Concrete Repair & Strengthening Systems
KingInject 80PU1®
Polyurethane resin based injection system.
Viscosity
60 – 120 mPa.s @ 25ºC
Packaging
Pack
Overview
KingInject 80PU1 is a two-component; low viscosity moisture reactive polyurethane system which when reacts with water and expands to form a closed-cell foam barrier. KingInject 80PU1 is used in conjunction with KingInject 80PU2 for permanent and effective sealing of live cracks.
Applications
- For injection of wet cracks in all types of structural concrete elements, masonry, and brickwork
Advantages
- Excellent bond strength to concrete, brickwork, and masonry
- Low viscosity polyurethane system, formulated to allow cracks penetration
- Rapid reaction with water; will stop water leakage problems
- Outstanding resistance to hydrostatic pressure
- Used with KingInject 80PU1 120 to form a permanently elastic seal
- Exhibit good chemical resistance
- Non-toxic, suitable for use in contact with potable water
- STANDARDS KingInject 80PU1 is suitable for use in contact with potable water when tested in accordance with BS 6920
Technical Properties
| Property | Value | Standard |
|---|---|---|
| Reaction time with water | Between 5 – 30 sec @ 25ºC | — |
| Mixed density | 1.120 ± 0.05 g/cm³ @ 25ºC | — |
| Viscosity | 60 – 120 mPa.s @ 25ºC | — |
| Pot life in absence of water | 3 – 4 hr @ 25ºC 2 – 3 hr @ 40ºC INJECTION HOLES DRILLING & FIXING Holes are drilled to install mechanical packers. Always try to allocate steel re-bars and conduit before drilling. Using a high-quality rotary hammer drill, and depending on packer diameter used, a suitable drill pit used, usually 13 mm or 16 mm diameter mechanical packers are used. The angle which drilling should be is 45⁰C or less to the surface and toward the crack. Depth of the drill holes intersecting the crack should be somewhat close to the middle of the structure, if possible. Holes greater than 45 cm are not required even if the concrete being repaired is more than 90 cm thick. Holes should always be staggered from one side of the cracks to the other. | — |
| Spacing | distance between drilled holes usually varies from approximately 15 – 50 cm according to the width of the cracks (30 cm is commonly used). Yet the wider the cracks, the further apart are drill holes. | — |
Usage & Packaging
Packaging
KingInject 80PU1 is available in 1.1 kg (1 litre) and 5.5 kg (5 litre) packs.
Storage
Shelf life is 1 year when stored under cover, out of direct sunlight and protected from extremes of temperature
Pack formats
Pack