A method of manufacturing concrete products

 

(57) Abstract:

The invention relates to the production of building materials and products. The objective of the invention is to eliminate the disadvantages of the known method, as well as cheapening the process as a whole in dozens of times, flexibility of the process for the formation of a wide range of products, the use of non-traditional materials. The method consists in the following: serves evenly, but with different velocities in the electron-ion mixer occasioanly binders and fillers, particles which are oriented in an electrostatic field, mixed and deposited in the moving underneath the form, performed with the plate in the likeness of vacuummeter and fittings in the bottom and side walls. In the second stage the dry ingredients in the form of compressed using a synthetic polymer film and vacuum, through fittings in the bottom of the feed steam without switching off the side fittings from the vacuum. Steam penetrates to the surface of the product, reduces the vacuum pressure under the film and in the vacuum receiver, which is a signal for termination of the process of humidification steam. Thus, the product is heat treated in the initial stage of hydration, which leads to high effect Ter the products.

There is a method of making a hard cement-sand and silicate concrete mixtures in inkjet continuous mixer /auth.St. USSR N 265767 class. B 28 C 5/06, 1970/, including two-stage moving components of the concrete mix.

In the mixing process in the body of the mixer to create an electric field of 8 to 11 kV/cm To feed into the mixer sprayed binder is passed through the zone of corona discharge, and sprayed water particles pass through the electric field of direct current.

The disadvantage of this method is that water artificially dosed in contrast to the process sumanasiri.

There is a method of electrotorture bulk items /Booth A. I. Based electronic technology building materials, M, stroiizdat, 1973, 140-142 C./, including the interelectrode space, limited coronarium electrode and the surfaces of the four vertically mounted, interconnected conveyor belts driven by an electric motor, which is uniformly multi-channel nozzles serves occasioanly basic materials are precipitated on the surface of a moving conveyor to form a layer formed volumetric tx2">

A method of producing cast iron castings in vacuum sand forms /Handbook of cast iron casting. Edited by Professor N. G.The Girshovich, M. engineering, 1978, S. 473/, including the use of dry sand without binder, which is pressed and held in the support by means of the synthetic polymer films and vacuum.

The disadvantage of this method is that without a binder and water it is not applicable for the manufacture of concrete products.

The objective of the invention is to eliminate the disadvantages of the known methods, as well as cheaper and versatility of the process, improving product quality and working conditions.

This task is achieved in that the molding is carried out in vacuum-form, fitted with fittings in the walls, and sit in the bottom, and the water saturation vapor is conducted through the bottom and normalized using the polymer film covering the form with half-finished.

A method of manufacturing concrete products is as follows: before filing in the form of sprayed binder and sand pass through the zone of corona discharge, where the cement particles are deposited in a thin layer on the particles of sand thereby effecting uniform movement, and then through eleven is of the surface is covered with a synthetic polymer film, the edge of which is fixed with adhesive paper tape and through the fittings vacuum form. In the discharge in the dry mixture, it acquires the properties of a solid porous body. Then through the bottom feed steam without removing the fittings from the vacuum receiver for sucking gases. Pairs moisten the mixture to the top and releases the film, which is a signal to disconnect the vacuum receiver and steam.

The proposed method for the manufacture of concrete products allows the use of any binder for all products, reduce the cost of the process, to simplify the mixture preparation equipment, to increase the service life forms, to improve working conditions: gases are exhausted out of shape and not fall into the atmosphere of the shop, to eliminate the noise of shaking machines, to increase the precision manufacturing products and provide a high surface finish.

The method of manufacturing of concrete products, including packing in the form of dry ingredients, pre-mixed in an electrostatic field, crushing using a synthetic polymer film and vacuum and saturated steam, characterized in that the heat treatment and the saturation vapor are at the same time in a vacuum form, pokr

 

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FIELD: construction.

SUBSTANCE: in the method to manufacture granite-cement products from fine-grained concrete, including mixing within 1…5 min. of fine-grained filler - siftings of granite grinding with fraction of 2.5-5 mm, 0.315-0.63 mm and at least 0.14 mm with portland cement, water and plasticising additive - of series Glenium® ACE-430 on the basis of polycarboxylate ether, by vibration pressing of products from the produced mixture, with their subsequent hardening under normal conditions - air temperature - 15…20°C, air moisture - 90…100%, mixing is carried out in grinding-mixing mills with simultaneous vibration with pressure of rollers 0.02…0.05 MPa, vibration at frequency of vibrations 40…50 Hz and amplitude of oscillations 0.7…0.8 mm, and vibration pressing of products is carried out at frequency of oscillations 40-50 Hz, amplitude of oscillations 0.3-0.7 mm and pressure of pressing 3·10-3-6·10-3 MPa.

EFFECT: improved homogeneity of a concrete mix and uniformity of concrete properties with simultaneous increase of strength properties, wear resistance and frost resistance of products.

4 tbl

FIELD: construction.

SUBSTANCE: invention relates to construction and is intended for reliable and durable water-resistance of both aboveground and underground and underwater construction. Method of producing multilayer construction articles includes serial laying in form with sides of reinforcement mesh with anchor elements, concrete mixture, waterproof layer of elastic material in form of film. Vacuum pressure is created in space limited by form and film fixed to its sides. Hardening material of protective finishing layer is placed to embrace anchor elements with it. Wherein laying of concrete mixture is made separately: at first, coarse filler is supplied simultaneously with laying of reinforcement mesh, after vacuum creation hardening solution is supplied in pore space with simultaneous laying of protective-finishing layer material.

EFFECT: technical result is high efficiency of hydroprotection, improvement of strength of article.

1 cl, 2 dwg

FIELD: building units, particularly wall blocks made of non-autoclave cellular concrete produced in molds with inner detachable partitions of comb type.

SUBSTANCE: method involves assembling necessary number of partitions in single unit outside mold; lubricating thereof and simultaneously moving all partitions in mold with poured cellular concrete mixture. Device for above method implementation involves suspended perforated table with restricting walls and pressing screw arranged above oil reservoir, which may be temporary immersed in oil reservoir. Gripper includes horizontal frame and lifting members made as vertical console rods located perpendicular to frame and arranged under frame. Connected to lower rod ends are controllable rests to support partitions during their transportation and to release thereof if necessary.

EFFECT: reduced labor inputs and increased block quality.

15 cl, 15 dwg

FIELD: construction industry.

SUBSTANCE: the invention is dealt with the field of construction industry, in particular, with a method of heat treatment of monolithic thin-walled reinforced concrete constructions used for acceleration of solidification of monolithic concrete and reinforced concrete constructions of walls and floors. The technical result is reduction of power inputs and a cycle of heat treatment. The method provides for a heating of the air inside a closed space bounded by warmed up structures of walls and floors. At that indoors they create at least one closed local zone, bounded by a wall made out of soft sheet material, and air is heated beyond the limits of this zone.

EFFECT: the invention ensures reduction of power inputs and a heat treatment cycle duration.

12 cl, 1 tbl, 3 dwg

FIELD: building, particularly underground or underwater structures.

SUBSTANCE: method involves building foundation; heating thereof before pouring concrete mix and performing concreting cast-in-place blocks by pouring concrete mix having different temperature along structure height; vibrating concrete mix; covering structure surfaces not enclosed by form with water-impermeable and heat-insulating material and curing thereof in form up to obtaining necessary concrete strength. Foundation is formed of piles arranged along tunnel wall axes. Foundation is heated up to 5 - 20oC. Concreting of members supported by wall piles is performed by filling form with concrete mix under temperature of 20 - 30oC up to level located at height exceeding height of wall component with 4 m-1 surface modulus by 500 mm. Remaining wall and floor structure parts are filled with reinforced concrete mix under 10 - 20oC temperature. Concrete of outer pile foundation area having 600 - 800 mm height measured from contact line with concrete mix is heated up to obtaining 0.28 - 0.3 R28 concrete strength. Form material and covering material have thermal resistance of 0.2 - 0.3 (m2·deg)/W. Form for forming wall components having 4 m-1 surface modulus are coated starting from bottom by material having thermal resistance of 0.2 - 0.5 (m2·deg)/W to improve warmth-keeping thereof. Height of form to be covered and concreting block height are determined from given formulae.

EFFECT: improved crack-resistance; increased erection rate due to increasing admissible dimensions of blocks to be concreted.

3 dwg, 1 ex

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