FRP connector is used for thermal insulation purpose in precast concrete industry, such as plant precast, site-cast tilt-up, and cast-in-place projects. Precast concrete sandwich wall is composed of inside layer, outside layer and thermal insulation layer. The FRP thermal insulation connector is used to connect the three layers. It can not only bear the weight of insulation and outside layer, but also bear wind load, earthquake and other loads.
1. Parameters of concrete insulation FRP connector:
| Series No. | Model No. | Specification (mm) | Thermal Layer Thickness (mm) | Outer Layer Thickness (mm) |
| 1 | 110/30 | 12x110 |
30 |
≥60 |
| 2 | 120/40 |
12x120 |
40 |
≥60 |
| 3 | 130/50 |
12x130 |
50 |
≥60 |
| 4 | 140/60 |
12x140 |
60 |
≥60 |
| 5 | 150/70 |
12x150 |
70 |
≥60 |
| 6 | 160/80 |
12x160 |
80 |
≥60 |
| 7 | 170/90 |
12x170 |
90 |
≥60 |
| 8 | 180/100 |
12x180 |
100 |
≥60 |
| 9 | 200/120 |
12x200 |
120 |
≥60 |
Other diameters such as 5mm, 11mm, 13mm, 14mm, 15mm are available.
2. Physical properties test results of sandwich panel FRP connector:
| Series No. | Testing Items | Unit | Test Result | Standard |
| 1 | Density | g/cm3 | 1.85-1.90 |
ASTM D792 |
| 2 | Water absorption | % | 0.57 |
ASTM D570 |
| 3 | Flexural strength | MPa | 302 |
ASTM D790 |
| 4 | Flexural modulus | GPa | 18.6 |
ASTM D790 |
| 5 | Tensile strength |
MPa |
210 |
ASTM D638 |
| 6 | Tensile modulus |
GPa |
22 |
ASTM D638 |
| 7 | Flame retardant rating |
|
V0/V1 | UL94 |
| 8 | Dielectric breakdown voltage | KV | 14.98 | ASTM D149-09 |
3. Product Photos of FRP concrete thermal insulation:
4. Application of FRP connector for precast concrete industry:
