Oil-proof asphalt composition and its preparing method

Abstract

The invention provides a storage-stable asphalt composition resistant to dissolution and erosion of fuel and oil products for roads and a preparation method. Base asphalt mixture with appropriate penetration and aromatic-rich distillate oil or coal tar is blended to obtain the base asphalt mixture. Under the condition of using a cross-linking agent, thermoplastic elastic rubber is added to the base asphalt mixture at 150-230°C to react for a period of time , then add ethylene-vinyl acetate copolymer and an oil-resistant resin to continue the reaction to form a stable asphalt composition. The asphalt composition provided by the invention has good storage stability, excellent fuel and oil dissolution and corrosion resistance, and excellent high and low temperature performance. It can be used for road paving, especially for road paving in airports, waste disposal sites, gas stations, oil tank farms, etc.

Description

technical field

[0001] The invention relates to an oil-resistant asphalt composition and a preparation method thereof, in particular to a road-use oil-resistant asphalt composition with stable storage and a preparation method thereof. Background technique

[0002] Asphalt material is used as a binder in the mixture of road paving. In order to meet the increasing demand of road construction, asphalt material not only has good viscoelasticity, plasticity and adhesion, but also often needs to meet the requirements of fuel (gasoline, diesel oil) , kerosene) and oil products (lubricating oil, engine oil, etc.) dissolution and erosion capabilities. Especially in airports, waste disposal sites, gas stations, oil tank farms and other places where the road surface is often exposed to spilled fuel and oil, asphalt will be dissolved and leached out of the mixture, making the asphalt pavement soft and bone The cohesion between the materials decreases, the pavement structure becomes loo...

Examples

Embodiment 1

[0022] The bitumen with a needle penetration of 961 / 10mm and a softening point of 43.4°C was selected as the base bitumen, and mixed with 8% phenol refined extract oil (fraction >350°C) based on the total weight of base bitumen and phenol refined extract oil to make a base bitumen mixture. Add 100 parts by weight of the above base asphalt mixture, 4 parts of linear SBS1301 (molecular weight 100000) and 0.13 parts of sulfur sublimation into the base asphalt mixture, mix at 170°C for 5 minutes under high shear force, and then add 2 parts of EVA28150 (VA content 28%, melt index 150) and 1 part ABS resin continued to react for 20 minutes to obtain a stable asphalt composition. Its properties are shown in Table 1. The composition is heat stored at 163° C. for 48 hours, and the difference in segregated softening point is 0.5° C. (tested according to the test method of ASTM D5976-96). at 3 # After soaking in aviation kerosene at room temperature for 24 hours, the penetration change...

Embodiment 2

[0024] The asphalt composition was prepared according to the method of Example 1, except that the amount of ABS resin added was 2 parts. Its properties are shown in Table 1. The difference in segregated softening point of the composition is 0.8°C. # After soaking in aviation kerosene at room temperature for 24 hours, the penetration changes by 23 units before and after oil immersion, and the mass change is less than 1%.

Embodiment 3

[0026] The asphalt composition was prepared according to the method in Example 1, except that the amount of thermoplastic elastic rubber SBS1301 added was 5 parts. Its properties are shown in Table 1. The difference in segregated softening point of the composition is 1.0°C. at 3 # After soaking in aviation kerosene at room temperature for 24 hours, the penetration changes by 26 units before and after oil immersion, and the mass change is less than 1%.

technical field

[0001] The invention relates to an oil-resistant asphalt composition and a preparation method thereof, in particular to a road-use oil-resistant asphalt composition with stable storage and a preparation method thereof. Background technique

[0002] Asphalt material is used as a binder in the mixture of road paving. In order to meet the increasing demand of road construction, asphalt material not only has good viscoelasticity, plasticity and adhesion, but also often needs to meet the requirements of fuel (gasoline, diesel oil) , kerosene) and oil products (lubricating oil, engine oil, etc.) dissolution and erosion capabilities. Especially in airports, waste disposal sites, gas stations, oil tank farms and other places where the road surface is often exposed to spilled fuel and oil, asphalt will be dissolved and leached out of the mixture, making the asphalt pavement soft and bone The cohesion between the materials decreases, the pavement structure becomes loo...

Examples

Embodiment 1

[0022] The bitumen with a needle penetration of 961 / 10mm and a softening point of 43.4°C was selected as the base bitumen, and mixed with 8% phenol refined extract oil (fraction >350°C) based on the total weight of base bitumen and phenol refined extract oil to make a base bitumen mixture. Add 100 parts by weight of the above base asphalt mixture, 4 parts of linear SBS1301 (molecular weight 100000) and 0.13 parts of sulfur sublimation into the base asphalt mixture, mix at 170°C for 5 minutes under high shear force, and then add 2 parts of EVA28150 (VA content 28%, melt index 150) and 1 part ABS resin continued to react for 20 minutes to obtain a stable asphalt composition. Its properties are shown in Table 1. The composition is heat stored at 163° C. for 48 hours, and the difference in segregated softening point is 0.5° C. (tested according to the test method of ASTM D5976-96). at 3 # After soaking in aviation kerosene at room temperature for 24 hours, the penetration change...

Embodiment 2

[0024] The asphalt composition was prepared according to the method of Example 1, except that the amount of ABS resin added was 2 parts. Its properties are shown in Table 1. The difference in segregated softening point of the composition is 0.8°C. # After soaking in aviation kerosene at room temperature for 24 hours, the penetration changes by 23 units before and after oil immersion, and the mass change is less than 1%.

Embodiment 3

[0026] The asphalt composition was prepared according to the method in Example 1, except that the amount of thermoplastic elastic rubber SBS1301 added was 5 parts. Its properties are shown in Table 1. The difference in segregated softening point of the composition is 1.0°C. at 3 # After soaking in aviation kerosene at room temperature for 24 hours, the penetration changes by 26 units before and after oil immersion, and the mass change is less than 1%.