Cold patch asphalt mixture and preparation method thereof

A technology of cold patching asphalt and mixture, which is applied in the field of asphalt mixture, which can solve the problems of low early strength, limit the popularization and application of cold patching technology, and slow forming speed, so as to improve water stability and high temperature stability, and reduce pavement secondary Secondary disease, the effect of improving the quality of pavement repair

Inactive Publication Date: 2017-09-01
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 lo

Method used

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  • Cold patch asphalt mixture and preparation method thereof
  • Cold patch asphalt mixture and preparation method thereof
  • Cold patch asphalt mixture and preparation method thereof

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preparation example Construction

[0044] A preparation method for cold-patch asphalt mixture, specifically comprising the following steps:

[0045] 1), in parts by weight: 100 parts of base asphalt, 23-25 ​​parts of thinner, 3-5 parts of tackifier, 0.7-0.9 parts of anti-stripping agent, 3-4 parts of water-based epoxy emulsion, water-based epoxy curing 1 part of agent; first dehydrate the base asphalt, then add diluent, tackifier and anti-stripping agent in order according to the parts by weight and mix evenly, then add water-based epoxy emulsion and water-based epoxy curing agent and mix evenly to obtain cold-patch asphalt liquid;

[0046] 2), and then mix the cold patched asphalt liquid and the aggregate at 60-70°C to obtain the mixture A;

[0047] 3) Finally, add mineral powder to the mixture A and mix evenly to obtain the cold patch asphalt mixture.

[0048] Concretely, in step 1), first base asphalt is subjected to heat dehydration treatment,

[0049] Dilute the dehydrated base asphalt in the container ...

Embodiment 1

[0056] 1. In parts by weight, heat 100 parts of 70# road petroleum asphalt to about 130°C-150°C, then dehydrate and cool down to 110°C-120°C;

[0057] 2. Add 23 parts of 0# diesel oil to the dehydrated base asphalt in the container, stir while adding, use a high-speed shearer with a rotation speed of 2000r / min to stir for 10min to 15min, and keep the constant temperature at 100°C to 110°C to make a mixture B is ready for use;

[0058] 3. Add 3 parts of terpene resin and 0.7 parts of PA-I anti-stripping agent to the mixture B, through high-speed shearing or colloidal grinding, add while stirring to ensure that the additive can be fully dissolved in the diluted asphalt, and stir for 10 minutes to 15 minutes , at this time, the asphalt liquid should be cooled to below 100°C, and kept at a constant temperature of 80°C to 90°C to prepare mixture C for use;

[0059] 4. Add 3 parts of EP-20, 1 part of aliphatic polyamine and 1 part of 0# diesel oil to the mixture C, mix and stir in ...

Embodiment 2

[0064] 1. In parts by weight, heat 100 parts of 70# road petroleum asphalt to about 130°C-150°C, then dehydrate and cool down to 110°C-120°C;

[0065] 2. Add 23 parts of 0# diesel oil to the dehydrated base asphalt in the container, stir while adding, use a high-speed shearer with a rotation speed of 2000r / min to stir for 10min to 15min, and keep the constant temperature at 100°C to 110°C to make a mixture B is ready for use;

[0066] 3. Add 3 parts of terpene resin and 0.7 parts of PA-I anti-stripping agent to the mixture B, through high-speed shearing or colloidal grinding, add while stirring to ensure that the additive can be fully dissolved in the diluted asphalt, and stir for 10 minutes to 15 minutes , at this time, the asphalt liquid should be cooled to below 100°C, and kept at a constant temperature of 80°C to 90°C to prepare mixture C for use;

[0067] 4. Add 4 parts of EP-20, 1 part of aliphatic polyamine and 1 part of 0# diesel oil to the mixture C, mix and stir in ...

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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...

Claims

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Application Information

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IPC IPC(8): C04B26/26
CPCC04B26/26C04B2201/50
Inventor 张争奇张世豪路国栋王素青张伟许铖王志祥罗要飞李杨李卓琳杨建华黄硕磊
Owner CHANGAN UNIV
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