High-pressure water scabbling (or hydrodemolition) is an advanced technique for removing damaged or contaminated concrete surfaces using ultra-high-pressure water jets (typically 500–1,500 bar). This method is increasingly replacing mechanical tools (e.g., jackhammers) due to its precision, environmental benefits, and ability to preserve structural integrity.
Water jets penetrate micro-cracks in the concrete, creating subsurface pressure that spalls off the weakened layer.
Selective removal: Only damaged/concrete with low cohesion is removed, leaving sound concrete and rebar undamaged.
No mechanical stress: Eliminates vibration-induced cracks common with traditional methods.
Key Applications
✔Infrastructure Rehabilitation
Bridge Decks: Removal of chloride-contaminated concrete before overlay.
Parking Structures: Eliminating spalled concrete without damaging post-tensioning cables.
✔Nuclear & Industrial Facilities
Decontamination: Removing radioactive/chemical-laden concrete (minimizing hazardous waste).
✔Surface Preparation
Bonding Enhancement: Creates an ideal rough profile (CSP 3–5) for new concrete overlays or coatings.
High-pressure water scabbling offers unmatched precision and sustainability for concrete surface preparation. Its adoption is growing in infrastructure, nuclear decommissioning, and industrial maintenance, driven by demands for longer asset life and reduced downtime
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