Composition
There are many types of concrete available, created by varying the proportions of the main ingredients below. In this way or by substitution for the cemetitious and aggregate phases, the finished product can be tailored to its application with varying strength, density, or chemical and thermal resistance properties.
Recently the use of recycled materials as concrete ingredients has been gaining popularity because of increasingly stringent environmental legislation. The most conspicuous of these is fly ash, a by-product of coal-fired power plants. This use reduces the amount of quarrying and landfill space required as the ash acts as a cement replacement thus reducing the amount of cement required.
The mix design depends on the type of structure being built, how the concrete will be mixed and delivered and how it will be placed to form this structure.
Read more about this topic: Concrete
Famous quotes containing the word composition:
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—Anthony Trollope (1815–1882)
“The proposed Constitution ... is, in strictness, neither a national nor a federal constitution; but a composition of both.”
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—Derek Gjertsen, British scientist, author. Science and Philosophy: Past and Present, ch. 3, Penguin (1989)