Composite modified rubber asphalt mixture and preparation method thereof

Abstract

The invention discloses a composite modified rubber asphalt mixture. The composite modified rubber asphalt mixture is prepared by the following raw materials by mass: 5-10 parts of waste tyre rubber, 10-15 parts of polyethylene wax, 30-40 parts of petroleum asphalt, 0.02-0.1 part of a thermoplastic resin and 30-45 parts of an aggregate. A preparation method of the composite modified rubber asphalt mixture comprises the steps of preparing improved rubber asphalt by using the waste tyre rubber, the polyethylene wax and the petroleum asphalt according to the above mass proportions under a certain condition; adding the thermoplastic resin to modify the improved rubber asphalt; and finally mixing the modified improved rubber asphalt with the aggregate thoroughly under a certain condition to obtain the composite modified rubber asphalt mixture. The composite modified rubber asphalt mixture is reasonable in proportions, and effectively increases the anti-aging performance, adhesive property and high temperature stability of the improved rubber asphalt. The preparation process is simple in flow, convenient for operations, wide in raw material resources and low in cost, reduces production cost and can be popularized in large scale easily.

Description

technical field

[0001] The invention belongs to the technical field of chemical industry, and in particular relates to a composite modified rubber asphalt mixture and a preparation method thereof. Background technique

[0002] Rubber asphalt refers to the modified asphalt interface material obtained by the swelling reaction of tire rubber powder with a content of more than 15% under the condition of high temperature and sufficient mixing with asphalt. Compared with ordinary asphalt, rubber asphalt has improved high temperature and low temperature stability and anti-aging performance. Rubber asphalt pavement has better driving comfort and can effectively reduce the vibration and noise generated by the interaction between automobile tires and the road surface. It is widely used in road construction in our country. Since rubber asphalt uses recycled tires as the main material for modification, it has a cost advantage over styrene-butadiene block copolymer (SBS) modified asphal...

Examples

Embodiment 1

[0029] (1) Put 5 parts of waste tire rubber and 10 parts of polyethylene wax into the pulverizer according to the mass ratio according to the mass ratio, and then put them into the reaction kettle together with 35 parts of petroleum asphalt, and heat up to 140°C, and stirred for 0.2 h to obtain improved rubber asphalt;

[0030] (2) Add 0.1 part of ethylene-vinyl acetate copolymer to the modified rubber asphalt prepared above according to the ratio of parts by mass, stir for 20 min, and cut for 0.2 h in a colloid mill to prepare modified rubber asphalt;

[0031] (3) Add 45 parts of gravel preheated to 160°C to the prepared modified rubber asphalt according to the ratio of parts by mass and stir evenly to prepare a composite modified rubber asphalt mixture.

[0032] The performance of the product of this embodiment is shown in Table 1.

[0033]

Embodiment 2

[0035] (1) Put 10 parts of waste tire rubber with a particle size of 30 mesh and 15 parts of polyethylene wax into the pulverizer according to the mass ratio to fully pulverize and mix them, and then put them into the reaction kettle together with 35 parts of petroleum asphalt, and heat up Stir for 0.3 h at 150°C to obtain improved rubber asphalt;

[0036] (2) Add 0.02 parts of polyethylene to the modified rubber asphalt prepared above according to the ratio of parts by mass, stir for 25 min, and cut for 0.3 h in a colloid mill to prepare modified rubber asphalt;

[0037] (3) Add 35 parts of sand preheated to 170°C to the prepared modified rubber asphalt according to the ratio of parts by mass and stir evenly to prepare a composite modified rubber asphalt mixture.

[0038] The performance of the product of this embodiment is shown in Table 1.

[0039]

Embodiment 3

[0041] (1) Put 10 parts of waste tire rubber with a particle size of 60 mesh and 15 parts of polyethylene wax into the pulverizer according to the ratio of mass parts to fully pulverize and mix them, then put them into the reaction kettle together with 40 parts of petroleum asphalt, and heat up To 160 ° C, stirring for 0.2 h, the improved rubber asphalt is obtained;

[0042] (2) Add 0.02 parts of polystyrene to the modified rubber asphalt prepared above according to the ratio of parts by mass, stir for 25 min, and shear for 0.4 h in a colloid mill to prepare modified rubber asphalt;

[0043] (3) Add 30 parts of powder preheated to 160°C to the prepared modified rubber asphalt according to the ratio of parts by mass and stir evenly to prepare a composite modified rubber asphalt mixture.

[0044] The performance of the product of this embodiment is shown in Table 1.

[0045]

technical field

[0001] The invention belongs to the technical field of chemical industry, and in particular relates to a composite modified rubber asphalt mixture and a preparation method thereof. Background technique

[0002] Rubber asphalt refers to the modified asphalt interface material obtained by the swelling reaction of tire rubber powder with a content of more than 15% under the condition of high temperature and sufficient mixing with asphalt. Compared with ordinary asphalt, rubber asphalt has improved high temperature and low temperature stability and anti-aging performance. Rubber asphalt pavement has better driving comfort and can effectively reduce the vibration and noise generated by the interaction between automobile tires and the road surface. It is widely used in road construction in our country. Since rubber asphalt uses recycled tires as the main material for modification, it has a cost advantage over styrene-butadiene block copolymer (SBS) modified asphal...

Examples

Embodiment 1

[0029] (1) Put 5 parts of waste tire rubber and 10 parts of polyethylene wax into the pulverizer according to the mass ratio according to the mass ratio, and then put them into the reaction kettle together with 35 parts of petroleum asphalt, and heat up to 140°C, and stirred for 0.2 h to obtain improved rubber asphalt;

[0030] (2) Add 0.1 part of ethylene-vinyl acetate copolymer to the modified rubber asphalt prepared above according to the ratio of parts by mass, stir for 20 min, and cut for 0.2 h in a colloid mill to prepare modified rubber asphalt;

[0031] (3) Add 45 parts of gravel preheated to 160°C to the prepared modified rubber asphalt according to the ratio of parts by mass and stir evenly to prepare a composite modified rubber asphalt mixture.

[0032] The performance of the product of this embodiment is shown in Table 1.

[0033]

Embodiment 2

[0035] (1) Put 10 parts of waste tire rubber with a particle size of 30 mesh and 15 parts of polyethylene wax into the pulverizer according to the mass ratio to fully pulverize and mix them, and then put them into the reaction kettle together with 35 parts of petroleum asphalt, and heat up Stir for 0.3 h at 150°C to obtain improved rubber asphalt;

[0036] (2) Add 0.02 parts of polyethylene to the modified rubber asphalt prepared above according to the ratio of parts by mass, stir for 25 min, and cut for 0.3 h in a colloid mill to prepare modified rubber asphalt;

[0037] (3) Add 35 parts of sand preheated to 170°C to the prepared modified rubber asphalt according to the ratio of parts by mass and stir evenly to prepare a composite modified rubber asphalt mixture.

[0038] The performance of the product of this embodiment is shown in Table 1.

[0039]

Embodiment 3

[0041] (1) Put 10 parts of waste tire rubber with a particle size of 60 mesh and 15 parts of polyethylene wax into the pulverizer according to the ratio of mass parts to fully pulverize and mix them, then put them into the reaction kettle together with 40 parts of petroleum asphalt, and heat up To 160 ° C, stirring for 0.2 h, the improved rubber asphalt is obtained;

[0042] (2) Add 0.02 parts of polystyrene to the modified rubber asphalt prepared above according to the ratio of parts by mass, stir for 25 min, and shear for 0.4 h in a colloid mill to prepare modified rubber asphalt;

[0043] (3) Add 30 parts of powder preheated to 160°C to the prepared modified rubber asphalt according to the ratio of parts by mass and stir evenly to prepare a composite modified rubber asphalt mixture.

[0044] The performance of the product of this embodiment is shown in Table 1.

[0045]

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