METHOD FOR WATERPROOFING RIGID AIRFIELD AND ROAD COATINGS FROM CONCRETE PLATES Russian patent published in 2023 - IPC E04B1/64 

FIELD: construction.

SUBSTANCE: method for treating airfield and road coatings. The invention can be used in the repair of rigid (cement concrete, fibercrete and reinforced concrete) airfield and road coatings to restore the waterproofing layer on them and prevent their destruction. The problem to be solved by the claimed technical solution is the development of an effective method for restoring and waterproofing rigid airfield and road coatings. A method for waterproofing rigid airfield and road surfaces from concrete slabs includes electroosmotic removal of moisture by installing electrodes made in the form of sheet iron plates and supplying a waterproofing composition simultaneously with connecting an electric current. The seam cavities, surfaces and edges of the slabs are pre-cleaned and dried, after which an electrode with a wire is placed in the seam adjacent to the surface of the slab to be treated so that the distance from the top edge of the electrode to the surface of the slab is at least 2 cm. Elastic sealing cord is installed above the electrode in the seam. Then the water-repellent composition is supplied to the day surface, after which an electrode with a wire is placed on the surface of the slab treated with the water-repellent composition. The electrodes are kept under direct current until the water-repellent composition is completely absorbed, after which the electrode polarity is reversed and they are kept under constant current again. After impregnation is completed, the electrodes are removed, the slab is dried and swept with compressed air, and the seam cavities are treated with airfield sealant. It is preferable that the joint cavity is cleaned using mechanical means, followed by removal of cleaning waste, and the surface and edges of the slabs are cleaned using high-pressure water jets until the initial light gray color of the concrete is obtained. It is preferable that the electrodes are placed in the seam end thrust, and the elastic sealing cord in the seam above the electrode is installed by wedging. It is preferable that the wire from the electrode installed on the surface is connected to the anode, and the wire to the electrode installed in the seam is connected to the cathode. It is preferable that the water-repellent liquid be supplied to the day surface of the slab in an amount that ensures impregnation of the slab and the formation of a layer 3-5 mm thick on its surface. It is preferable that the electrode plates are placed in close contact with the mating surfaces. It is preferable that the processing of slabs whose overall dimensions exceed 3.75×5 m, was carried out in parts, including one of the cleaned seams and the adjacent area of the day surface of the slab with a width of 1.50-3.50 m and a length equal to the adjacent cleaned seam. It is also preferable that the electrodes are connected to the wire using a bolted connection. It is preferable that the electrodes are placed in the seam end thrust.

EFFECT: improving the quality of waterproofing and increasing the operational service life of restored rigid (cement concrete, fibercrete and reinforced concrete) airfield and road coatings.

8 cl