SU981535A1 - Complex roofing panel - Google Patents

Description

(54) COMPLEX PLATE COATING

The invention relates to the construction, in particular to the manufacture of integrated slabs of coverings and insulated panels of the shells of vaulted buildings.

Known fencing plates of coatings consisting of a concrete base, vapor insulation, a layer of insulation, waterproofing. As a insulation, mixtures of bitumen and perlite, cement and perlite, water C1 are used.

The disadvantage of these structures is that the heat-insulating mixtures and materials used as insulators have a large bulk weight (from 450 to 500 kg / m) and, accordingly, low thermal properties, which requires the appointment of a large insulation layer thickness and significant costs. mother stuff In addition, a large mass of insulation layer requires an increase in the carrying capacity of the main structure, i.e. increasing its thickness and degree of reinforcement.

Consequently, the known constructions and methods for their manufacture (insulation) are unsuitable for insulation of thin-walled reinforced concrete (thickness 4–5 cm) and reinforced concrete

 1.5 cm cladding panels for vaulted buildings.

Closest to the technical solution is a coaxial slab of coating, which includes a reinforced concrete base, vapor barrier, heat insulation and waterproof layer. The heat insulating layer is made of t21 foam.

ten

The disadvantage of this panel is that the layer of heat-insulating material has a low compressive strength at 10% linear deformation (1.171, 25 kgf / cm or 0.11-0.125 MPa) and

15 low tensile strength in bending (0.1. MPa), which leads to premature destruction of the insulation when installing panels, monolithing joints, etc., as well as in the process

20 operation, and a significant consumption of polymeric material.

The purpose of the invention is to increase the strength and reduce the consumption of polymer

25 stuff.

The goal is achieved by the fact that in the complex slab of the coating, including reinforced concrete ocHoaaHjie, vapor barrier, heat insulation and waterproof insulation, the heat insulation layer is made of a composition containing, wt%:

Polystyrene

fractions up to 0.05 mm11 0-24.0

Wood fibers

fractions 5-10 mm 48.0-71.0

Urea smog., La or woda18,0-28,0

The drawing shows the design of the proposed insulated plate.

The slab consists of a concrete base no 1 IB in this case, a hyperbolic reinforced concrete panel-shell dp vaulted building of agricultural purpose), paroizolyatsii 2, layer 3 of insulation and waterproofing 4

Plates are manufactured as follows.

A paroizolation layer 2 is applied on the newly laid concrete with a uniform layer and then a heat insulating mixture 3, which is a mixture of polystyrene of dust-like fractions up to 0.5 mm, wood fibers of a fraction of 5-10 mm (sawdust, shavings, fire, etc.) zanu - carbamide resin or water ..

Polystyrene brand PSV-S (fraction 0.5 and less)

Sawdust (antiseptic)

Water soluble synthetic binder (carbamide resin)

Bulk mass Compressive strength at 10% linear deformation Flexural strength

Coefficient of thermal conductivity

Water content

after 10 days

Note: When replacing a water-soluble synthetic binder with water, starting from composition 2, the strength characteristics of the insulation are reduced to 15%.

A layer of waterproofing 4 is applied on top of the laid heat-insulating mixture 3 and closed with locking clip K1, a layer of waterproofing 4 is applied and also closed with fixing cover. Through the nozzles in the mold and the lid the steam is supplied with temperature. OI: to the mold at 80-90 ° C and the lid at 95-98 ° In the case of heating the heat-insulating mixture with electric heating devices (electric heaters), the lid should warm up to 120-130 ° C. After heat treatment, the products are delivered to the post of demolding and the warehouse of finished products. Stripping is carried out at a product temperature not higher than 60 ° C. First, the latches are turned off, then the lid is lifted and the forg boards are dropped. When storing and transporting heat-insulated slabs, special gaskets are used, which exclude crushing and damage to the heat-insulation layer.

Examples of insulation compounds are given in table. 1 and 3, and the physicomechanical characteristics in the table. 2 and Table

11,018,7424,0

71,060,2248,0

18,021,0428,0

Table

112

130

250

0.062 0.26 1.12 0.02 0.20 1.2

0.0626 0.054 0.07

13.9

15.75 20.4

Water soluble synthetic binder (carbamide resin)

Compressive strength at 10% linear

As can be seen from the above tables of Ari, polystyrene plays a decisive role in the strength of the formation of wood-polystyrene insulation. The more polystyrene in the composition, the stronger the insulation. For the production of insulation consumed 30-60 kg of polystyrene in 1 m of insulation. The flow rate is selected within the norms used for the production of polystyrene foam for construction purposes, recommending the use of insulation for roofs without an additional layer with a strength of at least 0.06 MPa. The selected consumption limit of polystyrene provides insulation strength in compression at 10% linear deformation from 0.06 to 1.2 MPa. With an increase in the consumption of polystyrene over 60 kg / m, the strength of the insulation continues to increase, which is economically impractical for integrated panels. Sawdust consumption is selected in the range of 80-120 kg / m. The choice of sawdust due to the fact that the wood often have an average bulk density of 100 kg / m and when laying

12.5

29.0

Table 4

no additional sealer is required in the molds. If the consumption of wood particles exceeds 120 kg / m, additional mechanical sealing of more than 1 kg / cm is required for their stacking into the mold, which leads to an increase in the power consumption and an increase in the cost of insulation. The use of wood particles above the specified boundary value is also undesirable because they inhibit. polystyrene foam ability and this leads to its overspending.

In addition, the physical and mechanical characteristics of the insulation are deteriorated.

Consumption of carbamide resin binder, selected in the range of 20-70 kg / m. As can be seen from the table. 2 and 4, a smaller amount of carbamide resin with a maximum consumption of polystyrene significantly affects the decrease in the strength characteristics of the insulation, i.e. less than recommended strength. A larger amount of resin significantly affects an increase in the insulant bulk density.

Claims (2)

1. USSR author's certificate number 631499, cl. From 04 To 39/02, 1972. 2. Gusak N. et al. Improving the technology for manufacturing integrated coating plates. Abstract information Minpromstro USSR. Ser.St. M., 1975, No. 12, with. 6