RU1785907C - Method of manufacture of polymer-concrete articles - Google Patents

Abstract

The invention relates to the production of building products and materials, in particular fiber reinforced concrete polymers. The purpose of the invention is to improve the physical and mechanical properties of products. The method consists in adding fiber and a polymer additive to a dry mixture of mineral materials, vibrating, and then methyl methacrylate monomer with a polymerization initiator is fed under pressure from the mold and the mixture is heat treated. 1 tab.

Description

The invention relates to the production of building products and structures from concrete composite material, for example, from fiber reinforced concrete.

A known method for the manufacture of half-concrete by separate concreting, including laying aggregate and a filler with continuous granulometry and pouring a binder based on methyl methacrylate, followed by vibration.

The specified method has the following disadvantages: a high level of consumption and loss of acrylate binder; the resulting products have low physical and mechanical properties, which limits the scope.

The purpose of the invention is to improve the physical and mechanical properties of products.

This goal is achieved by the fact that according to the method of manufacturing polymer concrete products, including laying in the form of a dry mixture of mineral materials, pouring it with a binder based on methyl methacrylate monomer with a polymer additive, vibration and heat treatment are added to the dry mixture, fiber and polymer additive are vibrated in the monomer with the polymerization initiator is fed under pressure and the mixture is heat treated.

Techniques for implementing the proposed method are as follows.

Separately, a dry mixture is prepared: silica sand is mixed with a finely ground filler to obtain a homogeneous mass, after which crushed stone and fiber are added, as well as a polymer additive - polystyrene or cellulose acetate. After stirring, the resulting mixture was laid in a mold. The dry mixture is compacted in the mold by vibration with a load of 100-120 g / cm. If necessary, when laying the dry mixture in the mold, local or oriented fiber reinforcement is carried out, introducing it directly into the mold. Then, a binder consisting of methyl methacrylate monomer and a polymerization initiator, a porophore, is fed from the bottom of the mold. The sealed form has a double bottom, one bottom is perforated and impregnated through it,

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and a binder under pressure is fed into the space between the sheets of the mold.

The polymerization of products takes place in forms dipped in heated water with a temperature of 70-80 ° C for 3-4 hours.

Example. 1.43 kg of andesitic flour are taken, mixed with 3 kg of quartz sand until a homogeneous mixture is obtained, then 0.7 kg of fiber, 0.1 kg of polystyrene and 4.7 kg of crushed granite are added and, after obtaining a homogeneous mixture, they are laid and compacted form.

A binder mixture is prepared separately, consisting of 0.5 kg of monomeric methylmethacrylate and 0.0025 kg of polymerization initiator (porophore), which is fed from the bottom of the mold under pressure. Fiber is used as fiber.

Polymerization occurs during heat treatment in an aqueous medium at a temperature of 70-80 ° C for 3-4 hours,

The obtained samples are tested according to the methodology in accordance with the Guide to Testing Methods of Polymer Concrete M .: NI-IZHB, 1970 ..

The advantages of the proposed method in comparison with the known are shown in the table.

As can be seen from the data of the table, the proposed method, in comparison with the known one, provides a reduction in the consumption and losses of a deficient binder and an improvement in physical and mechanical characteristics.

Claims (1)

- The claims A method of manufacturing polymer concrete products, including laying in a form a dry mixture of mineral materials, pouring it with a binder based on methyl methacrylate monomer with a polymer additive, vibrating and heat treating, characterized in that, in order to improve the physicomechanical properties of the products, fiber is added to the dry mixture and the polymer additive, vibrate in the mold, and then the methyl methacrylate monomer with the polymerization initiator is fed under pressure from the mold bottom and the mixture is heat treated.