Preparation method of polymer waterproof cement-based cloth composite hard polyurethane insulation board

Abstract

The invention relates to the technical field of cold region tunnel heat insulation, and discloses a preparation method of a polymer waterproof cement base cloth composite hard polyurethane heat insulation board, which comprises the following steps: coating polymer waterproof cement paste on the surface of alkali-free glass fiber gridding cloth; and then pouring a polyurethane black and white material between the two layers of waterproof cement base cloth, foaming and curing to obtain the polymer waterproof cement base cloth composite hard polyurethane insulation board. The polymer waterproof cement paste is prepared by adding a certain amount of water, an acrylic polymer, a silane impregnant and a capillary crystalline waterproof coating in a cement mixing process and mixing. The preparation method of the polymer waterproof cement base cloth composite hard polyurethane insulation board is simple in production process operation, has the effects of fire prevention, flame retardance, water prevention, seepage prevention and protection of the surface layer of the polyurethane insulation board, remarkably prolongs the service life of the polyurethane insulation board, and has the advantages that the waterproof measures are compounded on the insulation board, so that the service life of the insulation board is prolonged. And partial construction procedures of the cold region tunnel thermal insulation layer are simplified.

Description

technical field [0001] The invention relates to the technical field of thermal insulation of tunnels in cold regions, in particular to a preparation method of a polymer waterproof cement-based cloth composite rigid polyurethane thermal insulation board. Background technique [0002] Tunnel construction in alpine regions requires an insulation layer and a waterproof layer between the primary support and the second lining to prevent various frost damage caused by water seepage and accumulated water. For example, frost heaving can increase the volume of accumulated water by 9% and give tunnel support Huge pressure changes the stress environment of the tunnel and endangers the stability and safety of the tunnel. [0003] The rigid polyurethane closed-cell foam insulation board commonly used in the existing insulation layer is easy to be bumped, broken and bruised during getting on and off the car or during transportation and installation. As the insulation material, its vapor pe...

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a polymer waterproof cement-based cloth composite rigid polyurethane insulation board and a preparation method thereof, which solves the problems existing in the prior art that the insulation board for tunnels is easily damaged and prone to Water seepage loses heat preservation effect and short service life

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