Limestone mineral as concrete filler

Product information

Consistent quality control is maintained by three laboratories throughout the country, carrying out regular quality testing. We have our own X-Ray Fluorescence (XRF) machine to determine the calcium carbonate content of asphalt and concrete fillers.

Applications for Limestone filler

You can use our calcium carbonate powder for:

• Supplementary cementitious material.
• Road surfaces (A and B roads, motorways).
• Construction of airfields and runways (commercial and armed forces airports).
• Another use, not connected to the construction industry, is its use as a calcium-based agricultural fertiliser.

Limestone concrete filler quality assurance

Our Limestone concrete filler has the following:

• Minimum calcium carbonate (CaCO ₃ ) content of 70%
• Maximum moisture content of 1%
• Bulk density in kerosene between 0.5 and 0.9 Mg/m ³

Quick delivery turn-around-times

We can store up to 20,000 tonnes of filler across 60 strategically placed silos, allowing us to distribute throughout the whole UK on a just-in-time basis. We can also bag asphalt filler for export outside the UK.

LKAB Minerals has storage silos located on customer sites to collect excess material from the asphalt manufacturing process, which can then be recycled.

Applications

Limestone calcium carbonate powder is a versatile mineral filler with high purity and multiple industrial applications. It is widely used in construction, agriculture, and manufacturing. Some key applications include:

Concrete filler

• Used as a partial cement replacement in concrete to reduce clinker content and lower carbon emissions.
• Improves workability, finish, and long-term durability in ready-mix and precast concrete.
• Approved for up to 20% inclusion under updated UK concrete standards (2023).

Asphalt & road construction

• Used as a filler in asphalt mixtures to improve durability and surface performance.
• Commonly applied in A and B roads, motorways, and airfield runways.

Agricultural fertiliser

• Applied as a calcium-rich soil conditioner to enhance soil structure and crop yields.
• Neutralises acidic soils, improving nutrient availability for plant growth.

Animal feed additive

• Used as a calcium supplement in animal feed for bone and eggshell strength.
• Ensures optimal nutrition in livestock, poultry, and dairy farming.

Recycled asphalt storage & distribution

• Collected from customer sites to recycle excess asphalt filler for environmentally responsible reuse.
• Distributed efficiently across the UK with just-in-time delivery from 60 strategically placed silos.

Mineral information

Limestone mineral filler source

Our Limestone concrete filler is made from either:

• Excess filler from asphalt plants,
• Virgin Limestone,
• Or a careful balance of the above two sources.

Limestone toxicology

The product is harmless to the environment and non-toxic.