Method for preparing modified asphalt

Abstract

The invention discloses a method for preparing modified asphalt by coal direct liquefaction oil residue, wherein, 150 DEG C to 280 DEG C molten coal direct liquefaction oil residue and 100 DEG C to 180 DEG C molten base asphalt are mixed evenly at 150 DEG C to 280 DEG C to form liquid melt so as to obtain modified asphalt. With simple process, energy saving, environmental protection and high efficiency, the method improves the quality of modified asphalt.

Description

technical field

[0001] The invention relates to a method for preparing modified asphalt, in particular to a method for preparing modified asphalt by directly liquefying oil residue from coal. Background technique

[0002] Modern highway pavement uses asphalt as a binder, which enhances the cohesive force between mineral materials, improves the strength and stability of the mixture, and improves the quality and durability of the pavement. However, with the increasing flow of high-grade highways, obvious canalized traffic, high vehicle speed, increasingly heavy bearings, and the drastic temperature changes caused by my country's unique monsoon climate, the performance requirements of asphalt are getting higher and higher. Sufficient strength and thermal stability, sufficient elasticity and plasticity at low temperature. However, due to the high wax content of asphalt in our country, high temperature sensitivity, poor cohesive force, low elongation, poor thermal stability and l...

Examples

Embodiment 1

[0025] After heating and melting, C1 was added to the base asphalt J1 in the melting and stirring at a weight ratio of 3% (the modifier accounted for the weight percentage of the modified asphalt) and mixed evenly at 180°C. The test results are shown in Table 3.

Embodiment 2

[0027] After heating and melting, C2 was added to the base asphalt J1 in the melting and stirring at a weight ratio of 7% (the modifier accounted for the weight percentage of the modified asphalt) and mixed evenly at 200°C. The test results are shown in Table 3.

Embodiment 3

[0029] After heating and melting, C3 was added to the base asphalt J2 in the melting and stirring at a weight ratio of 20% (the modifier accounted for the weight percentage of the modified asphalt) and mixed evenly at 220°C. The test results are shown in Table 3.

technical field

[0001] The invention relates to a method for preparing modified asphalt, in particular to a method for preparing modified asphalt by directly liquefying oil residue from coal. Background technique

[0002] Modern highway pavement uses asphalt as a binder, which enhances the cohesive force between mineral materials, improves the strength and stability of the mixture, and improves the quality and durability of the pavement. However, with the increasing flow of high-grade highways, obvious canalized traffic, high vehicle speed, increasingly heavy bearings, and the drastic temperature changes caused by my country's unique monsoon climate, the performance requirements of asphalt are getting higher and higher. Sufficient strength and thermal stability, sufficient elasticity and plasticity at low temperature. However, due to the high wax content of asphalt in our country, high temperature sensitivity, poor cohesive force, low elongation, poor thermal stability and l...

Examples

Embodiment 1

[0025] After heating and melting, C1 was added to the base asphalt J1 in the melting and stirring at a weight ratio of 3% (the modifier accounted for the weight percentage of the modified asphalt) and mixed evenly at 180°C. The test results are shown in Table 3.

Embodiment 2

[0027] After heating and melting, C2 was added to the base asphalt J1 in the melting and stirring at a weight ratio of 7% (the modifier accounted for the weight percentage of the modified asphalt) and mixed evenly at 200°C. The test results are shown in Table 3.

Embodiment 3

[0029] After heating and melting, C3 was added to the base asphalt J2 in the melting and stirring at a weight ratio of 20% (the modifier accounted for the weight percentage of the modified asphalt) and mixed evenly at 220°C. The test results are shown in Table 3.