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Building structure water-tightness and waterproof covering recovery method
IPC classes for russian patent Building structure water-tightness and waterproof covering recovery method (RU 2282007):
E04G23/02 - Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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FIELD: building, particularly roof repair and waterproofing.

SUBSTANCE: method involves arranging roof paper between coating area to be repaired and movable heating member; heating organic binding material to soften thereof by means of the heating member; compacting the coating along with rolling-on roofing paper to heated coating.

EFFECT: increase service life of waterproof covering.

5 cl, 1 tbl

 

The invention relates to the construction and manufacture, and in particular to methods of repair of waterproofing and roofing containing organic binder (composition based on bitumen, tar and others).

The known method [1] repair of roofs, in which the defects is made by blending portions of the material from which made the old floor, or sticker new layers of roll roofing material in the repair of large sections of the roof, when the material is glued by applying hot or cold gluing mastic, followed by the layout of the rolled material and compacting.

The disadvantage of this method is that when gluing the new roofing material to the old not remedied the defects of the latter.

In the process of long-term atmospheric exposure (sunlight, severe temperature changes, frequent freezing and thawing of the roof and so on) is the embrittlement of the roofing material with the appearance of many cracks that remain in it and after bonding thereto of new material. As a result, old roofing material continues to "pop" (due to expansion cracks)that has a negative impact on pasted on the top floor. It cracks appear, and sometimes even partial peeling off of the new roofing. Introduced in n the PTO roofing material microcracks due to atmospheric effects begin to grow rapidly, which leads to water leakage coverage.

Studies have shown the longevity of the roof, renovated as described above, 1.5-2.4 times (depending on the state of the old coating is lower than the durability of the roof, on which is laid a single layer of the new roofing material.

The known method [2] defects waterproofing of structures, by which the heating of the waterproofing layer conduct electric current by passing it through a metal mesh pre layers of insulation. After melting and subsequent cooling of bitumen mastic defects, cracks, pores.

The main disadvantage of this method is the limitation of its use, due to the necessity of applying a conductive grid, which must be initially placed in the roof.

In addition, the method has some other drawbacks.

First, if necessary, to remedy the defect, for example, only one small area of the roof covering is warming up the entire area of coverage.

Secondly, due to the lack of surface insulation heating the coating is accompanied by a large heat loss, especially in the cold season, resulting in significant overhead electricity.

Thirdly, the presence of the s metal mesh hampers access to the base coating and the roof, what complicates carrying out various repair and maintenance, etc.

A prototype of the selected recovery method of waterproofing waterproofing of building structures [3] by heating to the softening of the organic binder recovered waterproofing coating laid on him roaming the heating element and seal coating. The temperature of the surface of the heating element exceeds 1.8-3.0 times the softening temperature of the organic binder, and seal coating is carried out at 0.15 to 0.5 MPa. Before you seal the softened organic binder level.

The disadvantage is chosen for the prototype of the method is that it does not provide uniform heating of the organic binder throughout the thickness. The upper layers of the organic binder, which are closer to the heating element, have much higher temperature and viscosity than the lower layers, resulting in the subsequent sealing of softened organic binder in roofing coating formed microcracks, which upon weathering rapidly deepening and expanding, thereby reducing the longevity of the restored coverage.

The technical problem of the invention was to increase the durability of Vosstania is by waterproofing coating.

The invention consists in the fact, that the way to restore waterproofing waterproofing of building structures, involving heating the organic binder cover until tender roaming through the heating element and the subsequent consolidation of the coating before heating the organic binder of the coating between the recovered area coverage and roaming the heating element is placed roofing cardboard, after heating are rolling roofing cardboard to the heated coating with simultaneous sealing cover.

In addition, before placing roofing cardboard between the recovered area coverage and roaming the heating element is carried out, pre-heating, levelling the softened organic binder and seal coating.

Before placing roofing cardboard between the recovered sections and movable element, roofing paper or recovered plot treated with surface-active substance. After rolling roofing cardboard to the heated coating with simultaneous sealing of the coating on the roofing paper is applied waterproofing layer is not less than 1 mm While heating the organic binder of the coating leads to a temperature 80-270�B0; With aged at this temperature for 4-20 minutes, and seal coating is performed with a force of 0.1 to 0.6 MPa.

Durable waterproofing of building structures recovered by the proposed method significantly exceeds the durability similar coverage recovered by a known method, chosen for the prototype. This effect is achieved due to the fact that in the restored coverage offered by the way there are no cracks, surface pores, and other similar defects, quickly progressing from the weather.

The proposed method is acceptable for recovery as thick coatings (up to six or more inflicted on each other layers), thin, including severely damaged and thinning in the upper layers to a thickness of less than 1 mm.

The recovery method of waterproofing waterproofing of building structures is as follows. On a clean dry surface plot of the old waterproofing roofing lay roofing paper (TU 57770-502-2002-843-71-8-94 LLC Quranically". Prior to the development of the proposed method roofing cardboard was used only as the basis of roofing material). On top roofing cardboard stack roaming heating element, such as a flexible unit's electric the element, and perform warm-up through the roof cardboard organic binder to a temperature of 80-270°aged at this temperature to 4-20 minutes if recovered waterproofing coating contains 1-2 layer, heating is carried out until the temperature of 80-90°aged 4-5 minutes as increasing the thickness of the recovered coating increase the temperature of heating and the time of exposure. If the restored floor contains, for example, six or more layers, the organic binder is heated to a temperature of 270°C and maintained at this temperature for 20 minutes After heating the organic binder recovered waterproofing coating to the desired temperature and holding at this temperature are rolling roofing cardboard heated to the floor with a simultaneous seal coating with a force of 0.1 to 0.6 MPa.

If the top layer of the multilayer recoverable cover badly damaged, depleted oil and is thinned to a thickness less than 1 mm, before placing roofing cardboard between the recovered area waterproofing coating, and a floating heating element carry out a preliminary heating of the organic binder to a temperature of 80-270°aged at this temperature for 4-20 minutes, levelling softened about the organic binder and seal coating with a force of 0.1 to 0.6 MPa. Then pre-heated and sealed floor lay roofing paper and move the heating element. Then perform the same operations with the same modes as described above.

If the upper layer is recovered waterproofing depleted bitumen before placing roofing cardboard between the recovered area coverage and roaming the heating element, roofing paper or recovery area coverage it is recommended to treat the surface-active substance. This intensifies the penetration of the bitumen and its components the bottom of the cover at the top and roofing paper.

If the top layer is recovered waterproofing coating layer surface-active agent contributes to reducing the exposure time temperature 4-20 minutes before 4-12 minutes for these purposes fit any powerhose-active substances, including oil, green oil and other. The choice of a particular powerhose-active substances for use in the proposed method depends solely on economic factors.

In addition, if the upper layer is recovered waterproofing strongly depleted bitumen and its components, after rolling roofing cardboard heated to the floor with od is vremennym seal coating on the roofing paper is applied waterproofing layer. The thickness of the waterproofing layer should be not less than 1 mm.

The results of comparative tests showed that physico-mechanical properties of the coating recovered by the proposed method far exceed the physical-mechanical properties of the coating, restored according to the method chosen for the prototype. The tests were carried out as follows. From the roof were taken four sample waterproofing after operating for five years. The samples were recovered by the proposed method and the method chosen for the prototype, and then was subjected to 10 cycles of aging, which corresponds to 5-8 years of operation on the roof. The aging of the recovered samples waterproofing was carried out according to the method described in GOST-73 "roll roofing Materials. Test methods on aging under the influence of climatic factors".

After aging the recovered samples waterproofing coatings were tested for breaking load (according to GOST 2678-94), water absorption (according to GOST 2678-94), heat resistance (according to GOST 2678-94), flexibility (according to GOST 2678-94) and fracture toughness ("the Method of determining the fracture toughness of waterproofing materials, developed by sue Rostov scientific research Institute of the Academy of municipal economy). The results are given in the table.

Table
Physico-mechanical properties of waterproofing coatings, recovered by the proposed method and the RF patent №2085676 after 10 cycles of aging.
  The breaking load, MPa Water absorption, % Heat Flexibility Crack resistance
A single layer of bituminous coating, recovered by the proposed method 24,4 3,0 passed passed passed
A single layer of bituminous coating, restored Pat. Of the Russian Federation No. 2085675 12,2 7,0 passed could not resist could not resist
Four-layer bituminous coating, recovered by the proposed method 35,4 6,3 passed passed passed
Four-layer bituminous coating recovered by U.S. Pat. Of the Russian Federation No. 285675 27,2 9,8 passed could not resist could not resist

Literature

1. Arievich AM and other residential buildings. - M.: stroiizdat, 1991, s.

2. Author svidetel is in the USSR # 62358, class E 04 B 1/64.

3. Patent RU 2085675, class E 04 D 5/02.

1. The recovery method of waterproofing waterproofing of building structures, involving heating the organic binder cover until tender roaming through the heating element and the subsequent seal coating, characterized in that before the heating of the organic binder of the coating between the recovered area coverage and roaming the heating element is placed roofing cardboard, after heating are rolling roofing cardboard to the heated coating with simultaneous sealing cover.

2. The method according to claim 1, characterized in that before placing a roofing cardboard between the recovered area coverage and roaming heating element carry out a preliminary warm-up, levelling the softened organic binder and seal coating.

3. The method according to claim 1, characterized in that before placing a roofing cardboard between the recovered area coverage and roaming heating element roofing cardboard or restored land cover is treated with a surface-active substance.

4. The method according to claim 1, characterized in that after rolling roofing cardboard to the heated coating with simultaneous sealing of the cover n the roofing paper is applied waterproofing layer, thickness of no less than 1 mm.

5. The method according to claim 1 or 2, characterized in that the heating of the organic binder of the coating leads to a temperature 80-270°aged at this temperature for 4-20 min, the seal coating is performed with a force of 0.1 to 0.6 MPa.

 
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