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  2. Gypsum concrete - Wikipedia

    en.wikipedia.org/wiki/Gypsum_concrete

    US patent 4,444,925 lists the components of Gyp-Crete as atmospheric calcined gypsum, sand, water, and small amounts of various additives.Additives listed include polyvinyl alcohol, an extender such as sodium citrate or fly ash, a surfactant such as Colloid defoamer 1513 DD made by Colloids, Inc., and a fluidizer based on sodium or potassium derivatives of naphthalene sulfonate formaldehyde ...

  3. What's the Actual Difference Between Cement and Concrete? - AOL

    www.aol.com/whats-actual-difference-between...

    Appearance. Concrete has a more rocky texture, feel, appearance to it than pure cement does, Rudin says. Cement is more versatile: It can be made to feel glassy smooth or just as rocky as concrete.

  4. Concrete recycling - Wikipedia

    en.wikipedia.org/wiki/Concrete_recycling

    Concrete from a building being sent to a portable crusher. This is the first step in recycling concrete. Crushing concrete from an airfield. Concrete recycling is the use of rubble from demolished concrete structures.

  5. Properties of concrete - Wikipedia

    en.wikipedia.org/wiki/Properties_of_concrete

    The ultimate strength of concrete is influenced by the water-cementitious ratio (w/cm), the design constituents, and the mixing, placement and curing methods employed.All things being equal, concrete with a lower water-cement (cementitious) ratio makes a stronger concrete than that with a higher ratio. [2]

  6. Concrete - Wikipedia

    en.wikipedia.org/wiki/Concrete

    A single concrete block, as used for construction. 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

  7. Reinforced concrete - Wikipedia

    en.wikipedia.org/wiki/Reinforced_concrete

    Reinforced concrete, also called ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility.

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