Chemical Resistance
At ambient temperatures, POLYROCK® is chemically resistant to most substances naturally occuring in the ground and a wide range of other substances such as sea water, dilute acids, alkalines and bleaching agents. Substances such as animal fats and diesel fuel will attack the surface of POLYROCK®,and organic solvent, petrol and concentrated acids can affect POLYROCK® to some degree. However, in all these cases the substance must be poresent in high concentrations to adversly affect POLYROCK®'s performance. Although such high concentrations are uncommon, POLYROCK® can be protected from chemical attack as an additional safeguard.
Appropriate protective measures need to be taken to prevent damage to POLYROCK® from harmful substances. James Hardie Building Systems recommends the use of impermeable geomembranes to protect POLYROCK® from the effects of petrol and solvents. Such membranes should have performance properties appropriate for the situation and be installed strictly in accordance with the manufacturers recommendations.
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.
