Carbon Black for Interlock Pavers and Concrete Products

Black Gold Chemicals manufactures modified carbon black for interlock pavers, curbstones, concrete tiles, and stamped concrete. Our paver grades give a deep, uniform black or grey, disperse easily in dry and wet mixes, and keep their color under sun and weather.

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The color problems paver producers face

Black and grey pavers are easy to sell and hard to produce consistently. The most common problems are:

• Shade changes from one batch or pallet to the next
• Streaks and spots from pigment that does not disperse fully
• High pigment dosage that raises the cost of every square meter
• Color that looks weaker after the pavers are exposed to sun and rain

Standard carbon black is made mainly for tires, not for cement. Our paver grades are modified for cementitious mixes to address these problems.

What our paver grades deliver

• Deep, uniform shade: consistent black or grey across the full production run.
• Easy dispersion: works in dry-cast and wet-cast mixes.
• Light and weather fastness: the color stays stable outdoors.
• High tinting strength: a deep shade at a low dosage, which lowers pigment cost per square meter.
• Batch-to-batch consistency: every batch is produced to defined parameters.
• Custom adjustment: the grade is adjusted to your cement, aggregates, and target shade.

Applications

• Interlock pavers
• Curbstones
• Concrete floor and roof tiles
• Stamped and decorative concrete
• Precast concrete products

Carbon black or iron oxide black?

Both are used to color concrete. Carbon black has much higher tinting strength, so it reaches a deep black at a far lower dosage than iron oxide black. Iron oxide is often chosen when producers prefer an oxide-based system. We supply both: modified carbon black for pavers, and Black Oxide 333, a high-dispersion black oxide. For red pavers, we also supply red oxide. Our team can help you choose based on your shade, cost target, and process.

Tips for a consistent shade

1. Add the pigment to the dry aggregates and cement before adding water, and keep the same mixing order in every batch.
2. Keep mixing time, water content, and cement source constant. They affect the final shade as much as the pigment does.
3. In two-layer pavers, add the pigment only to the face mix to reduce cost.
4. Approve the shade on cured pavers, not on wet ones.
5. Efflorescence (white salt deposits) can make dark pavers look grey. Controlling it is part of keeping a deep black.

How to get started

1. Tell us your product, mix design, and target shade.
2. We recommend the right grade and a starting dosage.
3. We send a free sample with its TDS and SDS.
4. You run a trial on your line, and we help fine-tune the dosage.
5. Regular supply at the same specification, batch after batch.

Frequently asked questions

How much carbon black do I need for black pavers?

It depends on the target shade, the cement color, and your mix design. After reviewing your mix, we give you a starting dosage and help you adjust it on a trial batch.

Does it work in both dry-cast and wet-cast production?

Yes. Our paver grades are designed to disperse easily in both dry and wet mixes.

Can I get grey shades as well as black?

Yes. Lower dosages give grey shades. We help you set the dosage for your target color.

Do you provide a TDS?

Yes. Once we identify the right grade for your application, we send its TDS and SDS.

Can I get a free sample?

Yes. Contact us with your application and we will send one.