Because of different maturity and hydrocarbon expulsion, the correlation of every organic content in carbonate rock is not very clear, only bitumen "a" has a poor positive bearing on bitumen "c".
由于成熟度、排烃条件等的影响，碳酸盐岩中各种有机质含量的相关关系不明显，仅沥青a和沥青c有比较差的正相关关系。
The specified minimum VMA can assure not only the enough bitumen content, but also the stability of mixture.
规范规定的最小VMA不仅要能保证足够的沥青用量，还要能保证沥青混合料的稳定性。
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