At the same time, it is found that the admixing of the certain rock asphalt can efficiently enhance the performance of mixture.

同时还发现，掺加一定量的岩沥青，可以有效提高混合料的性能，建议在橡胶粒沥青混合料中掺加适量的岩沥青。

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It is pointed that with rock asphalt content increasing, its effectives wears off. When content increases from 20% to 25%, performance of mixture has little change.

研究认为，随着岩沥青掺量的增加，其对混合料路用性能的影响逐渐减弱，当掺量由20%增加到25%时，性能变化很小。

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The so-called big, generally refers to more than rock mineral content of 88% asphalt content.

含量大的含义，一般是指矿物含量超过岩沥青含量的88%。

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Nibbling at the edges of the asphalt, the river pressed the road against red cliffs so that at times the rock faces seemed to scrape the windows.

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