Research on Relationships among Different Disease Types of Cement Concrete Pavement Based on Structural Equation Model

Table 1

Characteristic description and typical legends of pavement diseases.

Pavement disease types	Feature description	Typical legend
Joint filler damage	Under the combined effect of environmental and load factors, the joint filler loses its elasticity and plugging effect.
Corner peeling	It refers to the damage caused by cutting the plate thickness at an oblique angle instead of through the plate thickness at the edge and corner of the plate.
Mud	Base material is deposited near the joints or cracks.
Surface crack	There are shallow cracks on the plate surface that do not penetrate the thickness of the plate. This kind of crack does not affect the bearing strength of the plate.
Surface peeling	Spalling, exposed stones, and potholes on the surface of the plate, which damage the flatness of the pavement surface.
Interplate slip	Uneven vertical displacements at the joints of adjacent plates.
Void at the bottom of the panel	Significant plate movements as aircraft wheels pass near cracks.
Secondary disease of the patch	Local repairs on the plate.
Plate fragmentation	It refers to the cracks that run through the thickness of the plate in the noncorner of the plate, forming more than 4 broken pieces, which have completely lost the original bearing capacity.
Plate fracture	There are cracks in the vertical and the horizontal direction that penetrate through the thickness of the plate. Usually, there are 1 or 2 cracks, which cause the plate to crack into 2 or 3 pieces.
Plate corner fracture	There are cracks through the thickness of the plate at the corner of the plate. The corner of the plate is broken. The side length of the corner is 1/10∼1/2 of the plate length, about 50∼100 cm.