Question

3. Compare the repairing rules of potholes for different standarts.

Answer 1

(3) The repairing rules of potholes by Pavement Maintenance and Repair (Australia)

The three repairing rules of potholes used by Pavement Maintenance and Repair(Australia) are-

1. Corrective Techniques

2. Preventative Techniques

3. Corrective-and-preventative Techniques

1.Corrective Techniques

This techniques is used to repair a given distress and improve the serviceability of the pavement.

The various types of corrective techniques are-

a.Full-depth repairs

It repairs fix cracked slabs and joint deterioration by removing at least a portion of the existing slab and replacing it with new concrete.

It maintains the structural integrity of the existing slab and pavement.

b.Partial-depth repairs

It repairs correct surface distress and joint,crack deterioration in the upper third of a concrete slab.

c.Cracking and seating

It is used prior to placing an asphalt or concrete overlay to control reflective cracking in the overlay.

2. Preventative Techniques

This techniques prevent the occurrence of a distress in order to maintain serviceability

The various types of preventive techniques are-

a. Joint and crack resealing

Its main function is to minimize the infiltration of surface water and incompressible material into the joint system.

The minimizing water infiltration reduces subgrade softening ,slows pumping and erosion of subgrade etc

b.Retrofitting concrete shoulders

It decreases the critical edge stresses and corner deflections which reduces the potential for transverse cracking, pumping, and faulting.

c.Retrofitting edge drains

By adding a longitudinal drainage system to a pavement helps in the rapid removal of water and may prevent pumping, faulting, and durability distress from developing.

3. Corrective and preventative Techniques

This techniques are used to repair and slow down or prevent the occurrence of a given distress and improve the serviceability of the pavement.

The various types of corrective and preventive techniques are-

a.Diamond grinding

It improves a pavement ride by creating a smooth, uniform profile by removing faulting, slab warping etc.

b. Dowel-bar retrofit

It helps in improving the load transfer increases the pavement’s structural capacity and reduces the potential for faulting.

c.Slab undersealing

It is used to stabilise existing pavement slabs by filling small voids beneath the slab and base or base and subbase.

d.Cross-stitching

It used to repair longitudinal cracks that are in a good condition. It increases load transfer at the crack by adding steel reinforcement to restrict expansion of the crack.