| 摘要 |
An improved asphalt mix and a process for making the same are proposed. The asphalt mix includes new aggregate and new asphalt, which are mixed together at a high temperature so that the asphalt covers the surfaces of the new aggregate. The mix further includes recycled aggregate obtained from crushing recycled asphalt concrete at an ambient temperature to such an extent that each aggregate grain will retain some asphalt on its surface. The recycled aggregate at an ambient temperature is mixed with the new aggregate covered with the new asphalt to form an asphalt composition, and to lower the overall asphalt composition temperature to, at the maximum, approximately 100° C. To the asphalt composition thus formed, additive oil is mixed to complete the asphalt mix. The additive oil has a low vapor pressure so as to be practically nonvolatile and has mutual solubility with asphalt. Thus, when the asphalt composition is mixed with the additive oil, the asphalt on the surfaces of both new and recycled aggregate swells by absorbing the oil. When the asphalt mix is cooled to ambient temperatures, because the asphalt remains swollen at these temperatures, the asphalt mix does not congeal together and, thus, may be stored intact for a long time. However, when the mix is firmly compacted at ambient temperatures, the swollen asphalt on the aggregate surfaces amalgamates together to form a solid block or a pavement instantly after the compaction.
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