Can You Shoot Up Crack Resin Pipe

Turn the pump pressure all the way down. Squirt some resin into a cup to make sure the resin is clean. Start at the lowest port and slowly crack the valve. This is a two man job (unless it is a small job). Have your partner slowly turn up the pressure as needed. Develop hand signals if the jobsite is noisy from a generator.

If I am on the valve, I will tell the pump operator how high to turn up the pressure. I will close the valve while this is being done. Once the pressure is up, I will control the flow of the resin from the valve. Very slowly cracking it open. This way, if I feel a shear start to form, I have a split second to close the valve.

Can You Shoot Up Crack Resin Pipe

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When to stop? My rule is this - if resin is flowing, keep pumping. What if it starts to run out the face of the crack? Again, my rule is this - if more resin is going in than is coming out, keep pumping. You only have a few minutes to get the resin where it needs to be. As the AP Seal 500 reacts with water it starts to thicken up and becomes more difficult to push into the tighter recesses of the crack.

If raw resin comes out of the crack (amber resin, not a white foam), then it is time to stop. This resin will seal the crack, but at this point there is not much water for it to react with and it will cure slowly. Stop injecting and move to the next port because it will be slow to seal. It is better to see white foam coming out the face of the crack.

What happens if the foam travels past the next port - should I stop? No way. This is a home run. In most cases, the further along the face of the crack the resin travels, the deeper it is travelling as well. This gives you a better seal.

(c) Pure resin from crack/joint If the joint surface exhibits immediate free flow of resin while working the first packer, pause for a few minutes. In most cases the resin will react fast enough with the water and expand rapidly. The resulting resin product will heal the joint and provide a surface seal to contain the material to follow.

The contractor is responsible for estimating what duration time is adequate for grouting the voids and is responsible to prove that the void is full by attempting to inject each port to refusal. Once the contractor is assured that the resin has reached the next injection packer or has sufficiently stopped the water as evidenced by the grout oozing out of the joint area, he should shut off the resin flow and disconnect pump pressure line and proceed to the next packer. Follow the injection process for one to three packers, the contractor shall return to the first packer and attempt to re-inject it again. Some of the packers will take more grout, filling up more of the crack/joint area and creating a higher density void filler and water stop. The contractor shall continue this procedure until refusal.

SealBoss 1510/1570 Water-Stop and the 1400 Line LV-Resin Line have been designed for leakage repair in problem areas such as expanding and contracting cracks, expansion joints and cold joints. Polyurethane resins form a flexible gasket in the defective concrete, thus stopping the leak and tolerating movement of the structure.Very fine cracks may require very low viscosity non-foaming polyurethanes such as SealBoss 1430.

Semi-flexible and flexible sealants are usually the best solution for crack and joint related problems. Nevertheless there are conditions where structural repair is necessary and specified. Structural strength is achieved by using 4040 and 4000 epoxy injection resins. Due to the unique properties of the epoxy injection resins, it is possible to inject this resin deeply into concrete joints, hairline cracks and fissures.

It is a myth that pressures of 300 psi are sufficient to do every job. In wide cracks and joints, pressures up to 300 psi may be enough to keep the material moving, however almost every hairline crack injection requires pressures of 1000 psi or more to produce satisfactory resin flow and adequate penetration.

In order to inject the resin into the crack, it is necessary to install injection ports, also called mechanical packers or just packers. While it is common to use surface injection ports for some low pressure epoxy injection in dry areas, it is recommended to use packers for polyurethane injection and high pressure epoxy injection. Surface ports will not stick to wet surfaces and they do not tolerate high injection pressures. Quite the opposite is true with mechanical packers. The metal-rubber type packers are made for pressures up to 5000 psi in wet and dry structures.

In some circumstances, it can be very useful to flush the crack with water to improve the subsequent penetration of the injection resin into thicker walls. Flushing helps to detect blind drill holes, or lost continuity of a crack. The procedure starts at the lowest packer on a vertical crack, or at the narrowest part of a crack of a horizontal surface and proceeds from packer to packer in sequence. During flushing, it is advisable to disconnect zerk fittings from packers that are not connected to the pressure line and thereby creating an exit for surplus liquid. After completion of flushing, prepare for the resin injection. Flushing is not advisable for epoxy injection.

When all preparation work is completed, make sure the injection pump is in good working order. All equipment that comes in contact with the chemicals must be absolutely dry. Always remember that polyurethanes are water reactive. This will save a lot of valuable time on the job. Choose the proper resin for the correct application. The nature of the crack/joint and the conditions at the job site determine the choice of material.

Holding the pressure line allows the operator to feel the pump pulsations. The technician may tell from the hose vibration how well the material is flowing into the crack. If a pressure gauge is available, the pressure should be monitored and kept in a range that is just enough to allow sufficient flow of material. This procedure helps to minimize unforeseen events like sudden spills of material, blown out ports or spalling of defective concrete. If the crack surface exhibits immediate free flow of resin while working the first packer, pause for a few minutes. In most cases the foam (1510 or 1570) will react fast enough with the water and expand rapidly. The resulting resin product will heal the crack and provide a surface seal to contain the material to follow. After approximately three to five minutes start pumping again.

If the resin continuous to flow freely out of the crack , stop pumping and apply a surface seal over the crack with rapid setting cement or place absorbent materials such as oakum or foam rubber soaked in the reactive grout until saturated. Use a screwdriver or similar to jam the soaked material into place and allow a few minutes to cure and pump again. When the soaked material comes in contact with water it starts to expand, creating a fast, permanent surface seal. Resin may still flow from pinholes in the patch, but do not be concerned as long as the majority of the resin is contained. A small amount of leakage is beneficial because it shows the extent of resin travel.

Extremely wide cracks should be covered with a surface seal prior to injection in order to contain the resin until cured. Under proper pumping conditions in active leak injection, the following signs should be observed in the order listed:

Occasionally applicators object to the loss of some resin from the crack as an unnecessary expense. Remember, however, that a little resin lost is a good insurance that the crack is well filled and a job is well done.

Once the injection work is completed, a good and thorough cleanup is essential, because once the resin hardens, it is almost impossible to dissolve it. Any resin spilled must be cleaned immediately before the resin sets. Clean your injection pump, mixers and any other tools that came in contact with the product thoroughly using SealBoss R70 Cleaner / Pump Flush or a solvent. Please observe data sheets for details and warnings. A good thorough cleanup is time well spent, and will save you a lot of grief on your next project. The packers can usually be removed within 24 hours and the holes should be patched. If desired, an electric grinder can be used to remove excess cured grout that flowed out the crack.

If a leak flows are at a very high rate, one or more pieces of small diameter pipe may be imbedded in the packing material. These diversion pipes serve to relieve pressure and divert flow while the packing seal solidifies. Once the seal has cured, a small amount of resin injected through the pipes will rapidly complete the seal. The pipe can then be removed.

The procedure for resin injection in expansion joints is similar to the procedure outlined for crack sealing. However, any pressures much above the minimum required to open injection packer valves, will rarely be needed. In fact, special care should be taken so as not to rupture the outer seal. Begin injection at the lowest packer, and work your way up. Best results are obtained by methodically proceeding to the end of the joint without unnecessary interruptions. Continuity helps to assure uniform density and continuity of SealBoss 1570 Foam. Continue to pump each packer, until resin flows from the packer ahead, before moving up. When the last packer has been pumped, go back to the first packer, and work through the series again, adding a small amount of resin at each. Watch your outer seal carefully. After curing overnight, the expansion joint is sealed and is ready for a long life of reliable service.

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DE NEEF Denepox I-40 is an ultra low viscosity, 100% solids, two component, moisture insensitive epoxy injection resin system designed specifically for gravity feeding or pressure injection of cracks. 2ff7e9595c