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2. Abrams' law - Wikipedia

   en.wikipedia.org/wiki/Abrams'_law

   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 ...

3. Ready-mix concrete - Wikipedia

   en.wikipedia.org/wiki/Ready-mix_concrete

   In the UK, ready-mixed concrete is specified either informally, by constituent weight or volume (1-2-4 or 1-3-6 being common mixes) or using the formal specification standards of the European standard EN 206+ A1, which is supplemented in the UK by BS 8500. This allows the customer to specify what the concrete has to be able to withstand in ...

4. Water–cement ratio - Wikipedia

   en.wikipedia.org/wiki/Water–cement_ratio

   Water–cement ratio. The water–cement ratio ( w/c ratio, or water-to-cement ratio, sometimes also called the Water-Cement Factor, f) is the ratio of the mass of water ( w) to the mass of cement ( c) used in a concrete mix: The typical values of this ratio f = w⁄c are generally comprised in the interval 0.40 and 0.60.

5. Creep and shrinkage of concrete - Wikipedia

   en.wikipedia.org/.../Creep_and_shrinkage_of_concrete

   The paste has a porosity of about 0.4 to 0.55 and an enormous specific surface area, roughly 500 m 2 /cm 3. Its main component is the tri-calcium silicate hydrate gel (3 CaO · 2 SiO 3 · 3 H 2 O, in short C 3 S 2 H 3). The gel forms particles of colloidal dimensions, weakly bound by van der Waals forces.

6. 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]

7. Compressive strength - Wikipedia

   en.wikipedia.org/wiki/Compressive_strength

   As per Indian codes, compressive strength of concrete is defined as: Field cured concrete in cubic steel molds (Greece) The compressive strength of concrete is given in terms of the characteristic compressive strength of 150 mm size cubes tested after 28 days (fck). In field, compressive strength tests are also conducted at interim duration i.e ...