SU1416635A1 - Arrangement for drying laid stones and bricks - Google Patents

Abstract

Apparatus for reducing dampness in masonry using a combined electrode, consisting of a plastic shell (1), a steel bar (2), a cover plate (3). a discharge aperture (4), and burnt lime (6). The apparatus provides a combination of a number of effects such as chemical and hygroscopic affinity of the burnt lime to water, accompanied by the electrolytic decomposition of the water, electrolytic movement of the soluble salts present in the masonry and electrosmotic movement of the water. At the same time calcium ions are introduced into the masonry and consolidate it. <IMAGE>

Description

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The invention relates to a device for drying stone and masonry damaged by moisture, in particular, residential houses, and in one working operation soluble salts are chemically and electrolytically removed from soluble stone and brick, while masonry is enriched with calcium cations.

The closest to the proposed technical essence is a device for drying stone and masonry, including electrodes located in holes drilled in the masonry and filled with material (household patent GDR patent No. 78872, class E 04 B, 1971).

Fig, 1 shows a chute with an electrode; FIG. 2 shows a fragment of the clutch with an installed electrode.

PRI-EMER. The family house was desalted and dried, which for decades was exposed to the harmful effects of moisture and a significant degree of salinization, and in the basement zone a moisture content of 25% by weight. For this purpose, below the basement overlap, drill holes with a diameter of 45 mm, a depth of 150 mm and a distance of 700 mm. Powder-free lime is filled with pneumatic pressure into these holes. Thereafter, a combination electrode is inserted accordingly. The steel rod of the electrode 2 to make contact with the masonry or brickwork 5 is moved through the plug 3 into the stone or brick masonry 5, until it is covered with burnt lime 6,

After five days, the solution begins to run off from CaCl and CaOH) through the notch A,

The quicklime 6 is now hydrated and has a paste-like consistency. When the solution starts flowing through chute 1, a voltage of 40 V is applied to the anode installation through an adjustable rectifier followed by connection to two ground rods, which work as the cathodes, At the beginning of desalting and drying, a current of 280 mA passed, followed by a decrease after six weeks to 40 mA,

During this period of time, the following desalting and drying parameters were achieved, presented in tables

Content Wbg Bbmie basement floor18, 89.2

Water content

1.00 m higher

basement floor 23.9 5.8

Water content below the basement floor 24.9 4.2

The average chloride content in the entire brick or masonry 0,029 0,007

The use of a device for drying stone and brickwork provides a combination of several effects, namely chemical and hygroscopic means of quicklime in relation to water, with simultaneous electrolytic decomposition of water, electrolytic transfer of soluble salts and electroosmotic water transfer. At the same time, calcium ions are introduced into masonry and masonry, which results in strengthening of masonry or masonry, provides a convenient installation of the device, and quick work with partial reuse of electrodes.

The proposed method can be applied to all known architectural styles and building materials, first of all it is intended for stone and brickwork with strong salinization,

F o rm ula of the invention.

1, A device for drying stone and brickwork, including electrodes located in holes drilled in the masonry, characterized in that it is provided with grooves 1 with a plug 3 having a notch 4 at one end, and each electrode 2 is placed inside a corresponding groove

Claims (1)

1, installed in a borehole drilled in a laying, which has a slope towards the outer surface of the laying, and the plugs 3 of each trough 1 are flush with the outside surface of the laying 5, and the trough 1 and the borehole are filled with ground quicklime. 2, the apparatus according to claim 1, characterized in that the length of the grooves 1 and the electrodes 2 exceeds the length of the wells. - Recognized as an invention according to the results of the examination carried out by the Office for the Invention of the German Democratic Republic.