Modified asphalt and preparation process thereof

Abstract

The invention relates to the field of asphalt, and discloses modified asphalt, and the formula of the modified asphalt comprises 65-75% of matrix asphalt, 5-10% of paraffin oil, 3-5% of plant regenerated oil, 1-3% of a flexibilizer, 0.5-1% of an anti-stripping agent, and 2-5% of water-soluble polyimide. Rainwater on the asphalt surface is decomposed, so that part of the asphalt base material has a certain possibility of falling off, the asphalt surface can still keep certain pits after being used for a long time, and the anti-skid performance of the asphalt surface is improved.

Description

Technical Field

[0001] The present invention relates to the field of asphalt preparation, and more specifically, to a modified asphalt and a preparation process thereof. Background Art

[0002] Asphalt is a dark brown complex mixture of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a kind of high-viscosity organic liquid, mostly in the form of liquid or semi-solid petroleum. The surface is black and soluble in carbon disulfide and carbon tetrachloride. Asphalt is an organic gelling material that is waterproof, moisture-proof and anti-corrosive. Asphalt can be mainly divided into three types: coal tar asphalt, petroleum asphalt and natural asphalt: among them, coal tar asphalt is a by-product of coking. Petroleum asphalt is the residue after crude oil distillation. Natural asphalt is stored underground, some of which form mineral layers or accumulate on the surface of the earth's crust. Asphalt is mainly used in industries such as coatings, plastics, rubber, and paving roads.

[0003] Asphalt pavement increases friction with car tires by making its surface uneven and non-smooth. This causes the concave parts to be filled up after it rains, or the pavement becomes smoother than when it was new due to long-term friction, which reduces the friction of the pavement and increases the risk of vehicle skidding. This problem was first raised by Dr. Huang Xiaoming in "Roadbed and Pavement Engineering". For this reason, we have proposed two different anti-skid solutions. One of them is to make the polymer material fall off from the roadbed surface through friction with the road surface. The present invention proposes another solution, which can achieve self-changing surface potholes without relying on external forces. Summary of the invention

[0004] The purpose of the present invention is to provide a modified asphalt and a preparation process thereof in view of the deficiencies in the prior art, so as to solve the problem that the friction of the current asphalt pavement decreases during use, that is, the problem of anti-skid of the asphalt pavement.

[0005] The above technical purpose of the present invention is achieved through the following technical scheme: a modified asphalt, the asphalt formula is as follows: including 65% to 75% of base asphalt, 5% to 10% of paraffin oil, 3% to 5% of plant recycled oil, 1% to 3% of toughening agent, 0.5% to 1% of anti-stripping agent, and 2% to 5% of water-soluble polyimide.

[0006] Furthermore: it includes 65% base asphalt, 5% paraffin oil, 3% plant recycled oil, 1% toughening agent, 0.5% anti-stripping agent, and 2% water-soluble polyimide.

[0007] Furthermore, it includes 70% base asphalt, 8% paraffin oil, 4% plant recycled oil, 2% toughening agent, 0.8% anti-stripping agent, and 3% water-soluble polyimide.

[0008] Furthermore, it includes 70% base asphalt, 8% paraffin oil, 4% plant recycled oil, 2% toughening agent, 0.8% anti-stripping agent, and 3% water-soluble polyimide.

[0009] Furthermore: it includes 75% base asphalt, 10% paraffin oil, 5% plant recycled oil, 3% toughening agent, 1% anti-stripping agent, and 5% water-soluble polyimide.

[0010] A process for preparing modified asphalt, comprising the modified asphalt, wherein the preparation steps are as follows:

[0011] Step S1, firstly, adding raw materials including base asphalt, paraffin oil, plant regeneration oil, toughening agent and anti-stripping agent into a heated stirring kettle according to a proportion;

[0012] Step S2, maintaining the heating temperature at 150°, heating and stirring for 120 min, adding water-soluble polyimide, maintaining the temperature at 120°, and heating and stirring;

[0013] Step S3, heating and stirring until ready for use;

[0014] What needs special attention is that the thickness of asphalt paving should not be less than 15cm.

[0015] According to the above scheme,

[0016] Compared with the prior art, the beneficial effects are as follows:

[0017] The present invention adds water-soluble polyimide, which, after being mixed with traditional asphalt, causes rainwater on the asphalt surface to decompose, so that part of the asphalt base material may fall off to a certain extent, so that the asphalt surface can still maintain certain potholes after long-term use, thereby increasing the anti-skid performance of the asphalt surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The invention is further described in detail below in conjunction with specific embodiments. The following embodiments are merely illustrative and not limiting of the protection scope of the present invention.

[0019] Example 1

[0020] A modified asphalt has the following formula, comprising 65% base asphalt, 5% paraffin oil, 3% plant regeneration oil, 1% toughening agent, 0.5% anti-stripping agent and 2% water-soluble polyimide.

[0021] Through actual experiments, it is found that for every 100 times of rain scouring (rain scouring experiment, using weak acidic and weak alkaline rainwater 50 times each), the asphalt thickness is reduced to 0.5cm. Compared with the traditional asphalt pothole coefficient of 1, the pothole coefficient is 0.998~1.002.

[0022] Example 2

[0023] A modified asphalt has the following formula, including 70% base asphalt, 8% paraffin oil, 4% plant regeneration oil, 2% toughening agent, 0.8% anti-stripping agent and 3% water-soluble polyimide.

[0024] Through actual experiments, it is found that for every 100 times of rain scouring (rain scouring experiment, using weak acidic and weak alkaline rainwater 50 times each), the asphalt thickness is reduced to 0.5cm. Compared with the traditional asphalt pothole coefficient of 1, the pothole coefficient is 0.998~1.002.

[0025] Example 3

[0026] A modified asphalt has the following formula, including 70% base asphalt, 8% paraffin oil, 4% plant regeneration oil, 2% toughening agent, 0.8% anti-stripping agent and 3% water-soluble polyimide.

[0027] Through actual experiments, it can be found that for every 100 times of rain scouring (rain scouring experiment, using weak acidic and weak alkaline rainwater 50 times each), the asphalt thickness is reduced to 0.55cm. Compared with the traditional asphalt pothole coefficient of 1, the pothole coefficient is 0.997~1.003

[0028] Example 4

[0029] A modified asphalt has the following formula, comprising 75% base asphalt, 10% paraffin oil, 5% plant regeneration oil, 3% toughening agent, 1% anti-stripping agent and 5% water-soluble polyimide.

[0030] Through actual experiments, it is found that for every 100 times of rain scouring (rain scouring experiment, using weak acidic and weak alkaline rainwater 50 times each), the asphalt thickness is reduced to 0.55cm. Compared with the traditional asphalt pothole coefficient of 1, the pothole coefficient is 0.997~1.003.

[0031] A process for preparing modified asphalt, comprising the modified asphalt, the preparation steps are as follows: Step S1, firstly, adding raw materials including base asphalt, paraffin oil, plant regeneration oil, toughening agent and anti-stripping agent into a heated stirring kettle according to a proportion;

[0032] Step S2, maintaining the heating temperature at 150°, heating and stirring for 120 min, adding water-soluble polyimide, maintaining the temperature at 120°, and heating and stirring;

[0033] Step S3, heating and stirring until ready for use;

[0034] What needs special attention is that the thickness of asphalt paving should not be less than 15cm.

[0035] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A modified asphalt, characterized in that: The asphalt formula is as follows: it includes 65% to 75% of base asphalt, 5% to 10% of paraffin oil, 3% to 5% of plant regeneration oil, 1% to 3% of toughening agent, 0.5% to 1% of anti-stripping agent, and 2% to 5% of water-soluble polyimide.

2. A modified asphalt according to claim 1, characterized in that; It includes 65% base asphalt, 5% paraffin oil, 3% plant recycled oil, 1% toughening agent, 0.5% anti-stripping agent and 2% water-soluble polyimide.

3. A modified asphalt according to claim 1, characterized in that: It includes 70% base asphalt, 8% paraffin oil, 4% plant recycled oil, 2% toughening agent, 0.8% anti-stripping agent and 3% water-soluble polyimide.

4. A modified asphalt according to claim 1, characterized in that: It includes 70% base asphalt, 8% paraffin oil, 4% plant recycled oil, 2% toughening agent, 0.8% anti-stripping agent and 3% water-soluble polyimide.

5. The modified asphalt according to claim 1, characterized in that: It includes 75% base asphalt, 10% paraffin oil, 5% plant recycled oil, 3% toughening agent, 1% anti-stripping agent and 5% water-soluble polyimide.

6. A process for preparing modified asphalt, characterized in that: A modified asphalt comprising any one of claims 1 to 5, wherein the preparation steps are as follows: Step S1, firstly, adding raw materials including base asphalt, paraffin oil, plant regeneration oil, toughening agent and anti-stripping agent into a heated stirring kettle according to a proportion; Step S2, maintaining the heating temperature at 150°, heating and stirring for 120 min, adding water-soluble polyimide, maintaining the temperature at 120°, and heating and stirring; Step S3, heating and stirring until ready for use; What needs special attention is that the thickness of asphalt paving should not be less than 15cm.