What does road surface inspection mainly detect?

[ColtonDella]

Inspection items include soil, water, rocks, cement, etc. Below is the relevant introduction to non-destructive road surface inspection: 1. Introduction: Non-destructive road surface inspection refers to testing methods that can measure and inspect parameters such as thickness, reinforcement position, internal defects, and certain physical-mechanical properties without damaging the road surface. 2. Expansion: It is generally conducted using acoustic and electrical principles, radioactive isotopes, and electronic instruments. For example, microwaves or sound waves are used to reach the desired depth by selecting frequencies, and then the density, strength, and thickness of the road surface are measured based on differences in dielectric constant or sound speed in materials of different layers. The advantages are: no damage to the road surface; fast inspection speed (almost instantaneous); and the ability to inspect at any time and repeatedly.