SU967997A1 - Fire-proofing raw mix - Google Patents

Description

(54) FIRE RELEASE RAW MATERIAL

The invention relates to the building materials industry and can be used by plants carrying out work on fire retardant coatings on metal structures before sending them to the construction site, as well as in carrying out these works under construction conditions. A fire retardant coating composition is known, including liquid steel, a phosphate hardener, asbestos, expanded perlite sand 1. However, a coating made of this composition has low permeability and, at a thickness of 10 mm, the fire resistance of the metal is 0.5 h that is two times lower than the fire resistance required by standards for flooring slabs and other supporting structures for interfloor and attic floors. Closest to the present invention is a flame retardant raw material mixture comprising, wt.%: Binder (liquid glass) 4-96.8, calcined intumescent filler (expanded vermiculite) 3-16, unburned intumescent filler., (Unannealed vermiculite) 0.2-80 | 2j. The disadvantage of the known substance, related to its qualitative and quantitative composition, is that the coating made of this substance with a layer of 10 mm, when exposed to fire, swells, breaks down and moves away from the surface to be protected. The fire resistance of this coating is approximately 0.75 hours, which is significantly lower than the fire resistance required by standards for slabs, flooring and other supporting structures for interfloor and attic floors. The aim of the invention is to increase the strength of the coating and increase its fire resistance. The goal is achieved by the fact that the flame retardant raw material mixture, including liquid glass, expanded vermiculite and unfired vermiculite, additionally contains mineral wool and nepheline flame retardant in the following ratio of components, wt.%: Liquid glass 14-82. Expanded vermiculite4-24 mineral wool2-7

Nepheline

fire retardant4-8

Unfired

vermiculite Rest

The advantage of the proposed combination of organic and distinctive features is that the coating made of the proposed substance does not collapse under fire impact and at a layer thickness of 10 mm informs the metal structures of the fire resistance limit 1 hour staircases and columns.

The preparation process for this substance is as follows.

Liquid sodium glass, 1.46, module 2.7 (GOST 1307 8-67)

Expanded vermi - lit (GOST 12865-67)

Concentrate vermiculite ore PB-80 (not opened. Vermiculite) .TU-21-25-75-71)

Mineral wool MOOO average fiber diameter b micron, 2% soda-e sulfur 1% (moisture)

Nepheline flame retardant (TU-08-340-76)

These mixtures were tested for strength when tested for fire resistance

during compression and bending and fire resistance, visual observations were made of the .50 current strength of the coating under fire impact. Compressive strength tests were carried out.

and bending were carried out according to standard table. 2 presents the main

methodology (GOST 5802-76). properties. Compressive strength, kgf / cm Bending strength, kgf / cm

They take the binder and mix it with mineral wool, then expanded vermiculite is introduced, mixed thoroughly, then unfired vermiculite is loaded into the forced-action mixer. The nepheline flame retardant is introduced last. All components are mixed until homogeneous for 3-4 minutes.

One of the appropriate areas of application is fire protection of building structures.

A specific example of execution, In table. 1 shows the composition of the mixture.

Table

48

14

14

24

27.5

47

4.5

Tables A2 106

.

Coating Condition During Fire Tests

Analysis of the data obtained during the testing of fire retardant coatings made from the proposed mixtures shows that with the additional introduction of mineral wool and nepheline flame retardant, the fire retardant coatings become more durable (not destructive when exposed to fire) and their fire resistance increases, on average, by 20- 25%.

Fire retardant raw material mixture with the content of additional components: nepheline flame retardant in the amount of 4 to 8% and mineral wool - from 2 to 7% ensures the durability of the coating during operation and fire impact and the fire resistance required by the standards for all types of structures except for the walls and walls staircases and columns.

Thus, the proposed combination of ingredients solves the important task of increasing the strength of the coating when exposed to fire and increasing the fire resistance required by the standards for all types of structures with the exception of stack-bearing walls of staircases and columns.

Continuation taOl 2

coating coverage

vspuchaet- vzpuyas not destroyed

is coming. On destroys the surface with. There are no cracks on the surface.

cracks.

Claims (2)

Invention Formula Flame retardant raw material mixture, including liquid glass, expanded 25 vermiculite and unfired vermiculite; O T l and h aa sh with tetla, which, in order to increase the strength of the coating and increase the fire resistance, it contains additional mineral wool 30 and nepheline fire retardant in the following ratio of components, wt.%: Liquid glass 14 -82 Swollen vermiculite.4-24 35 Mineral. cotton 2-7 Nepheline fire retardant4-8 Unlabeled 40 Vermiculite Else Sources of information taken into account in the examination 45 1. Sorin V. et al. Fireproof coating OFP-MM, - Building materials; materials, 1977, No. 10.  2. USSR author's certificate 509563, cl. From 04 To 48/10, 1973.