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  2. Gypsum - Wikipedia

    en.wikipedia.org/wiki/Gypsum

    Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO 4 ·2H 2 O. [4] It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, drywall and blackboard or sidewalk chalk.

  3. Drywall - Wikipedia

    en.wikipedia.org/wiki/Drywall

    Drywall (also called plasterboard, dry lining, [1] wallboard, sheet rock, gib board, gypsum board, buster board, turtles board, slap board, custard board, gypsum panel and gyprock) is a panel made of calcium sulfate dihydrate , with or without additives, typically extruded between thick sheets of facer and backer paper, used in the construction ...

  4. Wall plug - Wikipedia

    en.wikipedia.org/wiki/Wall_plug

    [4] [6] Other varieties of wall plug are mechanical anchors for heavy duty loads and hollow wall fixings for fixing to plasterboard. The first mechanical anchor, the Rawlbolt, was designed in the 1930s by the Rawlplug company and the first fixing for hollow walls was the Toggle Bolt, which was also designed by Rawlplug in 1941.

  5. Gypsum block - Wikipedia

    en.wikipedia.org/wiki/Gypsum_block

    Gypsum is a mineral and non-combustible building material (a class A1 building material in accordance with the German DIN 4102, the European EN 13501 or the British BS 476 or the American ASTM E119) consisting of calcium sulphate dihydrate (CaSO 4 ·2H 2 O). Because of the stored water, gypsum is a good fire protection building material. In the ...

  6. First fix and second fix - Wikipedia

    en.wikipedia.org/wiki/First_fix_and_second_fix

    First fix and second fix are terms used in the UK and Irish housebuilding and commercial building construction industry.. First fix comprises all the work needed to take a building from foundation to putting plaster on the internal walls.

  7. Superhard material - Wikipedia

    en.wikipedia.org/wiki/Superhard_material

    If a material contains many delocalized bonds it is likely to be soft. [10] Somewhat related to hardness is another mechanical property fracture toughness, which is a material's ability to resist breakage from forceful impact (note that this concept is distinct from the notion of toughness). A superhard material is not necessarily "supertough".

  8. Nature's strongest material comes from sea snails - AOL

    www.aol.com/news/2015-02-18-natures-strongest...

    Limpet teeth have beaten out the previous record-holder for the strongest biological material found in nature: spider silk. Researchers found the limpets' teeth contain goethite, which is a hard ...

  9. Cement board - Wikipedia

    en.wikipedia.org/wiki/Cement_board

    Cement board is composed of aggregated Portland cement with a glass-fiber mesh on the surfaces. This 5 ⁄ 16 inch (7.9 mm) thick cement board is designed as an underlayment for tile floors.

  1. Related searches strongest plasterboard fixings material crossword clue 4 letters daily

    strongest plasterboard fixings material crossword clue 4 letters daily puzzle