水泥混凝土路面是一种具有强度高、耐久性好、使用寿命长等特点的高级路面。但由于水泥用量大,造价较高,因此,一般情况下,这种高级路面在采用上受到限制。我省50年代在公路上修筑的水泥混凝土路面,多属过水路面及穿越城镇的路段,标准低,数量少,质量也差,但随着国民经济的迅速发展,干线公路交通量日益增长,原有砂石 Cement concrete pavement is a kind of high-grade pavement with high strength, good durability and long service life. However, due to the large amount of cement, high cost, therefore, under normal circumstances, the use of such high-level road surface is limited. The cement concrete pavement built on the highway in the 1950s in our province mostly belongs to the sections with passing waterways and crossing the cities and towns with low standard, small quantity and poor quality. However, with the rapid development of the national economy, the traffic volume of trunk roads is increasing day by day. The original gravel