Cold patch asphalt mixture and preparation method thereof

Abstract

The invention discloses a cold patch asphalt mixture and a preparation method thereof. The preparation method comprises the following steps: heating and dewatering petroleum asphalt, then adding a diluent, a tackifier and an anti-stripping agent in sequence according to weight parts, uniformly mixing, and then adding waterborne epoxy emulsion and a waterborne epoxy curing agent, and uniformly mixing, thus obtaining cold patch asphalt liquid; uniformly mixing the cold patch asphalt liquid with an aggregate at 60 to 70 DEG C, thus obtaining a mixture A; and finally, adding mineral powder into the mixture A, uniformly stirring, thus obtaining the cold patch asphalt mixture which is used for repairing recesses in a pavement. By the adding of epoxy components, curing reaction of the epoxy components increases the strength increase speed of the mixture; and particularly, by the use of initial strength formation, after the cold patch asphalt mixture is paved, the load bearing capacity is relatively high, and the traffic can be quickly opened. The water stability and the high temperature stability of the cold patch asphalt mixture are improved to a certain extent; by high pavement performance, the service life of a novel cold patch material can be prolonged; and therefore, the pavement repair quality is improved, and occurrence of secondary damage to the pavement is reduced.

Description

technical field [0001] The invention belongs to the field of asphalt mixture, and relates to a cold patch asphalt mixture and a preparation method thereof. Background technique [0002] With the rapid growth of the national economy, more and more attention has been paid to traffic construction, and the total mileage of highways in our country is increasing year by year, which is of great significance to the economic development and national security of our country. By the end of 2016, the total mileage of my country's highways had reached more than 4.85 million kilometers, of which expressways accounted for more than 2.6% of the total mileage, exceeding 130,000 kilometers. Asphalt pavement has the characteristics of safety and comfort, low driving noise, easy maintenance, fast passage, and low construction cost, and has become the main pavement form of highways and urban roads in my country. However, due to the temperature-sensitive characteristics of asphalt materials, the...

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Problems solved by technology

At present, a lot of research and application of cold-patch materials have been done at home and abroad, and remarkable results have been achieved, but there are still some problems: foreign cold-patch asphalt products have excellent performance, but the price is high, which limits the introduction of key technologies and product promotion; Cold-patch asphalt mixture products in the domestic market are uneven, and the performance is not stable enough. There are generally low early strength, slow forming speed, poor durability, and short service life. The research on cold-patch asphalt materials is not deep enough and comprehensive. , the evaluation methods and technical indicators for the performance of cold patching materials are not uniform enough, and there is a lack of relevant industry standards or regulations. This series of reasons greatly limits the popularization and application of cold patching technology in road maintenance projects

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