Loadbearing
recycled-aggregate block
Loadbearing masonry block made of 100% recycled aggregates (Belgian construction waste) + low-carbon Ecocem CEMIII/C cement. 1200×200 block in 3 thicknesses (90/140/190 mm). Fire class A1, REI120 (14cm) / REI240 (19cm). The supply-and-install price includes the stability study + as-built drawings + Madaster.
What is a loadbearing recycled-aggregate block?
The circular loadbearing block is a concrete masonry unit made of mixed aggregates from demolition and a low-carbon cement. The aggregates form the granular skeleton, while the cement provides cohesion as it hardens. All virgin aggregate is replaced by material that has already been in use.
The block carries the loads of loadbearing walls, performs in fire like standard concrete and is laid with ordinary mortar. Its mineral nature gives it good durability, and it takes common finishes without prior treatment.
The three thicknesses cover uses from internal loadbearing walls to external walls. The supply-and-install service includes the stability study, the as-built drawings and registration in a materials passport, which simplifies the traceability of the building.
It is manufactured in Belgium, at Familleureux, by Roosens Bétons. The producer sources aggregates from nearby sites and uses Ecocem CEMIII/C cement, a low-carbon steel-industry by-product. At end of life, masonry laid in traditional mortar can be dismantled and returns to the same recycling route.
Installation & uses
It is laid as conventional masonry, with a compatible mortar, like a standard concrete block. The three available thicknesses cover internal loadbearing walls, cross walls and external walls, with a standard base width. No special tools are required.
The producer supplies the stability study for the wall and the associated floor, as well as the as-built drawings and registration in a materials passport, as part of the supply-and-install service. This documentation makes it simpler to bring the blocks back into use at end of life.
The block can be finished with lime plaster or render, or left exposed, depending on the appearance sought. Its mineral nature takes common finishes without any specific prior treatment.
At end of life, masonry laid in traditional mortar can be dismantled, and the blocks crushed to become aggregates again. The producer already practises this loop, buying part of its raw materials from nearby sites.
About the producer
Roosens Bétons is a Belgian manufacturer of masonry blocks, hollow-core floor slabs and ready-mixed concrete, based at Familleureux in Wallonia. The group has been carbon neutral since 2014 through voluntary offsetting, and is developing a range of low-carbon blocks.
Its production combines standard product lines, such as EcoFix blocks made with grey cement and local limestone, and circular lines, such as Clayton, made with recycled aggregates and steel-industry cement. The company distributes through a network of builders' merchants and offers technical assistance to specifiers.
Technical performance
NBN EN 771-3 · PTV 21-001 (concrete masonry)
FAQ
Is the Clayton block loadbearing?
Yes. Its normalised compressive strength is 12 MPa, with the wall designed for 4 MPa. It falls under NBN EN 771-3 and PTV 21-001, and is used in both internal and external walls.
Which thickness should be chosen?
Three thicknesses, 90, 140 and 190 mm, for a 1200 × 200 mm block. Fire resistance follows thickness: REI 120 at 140 mm, REI 240 at 190 mm. The block is classed A1 for reaction to fire.
What happens to it at end of life?
Laid in traditional mortar, it can be dismantled. Its aggregates come from recycled construction waste, and the product is systematically registered in the Madaster materials passport.
Alongside
Same layer, same use · three materials to compare.
