An overview of non-traditional backfill materials has been compiled from material identified in an international literature search carried out in 1992.
Materials considered include controlled low strength materials (CLSM), foamed concrete, fly ash, wood waste, expanded polystyrene (EPS), and various miscellaneous materials.
General information as well as composition, properties, advantages, limitations and typical applications are pr4esented for each material.
The properties determine the backfilling application to which each material is best suited.
Most of these materials have potential for use in New Zealand provided their advantages and limitations are recognised and understood by would-be users.
Keywords: Backfill, bridge abutment, bridges, flowable materials, foamed concrete, fly ash, New Zealand, pavement, polystyrene, roads, trench, tyres, wood waste