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Related to Portland cement: White Portland cement
Portland cementor portland cement
A hydraulic cement made by heating a limestone and clay mixture in a kiln and pulverizing the resulting material.
[After Portland, an urban district of southern England.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Building) a cement that hardens under water and is made by heating a slurry of clay and crushed chalk or limestone to clinker in a kiln
[C19: named after the Isle of Portland, because its colour resembles that of the stone quarried there]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a type of hydraulic cement usu. made by burning a mixture of limestone and clay in a kiln.
[1815–25; after the Isle of Portland, Dorsetshire, England]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||Portland cement - a cement that hardens under water; made by heating limestone and clay in a kiln and pulverizing the result|
cement - a building material that is a powder made of a mixture of calcined limestone and clay; used with water and sand or gravel to make concrete and mortar
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