The Mechanical Hazard of Slurry Undercutting
Unlike cured concrete which produces fine paste, asphalt contains unbonded silica sand grains that act like liquid sandpaper against spinning steel cores.
Blade Technology
Published: 2026-05-19
Asphalt vs. Cured Concrete Cutting: Why You Need Drop-Segment Protection
Direct Answer: Asphalt and green (uncured) concrete generate highly abrasive slurry composed of loose sand and aggregate particles during cutting. This slurry swirls inside the kerf and washes against the joint where the diamond segment meets the steel core, causing a catastrophic phenomenon called "undercutting." Asphalt diamond blades require hard metal bonds and recessed "drop segments" or carbide pin inserts extending down onto the steel core to shield the weld joint from slurry erosion.
🔗 Related Technical & Buyer Guides
Frequently Asked Questions
What is a drop segment on an asphalt diamond blade?
A drop segment is an extra-deep diamond segment that extends farther down toward the center of the steel core to block abrasive slurry from wearing away the core weld joint.