SU1145009A1 - Method of finishing hardened concrete and reinforced concrete articles - Google Patents

Abstract

A METHOD FOR FINISHING SOLIDIFIED CONCRETE AND REINFORCED PRODUCTS, manufactured face up, including wetting the surface of the product with water and treating with a smoothing tool, characterized in that, in order to increase the surface strength of the product, after wetting, the surface is polished with a rotating disk at a speed of 250350 rpm, and a surface with a rotating disk with a speed of 250350 rpm, and a surface with a rotating disk, with a speed of 250350 / min. polymer dispersion of 8-12% concentration in the amount of 200-300 g / m, after which smoothing is carried out. (About c:

Description

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This invention relates to manufactured building materials, in particular, to methods for finishing interior wall panels manufactured face up. There is a method of finishing interior wall panels by applying a putty compound and then smoothing the surface with a rail l. Closest to the proposed technical essence is the method of finishing the surface of the panel, in which the surface; the panels are abundantly moistened with water using a spray gun. Then, immeddies on the surface of the sink panel are filled with a solution per stripper and putty t 2 3. A disadvantage of the known methods is the low adhesion strength of the putty to the product. The purpose of the invention is to increase the surface strength of products. This goal is achieved by the fact that according to the method of finishing the concrete and reinforced concrete products, made face up j including wetting the surface of the product with water and processing with a smoothing tool, wet the surface with a rotating surface with a disk at a speed of 250350 rev / m and apply polymer dispersion 8 -12% concentration in an amount of 200-300 g / m, after which smoothing is carried out. The essence of the method is as follows: The hardened concrete or glands concrete product is moistened with plenty of water. Next, the surface is polished using a stone-processing flat grinding machine SMR-013A in one pass at a speed of B1 of a disk of 250-350 rpm. Due to the low rotational speed of the abrasive wheel, the formed slag remains on the surface of the product and is rubbed into its irregularities D 9 and a water dispersion of the polymer of 8-12% concentration in the amount of 200-300 g / m, which wets the sludge well on the surface, is applied to the polished surface. surface of the product. As a result, a viscous mass is formed, which includes the remains of cement and sand. It has good elasticity and sufficient strength, which allows it to be used as a putty material. Aqueous polymer dispersion (VDP) is made of synthetic latex СКС-65 ГП with a stabilizer; it is obtained by hydrolysis of bone glue with sulfuric acid, followed by neutralization of the solution with ammonia and mixing with a surfactant. The latex aqueous dispersion is applied in an amount of 200-300 g / m, which ensures good wetting of the sludge over the entire surface of the product. Example. The finishing of the interior wall panels (3x6 m) -formed from cast concrete mix and draft of the cone 17-20 cm face up is carried out. After heat treatment, the product is sent to the finishing station. The surface of the product is moistened with water from a hose for securing. Then they co-grind irregularities in one pass of the abrasive disk of the stone-processing surface grinding machine SMR-013 A. The disk rotates at a speed of 300 rpm. Next, apply a 10% aqueous solution of the polymer dispersion in an amount of 200 g / m. For final leveling of the surface using a rail with a fixed rubber. In two passes of the rail across the entire width of the product, the resulting mass will putty all the pores and surface irregularities. The product without additional refinement enters the finished goods warehouse. In tab. 1 shows the comparative data on the adhesion strength of the putty layer with articles made of hard and cast mixtures.

Table 1

 VDP consumption for putty amount of putty. In tab. 2 shows the results of studies of the dependence of the adhesion strength of the formed putty composition on the concentration of the VDP at a flow rate of 250 g / m. Table 2 is designed for the required From table. 2, it can be seen that the optimal concentration of VDP lies in the range of 8-12%. In tab. 3 shows the parameters {l, which substantiate the optimum rotation speed of the abrasive tool of 250-350 rpm. That blitz 3

1145009

The data show, for the meter, the ukryness of the panel with sludge that the processing time at low speed in this case is only 47%. The speed of rotation of the abrasive tool. Using this method of thawing (less than 250 rpm) increases the cutting of concrete and reinforced concrete from two times in comparison with the optimum 5 items, provides an opportunity for speed, which lengthens the technological products formed by the individual process. Up from any heavy concrete, at a rotational speed of machining — in particular, of cast mixtures, as well as a spinning disk above 350 rpm for the use of waste — sludge in the end result, a variation of 55% of the ground component of the hard putty sludge is ground out products for his pe-ki.

Claims (1)

METHOD FOR FINISHING HARDENED CONCRETE AND REINFORCED CONCRETE PRODUCTS, made face up, including wetting the surface of the product with water and processing with a smoothing tool, characterized in that, in order to increase the surface strength of the products, after wetting, the surface is ground with a rotating disk at a speed of 250 350 rpm, applied with 250 rpm water / min a polymer dispersion of 8-12% concentration in an amount of 200-300 g / m ² , after which smoothing is carried out. SU. .. 1145009 1 1145009>