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RANGE OF APPLICATION
- Stop water infiltration
- Sealing joints
- Sealing of pipe joints through commercial packer equipment for repairing leakages in sanitary
and storm sewer pipes
- Pipe Intrusions
- Sewers, Manholes, Utility Boxes
- Tunnels, Dams
- Soil Stabilization
TYPE OF MATERIAL
WEBAC FLEXGEL is a single component hydrophilic polyurethane grout. Underwriter's Laboratories , Inc. has tested WEBAC Corp. Flexgel2 in accordance with NSF standard 61, and has approved this material for contact with potable water at a maximum use level of 15cm2/liter.
The product cures to a closed cell foam or an elastomeric gel when it comes in contact with water. The product is capable of incorporating large amounts of water that are multiples of its own mass, thereby forming a gel. The cure time of the product is determined by the amount of water added and the temperature.
While reacting to a foam the material expands its volume. The cured material is flexible. Since water is a component of the cured product structure, the material can be effected by wet and dry cycles. The reacted material may shrink and swell as a result of the surrounding moisture content.
The capability of the cured product to swell and increase in volume due to water absorption is one of the important features that discriminate hydrophilic grouts from their hydrophobic counterparts.
WEBAC Flexgel is designed as a single component material. In certain applications an accelerator may be added to decrease gel-time.
PROCESSING
WEBAC FLEXGEL is cured upon reaction with water. Large quantities of water can be absorbed in the reaction mass, and the properties of the cured product are determined by the mix ratio.
Mixing WEBAC FLEXGEL with water at a 1:1 to 1:3 volume basis will result in a foam with good tear resistance.
In the range of 1:4 to 1:15 a gel is obtained. Lower water ratios result in a strong gel of a light cellular structure. The more water is added the gel gradually softens and the cellular appearance changes towards a monolithic structure. The gel time is about 100 seconds varying with temperature and water saturation. Single component injection equipment may be used to achieve certain results. Hydrophilic grouts can absorb large amounts of water and simultaneous injection of water might be recommended in applications where gelling of the grout is desired. Two component equipment can may utilized to achieve a certain mixing ratio such as needed for commercial sewer repair. The grout can be applied much in the same manner as acrylamide grout with the advantage of having superior strength and safety features.
For 'curtain injection' behind below grade structures it is recommended to drill through the structure in a pattern that is determined by the physical properties of the soil. To create a standard pattern holes are drilled 50 cm (two feet) apart from each other in a horizontal line.
The next step is to drill holes in a line 50 cm above the first line in the same fashion but staggered. Recommended packers are WEBAC 19-150 buttonhead type. Smaller packers like the 1/2" 13-60s type may be sufficiant in some lower volume applications
Injection should begin at the highest point. Each packer should be injected until material penetrates the surrounding drill holes (open packers). After injection is complete packers should be removed and drill holes be filled with a cementitious grout.
It is essential for all equipment that comes in contact with the grout to be dry. If reaction of the batch occurs while pumping, immediately shut down the machine and flush with a cleaner to avoid built up and clogging of the equipment. Observe temperature and humidity of the environment, since both determine the pot-life of the batch.
MAINTENANCE OF EQUIPMENT
Remove all excess sealant and any smears. Tools and mixing equipment are best cleaned immediately after use. Recommended: R70 Pump Flush is a solvent free, non-flammable and for shipping as non-hazardous classified cleaner, which conditions your pump and hoses. Circulate cleaner through pump for several minutes.
Xylol, Toluol, Acetone, M.E.K. and related solvents can be used for initial flushing. Solvents are hazardous, are aggressive towards plastic and rubber and might be in conflict with regulations on the jobsite. Caution! Some cleaners are combustible.
PRECAUTION
Protect your health! While working with WEBAC materials, safety goggles, gloves and safety clothing must be worn at all times. While injecting, a full face shield is strongly recommended. Spills and blow-outs do happen! Protect yourself and others on the jobsite. Consider property in proximity of the application area to prevent loss or damage. Protect your jobsite from unauthorized persons. Store all materials and equipment safely and out of reach of children!
Observe container labels, MSDS, and instructions in the WEBAC Product Catalog before using the product and equipment. In case one of the components comes in contact with the skin, wash thoroughly with soap and water. Provide adequate ventilation in volume and pattern in working area. Further protection: emergency showers and eyewash stations.
Fulfills the requirements of the KTW recommendations for large- and small-surface sealings (D1 + D2) in contact with potable water(test certificate). Fulfills the requirements of ground water hygiene for large- and small-surface sealings (D1 + D2)(test certificate)Suitability test according to the requirements specified in the gel injection guideline 804.6102(former 835.9201) of the DB AG
TECHNICAL DATA
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