Method to erect brick walls of multistoried residential building under winter conditions

FIELD: construction.

SUBSTANCE: method to erect brick walls of a multistoried residential building under winter conditions includes masonry assembling works, floor-by-floor laying of stone structures using antifrost chemical additives. The building is divided into process units of 4-5 floors, at the same time the parallel construction process is in progress lagging behind the process of masonry erecting works by one floor and including installation of a stationary heating system of the erected block of floors, sealing of rooms with installation of designed window and door blocks into appropriate openings in building walls and preparation of wall surface to start a plastering cycle, at the same time a heating system is put in service for thermal treatment of a mortar joint in the erected block, the subsequent block is erected only after supply of heat into the internal volume of the erected block.

EFFECT: reduction and removal of possible process outages, and also considerable reduction of duration and cost of construction due to reduction of overhead expenses and power inputs for thermal treatment of masonry.

 

The invention relates to the field of building designs and technologies of construction of buildings and structures.

Famous traditional production technology of stone work in winter conditions, regulated SNiP 2-22-81 "Stone and reinforced masonry structures". According to it, the execution winter brickwork, stone of the correct shape and large blocks should be one of the following ways:

a) on the solutions of grade not less than 50 with antifreeze chemical additives that do not cause corrosion of masonry materials (potash, sodium nitrite, mixed supplements, supplements HKM), hardening in the cold without heating;

b) freeze method on ordinary solutions of grade not less than 10 and no chemical additives. While the structural elements must have sufficient strength and stability as in the period of initial thawing (at least strength vegeatables solution), and in the subsequent period buildings;

the method of freezing on ordinary solutions of grade not less than 50 without any chemical additives with the heating of structures constructed during the time in which the clutch reaches the carrying capacity sufficient for the loading of the overlying structures of buildings.

The downside is that the height of the stone structures erected by the method of freezing, not should is and to exceed 15 PM Pets performing the method of freezing foundations of low-rise buildings (up to three floors inclusive) of pastelitos stone laid "vraspor" with the walls of the trenches on solutions grade not lower than 25; to masonry of hollow concrete blocks and ceramic bricks by freezing is not allowed.

The closest to the technical essence and the achieved result is a method of construction of buildings on the solutions with chemical additives up to 5 floors, according to SNiP 3.03.01-87 "Bearing and enclosing structures". The method consists in the following: masonry is conducted in solutions with special chemical additives (potassium carbonate To technical2CO3(potash), sodium atomistically technical NaNO3(sodium nitrite), RRT (sulfide-yeast mash)); apply solutions grades not lower than the M-50; specifying additional requirements for the minimum strength of the solution (20% to 80%, depending on the height and type of used antifreeze additives). The disadvantage of this method is a significant difference in the dynamics of masonry works of the technological cycle and the process of curing the mortar joint, because "speed" masonry cycle of one floor of a multistoried building is 7÷10 days, while the required strength of the mortar bed at the chemical additive is of the same floor is reached at 50÷90 days.

As a consequence, the possible production downtime due to expectations set the desired strength of masonry previous floors, low floors of the building, as well as wasteful expenditure on temporary insulating device (usually disposable).

Object of the invention is the reduction and removal of possible technological disruption, and significant reduction in the duration and cost of construction by reducing overhead costs and energy consumption for heat treatment of masonry. Below are the essence of recommended technologies. The list "and operations"below, is typical of the "block floors of the building refers to the collection of short stories (4-5), merged in the process unit, where the main production processes are performed in a continuous mode when the "optimal" their combination. In particular, this "combination" refers to the production of stone erection and insulation of the interior and the heating with the design of the heating system of the building.

This task is solved in that in the method of construction brick walls of multi-storey residential buildings in winter conditions, including stone installation, floor laying masonry structures using antifreeze x the chemical additives according to the invention, the building is divided into technological blocks 4-5 floors, if this is the parallel construction of the flow behind the flow of stone and installation works on one floor, including installation of a stationary heating system of the building block floors, sealing areas when installing the design of window and door blocks into the corresponding openings of the walls and surface preparation of walls to the beginning of the finishing cycle. As antifreeze chemical additives used Lignospan BL-4U and NORD-Polyplast, providing moderate hardening of the mortar based on cement at a rate of around 25-30% of nominal strength for 40 days of curing at ambient temperatures under these conditions from minus 5°C to -25°C (short minus 30°c).

The proposed method works as follows:

Masonry walls and partitions of the building comply with a subsequent heat treatment mortar seam by means of a stationary heating system of the building, mounted in parallel with the process of masonry floors. While the building is divided into blocks comprising 4-5 floors, blocks connected to the heating, insulation block floors masonry provide sealing openings of the design window and door packages, monolithic joints between slabs of concrete mixtures on antifreeze additives.

As capping and connect another block to the heating cha the th sample is introduced into the warm zone and continues to gain strength in Overdrive mode. These blocks measure temperature and humidity.

Control the strength of masonry mortar is carried out by the fence of the solution from the mixer to the multi-cassette for producing samples-cubes. After daily exposure cassette replublicans and samples stored in ambient conditions (unheated special room) and gaining strength low rates due to antifreeze additives.

The time interval 40 days corresponds to the time spent on the site in the average performance of the installation of the 4 floors of the house. Load from four to five floors, including the weight of the masonry and floor slabs, balanced with the strength of the solution ≈1/4-1/3 of the design of the brand (50-80 kg/cm2) and the carrying capacity of masonry in General.

Subsequent capping block home in 4-5 floors and the heat in this volume implements the accelerated hardening solution with access to the level of strength of 70-100% of the project, which almost completely removes the question about the possibility of mounting the subsequent floors at home in 4-5 floors on the criterion of reliability.

The proposed technology allows to build a residential high-rise buildings, at any time of the year, not limited to the spring-summer season. The use of integrated antifreeze additives of the last generation, combined with local heating of the premises poses is of Olite dial mortar seam necessary strength and prevent possible production downtime.

The method of construction brick walls of multi-storey residential buildings in winter conditions, including stone installation, floor laying masonry structures using antifreeze chemical additives, characterized in that the building is divided into technological blocks 4-5 floors, this is a parallel construction of the flow behind the flow of stone and installation works on one floor, including installation of a stationary heating system of the building block floors, sealing areas when installing the design of window and door blocks into the corresponding openings of the walls and surface preparation of walls to the beginning of plaster cycle, thus give effect to the heating system to heat treatment mortar seam cocked block, the next block erected after the filing of heat into the inner volume of the built block.



 

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FIELD: construction.

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EFFECT: provision of heat-shielding properties of erected wall and masonry manufacturability, reduction of erected wall thickness and lower consumption of masonry mortar.

4 cl, 1 tbl, 6 dwg

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