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john55
john55
Student
College - Freshman

What is "Portland cement"? What is its composition?

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Posted by john55 on Monday October 6, 2008 at 6:16 AM and tagged with chemistry, portland cement.

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  1. lit24
    lit24 Teacher
    Doctorate

    eNotes Editor

    Portland cement is manufactured by burning a mix of calcium carbonate (limestone or chalk) and an aluminosilicate(clay or shale) and then grinding the product with approximately 5% gypsum to produce cement.

    It is called "Portland Cement" because it is similar to Portland Stone  which was quarried on the Isle of Portland in Dorset, England.

    The term was first coined by Joseph Aspdin in 1824.

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    Posted by lit24 on Monday October 6, 2008 at 7:52 AM