To counter the feature of overlaying in thin layer , this paper introduces the choice of asphalt mixture gradation used in the covering of pavement of Shi-An Espressway.
针对薄层罩面的特点 ，介绍了石安高速公路罩面沥青混合料级配的选择方法。
2
In the process, construction companies are draining wetlands and covering formerly vegetated soils with asphalt, concrete and housing materials.