Pumping of rigid pavements is a major contributor to rigid pavement failure. Fines can be removed through pore water pressure buildup in the subbase or through surface erosion of subbase and shoulder materials. ... Pumping in stabilized layers is caused primarily by surface erosion of these layers.

What is pumping in rigid pavements?

Pumping of subgrade material is a leading cause of damage to and failure of rigid pavements. In the pumping process water infiltrates a pavement at the joints and edges of the slab, and, later in life, through cracks in the slab. This water accumulates in voids between the pavement slab and the subgrade material.

What is the advantage of rigid pavement?

The largest advantage of using rigid pavement is its durability and ability to hold a shape against traffic and difficult environmental conditions. Although concrete pavement is less expensive but has less maintenance and good design life.