Half paving without steel slag: what is available on the market? |
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Supplier solutions in response to uncertainty surrounding regulations
The season for constructing and maintaining half-paved surfaces is approaching. For contractors and suppliers, this is a busy period. At the same time, another issue is at play: uncertainty surrounding the use of steel slag. This article provides an overview of available products.
Since July 2025, temporary regulations have been in force in the Netherlands. For certain applications on land, the use of steel slag has been prohibited. In other cases, a permit is required. Meanwhile, the government is conducting research into potential environmental and health risks. It is still unclear what future policy will look like. This creates challenges for companies. Work continues, but decision-making becomes more difficult when regulations change or are temporary. Do you continue with existing materials, or choose an alternative? That decision often has to be made quickly.
Differences depending on the situation
The regulations do not apply equally in every situation. It depends on the application and location. Clients also deal with the issue in different ways. Some are cautious, while others explore what is still possible within the regulations. This makes the work less predictable. The discussion around steel slag stems from concerns about potential impacts on water, soil and health. At the same time, the material remains part of policies focused on reuse and circularity. This tension is clearly noticeable in practice.
Half paving JP Infra-advies
| Producer / supplier |
| JP Infra-advies |
| JP Infra-advies |
| JP Infra-advies |
| Brand / product name |
| GranoTop ECO |
| GranoTop Knisper |
| GranoTop Grijs |
| Material type (e.g. crushed rubble, lava stone, shell mix, etc.) |
| Quarry material + circular binder |
| Quarry material + circular binder |
| Quarry material + circular binder |
| General material composition |
| Yellow quarry material, lightly hydraulic |
| Grey and white limestone quarry material, lightly hydraulic |
| Grey limestone quarry material, lightly hydraulic |
| Type of binder |
| Circular hydraulic binder |
| Circular hydraulic binder |
| Circular hydraulic binder |
| Application |
| Cycle paths, footpaths, parking areas, buggy paths, golf courses, farmyards, squares, etc. |
| Primarily an alternative for renovating shell paths and constructing new paths or farmyards |
| Cycle paths, footpaths, parking areas, buggy paths, golf courses, farmyards, squares, etc. |
| Water permeability (l/m²/s or other unit) |
| 100 mm to 1,000 mm per hour, depending on the permeability of the foundation |
| 100 mm to 1,000 mm per hour, depending on the permeability of the foundation |
| 100 mm to 1,000 mm per hour, depending on the permeability of the foundation |
| Load-bearing capacity (CBR value or other specification) |
| 5 MPa depending on the foundation |
| 5 MPa depending on the foundation |
| 5 MPa depending on the foundation |
| Colour |
| Sandy yellow |
| Light grey with white stone particles |
| Grey |
| Grain size / fraction (e.g. 0/8 mm) |
| 0/8 or 0/11 |
| 0/8 or 0/11 |
| 0/8 or 0/11 |
| Origin of raw materials |
| Imported |
| Imported |
| Imported |
| Environmental certificate available? |
| NL-BSB product certificates. Finished product tested by an accredited laboratory |
| NL-BSB product certificates. Finished product tested by an accredited laboratory |
| NL-BSB product certificates. Finished product tested by an accredited laboratory |
| Remarks |
| GranoTop is a good alternative to Graustabiel |
| GranoTop is a good alternative to Graustabiel |
| GranoTop is a good alternative to Graustabiel |
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| The quarry material used is hydraulic. An additional binder prevents the surface from becoming muddy during rain and hard in winter |
| The quarry material used is hydraulic. An additional binder prevents the surface from becoming muddy during rain and hard in winter |
| The quarry material used is hydraulic. An additional binder prevents the surface from becoming muddy during rain and hard in winter |
Half paving De Beijer Bouwgrondstoffen BV
| Producer / supplier |
| De Beijer Bouwgrondstoffen BV |
| De Beijer Bouwgrondstoffen BV |
| De Beijer Bouwgrondstoffen BV |
| Brand / product name |
| GrauMix Circulair |
| GrauMix Primair |
| GrauMix Bio |
| Material type (e.g. crushed rubble, lava stone, shell mix, etc.) |
| Natural stone half paving with recycled aggregate |
| Natural stone half paving |
| Natural stone half paving |
| General material composition |
| A mix of various natural stones (greywacke and dolomite) with recycled aggregate |
| A mix of natural stones with binding properties (greywacke and dolomite types) |
| A mix of natural stone and a complex biopolymer |
| Type of binder |
| Natural stone and recycled aggregate with binding properties |
| Natural stone with binding properties (lime and clay) |
| A complex biopolymer |
| Application |
| Top layer for footpaths, cycle paths, parking areas, cemeteries, squares and parks, etc. |
| Top layer for footpaths, cycle paths, parking areas, cemeteries, squares and parks, etc. |
| Top layer for footpaths, cycle paths, parking areas, cemeteries, squares and parks, etc. |
| Water permeability (l/m²/s or other unit) |
| To be announced |
| To be announced |
| To be announced |
| Load-bearing capacity (CBR value or other specification) |
| To be announced |
| To be announced |
| To be announced |
| Colour |
| Light yellow |
| Sand-coloured |
| Variegated natural tones |
| Grain size / fraction (e.g. 0/8 mm) |
| 0/12 mm |
| 0/12 mm |
| 0/8 mm |
| Origin of raw materials |
| Mix of imported materials and locally recycled materials |
| Imported raw materials |
| Imported raw materials |
| Environmental certificate available? |
| Yes, in accordance with AP04 batch testing |
| Yes, in accordance with AP04 batch testing |
| Yes, in accordance with AP04 batch testing |
| Remarks |
| |
| Made from high-quality natural primary aggregates |
| Suitable for more intensively used paths and routes |
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| Similar appearance to the former Graustabiel 0/12 mm |
| High stability and load-bearing capacity |
Half paving De Hoop Bouwgrondstoffen
| Producer / supplier |
| De Hoop Bouwgrondstoffen |
| Brand / product name |
| Gres d'Hautrage |
| Type of material (e.g. crushed rubble, lava stone, shell mix, etc.) |
| Crushed natural stone (sandstone) |
| General material composition |
| Approx. 95% Silicon dioxide (SiO2) |
| Type of binder |
| Natural binding (reaction of moisture with naturally present silicon dioxide) |
| Application |
| Walking paths, cycle paths, recreational paths and parking areas |
| Water permeability (l/m²/s or other unit) |
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| Load-bearing capacity (CBR value or other specification) |
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| Colour |
| Grey |
| Grain size / fraction (e.g. 0/8 mm) |
| 0/8 mm |
| Origin of raw materials |
| Quarry in south-west Belgium |
| Environmental certificate available? |
| No |
| Remarks |
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This article was previously published on June 16, 2026 on the website of Stad + Groen.
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