Geotextiles provide five important functions: it enhances roadway performance, separation, stabilization, reinforcement and drainage.
The primary cause of pavement deterioration is contamination of the aggregate base, causing a loss in aggregate strength. When aggregate is placed on a subgrade, the bottom layer becomes contaminated with soil.
Over time, this decreases the effective aggregate thickness destroying the road support and reducing roadway performance and life. Proper use of geotextiles eliminates these problems.