History
- Magnesia cement uses in masonry construction is ancient. It was used primarily as a mortar component and stabilizer for soil bricks. Magnesia has also been identified in the Great Wall of China and other ancient landmarks. Roman cement is reported to have contained high levels of Magnesia.
- In the West, Portland cement has replaced Magnesia for masonry uses. However, New York City’s Brooklyn Bridge base is made from locally mined cement, a mixture of calcium oxide and magnesia cement commonly called Rosendale Natural Cement, the only natural non-fired cement made in the US.
- Magnesia cement boards were approved for construction use in the US around 2003.
- Due to its fire resistance and safety ratings, New York and New Jersey were early adopters of Magnesia cement board. Florida has adopted Magnesia boards for mold/mildew resistance. It is hurricane and impact tested and approved in Miami-Dade County.
- Located in Taipei, Taiwan, Magnesia board can be found on all 101 stories of Taipei 101, currently the second tallest building in the world. Magnesia sheeting was used on the inside and outside of all the walls, fireproofing beams and as the sub-floor sheathing.
Read more about this topic: Magnesium Oxide Wallboard
Famous quotes containing the word history:
“Modern Western thought will pass into history and be incorporated in it, will have its influence and its place, just as our body will pass into the composition of grass, of sheep, of cutlets, and of men. We do not like that kind of immortality, but what is to be done about it?”
—Alexander Herzen (1812–1870)
“History does nothing; it does not possess immense riches, it does not fight battles. It is men, real, living, who do all this.... It is not “history” which uses men as a means of achieving—as if it were an individual person—its own ends. History is nothing but the activity of men in pursuit of their ends.”
—Karl Marx (1818–1883)
“... that there is no other way,
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—John Ashbery (b. 1927)