Where does this come from, and can I check it?

Joseph Aspdin burned limestone and clay together and named the powder after stone quarried on Portland. The figure is taken from Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a technology fact?

Yes. It sits on the Technology shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

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The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Portland cement was patented in 1824

Joseph Aspdin burned limestone and clay together and named the powder after stone quarried on Portland The name referred to Portland stone, a pale building limestone that the set cement was meant to resemble. Aspdin's early product was weaker than modern cement, and the harder burning that produces true Portland clinker came later in the century. Concrete made with it became the default structural material of the twentieth century. It sits in Mondo's technology collection, one of 200 facts that each trace back to the reference below.

Where this comes from

Britannica

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Tags: materials, cement, construction

Portland cement was patented in 1824: the short answers

Where does this come from, and can I check it?: Joseph Aspdin burned limestone and clay together and named the powder after stone quarried on Portland. The figure is taken from Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a technology fact?: Yes. It sits on the Technology shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.