Chemical stabilisation is the mixing of various chemicals into the pavement and not just the mere spraying of chemicals to the surface of the road.

The action of chemical binders in the pavement and subgrade materials are

Action Description
Adhesion: Act as a glue in bonding particles
Adsorption: To attract atmospheric moisture to reduce dust emission
Dilatant To dispel water when compacted under vibration
Dispersant Separates fine particles from each other
Ionic Bonding from a reversing of the electrostatic charge on some soil platelets
Surfactant To reduce surface tension.