Significance and features of injection formulations
The use of such techniques makes it possible to conduct waterproofing and strengthening( strengthening) of walls and walls very effectively by correcting the errors and defects( cracks, caverns, etc.) that have been made, the construction of new structures, the restoration of foundations and walls in old buildings,exposed to long-term exposure to a variety of external factors, and in other cases.
In the course of work, high-pressure pumps, special valve adapters, called packers, and working compounds pumped through the above equipment through prepared through holes of small diameter are used. Progressiveness of technologies is that they allow to carry out works with a high level of quality, elimination of the cause and the defect itself for the entire remaining life of the repaired structure.
Separately, it should be noted that the thoughtless use of injection techniques alone can not lead to successful repairs. The result can be achieved only through a complex combination of knowledge and competent engineering solutions in determining the causes of the defect being eradicated.
Also it is necessary to note the importance of the right choice of the necessary equipment and injection material, places of its injection. And, of course, one should strive for high qualification and performing skills of people directly performing all the stages of work.
Types of injection formulations
Two-component polyurethane resin is an excellent material for waterproofing works with foundations and foundations made of concrete. The property of the compositions to increase its volume by a factor of ten is successfully used to create a waterproof membrane that completely protects the part of the structure thus isolated from water.
Moreover, the resin penetrates and fills all voids, leaks and the channels of such injections themselves. Polymerizing( grasping), it is a single structure, strengthened by a general high strength and stable properties.
Polyurethane resin( one- and two-component) was one of the first injectable compounds to be used in waterproofing works. The first successful results gave impetus to the research, and polyacrylic compositions were effective and convenient for the same purposes.
And now for the qualitative isolation from groundwater the most effective are polyurethane and polyacrylic injection resins. Among the merits of these compounds, it is necessary to call the possibility to set and adjust the time of their polymerization. It can be changed by the executor if necessary, from seconds to hours.
Further developments led to the creation of special acrylate gels, multi-component formulations that allow even faster and more reliable removal of water in basements, underground tunnels, etc. Such gels are a real "remedy" for emergency facilities. Once used, such a facility provides further trouble-free operation for the entire lifetime of the facility.
How to use injection resins?
Like acrylic, polyester resin is successfully used for injection work. For machining, which mostly works on the repair plan, for example, gluing and pouring along the entire length and volume of cracks, voids, epoxy resin resins are more suitable.
Polymerizing, they form very rigid materials, with increased strength. Working compositions are applied on the basis of ordinary water, which provides the necessary high fluidity and adhesiveness of resins. Of the materials used for injection methods, ultrafine microcements are also used. They are fluid, they also apply when pouring cracks, voids around the reinforcing frame, which provides its enhanced protection against corrosion and other protection against water.
In order to carry out the described work, in general, it is necessary to do without special equipment( pump) capable of supplying materials in the area of injection under pressure to two hundred and fifty atmospheres. In addition, given that the cost of most compounds is high enough, serious engineering and technical research must be carried out before the work is done and the cause of the defect is correctly determined.
On the basis of such a study, a conclusion is made about the applied scheme of work and the arrangement of valve adapters. Otherwise, the result may not be the elimination of the defect, but the waste of materials and resources.
Among the most frequently encountered variants of practical application of injection resins, experts call the need to eliminate the influx of water under pressure, isolating system inputs into the basements of structures( power power lines, water pipes, drains, etc.), cellars and cellars, underground tunnels, various tanksand swimming pools, etc.