RU2004525C1 - Process for manufacturing bloated building mixture - Google Patents

Abstract

Usage: in the field of building materials for the manufacture of insulating and acoustic products, lightweight decorative architectural elements and sculptures. SUMMARY OF THE INVENTION: The cement is mixed with polystyrene beads in a ratio of 100 5 - 20 by volume, co-milled to a specific surface of 4000-6000 cm / g. aggregate, additives, and water are introduced, placed in a confined space, and exposed to heat from a microwave microwave emitter to obtain a molded article of a predetermined strength and density. R 16-28 MPa plots ° nost 600-900 kg / m. 1 tab.

Description

,: refers to the technology, the raw materials that G.jrbi-- can (for the manufacture of heat- / - O / and acoustic products i zz м yu m yopopusty, lightweight decor-, x. pecking elements, as well as cr ulgiur.

Known methods for the preparation of the construction of molded mixtures, porous air}} Ј 1 -existing or gas-forming joOas aiw, introducing into the mixture a mixture of ii iCc K. zhegos 1yulistyrol component3

A drawback of these methods is i e r, rcrn s lh the strength of the products obtained i i.

1 Bolshoi with a technical similarity I, i, is a well-known

GCI i (5 .if, Construction mixes,

 chyu d p tspm mixing in the burning,

-.on j. i for n-smlropnoy beads and

- n r, p, heat treatment

 m ri in a closed volume i i viv,. / yus.ooobogku in a known mannerV) or mot for a period of 1-3 min,

t .o l pso-pored conductors .1 IO FRO ln or using electrodes.

U dos i si kchchi of the known method vl - t st peto; of a significant part of the gate containing vc e with superfluous water shutter ht / i ms contact contact heating with iec i electrodes and, as a result of this, unequal swelling and unequal strength and density of products.

The whole invention is to increase the strength and density of products from a porous-based construction mixture and the high accuracy of their manufacture.

This problem is solved due to the fact that during the preparation of a porous concrete mixture, the mixture of cement with polystyrene beads in a ratio of 100: 5-20 is crushed by volume together to a specific surface of 4000-6000 cm2 / g, the finished mixture is placed in a closed volume and subjected In the event of microwave exposure, microwave emitters are produced to obtain a molded product of required strength and density

When carrying out the invention, a technical result is created which consists in creating an intense (5-7-fold) and uniform expansion pressure, while the mixture of powdered bead and polystyrene beads is used as a finely ground bead, and heating the mixture using a microwave oven creates such a state a mixture that allows PL accuracy to be repeated in products

tiniest detail-and surface forms. In this case, the surface layer of the article is significantly compacted, and there are no pores in it.

The method of preparation of porous

building mixture can be carried out as follows

Cement, lime-ash, lime-tuff cement or gypsum, which are mixed with polystyrene beads in a percentage ratio of 100 5-20 by volume and grind the mixture to a specific surface of 4000-6000 cm2 / g, can be used as a curing agent. When grinding, additives, for example, plasticizing or water reducing, can be used. As aggregate, building sand or coarse aggregate in relation to

0 to thickener 1.3 and water, which is added to the required consistency or workability of the mixture (cone draft 1-3 cm). After mixing to a uniform consistency, the mixture is placed in a closed

5 volume of the form, filling it in 2 / 3-3 / 4 volume or completely, after which the mixture is subjected to heat treatment. For heat treatment, for example, a microwave oven, Electronics Electronics SP-23, with a useful power of Mpolezn 600 W, with a heating temperature of t 95-105 ° C, can be used

During the heat treatment, the mixture is spontaneously compacted due to its expansion in a closed

5 volume Polystyrene beads, crushed together with a viscous to a cluster state, mixed with aggregate and water under thermal influence at a temperature of t 90-100 ° C over the entire volume of the mixture, enclosed in a confined space, foams and creates an intense (5- 7-fold) and uniform expansion pressure, squeezing the excess mixing water out of the mixture, since only 15% of the created water is used to hydrate the cement and 10% when hydrating in an air-drying hardener, such as gypsum. The strength of the material as a result of heating in a microwave oven for 3-5 minutes and

0 subsequent curing increases significantly, and the density of its mineral part increases due to the expansion pressure of the crushed polystyrene beads, which allows you to repeat in the product

5 smallest details the surface of the mold and achieve significant strength, especially in the surface layers

As can be seen from the table below, the values of the strength of cement-sand mortars from building mixtures prepared on cement using cement or gypsum stone on gypsum in cement, the setting of which was slowed down by the introduction of dobash plasticizer (SDB) into the building mixture, is higher, and the densities, which would correspond to these strengths of polystyrene concrete prepared by the prototype method below,

moreover, the surface quality of the samples made by the proposed method is better.

(56) USSR Copyright Certificate No. 1516482, cl. C 04 V 38/10, 1987.

Gorlov Yu.P. Technologists of thermal insulation and acoustic materials and products. M .. Higher school, 1989. 254, 255.

Note: In case 1, the specific surface of the crushed cement according to the proposed method was 6000 cm2 / g. In the case of 2 - 1000 cm / g

Claims (1)

The claims METHOD FOR PORIZO PREPARATION: BATHING BUILDING MIX, including mixing in thickening, polystyrene beads and water, followed by heat treatment in a closed volume, characterized in that before mixing is carried out joint grinding to a specific surface of 4000 - 35 6000 cm / g in thickening and polystyrene beads in a ratio of 100; 5 to 20 by volume, after which aggregate and water are fed into the mixture, and the heat treatment is carried out by microwave exposure to 40 microwave bodies to obtain a molded product of the required strength and density.