Asphalt material, asphalt mixture comprising same and preparation methods of asphalt material and asphalt mixture
A technology of asphalt mixture and asphalt materials, which is applied in the direction of building insulation materials, building components, buildings, etc., can solve the problems of large inherent shrinkage of asphalt and asphalt mixture, and achieve the effect of alleviating road surface cracking and reducing shrinkage performance
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[0016] Specific embodiment one: In this embodiment, an asphalt material is composed of asphalt, zirconium tungstate and silane coupling agent, wherein the mass ratio of asphalt and zirconium tungstate is 1: (0.1-1), zirconium tungstate and silane coupling The mass ratio of the agent is 100: (0.5-2).
[0017] In this embodiment, by adding a certain proportion of zirconium tungstate anti-expansion material to the asphalt, the shrinkage of the asphalt material is reduced, and the linear expansion coefficient is reduced to 3.5×10 -4 ~2.8×10 -4 ( / °C), using the asphalt material of the present invention for road construction can reduce the shrinkage performance of the asphalt pavement and alleviate road cracking.
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[0018] Specific embodiment 2: This embodiment is a method for preparing an asphalt material, characterized in that the method for preparing the asphalt material is carried out in the following steps:
[0019] 1. Weigh the pitch, zirconium tungstate and silane coupling agent. The mass ratio of pitch to zirconium tungstate is 1: (0.1~1), and the mass ratio of zirconium tungstate to silane coupling agent is 100: (0.5~ 2);
[0020] 2. Heat the pitch weighed in step 1 to 100-200°C, add the zirconium tungstate weighed in step 1 to it, and stir 0.5-0.5° at a temperature of 100-200°C and a stirring speed of 30-600 rpm. After 2h, add the silane coupling agent weighed in step 1, stir for 0.5-6h at a temperature of 100-200°C and a stirring speed of 30-600rpm, and cool to room temperature to obtain an asphalt material.
[0021] In this embodiment, asphalt mixing equipment is used for mixing. The asphalt in this embodiment is a commercially available ordinary road asphalt, and both zirconium tu...
Example Embodiment
[0023] Specific embodiment three: In this embodiment, an asphalt mixture containing the asphalt material described in the first embodiment is composed of 4% to 6% of asphalt material and 94% to 96% of aggregate according to mass percentage.
[0024] The shrinkage of the asphalt mixture in this embodiment is reduced, and its linear expansion coefficient is reduced to 3.0×10 -5 ( / °C), using the asphalt material of the present invention for road construction can reduce the shrinkage performance of the asphalt pavement and alleviate road cracking.
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