Hydrophobic emulsified asphalt waterproof coating and preparation method thereof

Abstract

The invention discloses a hydrophobic emulsified asphalt waterproof coating and a preparation method thereof, belonging to the technical fields of bridge decks and civil construction waterproof coatings. The coating comprises 45-50 parts of asphalt, 2-10 parts of a tackifier, 10-40 parts of a filler, 45-50 parts of a solvent, 0.6-1 part of an emulsifier, 20-30 parts of rubber powder, 10-20 parts of a stabilizer, 0.6-1 part of an anti-aging agent, and 45-50 parts of water. Due to the factors of the hydrophobic emulsified asphalt waterproof coating disclosed by the invention that a softening point is relatively high, cracking is not easy to occur at a low temperature, bonding strength is high, flexibility is improved, water is not easy to accumulate on a surface layer, a self-cleaning capability is strong and the like, the service life of a waterproof coating film is prolonged, the cost of subsequently clearing the surface layer is greatly reduced, and meanwhile the bonding with an upper-layer material is facilitated; the process method is simple in flow, and high in operability; and the hydrophobic emulsified asphalt waterproof coating and the preparation method can be used without transforming existing equipment, and the costs of equipment and raw materials are low, thereby having significant economic benefits, and being suitable for industrialized production. The hydrophobic emulsified asphalt waterproof coating and the preparation method disclosed by the invention can play a great role in the fields such as transportation and civil construction, and have a broad market prospect.

Description

technical field [0001] The invention relates to a hydrophobic emulsified asphalt waterproof coating and a preparation method thereof, belonging to the technical field of bridge deck and civil construction waterproof coatings. Background technique [0002] The use of waterproof coatings to stop water seepage and water leakage in buildings is a waterproof method that has just begun to be used in the late 1950s. In the mid-1950s, lime was used as an emulsifier to prepare petroleum emulsified asphalt. This kind of coating was mostly prepared on site, with unstable performance and poor application effect. Later, a series of products such as waterproof coatings with lime paste emulsified asphalt as the main raw material were developed. In the 1970s, bentonite emulsified asphalt waterproof coatings and water-based asbestos asphalt waterproof coatings were developed. These coatings have been widely used in waterproofing projects, but these coatings are either due to poor quality and...

AI Technical Summary

Problems solved by technology

In the mid-1950s, lime was used as an emulsifier to prepare petroleum emulsified asphalt. This kind of coating was mostly prepared on site, with unstable performance and poor application effect. Later, a series of products such as waterproof coatings with lime paste emulsified asphalt as the main raw material were developed. In the 1970s, bentonite emulsified asphalt waterproof coatings and water-based asbestos asphalt waterproof coatings were developed. These coatings have been widely used in waterproofing projects, but these coatings are either due to poor quality and short service life of the waterproof layer. Environmental pollution does not meet the requirements of relevant standards, which has a serious impact on the health of construction workers, and the current dosage is less and less

[0003] Although there are many types of emulsified asphalt modified waterproof coatings, and a lot of research has been done at home and abroad, at present, modified emulsified asphalt waterproof coatings will encounter some unique problems in the actual use process, mainly reflected in: (1 ) The bonding strength with the cement base is low, which leads to easy falling off; (2) The softening point is low, and after construction, it is easy to stick to the tire in a high temperature environment; (3) The low temperature stability is poor, and it is easy to appear Cracks, causing waterproof hidden dangers

According to JC / T975-2005 "Waterproof Coatings for Roads and Bridges" and "Highway Engineering Quality Inspection and Evaluation Standards", the relevant inspections cannot fully guarantee the quality of the project, and its bond strength and stability cannot meet the requirements, greatly shortening bridges and other buildings. service life

[0004] At the same time, the existing modified emulsified asphalt waterproof coating film is easy to pollute and collect water droplets due to factors such as high surface finish, large surface energy, and poor self-cleaning ability, which greatly reduces the actual waterproof effect and increases the follow-up construction. The cost of cleaning the surface of the waterproof coating film, etc., has hindered the large-scale promotion and use of the existing modified emulsified asphalt waterproof coating.

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