Use of Qingchuan natural asphalt mining product in paving petroleum asphalt pavement

The invention discloses the application of Qingchuan natural asphalt product in paving petroleum asphalt road, which is characterized in that for the Qingchuan natural asphalt with melting point more than 280 DEG C, under the petroleum asphalt temperature of 160-180 DEG C for the road construction, the natural asphalt product fused as a modifier is required to have melting grain size not more than 18 mum. The preparation method comprises, primary crushing the exploited Qingchuan asphalt, then fine crushing into the required fine powder with the melting grain size not more than 18mum. The product is easy to mix and melt with the petroleum asphalt as the petroleum asphalt modifier. The modified effect for the road asphalt is good. The production process is simple and the operation is safe without environment pollution. The product quality is stable. The performance thereof already reaches or exceeds the imported North American natural asphalt, and the production cost is relative low, so the production of the in