Quick loading® The special splicing adhesive for assembled wind power is a high thixotropic and high-strength adhesive of epoxy resin modified by two components A and B, which is consisted of a variety of organic and inorganic modified materials. It is specially used for the assembly of concrete tower of onshore wind turbine with post tensioning method and bonding prestress.
GENERAL
Quick loading® The special splicing adhesive for assembled wind power is a high thixotropic and high-strength adhesive of epoxy resin modified by two components A and B, which is consisted of a variety of organic and inorganic modified materials. It is specially used for the assembly of concrete tower of onshore wind turbine with post tensioning method and bonding prestress.
FEATURE
Product features
◆High strength, high elastic modulus, low creep, waterproof and anti-corrosion.
◆High thixotropic paste, self-lubricating, easy to stir and apply, no sagging and dripping.
◆It is easy to compact, the glue joint has no water seepage, it has a strong bonding ability with concrete, the reinforcement does not rust, and can effectively transfer the load.
◆Good weather resistance, less affected by construction climate conditions, construction on wet surface and at low temperature, and stronger adhesion under dry conditions.
◆The gluing can be operated for a long time, but it solidifies rapidly and the strength develops rapidly, which basically does not affect the prestressed tension
◆Safe and non-toxic.
PERFORMANCE
Performance T/CECS 10080-2020 Epoxy Adhesive for Precast Segment Assembly
| Serial number | Testing items | Technical requirement | |
| 1 | colour | After curing, it is similar to the surface color of segmental concrete | |
| 2 | Sizing time / min | ≥20 | |
| 3 | Bonding time / min | ≥60 | |
| 4 | Anti sagging performance / mm | ≥10 | |
| 5 | Extrudability/mm2 | 150N | ≥3000 |
| 2000N | ≥7500 | ||
| 4000N | ≥10000 | ||
| 6 | Shrinkage /% | ≤0.1 | |
| 7 | 7Thermal deformation temperature / ℃ | ≥50 | |
| 8 | Water absorption /% | ≤0.5 | |
| 9 | Dissolution rate in water /% | ≤0.1 | |
| 10 | Nonvolatile content /% | ≥ 99 | |
| 11 | Compressive strength/MPa | 12h | ≥ 20 |
| 24h | ≥ 60 | ||
| 7d | ≥ 80 | ||
| 12 | Compressive modulus of elasticity/MPa | instantaneous | ≥ 8000 |
| Delay (1H) | ≥ 6000 | ||
| 13 | Bond bending behavior of concrete and concret | Concrete body failure | |
| 14 | Compressive shear strength of concrete and concrete / MPa | ≥14 | |
| 15 | Steel to steel tensile shear strength / MPa | ≥17 | |
| 16 | Normal tensile bond strength of steel to concrete / MPa | ≥ 3.0, and the concrete body is damaged | |
| 17 | Damp heat aging resistance | Concrete body failure | |
| 18 | Freeze thaw cycle resistance a | Concrete body failure | |
| 19 | Fatigue stress resistance b / 2 million times | The test piece is not damaged | |
| 20 | twentyLong term stress resistance c | The steel does not damage the steel tensile shear specimen, and the creep deformation value is less than 0.4mm | |
| 21 | Alkali resistant medium | Concrete body failure | |
| Acid resistant medium | |||
| Salt spray resistance | |||
| 22 | The products shall be manufactured according to the applicable construction siteTemperature (T) | K1 type | I. 10 ℃ ≤ T < 5 ℃ |
| K2 type | (5℃≤T<20℃) | ||
| K3 type | 15℃≤T<30℃ | ||
| K4 type | 25℃≤T<40℃ | ||
Scope of application
◆Vertical joint splicing of prefabricated segments of prestressed concrete tower of wind turbine
◆Horizontal joint splicing of prestressed concrete tower of wind turbine
Construction process
I. Preparation before assembly of precast segments
1. Confirm that the dimensional deviation of each part of the precast segment meets the design requirements;
2. All parts should be cleaned with compressed air;
3. Splicing glue and tools shall be fully prepared.
II. Trial assembly and adjustment of precast segments
1. Carry out preliminary alignment first, and then carry out fine adjustment with the instrument;
2. After the trial assembly meets the requirements, visually check the width of the assembly gap to control the glue application thickness of different parts;
3. After locking the assembly angle, move the lifting block about 30-50cm for gluing.
III. Mixing splicing adhesive
1. Estimate the gluing amount according to the area of splicing contact surface;
⒉ Weigh components A and B according to the recommended mixing proportion;
3. Stir in a clean container with a rubber mixer until the color is completely uniform.
IV. Gluing on the surface of precast segment splicing surface
1. Use a scraper to scrape the splicing glue on the two splicing surfaces at the same time, the thickness shall be controlled at 1-2mm, and the parts with wide gap in the trial splicing can be coated more appropriately;
⒉When applying scraping glue, it shall be up and down first, in the same direction and evenly applied;
3. The coating and scraping of the splicing surface should be completed within 45 minutes.
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