Road and bridge waterproof coating of multi-polymer modified emulsified asphalt and preparation process

Abstract

The invention relates to a road and bridge waterproof coating of multi-polymer modified emulsified asphalt and a preparation process. The preparation process comprises the following steps of preparation of polyvinyl alcohol solution, preparation of emulsion, preparation of emulsified asphalt and modification of emulsified asphalt, wherein a polymer for emulsified asphalt modification is a mixture of neoprene latex, vinyl acetate - ethylene copolymer emulsion, white latex, acrylic emulsion and a modified resin. The coating prepared by the invention has an excellent overall performance, has a higher solid content while improving adhesion and shear properties, has a stable performance, can fully meet the special waterproofing requirements of the asphalt concrete bridge deck, and has a lasting and reliable waterproof performance; and the product can be used for waterproof materials of high-grade highways, heavy traffic road surfaces and roads and bridges, and waterproof materials of bridges and tunnels and underground engineering, and can also be used for a filling material of a special structural deformation joint. The material is especially suitable for day-to-day maintenance and upkeep of the high-grade highways and the heavy traffic road surfaces.

Description

technical field [0001] The invention relates to the field of waterproof coatings, in particular to a water-based environment-friendly waterproof coating specially used for roads and bridges and a preparation process thereof, which uses various high-quality high-molecular polymer modified emulsified asphalt as base materials. Background technique [0002] In recent years, my country's road construction has developed rapidly, the road grade has been continuously improved, and the proportion of bridge structures is increasing. As an important link of the road, the normal use of the bridge plays a very critical role in the operation of the road. The road and bridge deck pavement built in the early 1990s in China basically does not have a waterproof layer, and the asphalt concrete pavement layer of the bridge deck has serious damage, cracks, pits, bulges and other early failure phenomena, which seriously affect the use of the bridge. Life and driving comfort and safety. Theref...

AI Technical Summary

Problems solved by technology

[0005] At present, only CN03131701.4 patent literature discloses a preparation method of road and bridge waterproof coatings, but the overall performance of the prepared waterproof coatings is poor, and it is not suitable for daily maintenance of high-grade roads and heavy traffic roads.

[0006] In the past, SBS (styrene-butadiene rubber) or APP (random polypropylene) modified asphalt waterproof membranes were often used in the construction of road and bridge waterproof layers in my country. The main reason is that APP waterproof membranes have higher tensile strength and can withstand high temperatures of 150°C, but Due to the cumbersome construction of waterproof coiled materials, improper construction will cause the separation and shelling of the pavement layer, which is rarely used at present; neoprene modified emulsified asphalt is a waterproof coating with a large amount and wide application in the market, but due to modification The selection, dosage and preparation process of the agent, the current products are difficult to improve the technical indicators of solid content, heat resistance and elongation at break at the same time, and the product performance of each factory has its own emphasis, so a chlorine with excellent comprehensive performance Butadiene latex asphalt is urgently needed by the market; and the existing production process often adopts the secondary heat mixing method, which has the problems of complex process and high production cost