Localized Repair (LOR)
Definition - What does Localized Repair (LOR) mean?
Localized repair (LOR), also called point source repair (PSR), is performed on sectional defects in an otherwise defect-free pipe. LOR is used when the defect is less than the length from two adjacent access points, making complete replacement impractical. Localized repair employs resin-or cement-based grout depending on the application.
Trenchlesspedia explains Localized Repair (LOR)
The localized repair can be performed by personnel. Widely available specialized machines can also apply the repair material remotely to defects ranging from 4 to 24 inches in diameter. Localized repair is a cost-effective solution to four problems: a loose structural part (such as in masonry), aid in structural integrity of damaged pipes, aid in sealing to avoid infiltration and exfiltration, and to replace missing pipe sections.
There two categories of localized repairs: grouting link seal and spray on lining. Grouting link seals can be adapted to many geometric configurations and improve the structural integrity of the pipe while also repairing the defect. Spray on lining is used when structural integrity is not compromised and is especially useful for damaged sections with lateral joints.