Quick Answer: To cut reinforced concrete, use a laser-welded segmented diamond blade, cut with water, and feed slowly and steadily so the segments grind through the steel instead of grabbing it. Plan the cut to avoid steel where possible, and expect blade wear to be faster than on plain concrete.

Understand What Is in the Concrete

Reinforced concrete usually contains rebar bars, welded wire mesh, or both. Steel is much harder on a blade than aggregate. Before you cut, use a rebar detector or scan the slab to locate the bars, so you can either cut between them or know exactly where the blade will hit steel.

Cutting blind through rebar risks segment loss and blade damage. A few minutes of scanning saves the cost of a blade.

Blade Selection for Steel

• Laser-welded segments: required for shock loads from steel. Sintered blades can shed segments on bars.
• Hard bond: resists the wear that steel causes; a soft bond loses diamonds too fast.
• Segmented rim: clears the steel swarf and stays cooler than a continuous rim.

When you shop the diamond saw blade catalog, look for the laser-welded and rebar-rated options rather than economy blades.

Cutting Technique

1. Run water: it cools the blade and flushes metal debris out of the kerf.
2. Cut in a straight line with the blade fully seated in the guide.
3. Feed gently when the blade meets steel. Let the diamonds work; do not push.
4. If the saw stalls or the blade glows, stop, let it cool, and resume with lighter feed.

Do not wobble the blade sideways to widen the kerf. That bends the steel core and is the fastest way to ruin a reinforced-concrete cut.

Plan the Cut Path

Where you can, position joints and openings to avoid rebar. Move a penetration, add a control joint, or shift the saw line to reduce steel contact. When the cut must pass through bars, cut those sections slower and with lighter pressure rather than powering through.

FAQ

Can you cut rebar with a diamond blade?

Yes, a laser-welded segmented blade grinds through rebar, but it wears faster and needs lighter feed than plain concrete cutting.

Why does my reinforced concrete cut overheat?

Steel friction generates heat faster than aggregate friction. Without water, the blade core overheats and the segments loosen. Use water or at least a dust shroud and periodic cooling.

Is it better to saw or break reinforced concrete?

For clean edges, saw. For demolition, a hydraulic breaker or saw-and-break is faster. Sawing gives you a straight, reusable opening.

Conclusion

Scan for steel, choose a laser-welded blade, cut wet, and feed gently through the bars. That routine keeps reinforced concrete cuts straight, safe, and far easier on your saw blades.