Definition of Portland cement in US English:

Portland cement

(also portland cement)


  • Cement that is manufactured from limestone and clay and that hardens under water.

    • ‘For the concrete, the architects specified fly ash to replace 50 percent of the more typical Portland cement, which requires a great deal of energy to produce and gives off a lot of carbon-dioxide during its manufacture.’
    • ‘Similarly, the Portland Cement Association governs and researches this primary active component of concrete: the white dusty powder called Portland cement.’
    • ‘Expanded polystyrene mixed with Portland cement, sand, and chemical additives are the most common group of ingredients.’
    • ‘About 80% of Australian councils that are involved in stabilisation of road pavements use Portland cement as the major chemical additive.’
    • ‘The three products tested were calso (calcium flakes), Portland cement and asphalt emulsion, in proportions varying from 1 to 2 per cent.’
    • ‘Concrete is a moistened mixture of three dry ingredients: Portland cement, sand and crushed stone, in roughly a 1-24 blend.’
    • ‘In fact, it contains no Portland cement at all; nor does it contain water.’
    • ‘Generally you can use a time-tested Portland cement plaster (1 part Portland cement, 1 part lime, and 4 parts fine sand) for a base coat.’
    • ‘Before the invention of Portland cement, lime mortar was used where the work was to be exposed to the weather, and clay mortar was used for the interior part of chimneys.’
    • ‘Stucco is a siding material made of Portland cement, sand, lime and water.’
    • ‘The concrete contains 50 percent fly ash in the cement to reduce the use of carbon-dioxide-producing Portland cement.’
    • ‘The final properties of the cured concrete are dependent on many different factors, but the two most important factors are the ratio of Portland cement to water and the relative dry amounts of each of the constituent components.’
    • ‘Gypsum has many commercial uses: as a retarder in Portland cement, as a filler in paper, textiles, and paints, in the manufacture of sulphuric acid and fertilizers, and in the production of plaster of Paris.’
    • ‘Traditionally, plaster is a mixture of Portland cement, sand and water that is applied in layers to a base of wood or metal lath or perforated plasterboard.’
    • ‘Portland cement consumption improved 3.3 percent in June, although year-to-date consumption is down 1.0 percent.’
    • ‘This is a two-part product, consisting of Portland cement mixed with fine sand along with a liquid latex binder, typically packaged together in a bucket, which can double as your mixing pail.’
    • ‘An earlier letter to Nature showed that so-called columns on a site about two miles from the stones were made of Portland cement.’
    • ‘It states that the main products exported were manufactured goods, refined copper, cobalt, precious stones, cotton yarn and Portland cement.’
    • ‘In areas where moisture and earthquakes are a problem, rammed-earth builders often use a mix of sand and Portland cement, although the results lack the visual appeal of raw earth walls.’
    • ‘I mixed one shovel of Portland cement to five shovels of sand, filled the whole area with this mix, tamped it, and then sprinkled it with water.’


1810s: named after the Isle of Portland in Dorset, England, a limestone peninsula quarried for its fine building stone.


Portland cement

/ˈpɔːrtlənd səˈmɛnt/