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  2. Concrete - Wikipedia

    en.wikipedia.org/wiki/Concrete

    Concrete is a composite material composed of aggregate bonded together with a fluid cement that cures to a solid over time. Concrete is the second-most-used substance in the world after water, [1] and is the most widely used building material. [2] Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined.

  3. Sodium silicate - Wikipedia

    en.wikipedia.org/wiki/Sodium_silicate

    In industry, the various grades of sodium silicate are characterized by their SiO 2 :Na 2 O weight ratio (which can be converted to molar ratio by multiplication with 1.032). The ratio can vary between 1:2 and 3.75:1. [1] Grades with ratio below 2.85:1 are termed alkaline. Those with a higher SiO 2 :Na 2 O ratio are described as neutral.

  4. European Green Deal - Wikipedia

    en.wikipedia.org/wiki/European_Green_Deal

    The European Green Deal, approved in 2020, is a set of policy initiatives by the European Commission with the overarching aim of making the European Union (EU) climate neutral in 2050. [1] [2] The plan is to review each existing law on its climate merits, and also introduce new legislation on the circular economy, building renovation ...

  5. Dextrin - Wikipedia

    en.wikipedia.org/wiki/Dextrin

    a crispness enhancer for food processing, in food batters, coatings, and glazes, ( INS number 1400) a textile finishing and coating agent to increase weight and stiffness of textile fabrics. a thickening and binding agent in pharmaceuticals and paper coatings. a pyrotechnic binder and fuel; this is added to fireworks and sparklers, allowing ...

  6. Urea-formaldehyde - Wikipedia

    en.wikipedia.org/wiki/Urea-formaldehyde

    Urea-formaldehyde ( UF ), also known as urea-methanal, so named for its common synthesis pathway and overall structure, [1] is a nontransparent thermosetting resin or polymer. It is produced from urea and formaldehyde. These resins are used in adhesives, plywood, particle board, medium-density fibreboard (MDF), and molded objects.

  7. Properties of concrete - Wikipedia

    en.wikipedia.org/wiki/Properties_of_concrete

    The elasticity of concrete is relatively constant at low stress levels but starts decreasing at higher stress levels as matrix cracking develops. Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension.

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