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CFRP strengthening service for enhanced structural stability – using carbon fiber sheets.

U-Turn Bridge Bottom Slab Strengthening, Ratchaburi — SMARTFIBER-SHEET UT70-30 · SmartCoating
Bridge Strengthening · Department of Highways · #1 in CFRP

U-Turn Bridge Ratchaburi

Strengthening the precast concrete bottom slab of a horseshoe-shaped U-turn bridge in Ratchaburi Province with SMARTFIBER-SHEET UT70-30 to meet Department of Highways standards.

3,100
MPa Tensile Strength
NDT
Quality Inspection
#1
#1 in CFRP

Project Photos

Project Overview

This project involved the structural rehabilitation of a horseshoe-shaped U-turn bridge in Ratchaburi Province. Assessment revealed that the precast concrete bottom slab was unable to support loads in accordance with Department of Highways standards. The design engineers specified strengthening using SMARTFIBER-SHEET UT70-30, a high-strength carbon fiber reinforced polymer (CFRP) sheet.

Strengthening Objectives

  1. ▸

    Increase the load-bearing capacity of the bridge bottom slab

  2. ▸

    Bring the structure into compliance with Department of Highways safety requirements

  3. ▸

    Reduce the risk of cracking or damage from continued use

  4. ▸

    Extend the service life of the bridge with modern reinforcement technology

Installation Process

  1. 1

    Assess Slab Condition & Define Reinforcement Positions

    The engineering team surveyed and analyzed the condition of the precast concrete bottom slab, assessed load capacity against Department of Highways standards, and determined the appropriate CFRP installation positions and directions.

  2. 2

    Prepare Concrete Surface for Bonding

    Clean the bottom slab surface of dust, grease, and deteriorated areas, and level the surface to ensure complete epoxy adhesive bonding with SMARTFIBER-SHEET UT70-30.

  3. 3

    Install SMARTFIBER-SHEET UT70-30 with Specialty Epoxy

    Install SMARTFIBER-SHEET UT70-30 on the underside of the bottom slab following engineer-designed orientations, using high-quality epoxy adhesive to increase bending and tensile capacity along structural lines.

  4. 4

    Quality Inspection via Non-Destructive Testing (NDT)

    Conduct non-destructive testing at every installation point to verify bond integrity and confirm the bridge structure meets Department of Highways requirements.

Strengthening Materials

1

SMARTFIBER-SHEET UT70-30 — Bridge Bottom Slab Strengthening

Carbon Fiber Reinforced Polymer (CFRP) sheet installed on the underside of precast concrete slabs. Tensile strength exceeding 3,100 MPa — lightweight, easy to install, and resistant to moisture, temperature, and chemicals.
  • Tensile strength exceeding 3,100 MPa
  • Installed on the underside of the bottom slab
  • Lightweight — adds no dead load to the structure
  • Resistant to moisture, temperature, and chemicals

Project Results

🌉
Compliant
Bridge structure meets Department of Highways requirements
🚗
No Closure
Installed without stopping traffic or reducing bridge capacity
🏗
0 Demo
No demolition or replacement of existing bridge structure
⏳
Long-Lasting
Reduces maintenance cost and extends service life
🔬
NDT
Passed non-destructive testing at every installation point
🏆
Benchmark
A benchmark case for CFRP application in infrastructure works