RU2645195C1 - Method for constructing the fireproof protective layer of roofing - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to the field of construction, in particular to a method for constructing a fireproof protective layer of roofing coatings. In the method for constructing a fireproof protective layer of roofing, in which, as a primer coating, a first layer of fireproof roofing mastic is applied over the roof covering, or waterproofing, or roofing covering, after hardening of the first layer, apply at least two layers of fireproof roofing mastic with a time of drying between their application. Fire protective roofing mastic contains the following ratio of components, wt %: chlorinated varnish based on polyolefins 40–80; incombustible fine-fiber natural mineral 20–60; surfactant 0.1–2.

EFFECT: technical result of the invention is an increase in the performance characteristics of coatings by increasing the fireproof properties, reducing the spread of fire.

7 cl

Description

The invention relates to the field of construction, in particular to a method for protecting roofing by means of fire belts and fire treatment of smoke removal hatches on a roofing, and can be used in the construction of structures, their repair and reconstruction to create a fire protective layer.

Waterproofing materials are applied under the roofing carpet to protect the attics from leaking. Often, the role of a waterproofing coating is played by a rolled waterproofing roofing material (for example, Technonikol CJSC, RU 2299226, 05.20.2007), it contains easily combustible bitumen and therefore, according to the federal law "Technical Regulation on Fire Safety Requirements" dated 07.22.2008 No. 123 -FZ it is necessary to carry out a list of fire safety measures.

A known method of creating a protective layer of roofing, in which a layer of hot bitumen mastic is applied to the roofing and allowed to harden this layer. Then, the gravel layer is evenly distributed over the cooled mastic layer and it is heated to a temperature of 1200 ° C, while the mastic layer is heated to a temperature of 120-1350 ° C. Heated gravel under the influence of its own weight is embedded in the mastic layer and ensures the formation of a reliable protective layer of the roofing (SU 547510, 02.25.1977). However, gravel powder makes the roof structure heavier.

The technical problem to which the invention is directed is to increase the operational characteristics and expand the arsenal of technical means of the method of constructing a fire-protective protective layer of roofing, parameters whose characteristics provide the possibility of applying fire-retardant roofing mastic (OKM) directly to the roof from above, where it is operated on airborne precipitation.

The technical result achieved by the implementation of the invention is to increase the operational characteristics of roofing coatings by increasing refractory properties, reducing the speed of fire spread, since the resulting roofing coating does not allow the flame to spread and causes self-extinguishing of the fire, and the durability of roofing, simplifying the process applying without weighting the roofing itself for the installation of fire belts on the roof of buildings and structures, and t kzhe processing around manholes smoke.

The specified technical result is achieved in the method of installing a fire-protective protective layer of roofing, in which the first layer of fire-retardant roofing mastic is applied on top of the roofing, or waterproofing, or roofing carpet, after the first layer has hardened, at least two layers of fire-retardant roofing mastic are applied with an interval the drying time between their application, while the fire retardant roofing mastic contains the following ratio of components, wt. %:

Chlorinated varnish based on polyolefins 40-80;

Non-combustible fine-fiber natural mineral 20-60;

Surfactant 0.1-2.

Before applying the first layer to the surface of the roofing, or waterproofing, or the roofing carpet, the paint, dust, dirt, poorly fixed particles of roofing are cleaned and visible condensate or water is removed.

Layers of fire retardant roofing mastic are applied with a thickness of 1-1.5 mm until a dry total coating of at least 3 mm is formed.

In places of bending of roofing or on their inclined surfaces, layers of fire retardant roofing mastic are applied in horizontal stripes along the slope.

Use a reinforcing mesh to relieve stress.

Layers of fire retardant roofing mastic are applied at an air temperature of at least + 5 ° C and an air temperature not lower than the dew point, with a relative humidity of not more than 80%.

The drying time of the first layer is no more than 24 hours, subject to favorable drying conditions: air temperature from + 20 ° C to + 28 ° C; relative humidity - not more than 80%.

All of the above, as a whole, expands the arsenal of known methods for increasing the fire resistance of roofing coatings and increases its operational characteristics.

A method of applying fire retardant roofing mastic to create a device for a fire protective protective layer of roofing.

Fire retardant roofing mastic (OKM) is a pasty one-component material in the following ratio of components, wt. %:

Chlorinated varnish based on polyolefins 40-80;

Non-combustible fine-fiber natural mineral 20-60;

Surfactant 0.1-2.

As a chlorinated varnish based on polyolefins, chlorinated polyvinyl chloride resin (PSX-LS resin), or chloropolyethylene varnish KP-734, or chlorosulfonated polyethylene (ChSPE), or other varieties can be used.

As a non-combustible fine-fiber natural mineral can be used: talc, or basalt fiber, or serpentinite, or chrysotile asbestos.

Organo-modified silicone and / or hydroxyethylated monoalkylphenols based on propylene trimers are used as a surfactant.

The OKM binder provides excellent adhesion to most types of substrates, including old roofing, and is applied directly to the roof from above, where it is operated in the air under the influence of precipitation.

OKM is designed to create a fire-retardant coating on top of a waterproofing or roofing carpet.

Before applying, OKM is thoroughly mixed, and the surface (roofing, or waterproofing, or roofing carpet) is cleaned of paint, dust, dirt, poorly fixed particles of roofing, etc. The top layer is cleaned with compressed air, a brush or a vacuum cleaner. There should be no visible condensation or water on the surface. OKM is applied manually with a spatula. As a ground coat, the first layer of OKM is applied with a thickness of 1-1.5 mm, depending on the porosity of the base. Subsequent layers are applied with a similar thickness. The number of layers is not regulated and is at least 3 to achieve a dry mastic coating thickness of at least 3 mm. The drying time of the first layer is not more than 24 hours, subject to favorable drying conditions: air temperature 20 ° C; relative humidity - not more than 80%. Interlayer curing of the coating for more than 24 hours is allowed. The drying time of subsequent layers depends on the drying of the previous ones. Visual control and adherence (there should be no adherence). OKM is applied at an air temperature of at least + 5 ° C (also the air temperature must be no lower than the dew point), relative humidity no more than 80%, and it is necessary to exclude the ingress of atmospheric precipitation onto the roof surface during operation.

In places of bending of the roof or when working on sloping roofs, we recommend applying mastic with horizontal stripes along the slope, the use of a reinforcing mesh to relieve stresses is allowed.

Between one or more layers, a reinforcing mesh, for example of fiberglass, can be used to relieve stress.

The full operational properties of the fire-retardant OKM surface are acquired after 14 days.

Examples of the method.

Example 1

OKM in the composition, wt. %: PSX-LS resin - 70, talc - 28 and organically modified silicone - 2, at an air temperature of + 20 ° C and a relative humidity of 75%, are applied to the previously cleaned surface of the roofing carpet in the form of the first primer layer 1 mm thick, then on another the wet first layer is put the reinforcing mesh “drowning” it in the OKM, wait for the OKM to completely dry, then put the next layer of the OKM 1 mm thick, allow to dry for about 32 hours, and then the third layer of the OKM is 1 mm thick and similarly applied fourth layer of OKM.

Example 2

OKM in the composition, wt. %: PSX-LS resin - 50, basalt fiber - 48, organically modified silicone - 1, ethoxylated monoalkylphenols based on propylene trimers - 1, at an air temperature of + 23 ° C and a relative humidity of 80%, is applied to the previously cleaned surface of the roofing carpet in the form the first layer is 1.5 mm thick, after the first layer has dried, the next layer of OKM is applied on it with a thickness of 1.5 mm, allowed to dry for about 32 hours, and then the third layer of OKM is applied on it with a thickness of 1.5 mm

Example 3

OKM in the composition, wt. %: HP-734 varnish - 65, serpentinite - 33.5 and ethoxylated monoalkylphenols based on propylene trimers - 1.5, at an air temperature of + 25 ° C and relative humidity of 77% applied to the previously cleaned surface of the roofing carpet in the form of the first layer 1.2 mm thick, after the first layer has dried, the next layer of OKM is applied on it with a thickness of 1.2 mm, it is allowed to dry for about 35 hours, and then a third layer of OKM is applied on it with a thickness of 1.2 mm and the fourth layer of OKM is similarly applied.

Example 4

OKM in the composition, wt. %: HSPL - 45.5; chrysotile asbestos - 53, organically modified silicone - 0.5, ethoxylated monoalkylphenols based on propylene trimers - 1, at an air temperature of + 28 ° C and a relative humidity of 60%, is applied to the previously cleaned surface of the roofing carpet in the form of a first layer with a thickness of 1 mm, after after the first layer has dried, the next layer of OKM is applied on it with a thickness of 1 mm, allowed to dry for about 30 hours, and the third layer of OKM is applied similarly.

Example 5

OKM in the composition, wt. %: varnish KP-734 - 80, basalt fiber - 19.9 and organically modified silicone - 0.1, at an air temperature of + 7 ° C and a relative humidity of 40% applied to the previously cleaned surface of the roofing carpet in the form of a first layer with a thickness of 1, 5 mm, after the first layer has dried, the next layer of OKM is applied on it with a thickness of 1.5 mm, allowed to dry for about 40 hours, and then a third layer of OKM is applied on it with a thickness of 1.5 mm, and the fourth and fifth layers of OKM are likewise applied.

Example 6

OKM in the composition, wt. %: KSPL - 55, serpentinite - 54, ethoxylated monoalkylphenols based on propylene trimers - 1, at an air temperature of + 28 ° C and relative humidity of 60% applied to the previously cleaned surface of the roofing carpet in the form of a first layer with a thickness of 1.5 mm, after after the first layer has dried, the next layer of OKM is applied on it with a thickness of 1.5 mm, allowed to dry for about 30 hours, and the third layer of OKM is applied similarly.

Example 7

OKM in the composition, wt. %: HP-734 varnish - 40, talc - 58.7, organically modified silicone - 0.1, ethoxylated monoalkylphenols based on propylene trimers - 1.2, at an air temperature of + 10 ° C and a relative humidity of 55% applied to pre-cleaned the surface of the roofing carpet in the form of a first layer with a thickness of 1 mm, after the first layer has dried, the next layer of OKM is applied on it with a thickness of 1 mm, allowed to dry for about 35 hours, and then a third layer of OKM is applied on it with a thickness of 1 mm and a fourth layer of OKM is similarly applied .

Thus, the proposed method for the construction of a fireproof protective layer of roofing from OKM makes it possible to obtain a fireproof non-combustible coating (which does not allow the flame to spread, and also causes self-extinguishing of the fire site) for the construction of fire belts on the roof of buildings and structures, as well as processing around smoke removal hatches .

Claims (8)

1. The method of construction of a fire-protective protective layer of roofing, characterized in that the first layer of fire-retardant roofing mastic is applied over the roof covering, or waterproofing, or roofing carpet, after the first layer has hardened, at least two layers of fire-retardant roofing mastic are applied with a time interval drying between their application, while fire retardant roofing mastic contains the following ratio of components, wt. %: Polyolefin Chlorinated Varnish 40-80 Nonflammable fine fiber natural mineral 20-60 Surface-active substance 0.1-2 2. The method according to p. 1, characterized in that before applying the first layer to the surface of the roofing, or waterproofing, or the roofing carpet, they carry out cleaning from paint, dust, dirt, poorly fixed particles of roofing and remove visible condensate or water. 3. The method according to p. 1, characterized in that the layers of fire retardant roofing mastic are applied with a thickness of 1-1.5 mm until a dry total coating of at least 3 mm is formed. 4. The method according to p. 1, characterized in that in places of bends of the roofing or on their inclined surfaces, the layers of fire-retardant roofing mastic are applied in horizontal stripes along the slope. 5. The method according to p. 1, characterized in that they use a reinforcing mesh to relieve stress. 6. The method according to p. 3, characterized in that the layers of fire retardant roofing mastic are applied at an air temperature of at least + 5 ° C and air temperature not lower than the dew point, with a relative humidity of not more than 80%. 7. The method according to p. 1, characterized in that the drying time of the first layer is not more than 24 hours, subject to favorable drying conditions: air temperature from + 20 ° C to + 28 ° C; relative humidity - not more than 80%.