Technical Reference

Treatment Procedures.

Step-by-step waterproofing, structural repair and rehabilitation methods, grouped by the chemistry they use, each mapped to the Armstrong products that carry it out. Select a treatment to view the full procedure and product recommendations.

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Treatment · Strengthening & jacketing

Micro Concrete Column Jacketing

Cast jackets for deep repairs and strengthening

Applications

Weak or damaged columnsBeam soffits and sidesDeep repairsCongested reinforcement

Procedure

The engineer fixes the propping, the extra bars and links, the jacket thickness and the grade of micro concrete.
Remove loose and delaminated concrete to a sound base and treat the existing steel.
Tie new bars and anchor starter bars and dowels in drilled holes with RAPIDSTRONG AG.
Set up watertight formwork with a pouring point and air vents, ready to close.
Brush ROOFBOND EP onto the prepared concrete, close the formwork and pour within its overlay time of 2 to 3 hours at 30°C.
Mix the micro concrete with the stated water until smooth and pour or pump it from one side without a break.
Strike the formwork and water-cure for 7 days.

Important Suggestions

Retrofit the beam-column joint along with the column, or the weak point moves to the joint.

Why This Treatment?

Micro concrete is a pre-packed, free-flowing, non-shrink concrete with small aggregate. It fills tight spaces around congested steel without a vibrator.