| 摘要 |
<p>PCT No. PCT/FI91/00221 Sec. 371 Date Feb. 19, 1993 Sec. 102(e) Date Feb. 19, 1993 PCT Filed Jul. 18, 1991 PCT Pub. No. WO92/01751 PCT Pub. Date Feb. 6, 1992.The object of the invention is a method of processing an asphalt mixture which comprises mineral aggregate and/or recycled crushed asphalt and to which bitumen-based binding material has optionally been added, the method comprising heating of mineral aggregate or a mixture of mineral aggregate and crushed asphalt or crushed asphalt as such before mixing the possible preheated bitumen-based binding material with the mixture. In the method according to the invention the mineral aggregate or crushed asphalt or a mixture thereof that has been disposed in hoppers (9) is heated by leading a heated gas that contains vapour, preferably superheated water vapour, thereto, the gas being preferably a dry mixed gas (water gas) of a combustion gas of fuel, such as thin oil, and water vapour.</p> |
