ʻO ka Asphalt kahi wai olaola ʻeleʻele loa me ka ʻili ʻeleʻele a hiki ke hoʻoheheʻe ʻia i ka carbon disulfide (he wai gula-melemele, ʻala ʻala). Loaʻa pinepine lākou ma ke ʻano o ka asphalt a i ʻole ka tar.
Hiki ke hoʻokaʻawale nui ʻia ka asphalt i ʻekolu mau ʻano: pitch tar pitch, petroleum asphalt a me asphalt maoli: i waena o lākou, ʻo ka coal tar pitch kahi huahana o ka coking. ʻO ka Petroleum asphalt ke koena ma hope o ka hoʻomaʻemaʻe ʻana i ka ʻaila ʻaila. Mālama ʻia ka asphalt kūlohelohe ma lalo o ka lepo, a ʻo kekahi ʻano waiho ʻana i nā minerala a hōʻiliʻili paha ma luna o ka ʻili o ka honua.
Loaʻa ʻia ka bitumen ma ke ʻano o ka asphalt ma ka hoʻomaʻemaʻe ʻana i ka aila maʻemaʻe ma o ka hoʻokaʻawale ʻana. He mau wahi hoʻolapalapa ko lākou i loko o ka ʻaila ʻaila a he mau mea kaumaha i loko o ka ʻaila ʻaila, no laila e ʻike ʻia lākou ma lalo o nā hale kiaʻi.
Loaʻa ka asphalt ma ke ʻano o ka tar ma ka mālama ʻana i nā mea organik (ka nui o ka lanahu) ma o ka carbonization.
Hoʻohana pinepine ʻia ka asphalt i ke kūkulu ʻana, e like me ka paving alanui. Ua kapa ʻia nā alanui i paʻa ʻia me ka asphalt a me ka ʻiliʻili.