High-strength low-viscosity modified asphalt and processing process

Abstract

The invention discloses high-strength low-viscosity modified asphalt and a processing process, relates to the technical field of engineering construction, and in particular relates to a road asphalt material which can be extensively applied to roads and bridges. The high-strength low-viscosity modified asphalt is realized by the technical scheme that the high-strength low-viscosity modified asphalt comprises the following components in percentage by weight: 0.1-5% of aromatic oil, 2%-5% of styrene-butadiene copolymer, 0.1%-4% of polyethylene-polypropylene copolymer, 0.1-0.25% of stabilizer and the balance of No. 70 and No. 90 asphalt. As the polyethylene-polypropylene copolymer is added, and the side chain long bond structure of the polyethylene-polypropylene copolymer is utilized to reprocess the modified asphalt product, and high PG (Performance Grade) requirements are easily reached. Besides, the high-strength low-viscosity modified asphalt has an excellent high-low temperature grade, is energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of engineering construction, in particular to a road asphalt material that can be widely used in roads and bridges. Background technique [0002] Since the existence of human civilization, the road has been extending infinitely under people's feet. From the rough trails stepped on by people to the sidewalks paved with cobblestones, from the concrete poured on the cement pavement to the asphalt pavement widely used today, it proves the development history of human civilization from one side. [0003] We know that the asphalt pavement that is widely used today has the advantages of good wear resistance, no dust, and good braking performance of motor vehicles. However, it also has the disadvantages of low melting point and poor low temperature performance. That is to say, in the hot summer, under the scorching of high temperature, the black road surface absorbs heat and softens. Under the rolling of motor veh...

AI Technical Summary

Problems solved by technology

If only the content of styrene-butadiene copolymer (SBS) is increased, it is relatively difficult to increase the PG grade (American road construction standard) to a certain extent, and it is difficult to construct

And it is reflected in: ①The modified product has high viscosity at high temperature, which brings troubles to the site construction; ②The product has poor storage stability, styrene-butadiene copolymer (SBS) is easy to segregate, and the index difference after storage is large; ③The index only meets PG76-10 requirements (76 is plus 76°C, -10 is minus 10°C), and low temperature performance is not good, no ductility; ④ mixing temperature is high (180°C ~ 190°C), and it is difficult to mix evenly, the output Low; ⑤The energy consumption in the construction process is large, the damage rate of construction equipment is high, the construction requirements are high, and the road surface is difficult to compact