CN112304727A - Rapid sample preparation method of direct-throwing high-viscosity modified asphalt - Google Patents
Rapid sample preparation method of direct-throwing high-viscosity modified asphalt Download PDFInfo
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- CN112304727A CN112304727A CN202011286047.0A CN202011286047A CN112304727A CN 112304727 A CN112304727 A CN 112304727A CN 202011286047 A CN202011286047 A CN 202011286047A CN 112304727 A CN112304727 A CN 112304727A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention discloses a rapid sample preparation method of direct-vat-set high-viscosity modified asphalt, which comprises the following steps: adding a first predetermined amount of a high viscosity modifier to a vessel; adding a second predetermined amount of base asphalt to the vessel, wherein the base asphalt is heated to a first predetermined temperature and the first predetermined amount is the same as the second predetermined amount; mixing the high viscosity modifier and the matrix asphalt and heating to a second preset temperature; after the first preset time, adding a third preset amount of the matrix asphalt into the container again; after a second preset time, adding a fourth preset amount of the matrix asphalt into the container again; stirring and heating to a third preset temperature; and placing the mixture on a colloid mill, and shearing the mixture at a high speed for a third preset time to form the high-viscosity modified asphalt. The method can be used for quickly preparing the high-viscosity asphalt modified sample, is flexible in process, simple to operate and short in sample preparation time, and can avoid high-temperature aging of asphalt.
Description
Technical Field
The invention relates to the field of road construction, and further relates to a rapid sample preparation method of direct-throwing high-viscosity modified asphalt.
Background
The high-viscosity modified asphalt is modified asphalt with higher viscosity and softening point, the dynamic viscosity at 60 ℃ is not lower than 20000pa.s, the softening point is not lower than 80 ℃, and the high-viscosity modified asphalt has good high and low temperature performance, is widely used for paving high-grade special asphalt such as drainage asphalt pavements, steel bridge surfaces and the like, and can also be used for heavy traffic roads.
The preparation method of the high-viscosity modified asphalt can be generally divided into a pre-mixing type and a direct-throwing type, the pre-mixing type modification is finished asphalt which is produced in advance by an asphalt production factory according to a certain formula and process, and the high-viscosity modified asphalt has the advantages of stable quality, controllable process and the defects of long processing time, high storage temperature, partial aging of the asphalt and inconvenience for long-distance transportation. The direct-throwing modification is that the modifier is directly added into the aggregate at a certain temperature and is dried and mixed for several seconds until the modifier is fully melted and uniformly dispersed in the aggregate, then the matrix asphalt at a certain temperature is added for wet mixing, and the asphalt is modified in the stirring process to form the high-viscosity modified asphalt mixture. The method has the advantages that the operation is simple, the transportation is cheap, the factory processing link is skipped, and the storage and the aging of the asphalt are avoided; however, the high viscosity modified asphalt cannot be tested in the process, and only the final asphalt mixture can be tested.
In view of the foregoing, there is a need to provide a rapid sample preparation method for direct vat set high viscosity asphalt.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a quick sample preparation method for direct-vat high-viscosity asphalt, which can be used for quickly preparing a high-viscosity asphalt modified sample, has flexible process, simple operation and short sample preparation time, and can avoid high-temperature aging of asphalt.
In order to achieve the above object, the present invention provides a method for rapidly preparing a direct vat type high viscosity modified asphalt, comprising:
adding a first predetermined amount of a high viscosity modifier to a vessel;
adding a second predetermined amount of base asphalt to the vessel, wherein the base asphalt is heated to a first predetermined temperature and the first predetermined amount is the same as the second predetermined amount;
mixing the high viscosity modifier and the matrix asphalt and heating to a second preset temperature;
after the first preset time, adding a third preset amount of the matrix asphalt into the container again;
after a second preset time, adding a fourth preset amount of the matrix asphalt into the container again;
stirring and heating to a third preset temperature;
and placing the mixture on a colloid mill, and shearing the mixture at a high speed for a third preset time to form the high-viscosity modified asphalt.
Preferably, the first preset temperature of the base asphalt is 130 ℃ to 150 ℃.
Preferably, the second preset temperature is in the range of 170 ℃ to 190 ℃.
Preferably, the first preset time is 8-15 minutes.
Preferably, the second preset time is 3-6 minutes.
Preferably, the third preset time is 2-5 minutes.
Preferably, the third temperature is in the range of 178 ℃ to 182 ℃.
Preferably, the base asphalt is petrochemical Jinshan No. 70.
Preferably, the high viscosity modifier is a RST high viscosity modifier.
Preferably, the first predetermined amount of the high viscosity modifier is mixed with the second predetermined amount of the base asphalt in the same amount as the third predetermined amount of the base asphalt.
The rapid sample preparation method of the direct-vat-set high-viscosity modified asphalt provided by the invention has at least one of the following beneficial effects:
1. according to the rapid sample preparation method of the direct-vat high-viscosity modified asphalt provided by the invention, a high-viscosity asphalt modified sample can be rapidly prepared, the process is flexible, the operation is simple, the sample preparation time is short, and the high-temperature aging of the asphalt can be avoided.
2. The rapid sample preparation method of the direct-throwing high-viscosity modified asphalt provided by the invention comprises the steps of melting and dispersing a direct-throwing modifier by a three-step method in times, and simultaneously shearing the fully melted asphalt at a high speed to form a sample of the high-viscosity modified asphalt. Solves the problem that the high-viscosity modified asphalt can not be detected in the production process of the direct-vat-set high-viscosity modifier.
Drawings
The above features, technical features, advantages and modes of realisation of the present invention will be further described in the following detailed description of preferred embodiments thereof, which is to be read in connection with the accompanying drawings.
FIG. 1 is a flow chart of the rapid sample preparation method of the direct vat set high viscosity modified asphalt of the invention;
FIG. 2 is a microstructure diagram of a sample of high-viscosity modified asphalt prepared by the rapid sample preparation method of direct-vat high-viscosity modified asphalt provided by the invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, only the parts relevant to the invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
Referring to the attached drawings 1 and 2 of the specification, the invention provides a rapid sample preparation method of direct-vat high-viscosity modified asphalt, which adopts a three-step method to melt and disperse a direct-vat modifier in several times, and simultaneously carries out high-speed shearing on fully melted asphalt to form a sample of high-viscosity modified asphalt, so that the problem that the direct-vat high-viscosity modifier cannot detect the high-viscosity modified asphalt in the production process can be solved.
Referring to the attached figure 1 of the specification, the rapid sample preparation method of the direct vat set high viscosity modified asphalt comprises the following steps:
101: adding a first predetermined amount of a high viscosity modifier to a vessel;
102: adding a second predetermined amount of base asphalt to the vessel, wherein the base asphalt is heated to a first predetermined temperature and the first predetermined amount is the same as the second predetermined amount;
103: mixing the high viscosity modifier and the matrix asphalt and heating to a second preset temperature;
104: after the first preset time, adding a third preset amount of the matrix asphalt into the container again;
105: after a second preset time, adding a fourth preset amount of the matrix asphalt into the container again;
106: stirring and heating to a third preset temperature;
107: and placing the mixture on a colloid mill, and shearing the mixture at a high speed for a third preset time to form the high-viscosity modified asphalt.
The rapid sample preparation method of the direct-vat high-viscosity modified asphalt provided by the invention adopts a three-step method to prepare the high-viscosity modified asphalt, has flexible process and simple operation, can complete the whole sample preparation process within thirty minutes, is far shorter than the time of 2-3 hours of factory processing, and can avoid the high-temperature aging of the asphalt.
In the step 101, the high viscosity modifier is preferably a RST high viscosity modifier. The container is preferably a vessel capable of being heated, such as a pot, a reaction kettle, or the like.
In step 102, the second predetermined amount of the base asphalt added to the container is preferably petrochemical Jinshan No. 70. Preferably, the first preset temperature of the base asphalt is 130 ℃ to 150 ℃. Preferably, the amount of the second predetermined amount of the base asphalt added to the vessel in the step 102 is the same as the amount of the first predetermined amount of the high-viscosity modifier added in the step 101.
That is, the base asphalt needs to be preheated to 130 ℃ to 150 ℃ before the second predetermined amount of the base asphalt is added to the container.
In step 103, after the second preset amount of the base asphalt is added into the container, the heating and stirring of the mixture to the second preset temperature are started until the mixture is in a non-flowable gel state and has no obvious granular particles. Preferably, the second preset temperature is in the range of 170 ℃ to 190 ℃.
Preferably, in the step 103, the first preset time for stirring the mixture of the high viscosity modifier and the base asphalt is 8 to 15 minutes.
In step 104, the third predetermined amount of the base asphalt is added to the container in the same amount as the mixture of the first predetermined amount of the high viscosity modifier and the second predetermined amount of the base asphalt in the container. For example, if the first predetermined amount is 120g, the second predetermined amount is 130 g, and the third predetermined amount is 250 g.
In the step 104, after a third preset amount of the base asphalt is added into the container, the temperature in the container is maintained in the range of 170 ℃ to 190 ℃ of the second preset temperature, and the stirring is continued for the second preset time until the mixture is changed from the non-flowing gel state to the semi-flowing mixed liquid. Preferably, the second preset time is 3-6 minutes.
In the step 105, after the second preset time, adding the fourth preset amount of the matrix asphalt into the container again, and heating and stirring to the third preset temperature. Preferably, the third preset temperature is in the range of 178-182 ℃. Preferably 180 deg.c. And then placing the container on a colloid mill, and shearing the container at a high speed for the third preset time to form the final high-viscosity modified asphalt which can be used for sample preparation detection. Preferably, the third preset time is 2-5 minutes.
Illustratively, exemplified by the RST high viscosity modifier, the base asphalt is prepared using the medium petrochemical kingdom mountain No. 70, by RST: preparing the high-viscosity modified asphalt according to the proportion of 12:88 in Jinshan No. 70.
The "three-step" procedure provided above is as follows
The first step is as follows: 120g of gRST is weighed and spread in a pot, about 120g of Jinshan No. 70 asphalt at 140 ℃ is poured, the mixture is heated and stirred to 170-190 ℃ at the same time, the stirring is continued for 10 minutes until the mixture is gelatinous, and no obvious unmelted particles are observed.
The second step is that: about 250g of Jinshan No. 70 asphalt is added continuously, and the mixture is kept stirring for 5 minutes at the temperature of 170-190 ℃ until a flowable mixed solution is presented.
The third step: continuously adding about 510g of Jinshan No. 70 asphalt (the total amount of the modified asphalt is 1000g), heating and stirring to 180 ℃, placing the mixture in a colloid mill, shearing at a high speed for 3 minutes, observing that the surface of the modified asphalt is uniform and has no small particles to form high-viscosity modified asphalt, and pouring a sample for detection after removing surface bubbles.
Referring to the attached figure 2 of the specification, the microstructure of the prepared asphalt is observed by a microscope, the modification effect is judged in advance, and the reticular structure is continuous and uniform, which shows that the modification effect is good.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (10)
1. The rapid sample preparation method of the direct-throwing high-viscosity modified asphalt is characterized by comprising the following steps of:
adding a first predetermined amount of a high viscosity modifier to a vessel;
adding a second predetermined amount of base asphalt to the vessel, wherein the base asphalt is heated to a first predetermined temperature and the first predetermined amount is the same as the second predetermined amount;
mixing the high viscosity modifier and the matrix asphalt and heating to a second preset temperature;
after the first preset time, adding a third preset amount of the matrix asphalt into the container again;
after a second preset time, adding a fourth preset amount of the matrix asphalt into the container again;
stirring and heating to a third preset temperature;
and placing the mixture on a colloid mill, and shearing the mixture at a high speed for a third preset time to form the high-viscosity modified asphalt.
2. The method for rapid sample preparation of direct vat set high viscosity modified asphalt according to claim 1, wherein the first predetermined temperature of the base asphalt is 130 ℃ to 150 ℃.
3. The method for rapidly sampling a direct vat set high viscosity modified asphalt according to claim 1, wherein the second predetermined temperature is in the range of 170 ℃ to 190 ℃.
4. The method for rapidly sampling a direct vat set high viscosity modified asphalt according to claim 1, wherein the first predetermined time is 8-15 minutes.
5. The method for rapidly sampling a direct vat set high viscosity modified asphalt according to claim 1, wherein the second predetermined time is 3-6 minutes.
6. The method for rapidly sampling a direct vat set high viscosity modified asphalt according to claim 1, wherein the third predetermined time is 2-5 minutes.
7. The method for rapidly sampling a direct vat set high viscosity modified asphalt according to claim 1, wherein the third temperature is in the range of 178-182 ℃.
8. The method for rapid sampling of direct vat set high viscosity modified asphalt according to any one of claims 1 to 7, wherein the base asphalt is jinshan 70 petrochemical.
9. The method for rapid prototyping of high-viscosity modified asphalt from the perspective of claim 8, wherein the high-viscosity modifier is RST high-viscosity modifier.
10. The method for rapidly sampling a direct vat set high viscosity modified asphalt according to claim 8, wherein the first predetermined amount of the high viscosity modifier mixed with the second predetermined amount of the base asphalt is the same as the third predetermined amount of the base asphalt.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08101100A (en) * | 1994-09-30 | 1996-04-16 | Cosmo Toreede & Service:Kk | Method and equipment for conditioning bituminous sample on-line |
| EP1072646A1 (en) * | 1999-07-28 | 2001-01-31 | Bridgestone Corporation | Asphalt modifier |
| CA2762597A1 (en) * | 2010-12-21 | 2012-06-21 | Invensys Systems, Inc. | Offline analyzer system and method for multivariate characterization of properties in crude and heavy hydrocarbon oils |
| CN107142810A (en) * | 2017-05-23 | 2017-09-08 | 济南汇通联合市政工程有限责任公司 | A kind of high-viscosity bitumen modifier asphalt paving construction method |
| CN108892961A (en) * | 2018-07-26 | 2018-11-27 | 江苏增光复合材料科技有限公司 | A kind of high viscosity modified emulsifying asphalt and preparation method thereof |
| CN110922768A (en) * | 2018-09-20 | 2020-03-27 | 中国石油化工股份有限公司 | Direct-throwing type high-viscosity asphalt modifier and preparation method thereof |
| US20200308052A1 (en) * | 2016-05-23 | 2020-10-01 | Jiangsu Tiannuo Road Materials Technology Co.,Ltd | Plant mix warm regenerated asphalt mixture and preparation method therefor |
| CN111777863A (en) * | 2020-05-26 | 2020-10-16 | 四川公路桥梁建设集团有限公司 | Preparation method of high-viscosity modified asphalt |
-
2020
- 2020-11-17 CN CN202011286047.0A patent/CN112304727B/en active Active
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|---|---|---|---|---|
| JPH08101100A (en) * | 1994-09-30 | 1996-04-16 | Cosmo Toreede & Service:Kk | Method and equipment for conditioning bituminous sample on-line |
| EP1072646A1 (en) * | 1999-07-28 | 2001-01-31 | Bridgestone Corporation | Asphalt modifier |
| CA2762597A1 (en) * | 2010-12-21 | 2012-06-21 | Invensys Systems, Inc. | Offline analyzer system and method for multivariate characterization of properties in crude and heavy hydrocarbon oils |
| US20200308052A1 (en) * | 2016-05-23 | 2020-10-01 | Jiangsu Tiannuo Road Materials Technology Co.,Ltd | Plant mix warm regenerated asphalt mixture and preparation method therefor |
| CN107142810A (en) * | 2017-05-23 | 2017-09-08 | 济南汇通联合市政工程有限责任公司 | A kind of high-viscosity bitumen modifier asphalt paving construction method |
| CN108892961A (en) * | 2018-07-26 | 2018-11-27 | 江苏增光复合材料科技有限公司 | A kind of high viscosity modified emulsifying asphalt and preparation method thereof |
| CN110922768A (en) * | 2018-09-20 | 2020-03-27 | 中国石油化工股份有限公司 | Direct-throwing type high-viscosity asphalt modifier and preparation method thereof |
| CN111777863A (en) * | 2020-05-26 | 2020-10-16 | 四川公路桥梁建设集团有限公司 | Preparation method of high-viscosity modified asphalt |
Non-Patent Citations (2)
| Title |
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