CN111117270A - High-strength asphalt and preparation method thereof - Google Patents
High-strength asphalt and preparation method thereof Download PDFInfo
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- CN111117270A CN111117270A CN202010017422.5A CN202010017422A CN111117270A CN 111117270 A CN111117270 A CN 111117270A CN 202010017422 A CN202010017422 A CN 202010017422A CN 111117270 A CN111117270 A CN 111117270A
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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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Abstract
The invention discloses high-strength asphalt, which comprises the following components in parts by weight: 750 portions of matrix asphalt and 1000 portions of; 45-65 parts of a first modifier; 2-5 parts of a stabilizer; 1-3 parts of a second modifier; 12-15 parts of a third modifier. Compared with the common modified asphalt, the high-strength asphalt has the characteristics of low penetration degree, high softening point and high dynamic viscosity at 60 ℃, and can obviously improve the high-temperature stability and the anti-rutting property of the pavement; the viscosity at 135 ℃ is small (less than 3Pa.s), is similar to that of the common modified asphalt, and is easy for pumping, mixing and paving construction; the adhesive toughness is high, the bond stress of asphalt and aggregate is strong, and the pavement is ensured to have higher integral strength.
Description
FIELD
The invention relates to the technical field of modified asphalt, in particular to high-strength asphalt and a preparation method thereof.
Background
The asphalt modifier is natural or artificial organic or inorganic material added into asphalt or asphalt mixture, and may be molten or dispersed in asphalt to improve the road performance of asphalt. For example, in order to improve the mechanical properties (strength, toughness, etc.) of asphalt, polymers, resins, plastics, carbon black, inorganic salts, etc. are added to increase the strength and toughness.
SUMMARY
In one aspect, the present disclosure relates to a high strength asphalt, comprising, in parts by weight: 750 portions of matrix asphalt and 1000 portions of; 45-65 parts of a first modifier; 2-5 parts of a stabilizer; 1-3 parts of a second modifier; 12-15 parts of a third modifier.
In another aspect, the present disclosure relates to a method for preparing high strength asphalt, comprising the steps of:
heating the base asphalt;
shearing the first modifier;
mixing a first modifier with matrix asphalt, and heating to obtain high-strength asphalt mother liquor;
adding a second modifier, controlling the temperature to be 175-180 ℃, and stirring;
adding a third modifier, controlling the temperature to be 175-180 ℃, and stirring to obtain the high-strength asphalt.
Detailed description of the invention
In the following description, certain specific details are included to provide a thorough understanding of various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth.
Unless otherwise required by the disclosure, throughout the specification and the appended claims, the words "comprise", "comprising", and "have" are to be construed in an open, inclusive sense, i.e., "including but not limited to".
Reference throughout the specification to "one embodiment," "an embodiment," "in another embodiment," or "in certain embodiments" means that a particular reference element, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" or "in another embodiment" or "in certain embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment, and furthermore, particular elements, structures, or features may be combined in any suitable manner in one or more embodiments.
Definition of
In the present disclosure, the term "base asphalt" refers to base asphalt modified by adding asphalt modifier, which is generally classified into ① asphalt, natural asphalt, lake asphalt, rock asphalt and seabed asphalt, petroleum asphalt, ② tar asphalt obtained by mining and refining petroleum, coal asphalt and wood asphalt.
In the present disclosure, the term "SBS" refers to a styrenic thermoplastic elastomer in which the polystyrene segment and the polybutadiene segment apparently exhibit a two-phase structure, polybutadiene is a continuous phase, polystyrene is a dispersed phase, and has 2 glass transition temperatures, the first glass transition temperature (Tg1) is-88 to-83 ℃, the second glass transition temperature (Tg2) is 90 ℃, the terminal polystyrene groups between Tg1 and Tg2 are aggregated together to form domains dispersed between the continuous phases of polybutadiene, and have the functions of physical crosslinking, chain segment fixation, vulcanization reinforcement and cold flow prevention, and have the high elasticity and fatigue resistance of vulcanized rubber, and when the temperature is raised to Tg2, the polystyrene phase softens and flows to make SBS have resin flow processability. The two-phase separation structure can form a spatial three-dimensional network structure with the asphalt matrix, so that the temperature performance, the tensile property, the elasticity, the cohesion adhesion performance, the stability of the mixture, the aging resistance and the like of the asphalt are effectively improved.
In the present disclosure, the term "HPT" refers to hexamethylphosphoric triamide, also known as hexamethylphosphoric triamide, which is a chemical substance that can be used as an additive to ethylene-propylene rubber.
In the present disclosure, the term "anti-rutting agent" refers to an asphalt modifier that prevents rutting disease in asphalt pavement for primary application purposes. Therefore, it is a functional definition, and all the related asphalt modifiers applied for anti-rutting purpose are anti-rutting agents in a broad sense.
In the present disclosure, the term "stabilizer" refers to an agent that keeps high polymer plastics, rubbers, synthetic fibers, etc. stable and prevents them from decomposing and aging.
Detailed Description
In one aspect, the present disclosure relates to a high strength asphalt, comprising, in parts by weight: 750 portions of matrix asphalt and 1000 portions of; 45-65 parts of a first modifier; 2-5 parts of a stabilizer; 1-3 parts of a second modifier; 12-15 parts of a third modifier.
In certain embodiments, the high tensile asphalt comprises, in parts by weight: 850 parts of matrix asphalt; 55 parts of a first modifier; 3 parts of a stabilizer; 2 parts of a second modifier; 13 parts of a third modifier.
In certain embodiments, illustrative examples of first modifiers that can be used in the present disclosure include, but are not limited to, styrene-butadiene-styrene block copolymer (SBS) modifiers.
In certain embodiments, illustrative examples of second modifiers that can be used in the present disclosure include, but are not limited to, hexamethylphosphoric triamide (HPT) modifiers.
In certain embodiments, illustrative examples of third modifiers that can be used in the present disclosure include, but are not limited to, anti-rutting agents.
In certain embodiments, illustrative examples of stabilizers that can be used in the present disclosure include, but are not limited to, sulfur.
In another aspect, the present disclosure relates to a method for preparing high strength asphalt, comprising the steps of:
heating the base asphalt;
shearing the first modifier;
mixing a first modifier with matrix asphalt, and heating to obtain high-strength asphalt mother liquor;
adding a second modifier, controlling the temperature to be 175-180 ℃, and stirring;
adding a third modifier, controlling the temperature to be 175-180 ℃, preferably 178 ℃, and stirring to obtain the high-strength asphalt.
In certain embodiments, the second modifier is added and the temperature is controlled at 178 ℃.
In certain embodiments, a third modifier is added and the temperature is controlled at 178 ℃.
In certain embodiments, it comprises, in parts by weight: 750 portions of matrix asphalt and 1000 portions of; 45-65 parts of a first modifier; 2-5 parts of a stabilizer; 1-3 parts of a second modifier; 12-15 parts of a third modifier.
In certain embodiments, the following are included, by weight: 850 parts of matrix asphalt; 55 parts of a first modifier; 3 parts of a stabilizer; 2 parts of a second modifier; 13 parts of a third modifier.
In certain embodiments, illustrative examples of first modifiers that can be used in the present disclosure include, but are not limited to, styrene-butadiene-styrene block copolymer (SBS) modifiers.
In certain embodiments, illustrative examples of second modifiers that can be used in the present disclosure include, but are not limited to, hexamethylphosphoric triamide (HPT) modifiers.
In certain embodiments, illustrative examples of third modifiers that can be used in the present disclosure include, but are not limited to, anti-rutting agents.
In certain embodiments, illustrative examples of stabilizers that can be used in the present disclosure include, but are not limited to, sulfur.
In certain embodiments, the base asphalt is heated to 185 to 190 ℃.
In certain embodiments, the base asphalt is heated to 188 ℃.
In certain embodiments, the first modifier is sheared for 15 to 30 min.
In certain embodiments, the first modifier is subjected to shear for 20 min.
In certain embodiments, the shearing further comprises a stirring step.
In certain embodiments, the agitation speed is 3500 to 4500 r/min.
In certain embodiments, the agitation speed is 4000 r/min.
In certain embodiments, the stirring time is from 1.5 to 2.2 hours while the second modifier is added.
In certain embodiments, the second modifier is added with a stirring time of 2 hours.
In certain embodiments, the stirring time is from 1.5 to 2.2 hours while the third modifier is added.
In certain embodiments, the stirring time is 2 hours while the third modifier is added.
Example 1
The embodiment discloses high-strength asphalt, which consists of the following components in part by weight:
| composition (I) | Added amount/kg |
| Base asphalt | 750 |
| First modifier | 45 |
| Stabilizer | 2 |
| Second modifier | 1 |
| Third modifier | 12 |
Wherein: the matrix asphalt is No. 70 matrix asphalt purchased from Korea Shuanglong company; the first modifier is SBS1607, purchased from Shandong Dashan road and bridge engineering Co., Ltd; the stabilizer is sulfur, and sulfur is purchased from Shanghai Shiyu Gongmao Co Ltd; the second modifier is HPT, purchased from Zhenjiangdao materials science and technology Co., Ltd, and the third modifier is anti-rutting master batch, purchased from Luoyang division of China Petroleum chemical industries Co., Ltd.
The preparation process comprises the following steps:
first, mother liquor preparation
1. Adding the matrix asphalt into a small test machine, and heating to 185 ℃;
2. opening a shearing machine, adding a first modifier, and shearing for 15 min;
3. starting stirring, controlling the temperature at 180 ℃, and stirring for 2.2 h;
4. controlling the temperature to be 180 ℃, adding a stabilizer, and continuously stirring for 1.5h to prepare high-strength asphalt mother liquor;
secondly, preparation of products
5. Adding a second modifier, controlling the temperature to be 175 ℃, and stirring for 20 min;
6. adding a third modifier, controlling the temperature to be 175 ℃, and stirring for 1.5h to obtain a high-strength asphalt finished product.
In step 2, the rotating speed of the stirring shearing machine is controlled to be 3500 r/min.
Example 2
The embodiment discloses high-strength asphalt, which consists of the following components in part by weight:
| composition (I) | Added amount/kg |
| Base asphalt | 850 |
| First modifier | 55 |
| Stabilizer | 3 |
| Second modifier | 2 |
| Third modifier | 13 |
Wherein: the matrix asphalt is No. 70 matrix asphalt purchased from Korea Shuanglong company; the first modifier is SBS1607, purchased from Shandong Dashan road and bridge engineering Co., Ltd; the stabilizer is sulfur, and sulfur is purchased from Shanghai Shiyu Gongmao Co Ltd; the second modifier is HPT, purchased from Zhenjiangdao materials science and technology Co., Ltd, and the third modifier is anti-rutting master batch, purchased from Luoyang division of China Petroleum chemical industries Co., Ltd.
The preparation process comprises the following steps:
first, mother liquor preparation
1. Adding the matrix asphalt into a small test machine, and heating to 188 ℃;
2. opening a shearing machine, adding a first modifier, and shearing for 20 min;
3. starting stirring, controlling the temperature to be 183 ℃, and stirring for 2.5 h;
4. controlling the temperature to be 183 ℃, adding a stabilizer, and continuously stirring for 2 hours to prepare high-strength asphalt mother liquor;
secondly, preparation of products
5. Adding a second modifier, controlling the temperature at 178 ℃, and stirring for 25 min;
6. adding a third modifier, controlling the temperature to 178 ℃, and stirring for 2 hours to obtain a high-strength asphalt finished product.
In step 2, the rotating speed of the stirring shearing machine is controlled to be 4000 r/min.
Example 3
The embodiment discloses high-strength asphalt, which consists of the following components in part by weight:
| composition (I) | Added amount/kg |
| Base asphalt | 1000 |
| First modifier | 65 |
| Stabilizer | 5 |
| Second modifier | 3 |
| Third modifier | 15 |
Wherein: the matrix asphalt is No. 70 matrix asphalt purchased from Korea Shuanglong company; the first modifier is SBS1607, purchased from Shandong Dashan road and bridge engineering Co., Ltd; the stabilizer is sulfur, and sulfur is purchased from Shanghai Shiyu Gongmao Co Ltd; the second modifier is HPT, purchased from Zhenjiangdao materials science and technology Co., Ltd, and the third modifier is anti-rutting master batch, purchased from Luoyang division of China Petroleum chemical industries Co., Ltd.
The preparation process comprises the following steps:
first, mother liquor preparation
1. Adding the matrix asphalt into a small test machine, and heating to 190 ℃;
2. starting a shearing machine, adding a first modifier, and shearing for 30 min;
3. starting stirring, controlling the temperature to be 185 ℃, and stirring for 3 hours;
4. controlling the temperature to be 185 ℃, adding a stabilizer, and continuously stirring for 2.2 hours to prepare high-strength asphalt mother liquor;
secondly, preparation of products
5. Adding a second modifier, controlling the temperature at 180 ℃, and stirring for 30 min;
6. adding a third modifier, controlling the temperature at 180 ℃, and stirring for 2.2 hours to obtain a high-strength asphalt finished product.
In step 2, the rotation speed of the stirring shearing machine is controlled to be 4500 r/min.
Test data
The experimental data of penetration, softening point, kinematic viscosity (60 ℃), kinematic viscosity (135 ℃) and toughness of the high-strength asphalt and the common modified asphalt of the examples 1 to 3 are as follows:
as can be seen from the above table, the high-strength asphalt of examples 1 to 3 has the characteristics of low penetration, high softening point and high dynamic viscosity at 60 ℃ compared with the common modified asphalt, and can significantly improve the high-temperature stability and rutting resistance of the pavement; the viscosity at 135 ℃ is small (less than 3Pa.s), is similar to that of the common modified asphalt, and is easy for pumping, mixing and paving construction; the adhesive toughness is high, the bond stress of asphalt and aggregate is strong, and the pavement is ensured to have higher integral strength.
From the foregoing it will be appreciated that, although specific embodiments of the disclosure have been described herein for purposes of illustration, various modifications or improvements may be made by those skilled in the art without departing from the spirit and scope of the disclosure, and that such modifications or improvements are intended to be within the scope of the appended claims.
Claims (10)
1. A high-strength asphalt comprises the following components in parts by weight:
750 portions of matrix asphalt and 1000 portions of;
45-65 parts of a first modifier;
2-5 parts of a stabilizer;
1-3 parts of a second modifier;
12-15 parts of a third modifier.
2. The high strength asphalt of claim 1, comprising, in parts by weight:
850 parts of matrix asphalt;
55 parts of a first modifier;
3 parts of a stabilizer;
2 parts of a second modifier;
13 parts of a third modifier.
3. The high strength asphalt of claim 1 or 2, wherein the first modifier is one or both of styrene-butadiene-styrene block copolymer (SBS) or polystyrene butadiene copolymer (SBR), the second modifier is hexamethylphosphoric triamide (HPT) modifier, the third modifier is anti-rutting agent, and the stabilizer is sulfur.
4. The preparation method of the high-strength asphalt comprises the following steps:
heating the base asphalt;
shearing the first modifier;
mixing a first modifier with matrix asphalt, and heating to obtain high-strength asphalt mother liquor;
adding a second modifier, controlling the temperature to be 175-180 ℃, preferably 178 ℃, and stirring;
adding a third modifier, controlling the temperature to be 175-180 ℃, preferably 178 ℃, and stirring to obtain the high-strength asphalt.
5. The preparation method according to claim 4, which comprises the following steps in parts by weight:
750 portions of matrix asphalt and 1000 portions of;
45-65 parts of a first modifier;
2-5 parts of a stabilizer;
1-3 parts of a second modifier;
12-15 parts of a third modifier.
6. The production method according to claim 4 or 5, which comprises:
850 parts of matrix asphalt;
55 parts of a first modifier;
3 parts of a stabilizer;
2 parts of a second modifier;
13 parts of a third modifier.
7. The method of any one of claims 4 to 6, wherein the first modifier is one or both of styrene-butadiene-styrene block copolymer (SBS) or polystyrene butadiene copolymer (SBR), the second modifier is hexamethylphosphoric triamide (HPT) modifier, the third modifier is an anti-rut agent, and the stabilizer is sulfur.
8. The method of any one of claims 4 to 7, wherein the base bitumen is heated to 185 to 190 ℃, preferably to 188 ℃.
9. The process according to any one of claims 4 to 8, wherein the first modifier is subjected to shear for 15 to 30min, preferably for 20min, preferably with a stirring step, preferably at a speed of 3500 to 4500r/min, preferably at a speed of 4000 r/min.
10. The process according to any one of claims 4 to 9, wherein the second modifier is added with stirring for a period of time of from 1.5 to 2.2 hours, preferably for a period of 2 hours; preferably, the third modifier is added, and the stirring time is 1.5 to 2.2 hours, and the stirring time is 2 hours.
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| CN202010017422.5A CN111117270A (en) | 2020-01-08 | 2020-01-08 | High-strength asphalt and preparation method thereof |
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| CN202010017422.5A CN111117270A (en) | 2020-01-08 | 2020-01-08 | High-strength asphalt and preparation method thereof |
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Cited By (1)
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| CN112759939A (en) * | 2020-12-29 | 2021-05-07 | 亿虎控股有限公司 | High-modulus modified asphalt and production method thereof |
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Effective date of registration: 20230105 Address after: 226000 No.2, Binjiang Road, Changjiang Town, Rugao City, Nantong City, Jiangsu Province Applicant after: Jiangsu High speed New Material Technology Co.,Ltd. Address before: 226000 No. 97, Yuejiang Road, Nantong City, Jiangsu Province Applicant before: NANTONG TONGSHA ASPHALT TECHNOLOGY Co.,Ltd. |