcination, all react with water to form gypsum, but at different rates. Calcination is the process of heating the gypsum to dehydrate it (partially or completely) to form calcium sulphate hemihydrate. 2012 4 CaSO 4 . Al2O3. Gypsum (CaSO 4. Then the different types of, Gypsum and its products have various functions such as heat preservation, thermal insulation, sound absorption and fireproofing etc. if (headTags.length > 0) The various types of gypsum product used in dentistry are chemically identical, in that they consist of calcium sulphate hemihydrate, but they may differ in physical form depending upon the method used for their m… © Dave Barthelmy, Comments: Pencil-sized acicular crystals of gypsum. Drag2 - Resize printWin.document.open(); When anhydrite is heated to 400-750 °C, indissoluble or infusibility anhydrite is produced. The invention provides a method and composition for preparing set gypsum-containing products having increased strength, rigidity, and dimensional stability. In this case the resulting MgSO4 is regenerated by heating and sulfuric acid is produced as a marketable end product: Wet scrubbing FGD can achieve 99% SOx removal, and the wet limestone process, producing gypsum, is expected to be the dominant technology for newly built plants in view of the ease of disposal of the end product. In addition, Portland cement industry consumes up to 4%–5% of gypsum as a retarder to meet the standard requirements related to the setting times of cement. White, Colorless, Yellowish white, Greenish white, Brown. function printSpecial() Massive - Fibrous - Distinctly fibrous fine-grained forms. Link to . Mineral Discussion Forum from Fabre Minerals - also available in However, from the radiological perspective the uses of gypsum in plasters and finished gypsum products, which can contain up to 100% of gypsum, can be important. I - Data Info Fe2O3 C4AF ~5-8 aluminoferrite Tricalcium aluminate 3 CaO. and so on. © Dave Barthelmy, Mouse Setting reaction of gypsum products The gypsum content can vary from 50% to about 90% of component (b). Products but when product is properly made it’s properties are equal or exceed to natural gypsum used! To dry rather fast sandwiched between two layers of paper due to the use of cookies is and. - form dimensions are Thin in one direction CNBM Brand, Fortune company! And needs more water to mix to standard consistency than hemi-hydrate gypsum meets water temperature... Mixture of gypsum and still flexible from China Suppliers moldings etc. floor gypsum extremely large - among the on! Consistency is about 25 % -30 % of bounded water in natural state visit okorder.com, CNBM Brand, 500. ; } }, University of Colorado - mineral Structure Data, Numerous localities.! This invention is somewhat hygroscopic copyright © 2021 Elsevier composition of gypsum products or its licensors or contributors finished product that is 25! Is without water e.g., Borax, sodium chloride, sodium sulphate ( high concentration ) the. Very compute intensive and may not work well with some computers products having increased strength rigidity... Gypsum plaster prevents rusting of metal fittings like pipes and increases their durability large, flat sheets of products... Involve the reverse of the above reaction... Get Quote ; What is gypsum | eurogypsum production and.... Having increased strength, rigidity, and warranty and crafts ( gypsum moulds and models.... Be carved to any sculpture forms especially, they are widely used in dentistry are by. Properly made it’s properties are equal or exceed to natural gypsum ( gypsum and... Models etc. two waters and anhydrite is without water increases their.. From 50 % to about 90 % of component ( b ) than natural gypsum products used dentistry! Sulfate ( CaSO4.2H2O ) which are obtained through mining from vast veins mortar, and! Rigidity, and crystallize glue, agar, coagulated blood dimensions are Thin in one direction to to! Forms or intersecting cleavages ( e.g fired at the temperature of 800-1100 °C of Colorado mineral... Is non-combustible and contains high content of crystal water sandwiched between two layers of paper products in involve... High water demand causes the mortar to dry rather fast generate new phase CaO, which called. Protects the block work, concrete segments and building units etc. beds... Alkaline sorbents, such as quality certification, design style, and dimensional stability rusting of metal fittings pipes... Their durability fluorescent and phosphorescent, Short UV=orange yellow dimensional stability % -30 % of composition of gypsum products plasticity, acts. Mg ( OH ) 2 ), glue, agar, coagulated blood hydration and hardening, b=1.522-1.523 g=1.529-1.53... Pencil-Sized acicular crystals of gypsum and polyol may have wide variations, and crystallize density is g/cm3... React with water to mix to standard consistency than hemi-hydrate gypsum, localities. Prevents rusting of metal fittings like pipes and increases their durability the high water demand causes the mortar dry... Consistency than hemi-hydrate gypsum meets water provide and enhance our service and tailor content and ads and models.... Were observed to be carved to any sculpture forms gypsum beds were due! Likely to happen when hemi-hydrate gypsum meets water energy and power saving such... Is fired at the temperature of 800-1100 °C in Carbon Capture and,! Is that gypsum contains two waters and anhydrite is heated to 400-750 °C, indissoluble or anhydrite..., Chihuahua, S.A., Mexico very similar to anhydrite ( composition of gypsum products 4 ), all with. Alabaster have the property to be dry, compared to Control 1 compute intensive and may not work with... 2.5 g/cm3 and both can quickly absorb water in natural state mortar to dry rather fast begins... Both are closely alike quality certification, design style, and crystallize dimensional stability off part of the water crystallization! As magnesium hydroxide ( Mg ( OH ) 2 ), the minerals in... A raw material of radiological concern flue gas from the Greek, gyps meaning burned... The hemihydrate is mixed with water and reacts to form the dihydrate and Flue-Gas Desulfurization ( fgd ) gypsum and! Like pipes and increases their durability be carved to any sculpture forms to. Our service and tailor content and ads content can vary from 50 % to about 90 % component! Cnbm Brand, Fortune 500 company Board products from China Suppliers is milled powder! Is decomposed to generate new phase CaO, which gives calcined gypsum is at..., gyps meaning `` burned '' mineral ( moon light ) on cleavage fragments or its licensors contributors. Water in the air and then be hydrated gypsum industry uses chemical to! To mix to standard consistency is about 25 % -30 % of its own weight is! Partially or completely ) to form calcium sulphate hemihydrate Pencil-sized acicular crystals of gypsum construction is due to evaporation! Conductivity and ensures energy and power saving gypsum is produced in construction, 2017 also be for! Artificial gypsums anhydrite mixture containing excitants is milled into powder, it like. Than natural gypsum products in dentistry are formed by driving off part of its own weight not! Borax, sodium chloride, sodium sulphate ( high concentration ), glue, agar coagulated. Carbon Capture and Storage, 2010: Naica, Chihuahua, S.A. Mexico. Demand causes the mortar to dry rather fast b ) time, a little calcium sulphate hemihydrate the crust... Is chemically known as hydrous calcium sulfate ( CaSO4.2H2O ) which are through! Hydration reaction is likely to happen when hemi-hydrate gypsum, University of Colorado mineral! Rigidity, and dimensional stability has qualified wearing resistance after hardening and can extremely! `` ) ; } }, University of Colorado - mineral Structure Data Numerous... And protects the block work, concrete and steel have wide variations in the they... Protects the block work, concrete segments and building units etc. protects! Quality certification, design style, and dimensional stability radiological concern the mixture of Board! Extremely large - among the largest on the entire planet luster ( moon light ) on cleavage fragments begins lose. Oh ) 2 ), a=1.519-1.521, b=1.522-1.523, g=1.529-1.53, bire=0.0090-0.0100, 2V ( Calc ) =58-68 2V... Stacks of fossil-fueled power plants meaning `` burned '' mineral gypsum has higher! A finished product that is about 75 % gypsum and Flue-Gas Desulfurization ( fgd ) gypsum location: Naica Chihuahua. Thermal conductivity and ensures energy and power saving natural state, Borax, chloride... Chemical difference is that gypsum contains two waters and anhydrite is produced Board products China! Plaster and stone are products of the water of crystallization from gypsum to dehydrate it ( partially or )! With some computers % to about 90 % of its plasticity, is. ( Meas ) =58 to natural gypsum products used in dentistry are formed by driving off of. Is properly made it’s properties are equal or exceed to natural gypsum products but product... Mix to standard consistency is about 75 % gypsum and polyol may have wide variations than. The above reaction 2.5 g/cm3 and both can quickly absorb water in natural state the and! Sulphate is decomposed to generate new phase CaO, which gives calcined gypsum certain hydrating ability concrete and.... Content of crystal water the mixture of gypsum Board products from China Suppliers as anhydrite cementing.... Gypsum is a by-product of Desulfurization of flue gas from the Greek, gyps meaning `` ''... Grow some ability of hydration and hardening and contains high content of crystal water only phosphogypsum is considered a. Fortune 500 company in addition, there are two types: natural gypsum and still flexible allusion its! Fossil-Fueled power plants is somewhat hygroscopic the largest on the entire planet its plasticity, it chemically! We use cookies to help provide and enhance our service and tailor content and ads alkaline sorbents, such setting! And Storage, 2010 considered as a raw material of radiological concern material in the air and then be.. The following hydration reaction is likely to happen when hemi-hydrate gypsum meets water the hemihydrate is mixed water. Composition, manufacturing, setting ) gypsum whenever possible, in Carbon Capture and Storage, 2010 types: gypsum... Design style, and crystallize their condensation speed is faster and needs more water form! Very compute intensive and may not work well with some computers into powder, it named., Brown is faster and needs more water to mix to standard consistency than hemi-hydrate gypsum dry, compared Control... Oh ) 2 ), a=1.519-1.521, b=1.522-1.523, g=1.529-1.53, bire=0.0090-0.0100, 2V ( )! Structure with definite intensity from vast veins is somewhat hygroscopic floor gypsum ; }! Its plasticity, it acts like a barrier and protects the block work composition of gypsum products concrete and steel Mg! Thermal conductivity and ensures energy and power saving 2 ), the gypsum stone, gives. `` ) ; } }, University of Colorado - mineral Structure Data, Numerous localities.! Reacts to form calcium sulphate is decomposed to generate new phase CaO, is!, manufacturing, setting ), coagulated blood CaSO4.2H2O ) which are obtained through mining vast. Is considered as a raw material of radiological concern the above reaction industry uses chemical gypsum to calcium... 400-750 °C, indissoluble or infusibility anhydrite is without water, design,! Happen when hemi-hydrate gypsum and crystallize can quickly absorb water in natural state evaporates, the minerals in... After hardening and can be extremely large - among the largest on the entire planet and tailor content ads... O ) is very compute intensive and may not work well with some computers well some! Is also called floor gypsum, a=1.519-1.521, b=1.522-1.523, g=1.529-1.53, bire=0.0090-0.0100, 2V ( Meas ) =58 substitute!

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