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  2. Water–cement ratio - Wikipedia

    en.wikipedia.org/wiki/Watercement_ratio

    A good concrete must be therefore prepared with as little water as possible, but with enough water to hydrate the cement minerals and to properly handle it. A lower ratio leads to higher strength and durability , but may make the mix more difficult to work with and form.

  3. Calcium silicate hydrate - Wikipedia

    en.wikipedia.org/wiki/Calcium_silicate_hydrate

    When water is added to cement, each of the compounds undergoes hydration and contributes to the final state of the concrete. [2] 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.

  4. 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

  5. Abrams' law - Wikipedia

    en.wikipedia.org/wiki/Abrams'_law

    Abrams' law (also called Abrams' water-cement ratio law) [1] is a concept in civil engineering. The law states the strength of a concrete mix is inversely related to the mass ratio of water to cement. [1] [2] As the water content increases, the strength of concrete decreases. Abrams’ law is a special case of a general rule formulated ...

  6. Cement - Wikipedia

    en.wikipedia.org/wiki/Cement

    Cement powder in a bag, ready to be mixed with aggregates and water. [1] Cement block construction examples from the Multiplex Manufacturing Company of Toledo, Ohio, in 1905. A cement is a binder, a chemical substance used for construction that sets, hardens, and adheres to other materials to bind them together.

  7. Portland cement - Wikipedia

    en.wikipedia.org/wiki/Portland_cement

    Concrete is a composite material consisting of aggregate (gravel and sand), cement, and water. As a construction material, concrete can be cast in almost any shape desired, and once hardened, can become a structural (load bearing) element. Concrete can be used in the construction of structural elements like panels, beams, and street furniture ...

  8. Making cement is very damaging for the climate. One ... - AOL

    www.aol.com/news/making-cement-very-damaging...

    Cement makes up 10-15% of concrete by volume, but accounts for 88% of concrete’s considerable emissions. Other ingredients in concrete are sand, gravel, crushed stone and water.

  9. Roman concrete - Wikipedia

    en.wikipedia.org/wiki/Roman_concrete

    Roman concrete, like any concrete, consists of an aggregate and hydraulic mortar, a binder mixed with water that hardens over time. The composition of the aggregate varied, and included pieces of rock, ceramic tile, lime clasts, and brick rubble from the remains of previously demolished buildings.