L-M-N-O

Laydown
The portion of the asphalt paving process where the hot asphalt is actually placed or “laid down” by the paving machine.

Limestone
A sedimentary rock often used as a building material, and for the base layer in an asphalt or PCCP paving system, and the major stone component for asphalt materials produced in our region.

Mat, Asphalt
A term used to describe the fresh asphalt surface behind the paving machine. Most commonly used to refer to the asphalt during the laydown and compaction phase of construction.

Nuclear Density
Measuring the density of a previously placed material achieved by using a special instrument designed to measure the penetration of radiation into that material.

Overlay
The practice of placing new asphalt over an existing asphalt or concrete surface. Also called resurfacing.

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