One of the main objectives of the top asphalt layer is to provide a protective surface against water penetration and other harmful liquids such as chemicals. However, current construction equipments do not provide finished asphalt surfaces that meet this quality and therefore, allowing the intrusion of several liquids through the asphalt layers and deeper into the underlying soils. Subsequently...

PURPOSE Laser-induced breakdown spectroscopy (LIBS) was evaluated for its potential as a process analytical tool for the rapid determination of magnesium stearate (MgSt) distribution within and between tablets as well as between batches in a typical manufacturing run, and for the comparison of direct-compression and roller-compaction processes. METHODS These studies were conducted using a pro...

The Naval Civil Engineering Laboratory has conducted a study of the potential applications of isotopic devices and techniques within the Naval Shore Establishment. Radiation characteristics, general applications of isotopic devices, and specific problem areas are discussed. Recommendations are included for the use of surface density and moisture gages in the inspection of compacted earth, and f...