…In 1824, the British scientist J. Aspdin invented a method of mixing clay and limestone and baking them, which gave birth to modern cement, whose components could be adjusted. It is said that this cement was named Portland cement because the hardened cement resembled the color of stone mined in the Isle of Portland in the UK. Later, with the help of basic research by the British scientist IC Johnson, the foundations of modern Portland cement were laid in the mid-19th century. … *Some of the terminology that mentions "Portland cement" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…1824年にイギリスのアスプディンJ.Aspdinにより粘土と石灰石を混合して焼成する方法が発明され,成分調製が可能な近代的セメントが誕生した。このセメントの硬化したものがイギリスのポートランド島から産出される石材の色とよく似ていたためポルトランドセメントportland cementと命名されたといわれる。その後,イギリスのジョンソンI.C.Johnsonの基礎研究などもあって,19世紀半ばには現在のポルトランドセメントの基礎ができた。… ※「portland cement」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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