Sikadur®-31 SBA S-02
Segmental bridge adhesive for use at +30 °C to +45 °C
Sikadur®-31 SBA S-02 is a 2-part epoxy based moisture tolerant, thixotropic, structural adhesive especially formulated for segmental bridge construction. It has good squeezability, high initial strength gain, hardens without shrinkage and complies with many international and national standards such as FIP, ASTM etc. Application temperature range +30 °C to +45 °C.
- Meets or exceeds International and National Standards (FIP, BS, ASTM etc.)
- Complies with both ASTM C-881 and AASHTO M-235 for Type VI
- Lubricates the surfaces and makes positioning of the shear keys easier
- High strength and high modulus of elasticity
- High initial and ultimate strengths
- Impermeable to liquids and water vapour
- Minimal water absorption
- Suitable for dry and damp concrete surfaces (moisture tolerant)
- Hardening is not affected by humidity
- Thixotropic: non-sag in vertical and overhead applications
- Hardens without shrinkage
- Different coloured components (for mixing control)
- No primer needed
Usage
- Provides a watertight joint between segments
- Lubricates the surfaces
- Transfers the loading stresses between segments
Advantages
- Meets or exceeds International and National Standards (FIP, BS, ASTM etc.)
- Complies with both ASTM C-881 and AASHTO M-235 for Type VI
- Lubricates the surfaces and makes positioning of the shear keys easier
- High strength and high modulus of elasticity
- High initial and ultimate strengths
- Impermeable to liquids and water vapour
- Minimal water absorption
- Suitable for dry and damp concrete surfaces (moisture tolerant)
- Hardening is not affected by humidity
- Thixotropic: non-sag in vertical and overhead applications
- Hardens without shrinkage
- Different coloured components (for mixing control)
- No primer needed
Packaging
| Parts A+B: 6 kg | Pre-batched unit |
| Pallets of 80 units |
Colour
| Part A | White |
| Part B | Black |
| Part A+B mixed | Concrete grey |
Product Details
APPROVALS / STANDARDS
- CE Marking and Declaration of Performance to EN 1504-4 - Structural bonding
Composition
Epoxy resin and selected fillers
Shelf Life
24 months from date of production
Storage Conditions
The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.
Density
Mixed resin ~1.80 ± 0.1 kg/l
Density value at +23 °C.
Product Declaration
- EN 1504-4: Structural bonding
- Declaration according to FIP / fib 9/2 Proposal for a standard for acceptance tests and verification of epoxy bonding agents for segmental construction
| FIP Performance / Characteristics | Requirements and Criteria |
| 5.1 Pot Life | ≥ 20 min at upper limit of temperature range |
| 5.2 Open Time | ≥ 60 min at upper limit of temperature range, concrete failure |
| 5.3 Thixotropy | Non sagging at 3 mm thickness |
| 5.4 Squeezability | with 15 kg load: ≥ 3 000 mm² with 200 kg load: ≥ 7 500 mm² with 400 kg load: ≥ 10 000 mm² |
| 5.5 Bondstrength on concrete | 100 % concrete failure |
| 5.6 Curing rate | Compressive strength 12 hours: ≥ 20 N/mm² |
| 5.7 Shrinkage | ≤ 0.4 % after 7 days |
| 5.8 Creep | Deferred modulus in compression: after 1 hour: ≥ 6 000 N/mm² Deferred modulus in shear: after 1 hour: ≥ 1 200 N/mm² |
| 5.9 Water absorption | Water absorption ≤ 0.5 % Solvability ≤ 0.1 % |
| 5.10 Heat resistance | ≥ 50 °C |
| 5.11 Colour | Same as concrete |
| 5.12 Compressive strength | At lower temperature limit after 24 hours: ≥ 60 N/mm² |
| 5.13 E-Modulus Compressive | ≥ 8 000 N/mm² |
| 5.14 Tensile bending | 100 % concrete failure |
| 5.15 Shearstrength | ≥ 12 N/mm² |
| 5.16 E-Modulus Shear | ≥ 1500 N/mm² |
System Structure
A full range of Sikadur®-31 SBA segmental bridge epoxy adhesives covering application temperatures between +5 °C and +60 °C is available:
| Application Temperature | Segmental Bridge Adhesive |
| +40 °C to +60 °C | Sikadur®-31 SBA S-08 |
| +30 °C to +45 °C | Sikadur®-31 SBA S-02 |
| +20 °C to +35 °C | Sikadur®-31 SBA S-03 |
| +10 °C to +25 °C | Sikadur®-31 SBA S-04 |
| +5 °C to +10 °C | Sikadur®-31 SBA S-07 |
Compressive Strength
| Curing time | Curing temperature | Compressive strength |
| 24 hours | +10 °C | > 45 N/mm² |
| 24 hours | +15 °C | > 60 N/mm² |
| 24 hours | +20 °C | ~68 N/mm² |
| 24 hours | +25 °C | ~78 N/mm² |
| 24 hours | +30 °C | ~78 N/mm² |
Modulus of Elasticity in Compression
| ~10 000 N/mm² (Instantaneous Modulus) | (EN 13412) (FIP 5.13) |
Tensile Adhesion Strength
| Bond strength on dry concrete | 100 % concrete failure |
| Bond strength on wet concrete | 100 % concrete failure |
| Tensile bending on dry concrete | 100 % concrete failure |
| Tensile bending on wet concrete | 100 % concrete failure |
Shear Strength
| Temperature | Shear strength1 |
| +40 °C | > 15 N/mm² |
| +45 °C | ~15 N/mm² |
| +50 °C | ~14 N/mm² |
1 Slant shear cylinder test
Modulus of Elasticity in Shear
| ~4 500 N/mm² | (Instantaneous Modulus) |
Shrinkage
Hardens without shrinkage
| ~0.04 % (after 7 days) | (FIP 5.7) |
Creep
| Deferred modulus in compression (1 hour) | ~9 500 N/mm² |
| Deferred modulus in shear (1 hour) | ~2 100 N/mm² |
Temperature Resistance
Meets the requirements of FIP 5.10, DIN 53458 and ASTM D648.
| Curing Conditions | Heat Resistance |
| +35 °C | +58 °C |
| +40 °C | +64 °C |
Heat Deflection Temperature
| Curing conditions | HDT |
| 7 days / +40 °C | +64 °C (Martens point) |
| 7 days / +55 °C | +58 °C |
Water Absorption
| Water absorption | ~0.23 % |
| Solvability | ~ –0.13 % |
Application
Mixing Ratio
Part A : Part B = 3 : 1 by weight or volume
Layer Thickness
30 mm max.
Sag Flow
| Flow at 9.5 mm | (ASTM D2730) (EN 1799) |
| Up to 9 mm (Thixotropy) | (FIP 5.3) |
Squeezability
| Squeeze load | Squeeze area |
| 15 kg | ~5 400 mm² |
| 200 kg | ~7 800 mm² |
Product Temperature
+5 °C min. / +30 °C max.
Ambient Air Temperature
+30 °C min. / +45 °C max.
Dew Point
Beware of condensation.
Substrate temperature during application must be at least 3 °C above dew point.
Substrate Temperature
+30 °C min. / +45 °C max.
Substrate Moisture Content
When applied to matt damp concrete brush the adhesive well into substrate.
Pot Life
Quantity: 1 litre (~1,8 kg)
| Temperature | Pot Life |
| +20 °C | > 50 minutes |
| +25 °C | ~50 minutes |
| +30 °C | ~30 minutes |
| +35 °C | ~20 minutes |
| +40 °C | ~15 minutes |
The pot life starts when the resin and hardener are mixed. It is shorter at high temperatures and longer at low temperatures. The larger the quantity mixed, the shorter the pot life.
Open Time
| Temperature | Open time |
| +30 °C | > 60 minutes |
| +35 °C | ~50 minutes |
| +40 °C | ~45 minutes |
Curing Rate
| Time | Compressive Strength |
| 12 hours | ~60 N/mm² |
| 24 hours | ~70 N/mm² |
| 7 days | ~80 N/mm² |
All values at +30 °C
SUBSTRATE QUALITY
Concrete must be at least 28 days old (and have an open textured profile. Any cement laitance shall be removed.
Concrete surfaces must be clean, dry or matt damp. Free from standing water, ice, dirt, oil, grease, laitance, surface treatments, all loose particles and any other surface contaminants that could affect adhesion of the adhesive.
SUBSTRATE PREPARATION
Concrete surfaces must be prepared mechanically using suitable abrasive blast cleaning or other suitable approved equipment to achieve an open textured, laitance free, gripping surface profile. All dust and loose material must be completely removed from surfaces before application of the adhesive.
MIXING
Prior to mixing all parts, mix part A (resin) briefly using a mixing spindle attached to a slow speed electric drill (max. 300 rpm). Add part B (hardener) to part A and mix parts A+B continuously for at least 3 minutes until a uniformly coloured smooth consistency mix has been achieved. To ensure thorough mixing pour materials into a clean container and mix again for approximately 1 minute. Over mixing must be avoided to minimise air entrainment. Mix full units only. Mixing time for A+B = 4.0 minutes. Mix only the quantity which can be used within its pot life.
CLEANING OF TOOLS
Clean all tools and application equipment with Sika® Colma Cleaner immediately after use. Hardened can only be mechanically removed.