Anti-cracking asphalt and preparation method thereof

Abstract

The invention relates to the field of asphalt, and discloses anti-cracking asphalt and a preparation method thereof. The anti-cracking asphalt is prepared from the following raw materials in parts byweight: matrix asphalt; a modifier; a filler; antioxidant. The preparation method comprises the following steps of: S1, mixing the matrix asphalt with the antioxidant in proportion, stirring for 30-60minutes, and making an obtained mixture stand still after performing stirring to obtain a primary mixture; S2, adding the modifier into the primary mixture in proportion, stirring for 30-40 minutes,and making an obtained mixture stand still after performing stirring to obtain a secondary mixture; and S3, adding the filler into the secondary mixture according to the proportion, and stirring for 30-60 minutes to obtain the formed anti-cracking asphalt. The anti-cracking asphalt disclosed by the invention has excellent elasticity and toughness, so that the damage delaying or fracture resistanceof an asphalt pavement under the load action of a large-load vehicle can be enhanced, and the service life of the asphalt pavement is prolonged to a certain extent. In addition, the preparation method is easy to operate, preparation conditions are easy to achieve, and large-scale popularization of the preparation method can be achieved.

Description

technical field [0001] The application relates to the field of asphalt, and more specifically, it relates to a crack-resistant asphalt and a preparation method thereof. Background technique [0002] Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a kind of high-viscosity organic liquid, which is divided into natural asphalt, coal tar pitch and petroleum asphalt. Asphalt is widely used in coatings, plastics, rubber, road surfaces and other fields due to its abundant reserves and excellent performance. [0003] Asphalt concrete, as an asphalt pavement material, has to bear the repeated action of running vehicle loads and the long-term impact of environmental factors during its use. [0004] As one of the evaluation parameters of asphalt properties, toughness can measure the ability of asphalt to delay failure and resist fracture after tensile yield. Asphalt concrete, as an asphalt pavem...

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Problems solved by technology

[0005] With regard to the related technologies mentioned above, the inventor believes that during the use of asphalt pavement, especially the asphalt pavement near a large factory (such as a gravel plant with a sand truck with a larger load-carrying vehicle), in the long-term use process, due to The toughness of asphalt is insufficient, and the asphalt pavement is prone to deformation or even fracture due to load

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