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Most grinding failures trace back to a bond mismatch, worn tooling, or the way the grinder is being run. Use aggressive 6/16-grit stage metal-bond discs, abrade 1-4 mm deep depending on the exposure level, then stage through finer metal and resin grit stages. Light exposure reveals scattered sand; medium exposure shows 30-60% of the stones; full exposure shows all aggregate.
For machine-matched tooling, browse our 3'' Metal Bond Diamond Grinding Disc with 4 Segments range.The key points in practice.
This is where most crews get it right - or lose time.
A closer look at the details.
On a floor abrading equipment, start with a 6/16 or 30-grit stage metal disc such as the HTC double-arrow segment disc in a soft matrix.
Getting this part right saves a full re-pass later.
What you should know before starting.
Contractors who skip this stage usually end up redoing the floor.
The key points in practice.
Cheap concrete with fine sand will never look like exposed-rock terrazzo.
This is where most crews get it right - or lose time.
A closer look at the details.
Getting this part right saves a full re-pass later.
What you should know before starting.
Gray granite or river gravel gives classic salt-and-pepper; limestone sands out to a near-uniform tone; rounded river stones look decorative.
Contractors who skip this stage usually end up redoing the floor.
The key points in practice.
Deep abrading reveals popped-out aggregate holes.
This is where most crews get it right - or lose time.
A closer look at the details.
On a 100 mm slab that is 33 mm, however practical exposure stops at 2-4 mm.
Getting this part right saves a full re-pass later.
What you should know before starting.
For interior decorative floors, a matte or wet-look sealing layer brings out stone color.
Contractors who skip this stage usually end up redoing the floor.
The key points in practice.
If the client wants uniform exposure, broadcast decorative aggregate into fresh concrete during installation — you cannot achieve it by abrading an existing plain slab.
This is where most crews get it right - or lose time.
A closer look at the details.
The first exposed-aggregate project in most cases goes too deep in spots.
Getting this part right saves a full re-pass later.
A: The practical answer is, Yes, as long as it is sound. Old slabs frequently have nicer aggregate than new ones, however inspect for laitance and coating layers first.
A: For most jobs, Use a heavy planetary grinder with uniform pressure, cross-pass, and stay off high spots. Uneven abrading shows as patchy exposure.
A: In short, You can stop at a ground texture, or continue to a burnished, sealed aggregate floor. Most decorative projects burnish to 400-1500 grit stage.
A: The practical answer is, Only if you strip more than ~2 mm on a thin slab. On 100 mm+ slabs, 2-4 mm exposure is safe.
Looking for the right tool? Check our 3'' Metal Bond Diamond Grinding Disc with 10 Segments. Looking for the right tool? Check our 3'' Metal Bond Diamond Grinding Disc with 5 Segments.Keep the sequence disciplined and the tooling sharp, and the surface will come out level and clean. Reach out to JOY TECH for a soft-bond disc set tuned to deep aggregate exposure.
Written and reviewed by JOY TECH - an SGS & BV audited, CE/RoHS certified diamond tools manufacturer founded in 2004, exporting to 50+ countries.
Our factory and quality management system are audited by SGS and Bureau Veritas. Products meet CE/RoHS requirements and every piece is 100% inspected before packing.
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