CZ8687U1 - Hydrophobic composition intended for use as ingredient in building materials - Google Patents

Abstract

Hydrophobic preparation is made by unslaked powdered lime in amount of 90 to 94 % wt. and vegetable oil in amount of 6 to 10 % wt. Preparation method of the hydrophobic preparation consists of that 6 to 10 % wt. of vegetable oil is added by spraying with continuous mixing to the unslaked powdered lime in amount of 90 to 94 % wt. To the mixture prepared by this way 45 to 60 % wt. of water is added under the continuous mixing and when the hydration is finished, the mixture is spontaneously dried under the room temperature. Hydrophobic preparation is used as an additive to the building materials.

Description

Hydrophobic agent intended as an additive to building materials

Technical field

The invention relates to a hydrophobic composition which is intended as an additive to building materials.

BACKGROUND OF THE INVENTION

So far, moisture-proofing agents for buildings are known which are applied directly during construction work or afterwards.

Wildlife. PV 5165-87 solves the increased water-tightness of the cementitious compound by adding an asphalt or asphaltolatex suspension to the cement.

Wildlife. PV 7281-82 discloses a self-supporting plastic-based insulating zone which is used to secure interior building and industrial insulations against water and other liquids.

By wildlife. PV 4071-87, the waterproofing is solved by a coating composition which comprises magnesium hydrosilicates or salts of monocarboxylic acids and other additives.

PV 2582-86 discloses that a composition based on vinyl chloride ethyl methacrylate, chloroparaffin and other additives is used to increase the watertightness. '

Many formulations based on synthetic resins and acrylates are also known.

Hungarian Patent No. 69122 describes the use of free fatty acids or free fatty acid-containing additives to hydrophobize products containing lime, magnesium or barium. Free fatty acids or additives containing free fatty acids fill the free pores of the material and thereby increase its water resistance.

DE 240 004 discloses that, when gypsum is used, an additive consisting of a mixture of paraffin and resin is used to increase water resistance.

Patent AT 259 190 recommends the application of a diisocyanate solution to suitably solved holes in the masonry.

According to patent HU 165 711, it is recommended to use a mixture of an alcoholic solution of ethyl silicate and polyalkoxy-polydimethyl siloxane applied to the openings in the masonry for additional insulation.

HU 188 205 discloses a hydrophobizing composition consisting of a solution of sodium carbonate, sodium bicarbonate, magnesium sulfate, sodium hydroxide, potassium hydroxide and potassium hydrogen phosphate, which is injected into masonry.

HU 196 935 discloses a mixture of aluminum hydroxide, potassium waterglass, potassium hydroxide, colloidal silica and water, which is used for additional waterproofing. The mixture is applied into holes in the masonry.

HU 177 945 discloses an insulating fluid consisting of ethylene glycol acetate, respectively. diisocyanate synthetic resins in solution in methyl isobutyl ketone and toluene. This liquid is applied to the masonry, expands under the influence of moisture and prevents the re-penetration of moisture after complete curing.

Ingredients which, according to patent HU 195 459, are added to water and used in the production of mortar are:

(a) organic and inorganic salts of alkylbenzenesulphonic acid,

(b) alkyl sulfides;

(c) alkylphenol-polyethylene glycol ether;

(d) Semi-acetal or acetal formaldehyde-benzyl alcohol.

-1 CZ 8687Ul

For the preparation of the hydrophobization of the mortar according to the patent HU 195 459, a mixture of Portland cement, river sand and salts of alkylbenzenesulphonic acid or alkylphenol-polyethylene glycol ether or alkyl mercaptides or formaldehyde-benzyl alcohol acetal is used.

A disadvantage of the compositions used so far is that in the case of additional waterproofing, the masonry of the building must be drilled or / and the injection under pressure required, which may eventually lead to damage to the building. Another disadvantage is the ecological defect of these products and the formation of a large amount of flammable resp. explosive solvent vapors used in the treatment of masonry.

The essence of the technical solution

The disadvantages of the existing methods are eliminated by the hydrophobic composition according to the proposed solution, which consists in that it consists of quicklime in the amount of 90 to 94% by weight. and vegetable oil in an amount of 6 to 10 wt.

The vegetable oil may be sunflower or rapeseed oil.

The main advantage of the disclosed composition is its hydrophobic property, i.e., preventing the penetration of pressureless and pressurized water into the concrete or mortar. The product does not affect the setting and hardening of mortar and concrete, prevents cementing and agglomeration of cement during storage and transport, and facilitates pouring of cement from crates and conveyors by improving the slipperiness of the cement. The product is non-flammable and environmentally friendly, which allows its use in the food industry.

A further advantage of the proposed composition is its simple preparation and easy handling allowing the manufacture of the composition directly on site, which does not require any investment costs. In the case of additional insulation, it is not necessary to drill the masonry of the buildings or to inject under pressure, as the product is applied directly into the masonry.

The disclosed composition extends the shelf life of the cement and reduces the cost of cement packaging. Surfaces created using this composition have increased frost resistance and retain the properties of concrete.

Examples

Example 1 wt. % of the quicklime powder was mixed with 10 wt. of rapeseed oil. To this mixture was added 45 wt. water. After mixing and after the hydration of the lime accompanied by the release of a large amount of heat, the mixture is allowed to dry spontaneously at room temperature.

Example 2 wt. % of quicklime powder was mixed with 7 wt. sunflower oil. 60% wt. water. After completion of the reaction, the mixture was allowed to dry spontaneously at room temperature.

Example 3 wt. of cement is mixed with 8 wt. of a hydrophobic composition prepared according to Example 1. 1 part of this mixture and 3 parts of sand are used to prepare the cement mortar.

-2EN 8687 Ul

Example 4 wt. of cement is mixed with 8 wt. of a hydrophobic composition prepared according to Example 2. 1 part of this mixture and 3 parts of gravel are used to prepare the concrete.

Industrial applicability

The hydrophobic agent according to the proposed solution is used in the construction industry as an additive to building materials intended for insulation of buildings, swimming pools, water reservoirs, oversized concrete bathtubs, for reconstruction of renderings of old buildings, etc.

Claims (2)

PROTECTION REQUIREMENTS A hydrophobic composition for use as an additive in building materials, characterized in that it is a mixture of 90 to 94% by weight of a composition. % of quicklime powder and 6 to 10 wt. vegetable oil. Hydrophobic composition according to claim 1, characterized in that the vegetable oil is preferably sunflower or rapeseed oil.