• Cementsome basic definitionsUnderstanding Cement

    Some basic definitions used in cement and concrete. A few useful basic definitions follow since the meanings of the words cement and concrete are rather blurred in general use. Portland Cement Material made by heating a mixture of limestone and clay in a kiln at about 1450 C then grinding to a fine powder with a small addition of gypsum

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  • What is effect of silica and alumina content on cement

    Silica and Alumina are two out of three main ingredients in cement and the general percentage is given below. The major ingredient of cement is Lime. Silica 17-25 Helps in maintaining the consistency and workability of concrete Sufficient qu

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  • Cement Hazards and Controls Health Risks and Precautions

    Corrosive bleed water from the concrete is absorbed by the worker s pants and held against the skin for prolonged periods. Without waterproof knee pads kneeling on wet concrete can irritate or burn the skin. Cement dust released during bag dumping or concrete cutting can also irritate the skin.

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  • How Does the Ratio of Sand to Cement Affect the Strength

    The way that concrete is mixed is very important in determining the quality of the final product after it is poured. The exact materials used and the proportion of those materials are both very important. Knowing what ratio of sand to cement to use depends partly on what the concrete is being used for.

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