Polymer modified asphalt and preparation method thereof

Abstract

The invention discloses polymer modified asphalt. The polymer modified asphalt comprises the following components in parts by weight: 50 to 100 parts of asphalt, 10 to 20 parts of polymer modifier, 2 to 7 parts of rubber powder, 1 to 8 parts of nano titanium oxide, 2 to 10 parts of polyacrylate, 2 to 5 parts of surfactant, 1 to 8 parts of heat stabilizer and 2 to 8 parts of anti-aging agent. The invention also discloses a preparation method of the polymer modified asphalt. The polymer modified asphalt is good in low temperature resistance, high temperature resistance, rigidness, flexibility and stability, simple in preparation method and low in cost; no toxic substance is released in the preparation process, and the environmental protection can be facilitated.

Description

Technical field: [0001] The invention relates to the technical field of asphalt modification, in particular to a polymer modified asphalt. Background technique: [0002] With the development of highways in our country, asphalt pavement has become the preferred pavement type in the construction of high-grade highways, but a problem that cannot be ignored is that the early damage of asphalt pavement is becoming more and more serious. On the other hand, due to the sensitivity of asphalt to temperature, the strength and rigidity of asphalt are reduced at high temperatures, and the road surface is easy to soften, resulting in rutting, wrapping, and oil flooding; and at low temperatures due to crack resistance Poor, the pavement is prone to fatigue cracking, shrinkage cracking, and reflection cracking, which leads to rapid deterioration of the inside and affects the durability of the asphalt pavement. [0003] Chinese patent (CN1990578A) discloses a composite modified asphalt tha...

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Problems solved by technology

[0002] With the development of highways in our country, asphalt pavement has become the preferred pavement type in the construction of high-grade highways, but a problem that cannot be ignored is that the early damage of asphalt pavement is becoming more and more serious. On the other hand, due to the sensitivity of asphalt to temperature, the strength and rigidity of asphalt are reduced at high temperatures, and the road surface is easy to soften, resulting in rutting, wrapping, and oil flooding; and at low temperatures due to crack resistance Poor, the pavement is prone to fatigue cracking, shrinkage cracking, and reflection cracking, which leads to rapid deterioration inside and affects the durability of the asphalt pavement

[0003] Chinese patent (CN1990578A) discloses a composite modified asphalt that is beneficial to construction, including asphalt, SBS, polyethylene wax, polypropylene wax, petroleum resin and sulfur. Although the composite modified asphalt has certain high temperature resistance, the sulfur Adding will produce toxic gas in the production process, which is harmful to the environment; Chinese patent (CN102304288A) discloses a SBS modified asphalt waterproofing membrane filled with vitrified microbeads, which improves the performance of SBS modified asphalt through vitrified microbeads. High temperature resistance, low temperature flexibility, but vitrified microbeads have high water absorption and poor thermal conductivity

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