What are the three layers of pavement structure?
1 Answers
Pavement structure is generally divided into three layers: the subbase course, base course, and surface course, with less consideration given to the pavement bedding layer. Below is relevant information: 1. Pavement classification: Pavements are classified into four grades based on the composition of surface materials, structural strength, traffic capacity, and quality of use: high-grade pavement, sub-high-grade pavement, medium-grade pavement, and low-grade pavement. 2. Corresponding grades: Matching highway grades, expressways, first-class, and second-class highways correspond to high-grade pavement; second-class and third-class highways correspond to sub-high-grade pavement; fourth-class highways correspond to medium-grade and low-grade pavement.