BLOGS
Asphalt Diamond Blade: Why Asphalt Destroys Ordinary Blades
An asphalt diamond blade is engineered specifically for one of the most abrasive materials in construction. Ordinary concrete blades fail fast in asphalt — dedicated blades feature tough wear-resistant bonds and hard-metal undercutting protection below the segments.
Why Asphalt Is Different
- Extreme abrasion: asphalt's sand and bitumen matrix grinds away blade bonds and steel cores.
- Undercutting: abrasive slurry erodes the core just below the segment, causing segment loss — hence protective design.
- Heat: bitumen softens with heat; fast cutting with water cooling prevents smearing.
Specifications
| Diameter | Segment height | Thickness | Segments | Bore |
|---|---|---|---|---|
| 250–300 mm (10–12") | 10/12/15 mm | 2.8–3.2 mm | 18–21 | 25.4/50 mm |
| 350–400 mm (14–16") | 10/12/15 mm | 3.2 mm | 24–28 | 25.4/50 mm |
| 450–500 mm (18–20") | 10/12/15 mm | 3.6 mm | 31–35 | 25.4/50 mm |
| 550–600 mm (22–24") | 10/12/15 mm | 3.6/4.2 mm | 39–42 | 25.4/50 mm |
Craftsmanship: laser welding. Machines: walk-behind saws and flat saws. Also suitable for abrasive concrete products and green concrete.
Usage Tips
- Always cut asphalt wet where possible — water flushes abrasive slurry from the cut.
- One blade, one material: a blade used on asphalt should not be switched to cured concrete (bond is matched differently).
- Inspect the core below segments regularly for undercut wear.
FAQ
Can I use an asphalt blade on concrete?
It will cut but usually slowly on hard cured concrete — asphalt bonds are harder to resist abrasion. For mixed fleets, order asphalt-and-concrete combo bonds.
What size blade for road repair work?
350 mm (14") is the most common for patch work on walk-behind saws; 450–600 mm for deeper road cutting.
How long does an asphalt blade last?
Life varies hugely with aggregate type. Protective-segment designs typically outlast standard blades severalfold in pure asphalt.
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