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PU(300)
DESCRIPTION: AT-PU300 is a hydrophobic polyurethane based foam resin used for injection into concrete structures exhibiting water egress. AT-PU300 is a single component hydrophobic resin that reacts to form a closed cell, semi-rigid, non corrosive foam when it comes in contact with water. A catalyst/accelerator is separately required to be added to control the foaming time to effectively counter active or gushing water leakages. USES:
- AT-PU200 is used to stop water leakages through concrete structures such as basement retaining walls, shafts/tunnels, water supply facilities, tanks, cooling towers, sewage treatment plants, podium slabs, lift/elevator wells, construction joints. SW-PU300 is injected using appropriate high pressure injection equipment from the “negative side”.
ADVANTAGES:
- Non corrosive
INJECTION PROCESS:
- Identify the area to be injected. Install injection packers of suitable diameter and length. Ensure injection packers are tightly installed to avoid packer failure during injection process. If required, seal packers using quick setting cement based putty. Mix the two components, resin and catalyst in the required ratio and feed into the pump and commence injection. Injection pressure shall be governed by the type of element, packer spacing and other factors. For injection below raft slab, grade slab, inject in intermittent batches and observe effect. Avoid large volume injections in short period.
TECHNICAL DATA:
| MATERIAL DESCRIPTION | COMPONENT A – Solvent Free hydrophobic polyurethane injection form resin. COMPONENT B – Catalyst / Accelerator additive to initiate and/or accelerate foaming action |
| APPEARANCE | COMPONENT A – Dark brown liquid COMPONENT B – Light Ivory Liquid |
| VISCOCITY | COMPONENT A ~ 135.0 mPa.s (@ 23ºC) COMPONENT B ~ 50.0 mPa.s (@ 23ºC) |
| DENSITY | COMPONENT A ~ 1.17 g/cm³ COMPONENT B ~ |
| MIXING RATIO | COMPONENT A ~ 10 parts by volume COMPONENT B ~ 1 part by volume Mixing ratio can be varied from 10 : 0.5 ~ 10: 1.5 parts by volume depending on water leakage |
| VOLUME EXPANSION | Up to 20 times (unconfined condition with mixing ratio of 10:1) |
| REACTION TIME | 10 ~ 300 seconds (depending on temperature and mixing ratio) |
| POT LIFE | Up to 2.0 hrs (surface film that forms upon humidity contact to be discarded and not mixed in) |
| APPLICATION TEMPREATURE | › 5ºC (substrate temperature during injection) |
| APPLICATION EQUIPEMENT | Suitable single or two component positive displacement resin injection pump capable of developing required injection pressures. Non-return injection packers. |
PACKAGING & STORAGE:
- AT-PU300 is available in the following pack:
- Component A 20 kg & Component B 2 kg
- Shelf life is 6 months in sealed containers as provided
- Keep containers sealed and away from heat and cold in a well ventilated area (5ºC to 30ºC)
HEALTH & SAFETY:
- Protect hands with rubber gloves and eyes with goggles.
- Accidental splashes to the skin or eyes must be rinsed immediately with clean water.
- Store in well-labeled containers.