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2. Water–cement ratio - Wikipedia

   en.wikipedia.org/wiki/Water–cement_ratio

   A w/c ratio higher than 0.60 is not acceptable as fresh concrete becomes "soup" [2] and leads to a higher porosity and to very poor quality hardened concrete as publicly stated by Prof. Gustave Magnel (1889-1955, Ghent University, Belgium) during an official address to American building contractors at the occasion of one of his visits in the ...

3. 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]

4. Properties of concrete - Wikipedia

   en.wikipedia.org/wiki/Properties_of_concrete

   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. Concrete which is subjected to long-duration forces is prone to creep. The density of concrete varies, but is around 2,400 kilograms per cubic metre (150 lb/cu ft). [1]

5. Controlled low strength material - Wikipedia

   en.wikipedia.org/wiki/Controlled_low_strength...

   CLSM consists of a mixture of Portland cement, water, aggregate and sometimes fly ash.Unlike ordinary concrete, CLSM has much lower strength. The strength of CLSM is less than 1,200 pounds per square inch (8.3 MPa), while ordinary concrete has strengths exceeding 3,000 pounds per square inch (21 MPa) [citation needed].

6. Concrete mixer - Wikipedia

   en.wikipedia.org/wiki/Concrete_mixer

   A concrete mixer (also cement mixer) is a device that homogeneously combines cement, aggregate (e.g. sand or gravel), and water to form concrete. A typical concrete ...

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