Anti-rutting asphalt mixture and preparation method thereof

Abstract

The invention discloses an anti-rutting asphalt mixture and a preparation method thereof. The anti-rutting asphalt mixture disclosed by the invention comprises the following components in percentage by weight: 1.0-3.0% of an anti-rutting modifying agent, 4.0-6.0% of petroleum asphalt, 1.0-3.0% of cement, 1.0-3.0% of a mineral powder, and 85.0-93% of aggregates. The preparation method of the anti-rutting asphalt mixture comprises the following steps: heating a stirring kettle and the aggregates to be at a temperature of 125-150 DEG C for standby application, simultaneously adding molten petroleum asphalt, the aggregates, the cement, the mineral powder and anti-rutting modifying agent particles in the stirring kettle, and uniformly stirring the mixture so as to obtain the anti-rutting asphalt mixture. The specially-made anti-rutting modifying agent is added in the anti-rutting asphalt mixture, so that the dynamic rutting stability of a mixture vehicle is greatly improved, the anti-rutting performance of asphalt pavements can be obviously improved, and the anti-rutting asphalt mixture is particularly suitable for asphalt highways with heavy traffics and asphalt highways where rutting is easy to occur in high-temperature regions in the South of China.

Description

technical field [0001] The invention relates to an anti-rutting asphalt mixture and a preparation method thereof. Background technique [0002] Due to the increasing number of vehicles in our country and the heavy load of transportation, the phenomenon of rutting and wrapping on asphalt pavement is becoming more and more serious, especially in the hot areas in southern my country. This phenomenon has become one of the main damage forms of asphalt roads in our country, seriously affecting the driving safety, service level and service life of asphalt roads. [0003] As early as 1900, people began to use sulfur to modify asphalt to improve the anti-rutting performance of asphalt mixture pavement, but due to the high price of sulfur and the release of H 2 The problem of sulfur-containing gases such as S has restricted the development of sulfur-to-asphalt technology. Until the early 1980s, the sulfur-based modifier SEAM (sulphur extended asphalt modifier) ​​researched and produ...

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Problems solved by technology

The above two patents also need to heat and melt sulfur into a liquid state. The operating temperature is high, which will produce a strong pungent smell, which is not conducive to the environment and human health.

It can only improve the high-temperature performance of the asphalt mixture. The low-temperature cracking resistance and water damage resistance of the mixture still need to be improved, and the sulfur particles formed are also relatively brittle and easily broken during transportation and loading and unloading. Due to the friction between the particles, It will also produce more dust, which not only pollutes the environment, but also easily inhales the staff, endangering health.

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