Resources

The NZTA B10 Specification for Hi-Lab design, production and construction (version 1) and Notes (version 1) has been developed and published. The specification covers the manufacture of the Hi-Lab materials, and construction of Hi-Lab structural pavements.

Hi-Lab is used for heavy duty pavements. The pavement structure consists of a very densely packed and interlocked, mainly single sized large aggregate skeleton, combined with a low cement and fines void filler. Hi-Lab can be used for new construction or rehabilitation overlays.

The areas covered by the specification include:

• materials
• plant and equipment for materials production and placement
• placement of aggregate and spreading of cement
• the mixing process, compaction and finishing.

NZTA B10 is a new specification and provides an alternative to deep lift asphalt for heavy duty pavements.