CS270315B1 - Method of water-contaminated building structures' additional drying - Google Patents

Abstract

Method of additional drying of construction waterlogged structures waterproofing curtains g chemical means by which infusion is filled drilling, consisting in being a chemical the means will use organosilicon compounds of the general formula RnSiX4-n_2mYm ' wherein R is alkyl of 1 to 10 carbon atoms or C 6 aryl, X is OR, where R is alkyl of 1 to 10 carbon atoms or C 6 aryl, n is 1 to 1 3, Y is oxygen and m is 0 to 1.5, in organic solvent or aqueous emulsion and an aqueous silica colloidal solution, containing medium-sized particles 10 to 20 millimeters, alkali-free.

Description

CS 27o3l5 B1 1

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of additionally displacing building structures with permanently wetted water, 1

Previous methods of forming waterproofing screens. in building structures against rising dampness from subsoil by chemical means are essentially of two types.

The first type utilizes the sealing properties of a silica gel made of waterglass or a non-alkaline colloidal silica solution, with the addition of a hydrophobic composition that fills the vapors in the building material. These compositions seal the building structure against water under hydrostatic pressure. Their major disadvantage is the low penetration capacity of the fine pairs of masonry, which can further dampen the moisture resulting in unsuccessful use in some types of building materials. A second major disadvantage of the often used water glass, potassium or sodium, is the introduction of alkali salts into the masonry structure which can, on the one hand, mobilize calcium ions to dissolve, on the one hand, by reacting with carbon dioxide and sulfur dioxide from the air to carbonates and sulfates causing not only aesthetic defects by the emergence of efflorescence, by the aggressiveness of 1, the mechanical properties of the building material were disturbed, the means of this type of illusion are listed, for example, in Czechoslovakia, author's certificate no. 199 97S, 17o S73, 147 S94 and 2o6.284,

A second type of infusion agent is a hydrophilic solution of a predominantly organosilicon substance which does not seal or change the building material vapors, but prevents the capillarity of the water in the masonry system by forming a water-repellent wet layer on the walls. couples. The advantage of these devices is their excellent penetration ability, which allows penetration even into the finest pairs of building materials. The disadvantage is the possibility of water vapor diffusion not filled with steam and water penetration into masonry at hydrostatic pressure. auctions No. 23o 912 and 17o 873.

The combination of both above mentioned methods deals with two-phase infusion of infusion boreholes according to MS. No. 17o 873, wherein the ee vapor is first filled with a waterglass solution to form a quartz silica gel followed by an organosilicon-ester-based hydrophobic agent to hydrolyze the fine building material vapor. A disadvantage of this is the strong alkaline character of waterglass, which catalyses the hydrolysis and condensation of organosilicon esters, so that they almost immediately precipitate, and thus the possibility of penetrating into fine pairs of masonry is avoided.

The above-mentioned disadvantages are solved by the method of additional displacement of building structures watered by the formation of waterproofing screens from chemical means which are filled with non-ionic boreholes. 8 carbon atoms, X is OR ", where R 'is alkyl B 1 to C 1 carbon or aryl of 6 carbon atoms, n is 1 to 3, Y is oxygen and is 0 to 1.8, in an organic solvent or in an aqueous emulsion, and an aqueous caustic solution of silica containing alkali-free particles having a mean particle size of about 1 to about 2 millimeters, which forms a vapor-impermeable liquid water vapor in the vapor. A further advantage of the process according to the invention is that by forming a hydrophobic layer o the wheel of the precipitated silica gel prevents the evaporation of the gel water, and thus its cracking, which would lose its depletion function. The present method of forming waterproof screens eliminates all the significant drawbacks of the aforementioned compositions and methods, ie, the low penetration capacity and alkalinity of infusion solutions, while sealing the water vapor diffusion water I diffusion. It is suitable for all types of building, brick, stone and possibly reinforced concrete structures. the penetration ability of the hydrophobicorganosilicate solution to reduce the number of boreholes per 1 bm from the commonly used 6 to S to 4 boreholes, which is beneficial for both economic, operational and static reasons. Also, the percentage of unsuccessful intervention for poor quality work is reduced, because ready-to-use solutions are used, prepared by the manufacturer, and no mixing of individual components is required.

Claims (3)

Example 2 In a mixed, unplastered masonry of a historic building with a thickness of 80 cm, 5 holes are drilled at an angle of 6 mm to a depth of 6 to 7 cm in a bore of 35 mm in the post. After purification by means of an open-air purge from the fine debris resulting from drilling, each well is impregnated with 1 liter of a toluene solution of methylene phenyl siloxane at a concentration of 2% by weight. After two minutes, 2 liters of 23% aqueous colloidal silica solution were introduced into each well. The slower formation of the hydrophobic effect of methylphenylsiloxanes allows subsequent impregnation with an aqueous solution. Soak up the Infuenf solution with the holes and the lime-cement mortar. Example 2 For 6o cm brick masonry, the plaster is beaten up to 2o cm above the ground and the boreholes are made with a 2o ° slope at a height of 5 cm below the removed plaster to a depth of 3o cm in 4 boreholes per 1m masonry. In the other side, four alternate drill holes are made with half-way displacement between the openings on the outside. After cleaning the openings with compressed air, 2 liters of a 3% w / w aqueous colloidal silica solution are charged into each well from a separate vessel. After soaking, the flasks are filled with 75 liters of a solution of methyltrletoxyslan in ethyl alcohol of 2% by weight. I * o soaking the ethanol solution is filled with holes in the concrete. Example 5 Into a non-plastered cinder-block masonry of 6o cm, 5 holes per 1 m of masonry to a depth of 45 to 5 cm are drilled with a slope of 15 ° with a thickness of 35 mm. After purification by means of pressurized air, 6 liters of an aqueous emulsion of methylphenyleiloxane at a concentration of 2% by weight are filled. After the first infusion solution has been soaked, the wells are filled with 2 liters of 3% by weight aqueous colloidal silicon dioxide solution. After the infusion solution has soaked, the wells are filled with a concrete mix. OBJECT OF THE INVENTION A method of post-drying water-impregnated building structures by forming hydro-insulating screens from chemical means to fill infusion boreholes, using organosilicon compounds of the formula RnSiX4-n as chemical agents. 2mYm · where R is alkyl of 1 to 10 carbon atoms or aryl and 6 carbon atoms, X is OR, where R is alkyls 1 to 10 carbon atoms or aryl of 6 carbon atoms, n is the number 1 to 3, ¥ is oxygen and m is 0 to 1.5, in an organic solvent or in an aqueous emulsion, and an aqueous colloidal solution of silica containing particles having a mean particle size of 1 to 20 ml / ml alkali-free.