Since 1974 Campbell Scientific manufactures dataloggers, data acquisition systems, and measurement and control products used worldwide in research and industry. Our instrumentation is known for its flexibility, precision measurements, and dependability—even in harsh, remote environments.
Campbell Scientific Inc.
In the construction of paved roads, one of the most important design aspects is the compaction of the subgrade material. The specification for compaction of the subgrade materials has conventionally been set based on the Proctor compaction test (AASHTO T99) conducted on a particular subgrade...