Scumbling type polyurethane waterproof paint and usage method thereof

Abstract

The invention provides a scumbling type polyurethane waterproof paint and a usage method thereof. The polyurethane waterproof paint comprises a seal primer, a polyurethane waterproof bottom surface paint and a polyurethane waterproof surface paint, wherein polyurethane waterproof bottom surface paint comprises an A1 component and a B1 component; the A1 component comprises 40-60 parts of polyether polyol, 13-28 parts of titanium dioxide, 13.9-19.9 parts of a filler, 2.1 parts of a coalescing agent and 10 parts of a solvent by weight; the B1 component comprises 40-60 parts of isocyanate and 0-20 parts of a solvent by weight; the polyurethane waterproof surface paint comprises an A2 component and a B2 component; the A2 component comprises 40-60 parts of polyether polyol, 22-37 parts of titanium dioxide, 6.5-12.5 parts of a filler, 2.5 parts of a coalescing agent and 8 parts of a solvent by weight; and the B2 component comprises 40-60 parts of isocyanate and 0-20 part of a solvent by weight.

Description

technical field [0001] The invention relates to a waterproof paint, in particular to a thin-coated polyurethane waterproof paint and its application method. Background technique [0002] The waterproof layer of railway concrete bridge deck is an important technical means to improve the durability of bridge structure. my country's railway concrete bridge deck waterproof layer standard TB / T2965-2011 "Technical Conditions for Railway Concrete Bridge Deck Waterproof Layer" stipulates three waterproof layer types, namely: coiled material plus paste coating (or adhesive) type, polymer modified permanent asphalt coil type and non-coiled coating type. The first two waterproof layers are used inside the protective wall on the bridge, and the third waterproof layer is used outside the protective wall. None of these three waterproof layers can be used bare, and it needs to be covered with a 40-60mm C40 fine stone concrete protective layer mixed with acrylic nitrile fibers or polypropy...

AI Technical Summary

Problems solved by technology

[0003] At present, polyurea waterproof materials are usually used for concrete bridge decks of high-speed rail ballastless tracks. Although this waterproof material can be used bare, its adhesion to bridge decks is poor, and it is prone to discoloration, cracking, and large-scale peeling off. Thereby neither can achieve due waterproof effect, is not conducive to driving safety

In addition, when polyurea waterproof material is used as the waterproof layer, it is usually necessary to use specific spraying equipment for construction, which is inconvenient to use; and in order to achieve the waterproof effect, the concrete bridge deck usually needs to be sprayed with a thicker polyurea waterproof layer (thickness is usually at 2mm or more), the amount of polyurea waterproof material required is large, which is not conducive to saving raw materials and reducing costs

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