Soil Recycling

Using the world-class Reterra soil stabiliser, Hiway Environmental offers customers a cost effective and environmentally sound way to treat materials and improve soil performance. Hiway Environmental owns and operates the only two Reterra recyclers in New Zealand.

The Reterra is a purpose-built, mobile soil stabilising and conditioning machine that outperforms conventional stabilisation methods. A fast, efficient way to deal with a wide range of scenarios, the Reterra recycles soil for improved performance, remediates contaminated soil and manufactures binder treatment aggregates.

A mobile machine, the Reterra significantly lowers costs by reducing the reliance on labour, transport and landfill. Internationally, stabilisation and solidification of soils and granular materials is regarded as a proven way to treat or improve the engineering or chemical properties of in-situ unsuitable materials. Hiway Environmental has brought the latest technology to New Zealand for a cost effective, environmentally sound solution to what is often a costly geotechnical problem.

Reterra Ex-Situ Stabilisation


Bioremediation of contaminated soils.

Stabilisation and solidification of contaminated soils, dependent on contaminants.

Soil recycling and stabilisation to improve engineering properties.

Reuse of stabilised materials for construction purposes.

Solidification of sludge and high water content soils.

Cement treated basecourse and aggregates for road construction.

Soil Recycling

New Zealand’s only Reterra soil recycling machinery is delivered to you with Hiway Environmental’s engineering expertise.

Backdrop Environmental SoilRecycle 2


Reusing recycled soil eliminates the costs associated with transportation, labour, landfill disposal and purchase of new materials.

Suitable for a wide range of soil types from friable to highly plastic clays; silt, sand up to 200mm aggregate; contaminated soils, mud and sludge (where no dewatering is required).

Mobile machine is easy to move onsite with a conventional low loader.

On board computer control ensures quality control and a consistent mixture of soils and binders to achieve the desired soil strength.

Causing minimal dust, noise and vibration, the Reterra is a low environmental impact solution.


With the only two Reterra soil recycling machines in New Zealand, Hiway Environmental offers the best possible soil recycling technology available locally. This technology, combined with the specialist knowledge of our team, allows us to deliver proven and innovative solutions for our customers.

Design & Project Management Services

With a proven track record, Hiway Environmental delivers full design and build services for clients looking for a durable, high-performance solution. Our team can design a tailor-made mix of binding agents to treat specific soil conditions.