Q:

What is the density of cement?

A:

Quick Answer

The density of cement can be anywhere from 62 to 81 pounds per cubic foot, depending on the type of cement. General purpose cement, for example, can have a density up to 81 pounds per cubic foot.

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Full Answer

There is another type of cement called builder's cement, which can have a density of anywhere from 62 to 78 pounds per cubic foot. Bulk density is not important for cement because, when thrown in water, the liquid fills in the spaces in between the particles where the air would normally be.

General purpose cement and builder's cement have different relative density ranges because they are fundamentally different kinds of cement. General purpose cement, also sometimes referred to as GP cement, is considered straight cement, made from cement clinker, gypsum and limestone. This type of cement is used in many different settings for construction of buildings and various other structures. Builder's cement, which is also sometimes referred to as general purpose blended cement, is different from regular general purpose cement because it contains a nominal mass of fly ash. This type of cement is known to maintain its strength for a longer period of time with improved workability and a lower carbon footprint.

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    From what is cement made?

    A:

    Cement is made from a controlled mixture of calcium, silicon, aluminum, iron and other ingredients, which are most commonly found in limestone, shells and chalk or marl, and are combined with shale, clay, slate, blast furnace slag, silica sand and iron ore. To create cement, these material are heated at a high temperature and form a rock-like substance that is then ground into a fine powder.

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    What are the properties of cement?

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    Cement is a fine, gray powder that is used as a construction binding material. When mixed with water, cement reacts chemically and becomes hard and strong. Cement is categorized as either hydraulic or nonhydraulic, depending on how it mixes with water.

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    What is the ratio to mix cement?

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    How long does cement take to dry?

    A:

    Cement dries in stages that take about 30 days to complete. It takes one to two days for cement to dry enough for people to walk on and five to seven days before people can drive on it.

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