Interlocking Concrete Pavement Institute (ICPI) Certification Practice Exam 2026 - Free ICPI Practice Questions and Study Guide

When reinstating a section, you leave a bedding sand border wide enough to contain the disturbed sand and allow you to properly re-establish elevation and compaction without interfering with the surrounding area. Six to twelve inches provides a practical margin to cleanly re-lay bedding sand, maintain uniform jointing, and protect adjacent edges during compaction and finish. A border narrower than this can let sand and subgrade material creep into nearby joints or areas, while a much wider border adds unnecessary work without providing extra benefit. Therefore, six to twelve inches is the appropriate width.