Joint filling glue for road maintenance and preparation method thereof

Abstract

The invention belongs to the field of asphalt pavement maintenance of roads, and specifically relates to joint filling glue for road maintenance and a preparation method thereof. The joint filling glue comprises the following components in percentage by weight: 6-8% of a modifier, 15-19% of an assistant additive and the balance of petroleum asphalt. The petroleum asphalt is any one of 70# matrix asphalt and 90# matrix asphalt. The modifier is a styrene-butadiene-styrene segmented copolymer or a mixture of the styrene-butadiene-styrene segmented copolymer and butadiene styrene rubber. The assistant additive is a mixture of more than two of cut four line oil, rubber powder, polyolefin, dibutyl phthalate, used oil and diatomite. The joint filling glue provided by the invention is reasonable in formula and better in high-temperature stability and anti-aging performance, can satisfy high-and-low temperature performances, and can be used as a road maintenance material for different climates and road conditions.

Description

technical field [0001] The invention belongs to the field of road asphalt pavement maintenance, and in particular relates to a joint filler for road maintenance and a preparation method thereof. Background technique [0002] Due to the continuous development of my country's transportation industry, especially the construction of a large number of high-grade highways, the mileage of asphalt roads has increased rapidly. However, under the action of heat, oxygen, light and cold and hot cycles under natural climate conditions, asphalt pavement is prone to cracks, potholes and other diseases. For the cracks in the asphalt pavement, if they are not filled in time, the damage of the asphalt pavement will be increased under the action of rainwater and traffic load, and the service life of the pavement will be reduced. Therefore, in order to improve the quality of the pavement and prolong its service life, the cracks in the asphalt pavement must be repaired in time. [0003] The us...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the gap fillers used in China are imported from abroad, such as the D series products of American Aiteyi International Company, etc. This type of gap filler has strong bonding ability, good elasticity, large stretching capacity, insoluble in water, Excellent performance such as no water seepage, no flow at high temperature, no brittleness at low temperature, etc., but this type of joint sealant imported from abroad needs special construction equipment to match and use, and the maintenance cost is relatively high

At present, the domestic gap filler has the disadvantages of poor high temperature stability, low bonding strength with the old oil surface, poor aging resistance, etc., and the repair effect is not ideal.