We would appreciate you contacting us at least 24 hours in advance of the scheduled meeting so that arrangements can be made to locate the requested auxiliary aid. Gold bond brand fireshield gypsum board 09 29 00 manufacturer national gypsum company 2001 rexford road charlotte, nc 28211 704 3657300 technical information. Face layer 58 fireshield ul v438 gypsum board vertically applied with 158 type s screws 12 o. Po box, gypsum, colorado 81637, or by calling 970 5247514 during business hours. This mineral can be, somewhat, scratched with your fingernail. Gypsum has been used as a building material for a long time, possibly since the neolithic. Use for casting capitals, statues, moldings, medallions, and reliefs. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboardsidewalk chalk, and drywall. Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula caso 4 2h 2 o. The use of gypsum to improve soil conditions scottish.
Takeoff quantities1 if required 10m2 per 25kg bag 10m2 per. The systems in this manual utilize gypsum products to provide fire. The gypsum construction handbook or any of the chapters may be downloaded and viewed in pdf format. When mixed with water, 11 pounds yields approximately 1 gallon of casting plaster that sets in about 2025 minutes. Ul v484 base layer 5 8 soundbreak xp gypsum board vertically applied to 358 steel ral tl07168 60 ul u411 studs spaced 24 o. Sepa published an end of waste policy position for gypsum from waste plasterboard in 2010. Board or stasmooth surface preparation of interior walls and ceilings. Jun 09, 2010 dfb gypsum industries is the leading manufacturer of gypsum board range of products.
This dual role of gypsum is discussed in the feature. Application to gypsum detection on mars barbara lafuente1, sara king2, lori fenton2, janice l. Gypsum is used to stabilise dispersive soils on dam embankments so that both surface erosion and potential tunnelling and piping failures are reduced. In a number of buildings recently constructed at our navy yards gypsum slabs have been used for the roof decks because of their light weight and noiicondensing quality.
As acicular to stubby prismatic crystals, thin to thick tabular on 010, typically exhibiting 010, 011, 110, 111, 103, with more than 20 other forms noted, coarsely striated k 001, to 17 m. The town was named for nearby gypsum deposits, and was incorporated in 1911 geography. When you convert calcined gypsum and water into gypsum dihidrate, needleshaped crystals are formed and the gypsum solidifies. Adobe acrobat reader is required to view pdf files. It is a pigment, and was found in tutankhamuns paintbox. Thistle multifinish or thistle board finish to provide a plaster skim finish. Gypsum is the set retarder for ordinary portland cement opc. This gypsum panel provides a durable building material that is also easy to repair. Gypsum is a home rule municipality in eagle county, colorado, united states. Describes complete line of construction products, including sheetrock brand gypsum panels and imperial brand gypsum base for drywall and veneer plaster construction, sheathing and ceilings.
Comparison of these characteristics allows the user to be more accurate in meeting design and code requirements. The face paper folds around the long edges to reinforce and protect the core, and the. Receive your complimentary electronic issue by signing up, below. If gypsum soaked during setting, water fills pores and increases volume its recommended to separate the cast from impression after 1 hour. It is softer than most minerals, with a value of 2 on the mohs scale of mineral hardness. Gypsum products are considered as hazardous materials by the national board of gypsum. The data provided are especially useful to builders, architects, code officials, fire service, and insurance personnel. A notforprofit trade association founded in 1930, promoting the use of gypsum while advancing the development, growth, and general welfare of the gypsum industry in the united states and canada on behalf of its member companies. Dfb gypsum industries is the leading manufacturer of gypsum board range of products.
These products are kept in special polythene packs and containers which are taken away by the authorities. Gypsum board and associated finishing products 11 life cycle analysis of gypsum board and associated finishing. Gypsum board this guide specification has been prepared by american gypsum, in printed and electronic media, as an aid to specifiers in preparing written construction documents for various gypsum based products including. Gypsum simple english wikipedia, the free encyclopedia. Besides being abundant, gypsum is easily refined into a powder for plaster or. A fort with no gypsum can use splints as an alternative. Gypsum1 reproduces fine details and gives a hard, chip resistant, smooth surface. If processed gypsum has been fully recovered in compliance with the sepa policy position, the subsequent movement and use in plasterboard manufacturing, cement manufacturing, or as a soil conditioner is not be subject to the requirements of waste legislation. Gypsum blocks are composed of gypsum, plaster, water and in some cases additives like vegetable or wood fiber for greater strength. Application of gypsum led to a quite significant increase in concentrations. Gypsum association, ga216, application and finishing of gypsum panel products gypsum association, ga238, guidelines for prevention of mold growth on gypsum board national gypsum company, ngc construction guide 1. Design information is quickly and easily determined.
Piping or tunnelling occur through a dam wall or embankment when water seeps along a line of weakness ie crack in dry clay. Downs1, briony horgan4, gabriel garcia2 1university of arizona, tucson, az 2carl sagan center, seti institute, mountain view, ca 3nasa ames research center. A massive finegrained white or lightly tinted variety of gypsum, called alabaster, has been used for sculpture by many cultures including. Work alongside projects influencers with a digital offer 8 architect engineering consultant building industry professional artisan. Amber blue quartz coal diamond emerald gypsum obsidian quartz rose quartz ruby sapphire sulfur turquoise ores cinnabar copper ore dvarium ore gold ore honey comb hydrogenium ore irilium ore iron ore seridium ore silver ore tin ore titanium ore wolframite.
Apr 04, 2020 a mineral consisting of hydrated calcium sulphate. New york, in fact, is the largest producer, yielding 500,000 tons annually, or one fifth of the countrys total. To share your opinion with our readers, you may send in your inputs in about 1500 words via e. Mineralogical characterization by xrd of gypsum dunes at. Winter deicing salt is toxic to most plants and grasses when it accumulates to certain levels.
The full version of the gypsum construction handbook. The bonding of paper and gypsum uses the mechanism that this needlelike crystal digests into the fiber of the paper and integrates it. Incluye datos sobre pruebas acusticas, fisicas y contra fuego. Features 100% recycled naturalfinish face paper on its front and back sides. The manufacturing process is automated at production plants where raw gypsum caso 4 2h 2 o is ground and dried, then heated to remove threequarters of the bound water and thus transformed into calcium sulfate hemihydrate caso 4. Gypsum caso4 2h2o c 20012005 mineral data publishing, version 1 crystal data. Gypwall fixing and finishing products classic 222 5 firewall gyproc firestrip for sealing deflection heads. The face paper is folded around the long edges to reinforce and protect the core, and the ends are squarecut and. Ul u465 5 8 soundbreak xp gypsum board vertically applied to one side of 358 ral tl07389 54 ul v438steel studs 24 o.
Gypsum is a common sulfate mineral made of calcium sulfate. H 2 o, also known as gypsum plaster, stucco, calcined gypsum or plaster of paris. Other uses of gypsum in time of war may be mentioned briefly. Disposal of gypsum products the finer particles of gypsum when inhaled can cause respiratory problems. Gypsum dust is a powdery deposit crystal size range between 1530jl located on the walls and ceiling ofthefirst 300500 m ofparks ranch cave, close lo lhe entrance. Gypsumation provides essential gypsum board information to aec professionals, contractors, and code officials twice annually. Pharos is a tool to help scientists, researchers, and product innovators identify problematic chemicals and collaborate to find safer alternatives. Mineralogical characterization by xrd of gypsum dunes at white sands national monument. Jones, editor, walls and ceilings, timelife books, isbn, page. The conducted research indicated that retention capacities of deposits, which become increased after the use of gypsum, will decrease over time e. Its been designed in an exceptionally basic way in fact it is only soon after i finished reading this pdf by which actually altered me, modify the way i really believe.
Specified values per astm c96, tested in accordance with astm c473. Features 100% recycled naturalfinish face paper on. Tests for initial setting, and final setting times loss of gloss test for initial setting time. Will take decoration after proper surface preparation of interior walls and ceilings. Bishop2,3, philippe sarrazin2, david blake3, robert t. Gypsum can also contain small clusters of selenite, satinspar, and alabaster, which can also be made into plaster powder, as well as anhydrite. Without gypsum, ground clinker exhibits flash setting in a few minutes, due to the rapid hydration of calcium aluminates to form calcium aluminate hydrate cah. We specialize in manufacturing and supplying gypsum based products to the building construction sector, which. Description installation recommendations national gypsum.
Route 6 passes through the center of town, leading east upriver 7 miles 11 km to eagle, the county seat. We specialize in manufacturing and supplying gypsum based products to. Avoid installation practices that might allow condensation to form behind boards. Gypsum dissolves in water, and so such crystals, which take a long time to grow, only happen in. The gypsum association fire resistance design manualis. The gypsum association fire resistance design manual is referenced by the following code and standards writing organizations. For all uses, when possible mix gypsum into the soil and water until gypsum dissolves. Jones, editor, walls and ceilings, timelife books, isbn, page 7. Set retarder and strength accelerator these columns of icj offer an opportunity to the engineering fraternity to express their views on the current practices in design, construction and management being followed in the industry. Gypsum 1 reproduces fine details and gives a hard, chip resistant, smooth surface. Gypsum board and associated finishing products 11 life cycle analysis of gypsum board and associated finishing products 1. Gypsum block is a massive lightweight building material composed of solid gypsum, for building and erecting lightweight, fireresistant, nonload bearing interior walls, partition walls, cavity walls, skin walls, and pillar casing indoors.
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