WO1995008679A1

WO1995008679A1 - Process for damp-proofing masonry

Info

Publication number: WO1995008679A1
Application number: PCT/DE1994/001021
Authority: WO
Inventors: Jürgen Dreyer; Horst Becker
Original assignee: Isotec Franchise-Systeme Gmbh
Priority date: 1993-09-23
Filing date: 1994-09-02
Publication date: 1995-03-30
Also published as: DE59407814D1; PL313614A1; CZ286175B6; EP0721536B1; ES2129667T3; HU9600705D0; CZ82796A3; GR3029974T3; HU214562B; PL175909B1; RU2109885C1; ATE176698T1; DE4332272A1; DE4332272C2; HUT74284A; DK0721536T3; EP0721536A1

Abstract

In order to damp-proof damp masonry (12) with the aid of paraffin injections acting as a damp course, it is proposed that a heated tank acting on the underpressure principle as a container for the liquid paraffin (2). It is thus possible to prevent further liquid paraffin (2) from escaping from the blind holes (11) made in the masonry (12) for injection purposes. Prior drying of the masonry (12) can also be obviated by the simultaneous heating of the paraffin (2) in the blind hole (11).

Description

Process for renovating damp masonry

The invention relates to a method for renovating damp masonry by creating a moisture barrier in the masonry, which consists of a hydrophobic mass, in particular paraffin, which is introduced into the blind holes formed in the masonry and heated there.

In addition, the invention relates to a device for performing this method.

A generic renovation method is known for example from the patent specification DD 280 346 AI. There, a wax granulate is filled into the boreholes and melted over a rod-shaped heater, the borehole being sealed off from the outside. The sealing is intended to increase the pressure in the melted wax and thus to achieve an improved penetration process for the masonry.

In other known renovation methods, in which a hydrophobic casting compound is injected into the moist masonry, the masonry is at least partially dried out beforehand by heating rods, the wax to be introduced subsequently being introduced into the boreholes under pressure or without pressure.

However, there is always the problem that the blind hole must be sealed to the outside so that no excess paraffin can escape on the outer surface of the wall. The invention has for its object to provide a method for renovating damp masonry, in which the blind hole in the masonry can be filled with paraffin without liquid paraffin can escape on the outside of the wall.

This object is achieved in that the hydrophobic mass is liquidly removed from a storage container working according to the vacuum principle by means of a feed line which can be inserted into the blind hole.

In the method according to the invention, the melted paraffin is therefore in a storage container which is pressure-tight and from which the melted paraffin can flow out of the storage container by means of a supply line according to the vacuum principle.

The term "vacuum principle" will be explained in the following. The storage container, which contains liquid paraffin, is in the position of use above a borehole that is to be filled with liquid paraffin. Now the paraffin is introduced into the blind hole through the feed line inserted into the blind hole to a level at which the open end of the feed line is reached by the paraffin mirror in the obliquely downwardly inclined blind hole and thus prevents air from being drawn against the outflowing paraffin can flow into the reservoir.

In this way, a negative pressure is generated in the storage container, which prevents further escape of paraffin. If the liquid paraffin in the blind hole penetrates into the pores and capillaries of the masonry, ie the paraffin level in the borehole drops, the opening of the feed line is released and outside air can enter the interior of the storage container. As a result, a certain amount of paraffin flows into the borehole, so that the paraffin level rises again and closes the opening of the feed line. This The process repeats itself automatically until no paraffin penetrates the surrounding masonry and a dense moisture barrier has been created from paraffin.

In practice, there are a number of boreholes at the same distance from one another in the masonry to be renovated, so that, in the sense of the invention, the corresponding reservoir as an elongated container with several feed lines, each of which is inserted into the blind holes, ver - can be used.

With the method according to the invention it is very easily possible to forego pre-drying of the masonry. The intended heating of the paraffin in the blind hole z. B. to approx. 150 ° C, the moisture evaporates at the phase boundary of liquid paraffin water, so that the moisture is present in the pores of the wall in a gaseous and thus compressible state. Due to the capillary forces of the masonry, the liquid paraffin penetrates into the vicinity of the blind hole, displacing the moisture, and finally fills the entire masonry at a blind hole height with a paraffin barrier.

The evaporation of moisture removes a relatively large amount of heat from the liquid paraffin in the blind hole area due to the phase change, so that the paraffin would solidify relatively quickly in the blind hole without additional heating or a complete penetration of the masonry would not be possible. The heating introduced into the borehole, however, prevents premature solidification of the paraffin.

The storage container is preferably heated so that the paraffin running out into the borehole already has a comparatively thin consistency and cannot solidify even during a long treatment period. Due to the heating introduced into the borehole, there is also no risk that the heating element will overheat, since the liquid paraffin provides good heat transfer between the heating and the masonry.

In the method described, local overheating in the masonry can no longer occur, as a result of which, for example in the case of the previously predrying, fires have occurred due to combustible wall components.

The heating element used for heating the paraffin in the borehole is preferably rod-shaped and is used at the same time for heating the storage container. The heating element can, for example, be guided pressure-tight directly through the interior of the storage container, on the other hand, a heating channel in the storage container is also possible, which is penetrated by the rod-shaped heating element.

By means of a heatable storage container, however, it is also possible according to the invention to dispense with a separate rod-shaped heater which is introduced into the blind hole. This can be done in that the feed line, which is inserted into the blind hole, from a good heat-conducting material such as. B. copper. In this case, the supply line itself serves as a heating element, which enables a sufficiently large heat transfer from the heated paraffin in the storage container to the paraffin in the blind hole.

In order to ensure the required heat transfer, the lower end of the feed line can be perforated, so that large heat transfer surfaces are available. Here, a paraffin level occurs in the blind hole, which extends to the upper end of the perforated area.

A device according to the invention for carrying out the method results directly from the description of the method according to the invention. The one based on the vacuum principle Working storage container, which is arranged in the position of use above the blind hole, preferably has an airtightly closable upper filling opening through which liquid or solid paraffin can be filled, for example. After the filling process has ended, the filling opening is closed in an airtight manner so that outside air can no longer get into the interior of the container through the filling opening.

The lower feed line preferably also has a shut-off element, so that liquid paraffin can no longer escape from the storage container when the injection process has ended and the supply container with its lower feed line is removed from the blind hole.

For heating the storage container or the paraffin in the blind hole, a rod-shaped heating element is preferably used, which passes through the storage container and dips with its lower end into the blind hole, which is partially filled with paraffin.

The storage container preferably has a filling level measuring device which indicates the respective filling level in the interior of the container. If the fill level is too low, this fill level measuring device can automatically switch off the heating element or be coupled to a refill container which automatically refills the reservoir when the fill level is too low. For this purpose, a circuit can be provided by means of which the shut-off element in the supply line is closed when the storage container is refilled and only opens again when a sufficient fill level is measured by the fill level measuring device.

In this way, automatic monitoring of the process is possible and the risk is eliminated that the heating element heats up to an unacceptably high level or the paraffin injections are interrupted at an early stage. The invention is illustrated in the drawing, for example, and is explained in detail below with reference to the drawing. Show it:

1 shows a schematic section through a storage container and masonry with a blind hole, a heating rod being used to heat the storage container and the paraffin in the blind hole, and

2 shows a section through a storage container and masonry with a blind hole, the storage container and the paraffin in the blind hole being heated by separate heating elements.

The reservoir 1 shown in FIG. 1 is filled with liquid paraffin 2 and is heated via a heating element 3, which passes through a bore 4 of the reservoir 1 with its upper part 5, so that the paraffin 2 does not penetrate inside the reservoir 1 can freeze.

Granular or liquid paraffin 2 can be refilled through an upper filler opening 6, which can be closed airtight with the aid of a locking member 7.

In the lower area of the storage container 1, a feed line 8 is arranged, which has an outlet opening 10 at its lower end 9 and can be inserted into a blind hole 11 which is introduced obliquely downwards into a masonry 12 in need of renovation. In the feed line 8, a further blocking member 13 is provided, which is open during operation so that liquid paraffin 2 can escape into the blind hole 11.

Due to the storage container 1 working according to the vacuum principle, however, liquid paraffin 2 only runs as long into the blind hole 11 until a paraffin mirror 14 is reached, through which the outlet opening 10 is closed. Because of the negative pressure building up in the upper region 15 of the storage container 1, no liquid paraffin 2 can flow into the blind hole 11 until the paraffin mirror 14 sinks below the outlet opening 10 and air can thus penetrate into the storage container 1.

The lower end 16 of the heating rod 3 is inserted into the blind hole 11 and heats the paraffin therein, so that it can compensate for the heat losses due to moisture evaporation taking place in the blind hole environment and intensive penetration of the masonry 12 is possible with paraffin.

In the embodiment according to FIG. 2, a separate heating element 17 is used to heat the paraffin in the blind hole 11, while a separate floor heating 18 is provided for heating the storage container 1.

Reference list

1 storage container

2 paraffin

3 heating element

4 hole

5 upper part

6 upper filling opening

7 blocking member

8 supply line

9 bottom end

10 outlet opening

11 blind hole

12 masonry

13 blocking member

14 paraffin mirrors

15 upper area

16 bottom end

17 radiators

18 floor heating

Claims

claims

1. A method for renovating damp masonry by creating a moisture barrier in the masonry, which consists of a hydrophobic mass, in particular paraffin, which is introduced into the blind holes formed in the masonry and heated there, characterized in that the hydrophobic mass (2) by means of a in the Blind hole (11) insertable feed line (8) is fluidly removed from a reservoir (1) working according to the vacuum principle.

2. The method of claim 1, d a d u r c h g e ¬ k e n n z e i c h n e t that the reservoir (1) is heated.

3. The method according to claim 2, that a rod-shaped heating element (3) is used to heat the paraffin (2) in the blind hole (11) and to heat the storage container (1).

4. The method of claim 2 or 3, d a d u r c h g e ¬ k e n n z e i c h n e t that the feed line (8) made of a good heat-conducting material such. B. copper with a perforated lower end, which end is used for heating the paraffin in the blind hole (11) (2).

5. Device for performing the method according to one of claims 1 to 4, characterized by a heatable, in the use position above the blind hole (11) arranged storage container (1) for a hydrophobic potting compound (2), with an air tightly closable upper filling opening (6) for the casting compound (2) and a lower feed line (8) which can be inserted into the blind hole (11).

6. The device according to claim 5, d a d u r c h g e ¬ k e n n z e i c h n e t that a shut-off device (13) is provided in the feed line (8).

7. Apparatus according to claim 5 or 6, d a d u r c h g e k e n n z e i c h n e t that for heating the

Storage container (1) and the potting compound (2) located in the blind hole (11) is provided with a heating rod (3) which can be inserted into the blind hole (11) with its lower end (16) and which has an upper part (5). heated the storage container (1).

8. Device according to one of claims 5 to 7, so that a level measuring device is provided in the reservoir (1).

9. Device according to one of claims 5 to 9, d a ¬ d u r c h g e k e n n z e i c h n e t that the storage container (1) is coupled to a refill container.

10. Apparatus according to claim 8 or 9, so that the level measuring device for switching off the heating element (3) is coupled to this or the refill container when the filling level is too low.