…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 |
A form or designation of law that was widely used...
…Buddhist makeup was further perfected as a disti...
...The monumental building that coined the term &...
… [Takahiro Matsui]. … *Some of the terminology t...
A platform for parliamentary reform proposed by mi...
The name refers to the Roman Empire, a great west...
A small island located in the southwest of Kumamot...
...It is a bar with a stage and a dance hall for ...
...Infection occurs mainly through the oral inges...
…Even today, the naming of newborn babies is done...
...Therefore, it is easy to understand why housew...
… counselor: The chief secretary in an embassy, ...
This refers to businesses that require permission...
The absolute being that comes into existence as a ...
…It is handed down in Plutarch's Life of Lycu...