Excavated Soil

From Clay Excavated Soil to High-quality Building Material

A Valuable Resource in the Construction Industry

RECYCLING OF EXCAVATED MATERIAL

The construction industry generates millions of tonnes of excavated soil every year — making it the largest waste stream in Germany. There’s a growing consensus that this material is far more than just waste: it’s a valuable resource. And lawmakers are increasingly putting soil recycling on the agenda.

With its roller technology, Crush + Size Technology has opened up a new way to process and recycle this material. In practice, the crushing process even has an additional drying effect: the clayey components break down more easily into finer particles. As a result, dry methods become a viable option for separating the rock from the clay.

In practice, the crushing process has been found to have an additional drying effect on the material, causing the clayey components of the excavated soil to break down more easily into finer particles. This side effect makes it possible to consider dry methods for separating the rock from the clay.

A Valuable Resource in the Construction Industry

ADVANTAGES OF ROLLER
CRUSHERS

Our crushers handle even clay-rich excavated soil without clogging — and turn the rock content into a high-quality building material along the way. The soil is fed directly or via a suitable conveyor onto the rollers, where rocks and other mineral components are crushed. Processing the material using a roller crusher makes the entire process extremely compact, as it eliminates the need for complex pre-separation.

This is where our roller technology really shows its strength: the rock isn’t just crushed, it’s reduced precisely to the desired target particle size. The robust design handles rocks of up to 300 MPa — covering virtually all rock types without issues.

Our roller crushers for soil recycling also offer high power and throughput reserves and are equipped with a hydraulic gap adjustment system that acts as an overload protection mechanism for materials containing foreign matter, ensuring uninterrupted operation.

Recycle and Increase Efficiency

EXTRACTING ROCK FOR FROST PROTECTION AND SUBGRADE CONSTRUCTIONS

The end result: a defined final grain size, recovered directly from the excavated soil. The material can be reused right away on the construction site — as a frost protection layer or as a load-bearing subbase, with excellent compaction and drainage properties.

If you want to take it further, the material can be washed in a soil washing plant. Because the maximum particle size in the crushed material is limited, the resulting mix is well suited to screen washing and other soil washing processes — and the upstream crushing step makes the whole process more efficient by homogenising the material and reducing the load on the equipment.