CN113604061A - Anti-cracking asphalt and preparation method thereof - Google Patents
Anti-cracking asphalt and preparation method thereof Download PDFInfo
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- CN113604061A CN113604061A CN202110868721.4A CN202110868721A CN113604061A CN 113604061 A CN113604061 A CN 113604061A CN 202110868721 A CN202110868721 A CN 202110868721A CN 113604061 A CN113604061 A CN 113604061A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
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Abstract
The invention provides anti-cracking asphalt which comprises the following components in parts by weight: 70-95 parts of asphalt, 5-10 parts of modified rubber powder, 5-10 parts of foamed plastic, 1-3 parts of skim rubber, 2-5 parts of glass fiber, 1-3 parts of anti-aging agent, 0.5-1 part of antioxidant and 0.5-1 part of plasticizer. The anti-cracking asphalt prepared by the invention has the advantages of low cost, environmental protection and simple preparation.
Description
Technical Field
The invention relates to the field of buildings, in particular to anti-cracking asphalt and a preparation method thereof.
Background
Bitumen is a viscous, black petroleum oil with a highly viscous liquid or semi-solid form, black on its surface, soluble in carbon disulphide, carbon tetrachloride.
The asphalt can be mainly divided into coal tar asphalt, petroleum asphalt and natural asphalt: among them, coal tar pitch is a by-product of coking. Petroleum pitch is the residue of crude oil fractionation. Natural bitumen is stored underground, and some forms a mineral layer or is accumulated on the surface of the crust.
The main use of bitumen, about 70% bitumen, is in road construction, where it is used as a glue or binder mixed with building aggregate particles to produce asphalt concrete. Other major uses of asphalt are for asphalt waterproofing, including linoleum production and flat roof sealing.
In the actual use process of the asphalt pavement, the asphalt pavement can crack, especially the pavement with large vehicles coming and going. Therefore, it is necessary to develop a cracking resistant asphalt material.
Patent CN112645642A discloses a cracking-resistant asphalt concrete and a preparation method thereof. The cracking-resistant asphalt concrete comprises mineral aggregate, asphalt, fibrilia, super absorbent resin and tetrapod-like zinc oxide whiskers, wherein the weight ratio of the mineral aggregate to the asphalt is 1: (4.18% -5.17%), the weight ratio of the mineral aggregate to the fibrilia is 1: (0.45% -0.6%), the weight ratio of the mineral aggregate to the super absorbent resin is 1: (0.28% -0.42%), the weight ratio of the mineral aggregate to the tetrapod-like zinc oxide whisker is 1: (0.24% -0.38%). The cracking performance of asphalt concrete is improved by adding fibrilia and the like, but the cracking performance of asphalt is not improved.
Patent CN112280325A discloses a cracking-proof asphalt and a preparation method thereof. The cracking-resistant asphalt is prepared from the following raw materials in parts by weight: matrix asphalt; a modifier; a filler; an antioxidant. The preparation method comprises the following steps: s1, mixing the matrix asphalt and the antioxidant according to the proportion, stirring for 30-60min, and standing after stirring to obtain a first-grade mixture; s2, adding a modifier into the primary mixture according to the proportion, stirring for 30-40min, and standing after stirring to obtain a secondary mixture; and S3, adding the filler into the secondary mixture according to the proportion, and stirring for 30-60min to obtain the formed anti-cracking asphalt. The modifier is one or two of nitrile rubber and ethylene propylene diene monomer, and the modification cost is high.
Disclosure of Invention
Therefore, the invention aims to provide the anti-cracking asphalt with low cost, environmental protection and simple preparation method.
The cracking-resistant asphalt comprises the following components in parts by weight: 70-95 parts of asphalt, 5-10 parts of modified rubber powder, 5-10 parts of foamed plastic, 1-3 parts of skim rubber, 2-5 parts of glass fiber, 1-3 parts of anti-aging agent, 0.5-1 part of antioxidant and 0.5-1 part of plasticizer.
Preferably, the cracking-resistant asphalt comprises the following components in parts by weight: 85 parts of asphalt, 8 parts of modified rubber powder, 7 parts of foamed plastic, 3 parts of skim rubber, 4 parts of glass fiber, 2 parts of anti-aging agent, 1 part of antioxidant and 0.8 part of plasticizer.
Preferably, the asphalt is a mixture of natural asphalt and petroleum asphalt, and the weight ratio of the natural asphalt to the petroleum asphalt is 1: 2-3.
Preferably, the foamed plastic particles are a mixture of waste foamed polyurethane particles and waste foamed styrene particles, and the diameters of the waste foamed polyurethane particles and the waste foamed styrene particles are 0.1-0.5 cm.
Preferably, in the foamed plastic particles, the weight ratio of the waste foamed polyurethane particles to the waste foamed styrene particles is 1: 5-10.
Preferably, the modified rubber powder is prepared from the following components in parts by weight: 100 parts of waste tires, 0.1-0.5 part of lubricating oil and 2-4 parts of plasticizer.
The modified rubber powder is prepared by the following preparation method:
step 1: cleaning and drying waste tires, crushing the waste tires into particles of 200-30 meshes, adding lubricating oil and a plasticizer, and uniformly mixing;
step 2: adding the mixture obtained in the step 1 into a rubber internal mixer for mixing, and extruding and granulating the obtained mixture through a double-screw extruder to obtain rubber particles;
and step 3: and (3) allowing the rubber particles obtained in the step (2) to act for 5-10min under microwave irradiation to obtain modified rubber powder.
Preferably, in the step 1, the lubricating oil is one or two of aromatic oil and methyl hydroxybenzoate; in the step 2, the mixing temperature is 140-160 ℃, and the mixing time is 10-15 min; in the step 3, the microwave frequency is 1200 MHz.
The preparation method of the cracking-resistant asphalt comprises the following preparation steps:
step 1: taking 1/2-2/3 asphalt, adding modified rubber powder and skim rubber, fully mixing, heating and stirring for a period of time, and cooling;
step 2: adding the foaming plastic and the glass fiber into the residual asphalt, and stirring and mixing;
and step 3: uniformly mixing the mixture obtained in the step 1 and the step 2, adding the anti-aging agent, the antioxidant and the plasticizer, heating and stirring
Preferably, in the step 1, the heating temperature is 140-; in the step 2, the stirring temperature is 30-50 ℃, the stirring speed is 100-150rpm/min, and the stirring time is 1-2 h; in the step 3, the stirring temperature is 20-30 ℃, the stirring speed is 50-150rpm/min, and the stirring time is 30 min.
Compared with the prior art, the invention has the beneficial effects that:
1) the waste foamed plastic material is utilized, the cost is low, and the environment can be improved;
2) the application adopts the skim rubber, utilizes the by-product of natural rubber production, and can reduce the cost;
3) the components are reasonable in proportion, the manufacturing is simple, and the obtained product is good in cracking resistance.
Detailed Description
For clear and complete description of the technical solutions in the present invention, it is obvious that the inventor combines the embodiments to describe, but the following embodiments describe only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The cracking-resistant asphalt comprises the following components in parts by weight: 70-95 parts of asphalt, 5-10 parts of modified rubber powder, 5-10 parts of foamed plastic, 1-3 parts of skim rubber, 2-5 parts of glass fiber, 1-3 parts of anti-aging agent, 0.5-1 part of antioxidant and 0.5-1 part of plasticizer.
Further, the asphalt is a mixture of natural asphalt and petroleum asphalt, and the weight ratio of the natural asphalt to the petroleum asphalt is 1: 2-3.
Furthermore, the foamed plastic particles are a mixture of waste foamed polyurethane particles and waste foamed styrene particles, and the diameters of the waste foamed polyurethane particles and the waste foamed styrene particles are 0.1-0.5 cm.
Furthermore, in the foamed plastic particles, the weight ratio of the waste foamed polyurethane particles to the waste foamed styrene particles is 1: 5-10.
Further, the modified rubber powder is prepared from the following components in parts by weight: 100 parts of waste tires, 0.1-0.5 part of lubricating oil and 2-4 parts of plasticizer.
Further, the modified rubber powder is prepared by the following preparation method:
step 1: cleaning and drying waste tires, crushing the waste tires into particles of 200-30 meshes, adding lubricating oil and a plasticizer, and uniformly mixing;
step 2: and (3) acting the mixture obtained in the step (1) for 5-10min under microwave irradiation, wherein the microwave frequency is 1200 MHz.
The preparation method of the anti-cracking asphalt comprises the following preparation steps:
step 1: taking 1/2-2/3 asphalt, adding modified rubber powder and skim rubber, fully mixing, heating and stirring for a period of time, and cooling;
step 2: adding the foaming plastic and the glass fiber into the residual asphalt, and stirring and mixing;
and step 3: uniformly mixing the mixture obtained in the step 1 and the step 2, adding the anti-aging agent, the antioxidant and the plasticizer, heating and stirring
Further, in the step 1, the heating temperature is 140-.
In the following examples, the anti-aging agent is a phenolic anti-aging agent, the antioxidant is 1024 or 1076, and the plasticizer is coal tar, dioctyl phthalate or diethyl phthalate.
Preparing modified rubber powder:
sample 1 preparation method:
step 1: cleaning and drying 100 parts of waste tires, crushing the waste tires into particles of 200-30 meshes, adding 0.4 part of aromatic oil and 3 parts of plasticizer, and uniformly mixing;
step 2: adding the mixture obtained in the step 1 into a rubber internal mixer for mixing at the mixing temperature of 150 ℃ for 15min, and extruding and granulating the obtained mixture by a double-screw extruder to obtain rubber particles;
and step 3: and (3) allowing the rubber particles obtained in the step (2) to act for 10min under microwave irradiation of 1200MHz to obtain modified rubber powder.
Sample 2 preparation method:
step 1: cleaning and drying 100 parts of waste tires, crushing the waste tires into particles of 200-30 meshes, adding 0.5 part of methyl hydroxybenzoate and 3 parts of plasticizer, and uniformly mixing;
step 2: adding the mixture obtained in the step 1 into a rubber internal mixer for mixing at 160 ℃ for 10min, and carrying out extrusion granulation on the obtained mixture by a double-screw extruder to obtain rubber particles;
and step 3: and (3) allowing the rubber particles obtained in the step (2) to act for 10min under microwave irradiation of 1200MHz to obtain modified rubber powder.
Sample 3 preparation method:
step 1: cleaning and drying 100 parts of waste tires, crushing the waste tires into particles of 200-30 meshes, adding 5 parts of plasticizer, and uniformly mixing;
step 2: adding the mixture obtained in the step 1 into a rubber internal mixer for mixing at the mixing temperature of 140 ℃ for 15min, and extruding and granulating the obtained mixture by a double-screw extruder to obtain rubber particles;
and step 3: and (3) allowing the rubber particles obtained in the step (2) to act for 10min under microwave irradiation of 1200MHz to obtain modified rubber powder.
Preparing modified asphalt:
a cracking resistant asphalt was prepared according to the formulation given in Table 1, and the following preparation method
Step 1: taking 60 wt% of asphalt, adding the modified rubber powder and the skim rubber, fully mixing, heating and stirring for a period of time, and cooling; wherein the heating temperature is 140-;
step 2: adding the foaming plastic and the glass fiber into the residual asphalt, and stirring and mixing; wherein the stirring temperature is 30-50 ℃, the stirring speed is 100-150rpm/min, and the stirring time is 1-2 h.
And step 3: and (3) uniformly mixing the mixture obtained in the step (1) and the step (2), adding an anti-aging agent, an antioxidant and a plasticizer, and heating and stirring to obtain the anti-aging agent.
Table 1:
| asphalt | Modified rubber powder | Foamed plastic | Rubber cleaning rubber | Glass fiber | Anti-aging agent | Antioxidant agent | Plasticizer | |
| Unit of | Portions are | Portions are | Portions are | Portions are | Portions are | Portions are | Portions are | Portions are |
| Example 1 | 70 | 5 | 6 | 2 | 4 | 1 | 0.8 | 0.6 |
| Example 2 | 80 | 10 | 5 | 1 | 2 | 3 | 0.5 | 0.7 |
| Example 3 | 85 | 8 | 7 | 3 | 4 | 2 | 1 | 0.8 |
| Example 4 | 90 | 7 | 8 | 3 | 5 | 3 | 0.7 | 0.8 |
| Example 5 | 95 | 8 | 10 | 2 | 4 | 2 | 1 | 1 |
| Comparative example 1 | 85 | 4 | 6 | 2 | 6 | 2 | 0.8 | 0.8 |
| Comparative example 2 | 80 | 3 | 3 | 2 | 1 | 1 | 1 | 1 |
| Comparative example 3 | 85 | 5 | 15 | 1 | 2 | 0.5 | 0.4 | 0.4 |
Comparative example 4:
the formulation is the same as in example 3, and the preparation method is as follows:
adding modified rubber powder, skim rubber, foamed plastic, glass fiber, anti-aging agent, antioxidant and plasticizer into the asphalt; stirring is carried out at 100 ℃, the stirring speed is 100-150rpm/min, and the stirring time is 4 h.
Comparative example 5:
the other proportions and procedures were the same as in example 3, except that modified rubber powder was not added.
Comparative example 6:
no skim rubber was added, and the other compounding ratios and procedures were the same as in example 3.
Comparative example 7:
the glass fiber and the foamed plastic rubber powder are not added, and other proportions and steps are the same as those of the example 3.
Comparative example 8:
the other formulation and procedure were the same as in example 3, except that no foamed plastic was added.
Comparative example 9:
the modified rubber powder is replaced by waste tires with the same mass and particle size, and other proportions and steps are the same as those in example 3. The performance test was performed on the cracking-resistant asphalt in each example and each comparative example, and the test procedure was as follows:
(1) ductility of the modified asphalt at low temperature (5 ℃ C.) was measured according to T0605.
(2) The softening point of the modified asphalt was determined according to T0606.
(3) The penetration of the modified asphalt was measured according to T0604.
(4) Modified asphalt brookfield viscosity was determined according to T0625.
Specific results are shown in table 2.
| Degree of extension | Softening point | Penetration degree | Brookfield rotational viscosity | |
| Unit of | 5cm/min，cm(5℃) | ℃ | ℃/0.1mm，100g，5s | 180℃ |
| Example 1 | 26.3 | 70.4 | 87 | 3.1 |
| Example 2 | 29.9 | 62.9 | 113 | 3 |
| Example 3 | 34.5 | 77.9 | 120 | 3.2 |
| Example 4 | 31.7 | 74.3 | 98 | 2.9 |
| Example 5 | 30.6 | 59.7 | 104 | 3.1 |
| Comparative example 1 | 22.4 | 63.1 | 91 | 2.8 |
| Comparative example 2 | 28.2 | 67.5 | 85 | 2.9 |
| Comparative example 3 | 26.3 | 59.7 | 76 | 2.9 |
| Comparative example 4 | 25.1 | 61.3 | 93 | 3 |
| Comparative example 5 | 18.4 | 55.6 | 69 | 2.7 |
| Comparative example 6 | 18.2 | 49.2 | 96 | 3.4 |
| Comparative example 7 | 21.5 | 53.8 | 82 | 2.8 |
| Comparative example 8 | 16.9 | 46.9 | 67 | 3.4 |
| Comparative example 9 | 20.9 | 57.6 | 79 | 2.6 |
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The cracking-resistant asphalt is characterized by comprising the following components in parts by weight: 70-95 parts of asphalt, 5-10 parts of modified rubber powder, 5-10 parts of foamed plastic, 1-3 parts of skim rubber, 2-5 parts of glass fiber, 1-3 parts of anti-aging agent, 0.5-1 part of antioxidant and 0.5-1 part of plasticizer.
2. The cracking-resistant asphalt of claim 1, which is characterized by comprising the following components in parts by weight: 85 parts of asphalt, 8 parts of modified rubber powder, 7 parts of foamed plastic, 3 parts of skim rubber, 4 parts of glass fiber, 2 parts of anti-aging agent, 1 part of antioxidant and 0.8 part of plasticizer.
3. The cracking-resistant asphalt according to claim 1, wherein the asphalt is a mixture of natural asphalt and petroleum asphalt, and the weight ratio of the natural asphalt to the petroleum asphalt is 1: 2-3.
4. The cracking-resistant asphalt of claim 1, wherein the foamed plastic particles are a mixture of waste foamed polyurethane particles and waste foamed styrene particles, and the diameters of the waste foamed polyurethane particles and the waste foamed styrene particles are 0.1-0.5 cm.
5. The cracking-resistant asphalt of claims 1 and 4, wherein the weight ratio of the waste foamed polyurethane particles to the waste foamed styrene particles in the foamed plastic particles is 1: 5-10.
6. The cracking-resistant asphalt according to claim 1, wherein the modified rubber powder is prepared from the following components in parts by weight: 100 parts of waste tires, 0.1-0.5 part of lubricating oil and 2-4 parts of plasticizer.
7. The cracking-resistant asphalt according to claim 1, wherein the modified rubber powder is prepared by the following preparation method:
step 1: cleaning and drying waste tires, crushing the waste tires into particles of 200-30 meshes, adding lubricating oil and a plasticizer, and uniformly mixing;
step 2: adding the mixture obtained in the step 1 into a rubber internal mixer for mixing, and extruding and granulating the obtained mixture through a double-screw extruder to obtain rubber particles;
and step 3: and (3) allowing the rubber particles obtained in the step (2) to act for 5-10min under microwave irradiation to obtain modified rubber powder.
8. The method for preparing modified rubber powder according to claim 7, wherein in the step 1, the lubricating oil is one or two of aromatic oil and methyl hydroxybenzoate; in the step 2, the mixing temperature is 140-160 ℃, and the mixing time is 10-15 min; in the step 3, the microwave frequency is 1200 MHz.
9. The method for preparing the cracking-resistant asphalt according to claim 1, which is characterized by comprising the following preparation steps:
step 1: taking 1/2-2/3 asphalt, adding modified rubber powder and skim rubber, fully mixing, heating and stirring for a period of time, and cooling;
step 2: adding the foaming plastic and the glass fiber into the residual asphalt, and stirring and mixing;
and step 3: and (3) uniformly mixing the mixture obtained in the step (1) and the step (2), adding the anti-aging agent, the antioxidant and the plasticizer, and heating and stirring.
10. The method for preparing anti-cracking asphalt as claimed in claim 9, wherein in the step 1, the heating temperature is 140-; in the step 2, the stirring temperature is 30-50 ℃, the stirring speed is 100-150rpm/min, and the stirring time is 1-2 h; in the step 3, the stirring temperature is 20-30 ℃, the stirring speed is 50-150rpm/min, and the stirring time is 30 min.
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