Ms-22 Construction Of Quality Asphalt Pavements Pdf 👑

To illustrate the value of MS-22, consider a real-world scenario (anonymized): A contractor paving a 10-mile stretch of interstate was failing density tests consistently on the transverse joints. The plant was producing good mix, the paver was calibrated, but every joint showed low density and subsequent ravelling.

The project engineer opened the ms-22 construction of quality asphalt pavements pdf to the section on end-of-day transverse joints. The manual provided three insights:

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.

MS-22 teaches that you should measure the mat temperature behind the screed, not at the plant. If the mat drops below the recommended compaction starting temperature (e.g., 280°F for PG 64-22 binder), stop rolling. Rolling cool asphalt only cracks it.

A surprising amount of damage can occur between the plant and the paver. MS-22 details: ms-22 construction of quality asphalt pavements pdf

The manual aligns with most state DOTs’ acceptance plans, covering:

Some universities with civil engineering programs have institutional licenses that allow students and faculty to download MS-22. Additionally, state DOTs sometimes reference MS-22 in their training materials, but they do not host the complete manual. Check your local DOT’s pavement library.