CN113604061B - Cracking-resistant asphalt and preparation method thereof - Google Patents
Cracking-resistant asphalt and preparation method thereof Download PDFInfo
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- CN113604061B CN113604061B CN202110868721.4A CN202110868721A CN113604061B CN 113604061 B CN113604061 B CN 113604061B CN 202110868721 A CN202110868721 A CN 202110868721A CN 113604061 B CN113604061 B CN 113604061B
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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 cracking-resistant 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 method 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 cracking-resistant asphalt and a preparation method thereof.
Background
Asphalt is a viscous, black, and highly viscous, liquid or semisolid form of petroleum, black on the surface, soluble in carbon disulfide, carbon tetrachloride.
Asphalt can be mainly divided into coal tar asphalt, petroleum asphalt and natural asphalt: among them, coal tar pitch is a byproduct of coking. Petroleum asphalt is the residue of crude oil after fractionation. Natural asphalt is stored underground, and some are formed into mineral deposits or accumulated on the surface of the crust.
The primary use of asphalt, about 70% of which is used in road construction, is as a glue or binder mixed with particles of building aggregate to produce asphalt concrete. Other major uses of asphalt are asphalt waterproofing, including asphalt felt production and flat roof sealing.
In the actual use process of the asphalt pavement, cracking phenomenon can occur, especially the pavement with large vehicles going and going. Therefore, it is highly desirable to develop an anti-cracking asphalt material.
Patent CN112645642a discloses an anti-cracking 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 whisker, wherein the weight ratio of the mineral aggregate to the asphalt is 1: (4.18% -5.17%), the weight ratio of mineral aggregate to fibrilia is 1: (0.45% -0.6%), the weight ratio of mineral aggregate to super absorbent resin is 1: (0.28% -0.42%), the weight ratio of mineral aggregate to 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 itself 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 modifying agent; a filler; an antioxidant. The preparation method comprises the following steps: s1, mixing matrix asphalt and an antioxidant according to a proportion, stirring for 30-60min, and standing after stirring to obtain a first-stage 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; s3, adding 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 rubber, and the modification cost is high.
Disclosure of Invention
Accordingly, the invention aims to provide the anti-cracking asphalt with low cost, environmental protection and simple manufacture and the preparation method thereof.
The cracking-resistant asphalt consists of 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 foaming 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 the waste tires, crushing the waste tires into particles with the size of 200-30 meshes, adding lubricating oil and 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 by a double-screw extruder to obtain rubber particles;
step 3: and (3) enabling the rubber particles obtained in the step (2) to act for 5-10min under microwave irradiation to obtain the modified rubber powder.
Preferably, in the step 1, the lubricating oil is one or two of aromatic hydrocarbon oil and methylparaben; in the step 2, the mixing temperature is 140-160 ℃, and the mixing time is 10-15min; in the step 3, the microwave frequency is 1200MHz.
The preparation method of the cracking-resistant asphalt comprises the following preparation steps:
step 1: adding 1/2-2/3 of asphalt into modified rubber powder and skim rubber, fully mixing, heating and stirring for a period of time, and cooling;
step 2: taking the rest part of asphalt, adding foamed plastic and glass fiber, and stirring and mixing;
step 3: mixing the mixture obtained in step 1 and step 2, adding the anti-aging agent, the antioxidant and the plasticizer, heating and stirring
Preferably, in the step 1, the heating temperature is 140-160 ℃, the stirring speed is 200-300rpm/min, and the stirring time is 1-2h; in the step 2, the stirring temperature is 30-50 ℃, the stirring speed is 100-150rpm/min, and the stirring time is 1-2h; in the step 3, the stirring temperature is 20-30 ℃, the stirring speed is 50-150rpm/min, and the stirring time is 30min.
Compared with the prior art, the invention has the beneficial effects that:
1) The application utilizes the waste foamed plastic material, has low cost and can improve the environment;
2) The method adopts the skim rubber, utilizes the by-products of natural rubber production, and can reduce the cost;
3) The preparation method has the advantages of reasonable proportion of each component, simple preparation and good cracking resistance of the obtained product.
Detailed Description
For a clear and complete description of the technical solutions of the present invention, it is apparent that the inventors have described in connection with the embodiments, but that the following embodiments describe only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The cracking-resistant asphalt consists of 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.
Further, 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.
Further, 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 the waste tires, crushing the waste tires into particles with the size of 200-30 meshes, adding lubricating oil and plasticizer, and uniformly mixing;
step 2: and (3) allowing the mixture obtained in the step (1) to act for 5-10min under microwave irradiation, wherein the microwave frequency is 1200MHz.
The preparation method of the cracking-resistant asphalt comprises the following preparation steps:
step 1: adding 1/2-2/3 of asphalt into modified rubber powder and skim rubber, fully mixing, heating and stirring for a period of time, and cooling;
step 2: taking the rest part of asphalt, adding foamed plastic and glass fiber, and stirring and mixing;
step 3: mixing the mixture obtained in step 1 and step 2, adding the anti-aging agent, the antioxidant and the plasticizer, heating and stirring
Further, in the step 1, the heating temperature is 140-160 ℃, the stirring speed is 200-300rpm/min, and the stirring time is 1-2h.
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 with the size of 200-30 meshes, adding 0.4 part of aromatic hydrocarbon 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, wherein the mixing temperature is 150 ℃, the mixing time is 15min, and extruding and granulating the obtained mixture by a double-screw extruder to obtain rubber particles;
step 3: and (3) allowing the rubber particles obtained in the step (2) to act for 10min under the microwave irradiation of 1200MHz to obtain the modified rubber powder.
Sample 2 preparation method:
step 1: cleaning and drying 100 parts of waste tires, crushing the waste tires into particles with the size of 200-30 meshes, adding 0.5 part of methylparaben 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, wherein the mixing temperature is 160 ℃, the mixing time is 10min, and extruding and granulating the obtained mixture by a double-screw extruder to obtain rubber particles;
step 3: and (3) allowing the rubber particles obtained in the step (2) to act for 10min under the microwave irradiation of 1200MHz to obtain the modified rubber powder.
Sample 3 preparation method:
step 1: cleaning and drying 100 parts of waste tires, crushing the waste tires into particles with the size 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, wherein the mixing temperature is 140 ℃, the mixing time is 15min, and extruding and granulating the obtained mixture by a double-screw extruder to obtain rubber particles;
step 3: and (3) allowing the rubber particles obtained in the step (2) to act for 10min under the microwave irradiation of 1200MHz to obtain the modified rubber powder.
Preparing modified asphalt:
according to the formulation given in Table 1, and the following preparation methods, an anti-cracking asphalt was prepared
Step 1: adding modified rubber powder and skim rubber into 60 wt% of asphalt, fully mixing, heating and stirring for a period of time, and cooling; wherein the heating temperature is 140-160 ℃, the stirring speed is 200-300rpm/min, and the stirring time is 1-2h;
step 2: taking the rest part of asphalt, adding foamed plastic and glass fiber, and stirring and mixing; wherein the stirring temperature is 30-50deg.C, the stirring speed is 100-150rpm/min, and the stirring time is 1-2h.
Step 3: and (2) uniformly mixing the mixture obtained in the step (1) and the step (2), adding an anti-aging agent, an antioxidant and a plasticizer, heating and stirring to obtain the anti-aging agent.
Table 1:
| asphalt | Modified rubber powder | Foamed plastic | Rubber for cleaning rubber | Glass fiber | Anti-aging agent | Antioxidant | Plasticizer(s) | |
| Unit (B) | Parts by weight | Parts by weight | Parts by weight | Parts by weight | Parts by weight | Parts by weight | Parts by weight | Parts by weight |
| 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 was the same as in example 3, and the preparation method was as follows:
adding modified rubber powder, skim rubber, foamed plastic, glass fiber, an anti-aging agent, an antioxidant and a plasticizer into asphalt; stirring at 100deg.C at a stirring speed of 100-150rpm/min for 4 hr.
Comparative example 5:
the other proportions and steps were the same as in example 3 without adding modified rubber powder.
Comparative example 6:
the other proportions and steps were the same as in example 3 without addition of skim rubber.
Comparative example 7:
the other proportions and steps are the same as in example 3 without adding glass fibers and foamed plastic rubber powder.
Comparative example 8:
other proportions and steps were the same as in example 3 without addition of foamed plastic.
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 of the embodiment 3. Performance tests were performed on the crack-resistant asphalt in each example and each comparative example, and the test procedure was as follows:
(1) Ductility of the bitumen at low temperature (5 ℃) was determined according to T0605.
(2) The softening point of the modified asphalt was determined according to T0606.
(3) The penetration of the modified asphalt was determined according to T0604.
(4) The Brookfield viscosity of the modified asphalt is determined according to T0625.
The specific results are shown in Table 2.
| Ductility of | Softening point of | Penetration degree | Brookfield rotational viscosity | |
| Unit (B) | 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 foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
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, wherein the asphalt is a mixture of natural asphalt and petroleum asphalt, the weight ratio of the natural asphalt to the petroleum asphalt is 1:2-3, 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; 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 aromatic oil and 2-4 parts of plasticizer;
the preparation method of the cracking-resistant asphalt comprises the following steps:
step 1: adding 1/2-2/3 of asphalt into modified rubber powder and skim rubber, fully mixing, heating and stirring for a period of time, cooling at 140-160 ℃, stirring at 200-300rpm/min, and stirring for 1-2h;
step 2: adding the rest asphalt into foamed plastic and glass fiber, stirring and mixing at 30-50deg.C and stirring speed of 100-150rpm/min for 1-2 hr;
step 3: uniformly mixing the mixture obtained in the step 1 and the step 2, adding an anti-aging agent, an antioxidant and a plasticizer, heating and stirring at a stirring temperature of 20-30 ℃ and a stirring speed of 50-150rpm/min for 30min;
the modified rubber powder is prepared by the following preparation method:
step 1: cleaning and drying the waste tires, crushing the waste tires into particles with the particle size of 200-30 meshes, adding aromatic hydrocarbon oil and 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 by a double-screw extruder to obtain rubber particles;
step 3: and (3) enabling the rubber particles obtained in the step (2) to act for 5-10min under microwave irradiation to obtain the modified rubber powder.
2. The anti-cracking asphalt according to claim 1, which is composed of the following components in parts by weight: 85 parts of asphalt, 8 parts of modified rubber powder, 7 parts of foaming 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 anti-cracking asphalt according to claim 1, 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.
4. The anti-cracking asphalt according to claim 1, wherein in the step 2 of the preparation method of the modified rubber powder, the mixing temperature is 140-160 ℃, and the mixing time is 10-15min; in step 3, the microwave frequency is 1200MHz.
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| CN110330775A (en) * | 2019-06-04 | 2019-10-15 | 中电鼎康（天长）科技有限公司 | A kind of sensor efficient damping, buffering material and preparation method thereof |
| CN110511446A (en) * | 2019-08-28 | 2019-11-29 | 海南省先进天然橡胶复合材料工程研究中心有限公司 | A method of improving rubber solution rate in pitch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101831184B (en) * | 2010-03-23 | 2012-09-26 | 江汉大学 | Pitch modified from waste tire rubber powder and preparation method thereof |
| CN103059591A (en) * | 2013-01-28 | 2013-04-24 | 同济大学 | Composite modified asphalt of styrene butadiene styrene block polymer (SBS) and rubber powder and preparation method thereof |
| CN106046821B (en) * | 2016-08-16 | 2018-07-13 | 东莞泰和沥青产品有限公司 | A kind of foaming modification bituminous composition |
| CN108410187A (en) * | 2018-02-01 | 2018-08-17 | 北京欧美中科学技术研究院 | A kind of bituminous composition prepared using macromolecule |
| CN109294251A (en) * | 2018-09-17 | 2019-02-01 | 浙江潮源新型建材股份有限公司 | Compound rubber powder modified asphalt |
| CN112280321A (en) * | 2020-10-29 | 2021-01-29 | 怀化市华恒莫来石有限公司 | Asphalt and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110330775A (en) * | 2019-06-04 | 2019-10-15 | 中电鼎康（天长）科技有限公司 | A kind of sensor efficient damping, buffering material and preparation method thereof |
| CN110511446A (en) * | 2019-08-28 | 2019-11-29 | 海南省先进天然橡胶复合材料工程研究中心有限公司 | A method of improving rubber solution rate in pitch |
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