CS256964B1 - Method of hydroinsulating layer formation on surface of building element or structure - Google Patents

Abstract

On the surface of the building element or with an aqueous solution % resol 5 to 80% by weight with an addition of 0.5 to 10% by weight formic or acetic acid amide and allowed to cure at a higher temperature than 0 ° C. Curing is accelerated by that a structural element or structure covered with resol layer cellulose-based films or their derivatives or based on other polymers. This method is particularly advantageous for protection of concrete bottom parts structures against ground moisture and precipitation water; its advantage is simplicity, material and labor savings.

Description

The invention relates to a method of forming a waterproofing layer on the surface of a building element or structure.

A building structure or element in the usual sense of the word is partially absorbent and permeable, but not entirely frost-resistant, and water can cause its destruction generally by corrosion or freezing.

Various methods are generally used to protect a building element or structure against water, generally based on additional or previously laid layers of bituminous, plastomeric, elastomeric or gravel polymer cementitious materials of high cost and labor intensity. These waterproofing layers often need to be protected from the outside against mechanical or thermal damage, for example, by expensive brickwork or polymer nonwoven.

Also, waterproofing is laboriously and costly carried out by impregnation with monomers followed by polymerization initiation. During the impregnation there is a considerable loss of monomer by evaporation (about 30% to 50% by weight) with a significant negative impact on the environment and the impregnated surfaces are laboriously treated by pre-drying or vacuuming.

The above-mentioned disadvantages are eliminated by the method of forming waterproofing layers based on a composite of a building element or structure and a cured resol according to the invention, which consists in that an aqueous solution of a resol is applied to the undried and unvacuated surface of the building element or structure. with a dry weight of 5 to 80% by weight containing from 0.5 to 10.0% by weight of formic or acetic acid amide (formantide, acetamide) as the initiator curing initiator at temperatures above 0 ° C.

Thereafter, the initiated resol-saturated surface of the building element or structure is preferably covered with a thin-film cellulose-based material or its derivatives or other polymers (polystyrene) to prevent loss of resol by evaporation during the curing process.

After the resol has cured, a multi-millimeter waterproofing layer of the building element or structure composite is formed on the surface of the building element or structure - resit, resistant to water penetration up to about 0.2 MPa and mechanical and thermal damage and protected in addition by resit cured thin film material. additional waterproofing protection. This can be used especially for protection of the lower parts of concrete structures against ground moisture and rainwater. The method is undemanding and simple, saving material and labor.

The method of forming a waterproofing composite layer is explained in more detail in the following examples:

He did

The outer surface of the building element should be provided with a firmly adhering waterproofing layer. For this purpose, a paint-initiated resol solution consisting of:

phenol formaldehyde oligomer 5.0 wt.% water 94.5 wt.% formamide 0.5 wt.%

The solution was applied at 0.5 kg / m 2. The layer of initiated resol was then covered with a cellulose acetate sheet at a thickness of 0.1 mm. After curing for 7 days at 30 ° C, a few millimeter-meter composite layer was formed on the surface, protected by cured cellulose acetate, resistant to pressurized water up to 0.2 MPa and not requiring subsequent mechanical and thermal protection.

Example 2

The outer surface of the building structure should be provided with a firmly adhering waterproofing layer.

For this purpose, a spatially initiated resol solution consisting of:

cresol formaldehyde oligomer 80.0 wt% water 10.0 wt% acetamide 10.0 wt%

The solution was applied at 1.0 kg / m 2. The layer of initiated resol was then covered with a 0.2 mm thick polystyrene film. After curing for 5 days at 25 ° C, a few millimeter-meter composite layer, protected by cured polystyrene, was formed on the surface of the structure, resistant to the ingress of pressurized water up to 0.2 MPa and not requiring subsequent protection.

This method is particularly suitable for insulating substructures, whether residential, civil or industrial, against moisture and earth or rainfall.

object of the invention

Claims (2)

object of the invention A method of forming a waterproofing layer on a surface of a building element or structure, characterized in that an aqueous solution of resol having a dry weight of 5-80% by weight with the addition of 0.5-10% by weight of formic or acetic acid amide is applied to the concrete surface and allowed to cure temperature above 0 ° C. 2. The method for forming a waterproofing layer according to claim 1, characterized in that after application of the resol solution, the surface of the building element or structure is preferably covered with a cellulose-based film or its derivatives such as acetellulose or other polymers such as polystyrene.