SU659548A1 - Method of manufacturing polymer concrete articles - Google Patents

Description

(54) METHOD OF MANUFACTURING CONCRETE POLYMER PRODUCTS

The invention relates to the industry of arrow materials, to methods for manufacturing concrete polymer products. A known method of making concrete-polymer products includes preparing a concrete mix, molding the product, drying it, and diadising followed by impregnation and thermal catalytic polymerization of the impregnating composition, the polymerization initiator being introduced into the concrete mix with mixing water 11. The known method does not allow polymerization at room temperature, leads to a significant noTeiiHM impregnating composition and according to BeTCTBeHHO to a decrease in the strength characteristics of the concrete polymer. The closest to the proposed invention is a method of manufacturing concrete polymer products, including the preparation of a concrete mix, the molding of a product, its heat treatment and drying, followed by impregnation with a polymer, the polymer initiator being added to the concrete mix with mixing, the impregnating medium is a polymer with the polymerization accelerator (2. as the initiator added to the concrete mixture, benzoyl peroxide was selected here, and naphtha was used as the accelerator added to the polymerizing liquid. cobalt nat. The introduction of explosive benzoyl peroxide into the concrete mix is impractical, since friction is completely unacceptable when working with it. But it is impossible to prevent friction while mixing the concrete mix. Moreover, it is almost impossible to evenly distribute small amounts of concrete mix into it ( 0.5-2% of the weight of the absorbed liquid) water-insoluble initiator. Consequently, the probability of a uniform interaction of the accelerator with the initiator and the subsequent uniform polymerization of the composition In the whole mass is excluded. In this connection, the efficiency of the polymerization process at room temperature, a, respectively, and the quality of the products, decreases sharply. The purpose of the present invention is to increase the strength of concrete-polymer products.

This is achieved by the method of manufacturing concrete polymer products, including preparing a concrete mix, molding the product, heat treating it and drying followed by impregnating the polymerized liquid and polymerizing it in the presence of an initiator and accelerator — the polymerization accelerator is introduced into the concrete mix when it is prepared in an amount of 1 -5% by weight of the polymerizing liquid in the product,

When it is prepared, an aqueous solution of the salt of the complex compound metal of variable valence is introduced into the concrete mixture.

The method is carried out as follows.

Example 1. Accelerator - cobalt nitrate (Co (NOg) 2) in an amount of 5% of the weight of the absorbed polymerization liquid is pre-mixed in mixing water and evenly fed into a concrete mixer with other components required to prepare the concrete mix. Then the product is molded, which is then steamed, cyitiaT, and the polymer is impregnated with a polyester resin 98.p.p. + +2.p.p. hyperise

Polyester resin 98.V. + + 2 incl. hyperise

Methyl methacrylate 98 incl. + + 2 incl. benzoyl peroxide

Methyl methacrylate 98 incl. + + 2 incl. benzoyl peroxide

It should be noted that when the polymerization process is carried out at elevated temperatures after impregnation of the concrete samples without an accelerator, such high strength is not achieved. Namely, after treatment with 98 polyester resin. + 2 incl. hyperise maximum strength - 530 gks / cm and methyl methacrylate 98.h. + 2 incl. benzoyl peroxide maximum strength is also 530 kgf / cm

The use of the proposed method of manufacturing concrete polymer products provides, in comparison with existing methods, the following advantages:

the possibility of obtaining high-strength concrete-polymer products processed at room temperature;

loss of polymerizing fluid. at the stage of polymerization, 30-40% less than in the implementation of the polyisation and the composition in the form of polyester :: moles - 98.h. and initiator of hyperysis - 2 incl. The polymerization process is carried out at room temperature.

EXAMPLE 2 Accelerator B (25% solution of acidic phosphate) in an amount of 1.5 - is absorbed from the absorbed polymerization liquid in mixing water and is evenly fed into the concrete mixer with other components to prepare the concrete mix. Then the product is molded, steamed, cyiuaT and impregnated with the polymerizable composition, in the form of methyl methacrylate 98.h. and the initiator is benzoyl peroxide 2. To prevent the monomer from evaporating, the impregnated product is dipped in paraffin to form a surface film. The polymerization process is carried out at room temperature.

The concrete polymer samples thus manufactured were tested for strength. The table shows the test results.

220 655 600 240

merization at elevated temperatures without an accelerator;

impregnation of the initiated concrete system with a water-soluble accelerator pre-introduced into the concrete mix, performing the function of active polymerization centers, preferably for a uniform process throughout the impregnated mass of concrete;

safety of the process.

Claims (2)

1. A method of manufacturing concrete polymer products, comprising preparing a concrete mixture, molding the product, heat treating it and drying it, followed by impregnation, is polymerized with a liquid and polymerized in the presence of an initiator and an accelerator, characterized in that. five . 659548 In order to increase the strength of the product, the combination of metals with a variable polymerization solvent is introduced. the concrete mixture during its preparation. Sources of information taken in the amount of 1-5% by weight of polymerization, attention during examination liquid in the product. USSR author's certificate 2. The method according to p. 1, about t of l and h and - 2008177/33, cl. From 03 to 41/28, w y and i with that in concrete 5 03/27/74. when preparing the mixture, enter t2. Steinberg M., Q 0. Nuclean News an aqueous solution of salt or complex1970, 13 9, p 48-54,