Low-temperature aromatic hydrocarbon oil road modified asphalt, and preparation method thereof

Abstract

The invention relates to a low-temperature aromatic hydrocarbon oil road modified asphalt, and a preparation method thereof. The low-temperature aromatic hydrocarbon oil road modified asphalt is prepared from an asphalt modification component A, a modification component B, and the like, and weight ratio of the asphalt modification component A to the modification component B is 20-25:80-75; EVA is shorted for ethylene/vinyl acetate copolymer; the content of VA is 41%. According to the preparation method, asphalt is delivered into a constant temperature modification device, and is heated to 165 DEG C; 3% of EVA, 0.2% of an aromatic hydrocarbon oil, an asphalt diluent, the asphalt modification component A, the modification component B, a cross-linking agent, and a catalyst are added; and an obtained mixture is subjected to 2.5h of Shear mixing using an agitator tank for modification at a temperature is controlled to be 165 to 170. Advantages of the preparation method are that: cheap coal and coke are taken as the asphalt modifiers, and traditional physical method is used for modifying common asphalt, so that high and low temperature performance of asphalt is improved greatly, combination with existing technology can be realized without adding any novel equipment, and cost of asphalt modification with coal and coke is reduced greatly.

Description

technical field [0001] The invention relates to a low-temperature aromatic oil road modified asphalt and a preparation method thereof. Background technique [0002] The high-temperature flow deformation of asphalt pavement is one of the pavement damage forms that are generally concerned by countries all over the world. In most parts of our country, the high temperature in summer can reach above 35-40 degrees, and the maximum temperature of the asphalt pavement is 25 degrees higher than the maximum temperature, which may reach above 60-65 degrees. The pavement is rapidly denatured and destroyed under the action of heavy traffic. Asphalt is a viscoelastic material. Under such high temperature conditions, the asphalt oil elastomer transforms into a plastic body, the stiffness modulus is greatly reduced, and the deformation resistance is sharply reduced. Therefore, the high temperature stability is always It is the most basic road performance of asphalt pavement, and rutting de...

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Problems solved by technology

[0010] In order to solve the problem of poor strain capacity of existing asphalt, the present invention provides a low-temperature aromatic oil road modified asphalt and its preparation method, wherein the asphalt modifier Component A and modifier component B, the weight ratio of A to B is 20-25:80-75; EVA is the abbreviation of ethylene-vinyl acetate copolymer, and the VA content is 41%. In the permanent device, heat to 165 degrees Celsius, then add 3% EVA, 2‰ aromatic oil, asphalt thinner, asphalt modifier A, B, crosslinking agent and catalyst, keep the temperature at 165-170 degrees Celsius, Use a mixing tank to shear and stir for 2.5 hours to modify

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