Knowde Enhanced TDS
Identification & Functionality
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Ready-to-Use Product Features
- Advantages
- Useable on bridge decks and slab-on-grade concrete pavements
- No offensive odors during installation
- Prevents infiltration of chloride ions and water
- Available in various textures
- Useable within hours after placement
- Extends concrete life-cycle
- An initial cost effective, corrective and protective system
- Low life-cycle cost
- Repairable
- Volume mix ratio: 2:1
- Limitations
- Will discolor if used as a topcoat and exposed to sunlight
- Do not install 309 FlexGard T on wet surfaces (i.e., in the presence of standing water)
- Minimum cure temperature: 40° F (5° C)
- Do not thin EPC with solvents
- Product Highlights
- 309 FlexGard T is formulated for interior or exterior use and possesses excellent impact resistance and wearability, even when exposed to steel wheels carts of high speed bridge traffic. Formulated to meet VOC regulations, 309 FlexGard T may be applied above 40°F (5°C).
- 309 FlexGard T was designed to provide high strength in thin overlays. Typical overlay thickness ranges between 1/8” and 3/8”.
Applications & Uses
- Markets
- Applications
- Application Method
- Compatible Substrates & Surfaces
- Product Application
309 FlexGard T EPC overlays are easily installed by professional contractors and DOT maintenance crews. Refer to Thermal- Chem’s System Installation Guide – Broadcast Industrial Kitchen Flooring System or System Installation Guide – Broadcast Parking Garage.
- Aggregate Selection
Particle shapes, as well as gradation, are important factors in developing a balanced mix that will properly wear and chemically protect the concrete. Larger aggregates may be added to the epoxy mixture for composite mix designs and surface profiling. Subangular silica or aggregates are recommended for EPC’s. Low void content in the sand mixture will require less epoxy resin. All aggregates must be clean and dry. Consult with a Thermal-Chem representative or Thermal-Chem Corporation for factory approved EPC formulations.
- Uses
Typical overlay uses for 309 FlexGard T include bridge decks, ramps, loading docks, industrial floors, commercial kitchens, worn and polished concrete on elevated or slab-ongrade surfaces, when these conditions are present:
- Concrete with a chloride content at the top mat of rebar of less than 1.2 kg/m3 (2 lb/yd3)
- Rebar with less than 5 cm (2 in) of concrete cover
- High permeability concretes
- Concretes that have need of, or have been, extensively patched
- Extensively cracked concrete
- Concretes with micro-cracks in cover over rebar
- Concretes with low bald tire skid numbers, typically less than 25
- Where high strength, low modulus material is preferred over high modulus material.
- Conditions where rapid thermal cycling are present. ie commercial kitchens
- Industrial kitchens using wash down water of less than 150°F
Properties
- Physical Properties
- Note
Typical Physical Properties at 77°F (23°C)
| Value | Units | Test Method / Conditions | |
| Neat Epoxy Mixing Ratio (Volume) | 2 : 1 | — | — |
| Neat Epoxy Viscosity (A+B mixed) | 10 - 25 | poises | ASTM D2393 |
| Neat Epoxy Potlife | 20 - 30 | minutes | ASTM C881 |
| Neat Epoxy Gel Time (60g. mass) | 20 to 25 | minutes | ASTM C881 |
| Neat Epoxy Tensile Strength | min. 2,000 | psi. | ASTM D638 |
| Neat Epoxy Tensile Elongation | 30 - 40 | % | ASTM D638 |
| Neat Epoxy Modulus of Elasticity | 4 - 8 x 102 | MPa | ASTM D638 |
| Epoxy Polymer Concrete Bond Strength | min. 1,450 | psi | ASTM C882 |
| Epoxy Polymer Concrete Water Absorption | max. 0.6 | — | ASTM D570 |
| Epoxy Polymer Concrete Ash Content | max. 0.5 | — | ASTM D482 |
| Epoxy Polymer Concrete Compressive Strength (4 hrs.) | min. 1,000 | psi | ASTM C579 |
| Epoxy Polymer Concrete Compressive Strength (24 hrs.) | min. 4,000 | psi | ASTM C579 |
| Epoxy Polymer Concrete Compressive Strength (7 Days) | min. 5,000 | psi | ASTM C579 |
| Epoxy Polymer Modulus of Elasticity | 0.6 - 1.0 x 10³ | MPa | ASTM C579 |
| Epoxy Polymer Flexural Strength | min. 2,000 | — | ASTM C580 |
| Epoxy Polymer Thermal Compatibility (5 cycles) | Passes | — | ASTM C884 |
| Epoxy Polymer Coefficient of Thermal Linear Expansion | 5 - 9 x 10⁵ | Mm/mm/°C | ASTM D696 |
| Epoxy Polymer Adhesive Strength | 250.0 | psi. | ACI 503R Appendix A 24 hrs. |
Regulatory & Compliance
- Compliance
- ACI 548 Epoxy Polymer Concrete Broadcast Overlays
- AASHTO-AGC-ARTBA, Task Force 34, Epoxy Polymer Concrete Overlay
Specifications
- ASTM C881
- Type III; Grade 2; Classes B and C
Safety & Health
- Product Handling
Warning : For professional use only. Avoid contact of uncured material with skin and eyes. Contact with skin may result in irritation. Wash skin with soap and water. If contact with eyes should occur, flush with water for 15 minutes and seek immediate medical attention.