RU1781083C - Outer wall panel manufacturing method - Google Patents

Abstract

The invention relates to methods for manufacturing exterior wall panels and may find application in the prefabricated housing industry. The purpose of the invention is to increase the durability of the coating while reducing labor costs. The method is carried out in the following sequence. A protective layer of cement-sand mortar is laid in the prepared mold, then the structural layer of expanded clay-concrete and compacted on a standard vibrating platform. After that, lay the mixture of decorative coating composition, in wt.%: Cement 6.6-8; crushed stone 69-74, sand 13-16, aerosil modified with dimethyldichlorosilane 0.0010-0.0012, water - the rest. The laid mixture is compacted under a vibroload with a load of 10–20 g / cm2 for 10–30 s. The product is then cured. The durability of the decorative coating is at least 3 years. (/ WITH

Description

The invention relates to methods for manufacturing exterior wall panels and may find application in the prefabricated housing industry.

Known methods for manufacturing exterior wall panels face up by sequentially laying a structural layer of light concrete mixture and a terrazite mixture containing cement, decorative crushed stone and water, followed by short-term compaction under a vibroload, creating a pressure of 80-100 g / cm2, exposing the decorative aggregate and hardening products . Exposure of the aggregate is carried out by sprayed water or an air-water mixture.

This method is the closest to the proposed technical essence and the achieved result.

The disadvantages of the known method are the relatively high water absorption of the surface decorative layer, the precipitation of individual grains of rubble from the holder of the solution, i.e. insufficient durability of the decorative coating. In addition, this method is quite time-consuming.

The aim of the invention is to increase the durability of the coating and reduce labor costs when obtaining a relief surface.

The specified goal in the invention is achieved by the fact that in the method of manufacturing externally 4

with

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s

wall panels with a decorative coating, including forming a structural layer, laying on its surface a mixture of decorative coatings containing cement, crushed stone, sand and water, compaction under vibration for 10-30 seconds and hardening of products, lay a decorative coatings mixture containing additional aerosil modified with dimethyldichlorosilane in the following ratio of components, wt.%: cement 6.6-8; crushed stone 69-74; sand 13-16; modified aerosil 0.0010-0.0012; water - the rest, and its compaction is carried out at a load of 10-20 g / cm.

During surface vibration compaction under the above-mentioned conditions, the cement-sand mortar of the decorative coating flows down from the gravel, leaving it 1/3-1 / 2 of its diameter open, and the modified aerosil floats, concentrating on the upper surface of the mortar. A thin cement-aerosilic film having hydrophobic properties also remains on the exposed surface of the rubble.

As a result, the exterior wall panels made according to the invention have enhanced water and dust repellent properties of the decorative coating.

PRI me R 1. The outer wall panel is made on a molding conveyor. A protective layer of cement-sand mortar of grade 100 with a thickness of 20 mm is laid in the prepared form, then a structural layer of a cementitic concrete mixture with a thickness of 300 mm and the laid layers vibrate on a standard vibrating platform. After that, they lay a mixture of decorative coating with a thickness of 20 mm, in wt.%: Cement - 8, crushed stone of lime fractions 5-20 mm - 69, quartz sand - 16, aerosil modified with dimethyldichlorosilane (AM-1-300 grade) - 0 0012, water 6.9988. Seal the decorative coating mixture with a vibroload at a pressure of 10 g / cm2 for 30 seconds.

Example 2. Laying and sealing of the structural layer of the panel is carried out analogously to example 1. After that, lay the mixture of decorative coating composition, in wt.%: Cement 6.6; fractionated crushed stone with a grain size of 10–20 mm — 74, sand — 16, aerosil, modified — 0.001, water — 3.399. Compaction of the decorative coating mixture is carried out under a vibroload at a weight value of 20 g / cm for 10 seconds.

Full-scale tests of the panel samples made according to examples No. 1 and No. 2 showed the preservation of the decorative coating for 3 years. The durability of the decorative coating is ensured by the strong seal of crushed stone in the hardened mixture, as well as by increased water and dust repellent properties, which allows the coating not to darken when it rains and maintain its original color and tone.

The decrease in labor costs in the manufacture of panels is due to the exclusion of operations to expose the decorative aggregate.

Since in the panels made according to the invention, the outer surface of the rubble is covered with a cement-aerosil film, it is possible to use a generic non-deficient, including calcareous crushed stone,

Especially effective is the use of the invention for the manufacture of exterior wall panels operated in areas with a humid climate.

Claims (1)

The claims A method of manufacturing exterior wall panels with a decorative coating, comprising molding a structural layer, laying on its surface a mixture of decorative coatings containing cement, crushed stone, sand, and water, compaction under vibroload for 10-30 seconds and hardening of the product, characterized in that in order to increase the durability of the coating and reduce labor costs when applying the embossed surface, an additional aerosil modified with dimethyldichlorosilane is added to the mixture of the decorative coating, in the following cases . Wearing components, wt%: cement 6.6-8.0; crushed stone 69-74; sand 13-16; Aerosil 0.0010-0.0012; water else, and its compaction is carried out at a load of 10-20 g / cm2.