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  2. Calcium silicate - Wikipedia

    en.wikipedia.org/wiki/Calcium_silicate

    Calcium-silicate passive fire protection board being clad around steel structure in order to achieve a fire-resistance rating. Calcium silicate is commonly used as a safe alternative to asbestos for high-temperature insulation materials. Industrial-grade piping and equipment insulation is often fabricated from calcium silicate.

  3. Vermiculite - Wikipedia

    en.wikipedia.org/wiki/Vermiculite

    Exfoliated vermiculite is added to a calcium silicate slurry. This is then dewatered by pressing or by using one of the Fourdriner/Magnani/Hatschek processes to form a flat board which is then heat cured under pressure (typically 10–15 bar) for periods of up to 24 hours.

  4. List of thermal conductivities - Wikipedia

    en.wikipedia.org/wiki/List_of_thermal_conductivities

    Calcium silicate board (600 kg/m3) 0.17 Expanded polystyrene 0.030 −0.038 Plywood (950 kg/m3) 0.16 Rock mineral wool 0.034 −0.042 List [50] Wallboard, see Wallboard. 1960s Values Dry Zero − Kapok between burlap or paper density 0.016 g cm −3, TC=0.035 W⋅m −1 K −1 Hair Felt − Felted cattle hair density 0.176 g cm −3, TC=0.037 W ...

  5. Brick - Wikipedia

    en.wikipedia.org/wiki/Brick

    Calcium-silicate bricks are also called sandlime or flintlime bricks, depending on their ingredients. Rather than being made with clay they are made with lime binding the silicate material. The raw materials for calcium-silicate bricks include lime mixed in a proportion of about 1 to 10 with sand, quartz , crushed flint , or crushed siliceous ...

  6. Calcium silicate hydrate - Wikipedia

    en.wikipedia.org/wiki/Calcium_silicate_hydrate

    Only calcium silicates contribute to the strength. Tricalcium silicate is responsible for most of the early strength (first 7 days). [3] Dicalcium silicate, which reacts more slowly, only contributes to late strength. Calcium silicate hydrate (also shown as C-S-H) is a result of the reaction between the silicate phases of Portland cement and water.

  7. Thaumasite - Wikipedia

    en.wikipedia.org/wiki/Thaumasite

    Thaumasite is a calcium silicate mineral, containing Si atoms in unusual octahedral configuration, with chemical formula Ca 3 Si(OH) 6 (C O 3)(SO 4)·12H 2 O, also sometimes more simply written as CaSiO 3 ·CaCO 3 ·CaSO 4 ·15H 2 O. It occurs as colorless to white prismatic hexagonal crystals, typically as acicular radiating groups. It also ...

  8. Cement chemist notation - Wikipedia

    en.wikipedia.org/wiki/Cement_chemist_notation

    0.6–2.0 CaO · SiO 2 · 0.9–2.5 H 2 O, with variable composition within this range, and often also incorporating partial substitution of Al for Si: Calcium silicate hydrate: C-A-H: Phase more complex than C-S-H: Calcium aluminate hydrate C-A-S-H: This is even more complex than C-S-H and C-A-H: Calcium aluminate silicate hydrate AFt

  9. Sulfate attack in concrete and mortar - Wikipedia

    en.wikipedia.org/wiki/Sulfate_attack_in_concrete...

    Alteration of hardened cement paste composition, with monosulfate aluminates phase converting to ettringite and, in later stages, gypsum formation. The necessary additional calcium is provided by the calcium hydroxide and calcium silicate hydrate in the cement paste; The effect of these changes is an overall loss of concrete strength.