Introducing Keystone KeyMass® by Austral Masonry

Build higher, faster and smarter with Austral Masonry’s new Keystone KeyMass®. Designed to offer outstanding performance in gravity, no fines concrete, extender and geogrid reinforced applications, Keystone KeyMass® is Austral Masonry’s largest format concrete retaining wall block system – four times larger than standard retaining wall blocks. 

“Created in collaboration between Austral Masonry and Keystone Walls, the Keystone KeyMass® system is engineered to last.”

For low, non-critical walls up to 1.2 metres, the  Keystone KeyMass® retaining wall system is effective as a gravity wall structure, utilising their weight, interlocking pin system, and interaction of the units to resist earth pressures.

For mass gravity retaining walls, the no-fines concrete backfill system increases the mass of Keystone retaining walls allowing for maximum heights of up to 4.4 metres. This is ideal for boundary walls where geogrids would otherwise cross into the neighbouring property.

Keystone KeyMass® standard units can also be combined with Keystone KeyMass® extenders to create a wall that will resist overturning thanks to the interlocking units on the wall's face and the Extender units behind, which bear the weight of the fill behind the wall.

For walls up to 15 metres, or 25 metres with project specific designs, geogrids can be placed between layers of compacted soil to create a reinforced soil mass that acts as a larger gravity wall structure. Geogrids can be used with most existing soils and are not affected by water, micro organisms, alkalinity or acidity.

These systems can easily be achieved through the Keystone KeyMass® range, which consists of five products – Standard Unit for the face of the wall, Right Corner Unit and Left Corner Unit for 90 degree corners, Extender Unit for wall designs, and Capping Unit to finish the top of any wall.

Austral Masonry’s new Keystone KeyMass® system provides a number of key benefits for homeowners. 

Created in collaboration between Austral Masonry and Keystone Walls, the Keystone KeyMass® system is engineered to last. Benefitting from years of engineering excellence and expertise, the result is a strong, durable retaining wall system that is designed to last over a century.

Keystone KeyMass® is manufactured in Australia’s most advanced masonry production facility, ensuring exceptional efficiency and quality. Designed as a more cost-effective solution for homeowners, the system significantly reduces the need for manual labour and accelerates construction with large-format blocks that are machine-lifted into place. Each block features a hollow core, promoting effective drainage and reducing overall weight. In addition to its practical benefits, Keystone KeyMass® offers impressive design flexibility, making it suitable for both straight and curved walls. The blocks also feature a rustic split-face texture, thoughtfully crafted to blend seamlessly with natural surroundings.