Application of rice hull ash as asphalt modifier

Abstract

The invention relates to an application of rice hull ash as an asphalt modifier. The test of three indexes of asphalt, the Bush rotary viscosity test and the DSR (dynamic shear rheometer) test prove that the rice hull ash asphalt modifier can effectively improve high-temperature deformation resistance and durability of asphalt cement and an asphalt mixture and guarantee certain low-temperature crack resistance. Therefore, diseases of asphalt pavements in high-temperature regions are effectively reduced, the asphalt pavements can adapt to complicated and changeable environmental conditions, and driving safety and service level are guaranteed. Besides, the microwave heating test and infrared thermal imaging photographing prove that compared with limestone mineral powder filler, the rice hull ash asphalt modifier enables the modified asphalt mortar to have an obviously higher microwave heat absorption temperature-rise rate, so that the rice hull ash asphalt modifier can be applied to technical research of the field of ice and snow smelting for the asphalt pavements.

Description

technical field [0001] The invention belongs to the technical field of asphalt modifiers, and in particular relates to the application of rice husk ash as an asphalt modifier. Background technique [0002] Asphalt pavement is widely used in road construction in our country, especially expressway construction, due to its advantages of comfortable driving, convenient construction, short construction period and fast construction speed. However, with the continuous development of the economy and society, the pressure on road transportation is increasing day by day, and the phenomenon of overloading is serious; in addition to the current global temperature rise, asphalt pavement due to high temperature, heavy load and channelized traffic, a large number of high-temperature permanent deformation diseases, such as ruts, have begun to appear. , moving, waves, hugging, etc., have seriously affected driving comfort and high-speed driving safety, greatly shortened the service life of t...

AI Technical Summary

Problems solved by technology

However, with the continuous development of the economy and society, the pressure on road transportation is increasing day by day, and the phenomenon of overloading is serious; in addition to the current global temperature rise, asphalt pavement due to high temperature, heavy load and channelized traffic, a large number of high-temperature permanent deformation diseases, such as ruts, have begun to appear. , moving, waves, hugging, etc., have seriously affected driving comfort and high-speed driving safety, greatly reduced the service life of the road, and posed a huge challenge to the high-temperature deformation resistance and fatigue resistance of road materials.

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