Local Road Management Manual 389 DEFINITION This is a distress that only occurs on rigid pavements. Example: Severe Scaling—rough texture Scaling is the disintegration or loss of concrete from the surface of the pavement. Initially only ifne aggregate and mortar is lost but large aggregate is also lost when the defect becomes more severe. Scaling is caused by poor quality concrete, improper ifnishing techniques or traiffc abrasion. METHOD This item is assessed over the total carriageway area of the segment. (Refer to “Procedure For Rating” in section 2.5) Although initially assessed from a slow moving vehicle, closer inspection of the suspected affected areas might be required. MEASUREMENT The length of scaling defect per width band is rated per 100m lengths. If a segment has 6 lanes with Scaling then this is recorded under 4 lanes and 2 lanes. This item is rated in the same way that wearing surface in asphalt pavement is rated.