The manual breaks the compaction process into three distinct phases:
Recent editions of MS-22 add sections on WMA, which is produced at lower temperatures (50–100°F lower than HMA). The manual explains how lower temperatures affect compaction timing, rolling patterns, and density achievement. ms-22 construction of quality asphalt pavements pdf
– They may offer discounts for students or bulk licenses for training. The manual breaks the compaction process into three
: Ideal for contractors, engineers, and students involved in asphalt pavement design and construction. Pairs well with MnDOT’s other resources, such as the Design Manual and Statewide Pavement Management Plan . Access it here for free to evaluate its relevance to your projects. : Ideal for contractors, engineers, and students involved
After implementing MS-22 recommendations (saw-cutting joints, re-tacking just before paving, and using a small vibratory roller immediately), joint densities rose from 88% to 94.5% – well above specification. The agency waived a $200,000 penalty. The PDF paid for itself a thousand times over.
The paver is the heart of the operation. MS-22 explains how to manage the "head of material" in front of the screed to ensure a smooth, uniform thickness. It also covers advanced topics like: Automatic grade controls. Joint construction (longitudinal and transverse). Screed adjustments. 5. Compaction: The Most Critical Step