Design Optimization and Performance Evaluation of the Open-Graded Friction Course with Small Particle Size Aggregate

Table 1

The main technical indexes of WEA.

Items	Particle charge	Residue on the 1.18 mm sieve (%)	Solid content (%)	Surface dry time (h)	Dry time (h)	Heat resistance (°C)	Impermeability (0.4 MPa, 30 min)	Tensile strength (MPa)
Test value	Cationic	≤0.1	50 ± 2	<1	<3	163	Impervious	2.1–2.5