A kind of recycled asphalt concrete and its preparation method

Abstract

The invention relates to a recycled asphalt concrete and a preparation method thereof. The recycled asphalt concrete comprises the following components in parts by weight: 40-70 parts of new asphalt, 30-50 parts of waste and old asphalt mixture, 10-20 parts of coarse Aggregate, 8-12 parts of fine aggregate, 2-5 parts of regeneration agent, 1-3 parts of antioxidant and 1-2 parts of SBS modifier. The invention solves the problem that the aging resistance and durability of the existing asphalt concrete pavement are poor, which further leads to the phenomenon that the asphalt concrete pavement is full of potholes after a short period of use, which affects the continued use of the later stage. The recycled asphalt concrete prepared by the invention has excellent performance, can be closely bonded to the old asphalt concrete when splicing, meets the use requirements of high-grade road surfaces, and can provide important references for the development of asphalt concrete in my country.

Description

technical field

[0001] The invention relates to the field of recycled asphalt concrete, in particular to a recycled asphalt concrete and a preparation method thereof. Background technique

[0002] Asphalt concrete is obtained by mixing and compacting mineral mixture and asphalt binder. It is one of the main materials of modern road pavement structure. It is widely used in various road pavements, especially suitable for high-speed road pavement. Asphalt concrete pavement has good mechanical properties and road performance, smooth pavement without joints, low vibration and low noise, comfortable driving, high traffic safety, etc., and asphalt pavement can realize the regeneration of pavement materials, so it is widely used in highway construction Designers and builders of all ages.

[0003] Asphalt concrete has the advantage of reducing pavement cracking, but in the process of road paving, it is necessary to combine new asphalt concrete with old asphalt concrete. Due to the p...

Examples

Embodiment 1

[0033] A recycled asphalt concrete, calculated in parts by weight, comprising the following components:

[0034] 60 parts of new asphalt, 40 parts of waste asphalt mixture, 15 parts of coarse aggregate, 10 parts of fine aggregate, 3 parts of regeneration agent, 2 parts of antioxidant and 1.5 parts of SBS modifier.

[0035] The coarse aggregate is steel slag powder with a particle size ranging from 3 to 10 mm; in the steel slag powder, the mass fraction of CaO is 50 to 70%, Al 2 o 3 The mass fraction is 4-8%.

[0036] The fine aggregate is natural sand with a particle size ranging from 0.5 to 3 mm; wherein, the natural sand includes sea sand and lake sand.

[0037] The antioxidant is antioxidant 1010.

[0038] The regeneration agent is calculated in parts by weight and consists of the following components: 12 parts of palm oil, 3 parts of cyclohexanedione, 6 parts of modified halloysite, 4 parts of coumarone resin and 4 parts of polyester resin.

[0039] The preparation pro...

Embodiment 2

[0054] A recycled asphalt concrete, calculated in parts by weight, comprising the following components:

[0055] 40 parts of new asphalt, 30 parts of waste asphalt mixture, 10 parts of coarse aggregate, 8 parts of fine aggregate, 2 parts of regeneration agent, 1 part of antioxidant and 1 part of SBS modifier.

[0056] The coarse aggregate is steel slag powder with a particle size ranging from 3 to 10 mm; in the steel slag powder, the mass fraction of CaO is 50 to 70%, Al 2 o 3 The mass fraction is 4-8%.

[0057] The fine aggregate is natural sand with a particle size ranging from 0.5 to 3 mm; wherein, the natural sand includes river sand and mountain sand.

[0058] The antioxidant is antioxidant 168.

[0059] The regeneration agent is calculated in parts by weight and consists of the following components: 10 parts of palm oil, 1 part of cyclohexanedione, 5 parts of modified halloysite, 3 parts of coumarone resin and 3 parts of polyester resin.

[0060] The preparation proc...

Embodiment 3

[0075] A recycled asphalt concrete, calculated in parts by weight, comprising the following components:

[0076] 70 parts of new asphalt, 50 parts of waste asphalt mixture, 20 parts of coarse aggregate, 12 parts of fine aggregate, 5 parts of regeneration agent, 3 parts of antioxidant and 2 parts of SBS modifier.

[0077] The coarse aggregate is steel slag powder with a particle size ranging from 3 to 10 mm; in the steel slag powder, the mass fraction of CaO is 50 to 70%, Al 2 o 3 The mass fraction is 4-8%.

[0078] The fine aggregate is natural sand with a particle size ranging from 0.5 to 3mm; wherein, the natural sand includes sea sand, lake sand, river sand and mountain sand.

[0079] The antioxidants are antioxidant 1010 and antioxidant 168.

[0080] The regeneration agent is calculated in parts by weight and consists of the following components: 15 parts of palm oil, 5 parts of cyclohexanedione, 8 parts of modified halloysite, 6 parts of coumarone resin and 5 parts of ...

technical field

[0001] The invention relates to the field of recycled asphalt concrete, in particular to a recycled asphalt concrete and a preparation method thereof. Background technique

[0002] Asphalt concrete is obtained by mixing and compacting mineral mixture and asphalt binder. It is one of the main materials of modern road pavement structure. It is widely used in various road pavements, especially suitable for high-speed road pavement. Asphalt concrete pavement has good mechanical properties and road performance, smooth pavement without joints, low vibration and low noise, comfortable driving, high traffic safety, etc., and asphalt pavement can realize the regeneration of pavement materials, so it is widely used in highway construction Designers and builders of all ages.

[0003] Asphalt concrete has the advantage of reducing pavement cracking, but in the process of road paving, it is necessary to combine new asphalt concrete with old asphalt concrete. Due to the p...

Examples

Embodiment 1

[0033] A recycled asphalt concrete, calculated in parts by weight, comprising the following components:

[0034] 60 parts of new asphalt, 40 parts of waste asphalt mixture, 15 parts of coarse aggregate, 10 parts of fine aggregate, 3 parts of regeneration agent, 2 parts of antioxidant and 1.5 parts of SBS modifier.

[0035] The coarse aggregate is steel slag powder with a particle size ranging from 3 to 10 mm; in the steel slag powder, the mass fraction of CaO is 50 to 70%, Al 2 o 3 The mass fraction is 4-8%.

[0036] The fine aggregate is natural sand with a particle size ranging from 0.5 to 3 mm; wherein, the natural sand includes sea sand and lake sand.

[0037] The antioxidant is antioxidant 1010.

[0038] The regeneration agent is calculated in parts by weight and consists of the following components: 12 parts of palm oil, 3 parts of cyclohexanedione, 6 parts of modified halloysite, 4 parts of coumarone resin and 4 parts of polyester resin.

[0039] The preparation pro...

Embodiment 2

[0054] A recycled asphalt concrete, calculated in parts by weight, comprising the following components:

[0055] 40 parts of new asphalt, 30 parts of waste asphalt mixture, 10 parts of coarse aggregate, 8 parts of fine aggregate, 2 parts of regeneration agent, 1 part of antioxidant and 1 part of SBS modifier.

[0056] The coarse aggregate is steel slag powder with a particle size ranging from 3 to 10 mm; in the steel slag powder, the mass fraction of CaO is 50 to 70%, Al 2 o 3 The mass fraction is 4-8%.

[0057] The fine aggregate is natural sand with a particle size ranging from 0.5 to 3 mm; wherein, the natural sand includes river sand and mountain sand.

[0058] The antioxidant is antioxidant 168.

[0059] The regeneration agent is calculated in parts by weight and consists of the following components: 10 parts of palm oil, 1 part of cyclohexanedione, 5 parts of modified halloysite, 3 parts of coumarone resin and 3 parts of polyester resin.

[0060] The preparation proc...

Embodiment 3

[0075] A recycled asphalt concrete, calculated in parts by weight, comprising the following components:

[0076] 70 parts of new asphalt, 50 parts of waste asphalt mixture, 20 parts of coarse aggregate, 12 parts of fine aggregate, 5 parts of regeneration agent, 3 parts of antioxidant and 2 parts of SBS modifier.

[0077] The coarse aggregate is steel slag powder with a particle size ranging from 3 to 10 mm; in the steel slag powder, the mass fraction of CaO is 50 to 70%, Al 2 o 3 The mass fraction is 4-8%.

[0078] The fine aggregate is natural sand with a particle size ranging from 0.5 to 3mm; wherein, the natural sand includes sea sand, lake sand, river sand and mountain sand.

[0079] The antioxidants are antioxidant 1010 and antioxidant 168.

[0080] The regeneration agent is calculated in parts by weight and consists of the following components: 15 parts of palm oil, 5 parts of cyclohexanedione, 8 parts of modified halloysite, 6 parts of coumarone resin and 5 parts of ...