Physical Properties
Despite its low density POLYROCK® will absorb only a limited amount of water. Immersion for 1 year results in approximately 5% by volume water absorption. Water may also be drawn into POLYROCK® by capillary action, but only in very limited quantities. Such levels have no significant affect on POLYROCKS®'s mechanical properties or performance. Where POLYROCK® is likely to be permanently immersed, a design density of 100kg/m³ should be used by the designer. Conversly, to ensure bouyancy, a design density of no more than 20kg/m³ should be used.
POLYROCK® is supplied non kiln dried. Block dimensions will not vary by than 1% fromm block to block
Brochures
Uses in Construction
Abutment Backfill
To reduce lateral pressure and differential settlements at bridge abutments
Hillside Roading
Construction of hillside roading embankments in steep terrain.
Lightweight Fill
For the protection of existing services such as stormwater or sewerage pipe systems
Road Embarkments
Reduce loads on subsoil compared to conventional embankments. This is the most common application in New Zealand for POLYROCK® so far.
