Method · Repair & strengthening
Carbon-fibre plates or sheets bonded with epoxy raise the load a floor, beam or column can carry. Designed by a structural engineer to ACI 440.2 before installation.
Carbon-fibre plates or sheets bonded to concrete with epoxy adhesive. It is not a repair — the goal is to raise the load a structure can carry.
When a floor, beam or column must carry more load — for example, raising a floor's load capacity.
It is designed by a structural engineer to ACI 440.2 before it is installed; damaged concrete is repaired first.
Layers (built up from the bottom)
Carbon-fibre plate for straight members, or sheet that can wrap corners — pressed into the adhesive.
A two-part epoxy spread on the concrete and on the strip, which bonds the two.
Laitance ground off to a rough surface; blowholes and unevenness filled first.
The figure shows one typical build-up. The actual layers are decided after we see the site.
We find the cause — corrosion, movement, leakage or overload — and pick the method for it.
CFRP strengthening is designed by a structural engineer to ACI 440.2 before it is installed; damaged concrete is repaired first, and the resin's heat and fire limits are checked.
We find the cause first, then pick the method for it — not just "cover it up".
| Method | What it does | Symptom |
|---|---|---|
| Patching — Surface Repair | Hand-fill chipped/spalled areas. No formwork; about 30–50 mm per layer by product (less overhead). Polymer-modified repair mortar. | Chipped / spalled surface |
| Grouting — Filling Voids | Pour or pump into large voids in columns, beams, machine bases (formwork / pressure). Non-shrink grout (no shrink when cured as directed, tight bond) ・ Epoxy grout (high strength, resists chemicals and vibration). | Large void in a column, beam or machine base |
| Crack Injection — Epoxy or PU resin | Epoxy resin restores strength in dry cracks ・ wetter cracks take flexible PU resin, which seals but does not restore strength. | Structural crack — restore strength |
| Crack Injection — Stop leaks: PU Foam | Foams on contact with water and stops it fast. | Crack that leaks water |
| Crack Injection — Stop leaks: Hydrogel | Swells into a soft, flexible gel — for leaks at joints that move a little. | Leak at a moving joint |
| CFRP Strengtheningthis page | Not repair — the goal is to increase the load a structure can carry (e.g. raise a floor's load capacity). 3 forms: Fabric/Wrap ・ Plate/Laminate ・ Rod/Bar. Requires structural-engineer design (ACI 440.2); damaged concrete is repaired first. | Need to carry more load |
Also with this method:Grand Center Point · The Forestias · Le Méridien Resort Bang Phli · Bangkok Insurance · Amari Pattaya · Terminal 21 Asok · Saitarn Samui Resort · Bobae Tower · Muang Thai Life Insurance Building · Bangkok Hotel Lotus Sukhumvit · Mektec Precision · Pandora Production · Mitsubishi Electric Consumer Products · Global Chemical Factory
The length and form of the strengthening (plate or sheet), access (work under beams and ceilings is slower), the substrate repair needed and the structural design. Send drawings and the load you need on LINE.
No — it is strengthening. The goal is to raise the load a structure can carry. Chipped surfaces, voids and cracks are repaired with patching, grouting or crack injection.
A structural engineer designs it to ACI 440.2 (current edition) before it is installed. Damaged concrete and corroded steel are repaired first, and the resin's heat and fire limits are checked.
Send photos of the crack or damage and where it is. We diagnose the cause and propose the method.
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