Straight asphalt

Japanese: straight asphalt(英語表記)straightasphalt
Straight asphalt

…The latter is obtained as a residue in the oil refining process by either vacuum distilling crude oil or extracting it with a solvent such as propane. When this straight asphalt is heated to about 250°C and air is blown into it, blown asphalt, which has a high softening temperature and is highly elastic and impact resistant, is obtained. The main use of asphalt is for road paving, and straight asphalt is the main material used. …

*Some of the terminology that mentions "straight asphalt" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…後者は,石油精製工程において,原油を減圧蒸留するか,あるいはプロパンなどを溶剤とする抽出を行うか,いずれかの方法で残渣分として得られる。このストレートアスファルトstraight asphaltを約250℃に加熱して空気を吹き込むと,軟化温度が高く,弾性や衝撃抵抗の大きいブローンアスファルトblown asphaltが得られる。アスファルトの大きな用途は道路舗装用であり,主としてストレートアスファルトがあてられる。…

※「straight asphalt」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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