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级配砾石路面是以砾石(河光石)为骨材,以粘土为结合料,按一定的比例配合搅拌,摊铺在土路床上,或其他结构层上,经碾压后成一层坚固的铺砌层。这种路面在经济上最便宜,在使用上能达到平正坚硬的要求,如果养护得当,在一般交通量不太大的道路上,可保一年四季顺利通车。在郊区,采用这种路面更为适宜,因为这种路面的形变模量能达到600～800公斤/平方公分,其一般厚度为8～10公分(最厚也有到15公分的),每平方公尺造价仅1.2～2元。
Graded gravel pavement is gravel (river light stone) as the aggregate, clay as the binder, according to a certain proportion with mixing, paving in the dirt road bed, or other structural layer, after rolling into a solid layer of paving . This kind of road is the cheapest in terms of economy, and can meet the requirements of being just and hard in use. If the road is properly maintained, traffic can be opened smoothly throughout the year on roads where traffic volume is generally not too large. In the suburbs, the use of such pavement is more appropriate, because the deformation modulus of this road can reach 600 to 800 kg / cm 2, its general thickness of 8 to 10 cm (the thickest to 15 cm), square meters Foot cost only 1.2 ~ 2 yuan.