Portland cement
noun
Port·land cement ˈpȯrt-lən(d)- 
variants or less commonly portland cement
: a cement (see cement entry 1 sense 1b) that sets under water and that is made by finely pulverizing the clinker produced by heating a mixture of clay and limestone or similar materials to a high temperature just short of fusing
Drexel engineers have found a way to improve upon ordinary Portland cement …, the glue that's bonded much of the world's construction since the late 1800s. 
Swiss National Science Foundation
Swiss National Science FoundationOnce the joints are open, refill them with a dry mix of stone dust and portland cement, mixed at a ratio of 1 part cement to 6 parts dust. This Old House
This Old House
Example Sentences
Recent Examples on the Web Mix a batch of mortar in a wheelbarrow [7] by combining portland cement, sand, and water, following the instructions on the cement bag. Joseph Truini, Popular Mechanics, 24 July 2021 The plant's primary product is portland cement, a product widely used by the construction industry to produce concrete across the country. Sarah Bowman, The Indianapolis Star, 5 June 2021 The very high temperatures required to drive the water out of limestone and transform it into portland cement also ensure the complete combustion of the rubber and fabric in tires. Mike Allen, Popular Mechanics, 9 Oct. 2018 Modern concrete swaps out the volcanic ash for portland cement. Amy Gamerman, WSJ, 9 Aug. 2018 Some estimates suggest the practice has the potential to lower emissions by as much as 40 to 80 percent compared with portland cement, White said. Chelsea Harvey, Scientific American, 9 July 2018 The tiles on the front facade are made from portland cement and rendered in a range of hues to give the surface a mottled look. Barbara Eldredge, Curbed, 15 Mar. 2018 See More
Joseph Truini, Popular Mechanics, 24 July 2021 The plant's primary product is portland cement, a product widely used by the construction industry to produce concrete across the country. Sarah Bowman, The Indianapolis Star, 5 June 2021 The very high temperatures required to drive the water out of limestone and transform it into portland cement also ensure the complete combustion of the rubber and fabric in tires. Mike Allen, Popular Mechanics, 9 Oct. 2018 Modern concrete swaps out the volcanic ash for portland cement. Amy Gamerman, WSJ, 9 Aug. 2018 Some estimates suggest the practice has the potential to lower emissions by as much as 40 to 80 percent compared with portland cement, White said. Chelsea Harvey, Scientific American, 9 July 2018 The tiles on the front facade are made from portland cement and rendered in a range of hues to give the surface a mottled look. Barbara Eldredge, Curbed, 15 Mar. 2018 See More Word History
Etymology
Isle of Portland, England; from its resemblance to a limestone found there
First Known Use
1824, in the meaning defined above