What it is: Asphalt is a heated mixture of rock / sand (aggregate), and crude oils primarily used in road construction.

What it does: Steel drum rolled asphalt concrete once compacted over a firm base material provides flexible pavement to support traffic loads. In addition, asphalt is placed at a specified percent fall to divert water from the driving surface.

What we do: During the process of construction we check the subgrade soils and base material for relative compaction as required in the plans and engineered soils report. Also, check for soft and yielding subgrade areas which need to be reworked to a firm and unyielding condition. Once the subgrade and base material is in place and compacted the paver crew begin laying asphalt while an asphalt sample is obtained for unit weight and oil content in the lab. During placement and compaction of the asphalt pavement we consistently check temperature and relative compaction while updating the contractor on results during placement. Once, lab results are obtained we then submit reports to the owner and design engineer.

Aggregate Testing: Metzger Testing & Inspection obtains samples of aggregate materials for lab testing and sieve analysis.

Asphalt Field Services: We provide personnel and equipment to test the base material compaction followed by the compaction of asphalt paving. This may include a mobile laboratory, or we may simply provide personnel to inspect and assist with placement activities. This service fulfills a valuable role in the third-party quality assurance process.