The paver screed floats on the asphalt mix. It relies on a balance of forces: the towing force, the mat resistance, the weight of the screed, and the angle of attack.
Stockpiles must be managed carefully to prevent segregation and moisture accumulation. Standard practices include separating aggregates by size and building stockpiles in horizontal layers rather than conical piles. Temperature Control
Aggregates should be stockpiled in horizontal layers rather than cone shapes to minimize gravity-induced segregation.
No chapter is more dog-eared than the compaction section. MS-22 teaches: ms-22 construction of quality asphalt pavements pdf
Achieving a high-quality pavement requires continuous field testing and inspection to ensure compliance with project specifications.
Chapter 10 of the MS-22 manual specifically details the creation of a QA plan, including sampling techniques and testing.
: Proper application of emulsified asphalt to ensure a strong bond between layers. 2. Paving Operations Screed Management The paver screed floats on the asphalt mix
The Asphalt Institute revises MS-22 approximately every 5–7 years. Always check your PDF’s copyright date. The most widely used editions are the 3rd Edition (mid-2000s) and the 4th Edition (mid-2010s). A 5th Edition may be in development at the time of your search.
Below is an extensive breakdown of the critical phases, technical requirements, and quality control measures outlined in the MS-22 standard. 1. Materials Handling and Mix Design Verification
, such as segregation, low density, and poor surface texture. Standard practices include separating aggregates by size and
The manual can be purchased through the Asphalt Institute.
The screed floats on the asphalt mix. Its thickness is governed by a balance of forces, including tow speed, angle of attack, head of material, and mix temperature.
This foundational chapter introduces asphalt, asphalt mixtures, and asphalt pavement definitions. It covers the classification of asphalt mixtures, distinguishing between dense-graded, open-graded, and gap-graded mixtures, and explains the need to balance the four critical phases of the construction process: production, transportation, paving, and compaction.