Aggregate gradation of pavement mixture is one of the important parts of the engineering design, it can affect the quality and the cost of the project.

路面混合料矿料级配组成设计是工程设计的重要组成部分，直接影响工程质量和工程造价。

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Besides optimum aggregate grading, bituminous binder's rheological property play a key role in the pavement performance.

除了优化混合料级配外，沥青胶结料的流变特性对这一路用性能也起着关键作用。

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Unbound aggregate base can efficiently retard the reflexion of cracks to asphalt pavement surface, which is aroused by the shrinkage crack of semi-rigid base in the inverted structure.

半刚性基层沥青路面作为过渡层时，可以有效改善半刚性基层收缩裂缝的反射裂缝的发生。

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