FI69497C - FOERFARANDE FOER ATT AOSTADKOMMA ISOLERING AV EN BYGGSKILJEVAEGG MOT FUKTIGHET - Google Patents

Description

! 69497

Method for providing insulation of a building wall against moisture - Förrarande för att Sstadkomma isolering av en byggskiljevägg mot fuktighet

The present invention relates to a method for providing insulation of a building wall against moisture, wherein the partition wall is dried by means of an electroosmotic installation and holes are formed, for example, by drilling in the area of an electrically generated field and water-repellent or hydrophobic material is fed into said holes.

Polish patent publication 103,633 discloses a method in which the wall drying process is started by means of an electroosmotic installation to dry the wall so that its moisture percentage is in the range of 1 to 8%. Further, holes are drilled in the area where the electric field effect occurs, which holes suitably form an angle of about 35 ° with the ground. A hydrophobic substance, which is also electrically neutral, is continuously fed into the holes. The poles of the electroosmotic device are then reversed.

In this case, a vacuum is applied to the capillaries as a result of the electroosmotic fluid movement towards the negative pole. The hydrophobic substance absorbed inside the wall then forms a barrier against moisture.

When using this method, the initial drying time is a period of several months to reach the required degree of drying.

In addition, the drying ability is reduced due to the presence of a permanent electric field which polarizes the electrodes and, moreover, promotes their corrosion. In addition, the static forces present severely limit the penetration range of the hydrophobic substance.

The main object of the present invention is therefore 2 69497 to provide a method of the type described above for solving said problems.

Said object is achieved by a method according to the invention, which is mainly characterized in that in order to generate said electric field, an average positive AC voltage is generated while the electroosmotic device is supplied, said field being generated so that the time effect of the positive pulse during wall drying and supply is 2 to 20 times longer than a negative pulse arranged so that it does not fall below 20 ms, whereby the alternating voltage arranges and dynamizes the water particles and the device electrodes depolarize.

The dynamic and pulse-like AC voltage effect significantly (a couple of times) increases the drying speed and drying efficiency, as well as increases the penetration area of the hydrophobic substance.

The method according to the present invention enables efficient drying of pores with small cross-sections.

Thanks to this solution, the electrical corrosion of the electrodes has also been reduced.

The object of the invention is illustrated in more detail in the following example by means of the accompanying drawing, in which:

Figure 1 shows a general diagram of a drying device.

Figure 2 shows the AC voltage flow.

The electroosmotic device is placed between the building wall and the ground surface 2 and the beam 3. A row of electrodes 4 is placed in the wall and ground electrodes 5 are dug in the ground, which 3 69497 are flat iron, rod or pipe. Through the electrical insulating pieces 6, electrical energy is supplied from the supply device 7 as a plus-average alternating voltage to the electrodes 4 and 5 for a certain time. The drying process continues until the moisture content of the wall has dropped to 10%.

Holes 8 are drilled between the electrode 4 and the ground to remove water, the holes being at an angle of about 30 ° to the ground. A hydrophobic (water-repellent) liquid, for example silicone resin, is fed into these holes 8. Simultaneously, an average positive AC voltage is applied to the electrodes 4 and 5 for a certain period of time, the time of the positive effect being 1 second and the time of the negative pulse effect being 200 ms. The period between the negative pulse and the subsequent positive pulse is also 200 ms. Thanks to the application of AC voltage to the electrode, the required degree of humidity is reached in about five times less time, depending on the thickness of the wall and the degree of initial humidity.

Claims (1)

A method for providing wall insulation of a building against moisture, wherein the wall is dried by means of an electroosmotic device and holes (8) are formed, for example by drilling in an electrically generated field and water-forced (hydrophobic) material is fed into said holes (8). generating a positive average alternating voltage for the time the electroosmotic device is applied, said field being generated such that the time effect of the positive pulse during which the wall (1) dries and feeds is 2 to 20 times longer than the negative pulse arranged as such, that it does not fall below 20 ms, whereby the AC voltage arranges and dynamizes the water particles and the device electrodes become depolarized.