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unbound granular materials are usually stone, or concrete, or slate. cement-bound materials come in multiple types. mass concrete is ...


, or simply aggregate, is a broad category of coarse- to medium-grained particulate material used in construction, including sand, gravel, stone, , recycled concrete and geosynthetic aggregates.aggregates are the most mined materials in the world. aggregates are a component of composite materials such as concrete and asphalt concrete; the aggregate serves as ...

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concrete is a composite material composed of fine and coarse aggregate bonded together with ... other cementitious materials, such as fly ash and cement, are sometimes added—either pre-blended with the cement or directly as a concrete ... sand, natural gravel, and stone are used mainly for this purpose.

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ferrochrome, or ferrochromium (fecr) is a type of ferroalloy, that is, an alloy of chromium and ... in the furnace hearth, the tap hole is drilled open and a stream of molten metal and rushes down a trough into a chill or ladle. ferrochrome solidifies in large castings which are for sale or further processed.

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