SU1712188A1 - Method for production of laminated structures - Google Patents

Abstract

The invention relates to construction and is intended for the manufacture of three-layer structures, for example, wall panels with a middle thermal insulation layer. The purpose of the invention is to reduce the mass of the panel with increasing thermal insulation properties. The method consists in the sequential laying of the concrete mixture of the lower layer, the heat insulating material with a density of 200–300 kg / m ″, containing solid and elastic organic aggregate, the concrete mixture of the upper layer and vibro-compaction with the weights of 13-10 ”—60-10” Pa Weight 1 \ g of the panel, depending on the type of concrete of the upper layer 430-707.5 kg. 3 tabl.i

Description

The invention relates to construction and is intended for the manufacture of three-layer structures, for example, wall panels with a middle thermal insulation layer.

The purpose of the invention is to reduce the mass of the panel and increase its thermal insulation properties.

The method of manufacturing layered structures consists in first placing the bulk reinforcement cage, then pouring the bottom layer of concrete mixture, for example, heavy or expanded clay concrete, uniformly compacting it, then pouring a layer of heat insulating material from the casting styroporbeton thickness of 1.035-1.200 from with an estimated density of 200 to 300 kg / m and, finally, the top layer of a concrete mix, for example, expanded clay concrete or heavy concrete, while the specific pressure will be 13-10 - 60X XU Pa. The distance from which the top layer of the concrete mix is poured to the surface of the heat insulating layer

must not exceed 15 cm for pouring heavy concrete, 20 cm for pouring light concrete.

The adhesion of the structural and thermal insulation layers is ensured through the use of mineral stitching in all layers, and the thermal insulation properties of the middle layer through the use of light organic aggregates, such as granules of foamed polystyrene, woody crushed stone, granulated peat, etc.

A specific load of 13–10–60–10 Pa ensures the compressibility of the heat insulating layer in the range of 1.035–1,200, which, in turn, provides the calculated thickness of the heat insulating layer.

Example. Experimental moldings of layered structures were carried out — fragments of sandwich panels with an average thermal insulation layer from a filling mineral-organic elastic material — styroporbeton, peat concrete, and arbolitbeton, whose characteristics are given in

tab. 1, 2, and 3. The molded samples of the panel fragments were steamed in the usual mode with an isothermal holding temperature of 65-70 ° C, tested for strength and heat characteristics, and after testing the actual thickness of the heat insulating layer was measured. The pressure of the weights was determined by calculation from the density of the concrete mixture of the upper layer and the thickness of this layer using the formula

Py;, Ycv, -Ys ,,.,

Gle P ,, - specific pressure, Pa;

Y. ,, - bulk density of the concrete mix, kg / m;

.i - layer thickness, m. Resu; 1yaty experimental data are given in Table. I, 2 and 3.

As a heat-insulating layer, a casting resilient mineral-organic material was used - styroporbeton, peat-concrete and arbolitbeton, with a density of 200-300 kg / m.

The composition of styroporbeton, May. % :, In the hell 58,0-65,0

Foam granules according to; 1-styrene13.0-15.0

Water 20,0-26,6

Additives0-0.4

The compositions of wood concrete and peat concrete, May. %:;. . .

Wood concrete Torfobeton In the other45 ... 5050 ... 55

Drobls.chka35 ... 4030 ... 35

(I ran. Peat.)

Water15 ... 17.515 ... 17.5

Additives: About ... 0.5O ... 0.5

The thickness of the fill of the thermal insulation strip before laying the top layer of concrete is 1.035-1,200 of the calculated thickness of the thermal insulation layer; 1.2 - the maximum possible compaction of the mixture.

When the seal is compacted, the density of the heat insulation layer of the zioin layer can be more than 300 kg / m, which degrades the thermal performance of the panel and, in addition to provide a seal of more than 1.2, the thickness of the top layer of concrete should be more than 200 mm heat engineering and economic indicators - the weight of the panel increases, and the thermal resistance decreases; 1,035 - the minimum possible compaction that can be provided by the top layer of concrete. The thickness of the top layer of structural lightweight concrete is less than 80 mm and heavy concrete less than 50 mm cannot be taken from the safety conditions of the upper layer reinforcement

0 concrete, in accordance with the requirements of regulatory documents.

The density of the heat insulating layer of more than 300 kg / m reduces the thermal performance: and increases the weight of the panel,

which is not economically feasible. At a density of less than 200 kg / m, in the process of laying the top layer of concrete and its vibro-compaction, the thermal insulation layer is impaired.

The specific pressure of pressing from the top layer of concrete is 13-10 ... 60-10, which is determined by calculation taking into account the requirements of GOST-11024-84 and other regulatory documentation.

In tab. Table 1 shows examples of heat insulation with a Zionic layer of polypropion concrete. 2 - of wood concrete, in table. 3 - from peat concrete.

Claims (1)

Invention Formula 0 A method of manufacturing layered structures, including the sequential laying of a concrete mixture of the lower layer, a thermal insulation material — a mixture in the upper layer that is in contact with the aggregate, a concrete mixture of the upper layer, and vibration compaction characterized in 5 that, in order to reduce the mass of the panel and increase the thermal insulation properties, the thermal insulation material is laid with a thickness equal to 1.035-1.2 design, and vibration compaction is carried out with weights 0 with a size of 13-U-60-10 Pa, and the heat insulating material is used with a density of 200-300 kg / m with elastic organic filler. ha 3 s q th go Experimental data for 350 mm tolcina panel table 2 Expert 1mental l 1nl panels with a thickness of 330 them Table 3