CN111289730A - Detection method for judging blended hard asphalt - Google Patents
Detection method for judging blended hard asphalt Download PDFInfo
- Publication number
- CN111289730A CN111289730A CN202010268087.6A CN202010268087A CN111289730A CN 111289730 A CN111289730 A CN 111289730A CN 202010268087 A CN202010268087 A CN 202010268087A CN 111289730 A CN111289730 A CN 111289730A
- Authority
- CN
- China
- Prior art keywords
- hard asphalt
- asphalt
- film oven
- hard
- sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/42—Road-making materials
Abstract
The invention relates to a detection method of blended hard asphalt, in particular to a detection method for judging whether hard asphalt with penetration (25 ℃, 0.1 mm) of 10-50 is prepared in a blending mode. The method is based on conventional index analysis of asphalt, combines the flash point of volatile substances, the quality change of a film oven and the penetration ratio index, has strong operability, and is convenient for judging whether hard asphalt is blended asphalt. When the mass change of the asphalt sample before and after the film oven is larger than 0.2%, the residual penetration ratio is less than 68%, and the flash point is lower than 295 ℃, the asphalt sample can be judged to be obtained in a blending mode.
Description
Technical Field
The invention belongs to the technical field of road materials, relates to a detection method of blended hard asphalt, and particularly relates to a detection method for judging whether the hard asphalt with the penetration (25 ℃, 0.1 mm) of 10-50 is the blended hard asphalt.
Background
Rutting is the primary form of asphalt pavement disease. The hard asphalt has the characteristics of hard texture, high viscosity, high stiffness, good adhesiveness with stone, high stiffness modulus of a hard asphalt mixture, good overall high-temperature stability, good anti-rutting capability, long service life of a road surface and the like, and is applied to domestic high-grade highways on a large scale.
At present, the production methods of the hard asphalt mainly comprise a distillation method, an oxidation method, a solvent deasphalting method and a blending method. The distillation method is to separate light components and wax oil components from crude oil by a common pressure reduction device, and finally obtain the hard asphalt meeting the index requirements. The oxidation method is that under the condition of a certain temperature and a certain ventilation quantity, asphalt with a large penetration degree generates a series of reactions such as dehydrogenation, oxidation, polymerization and the like under the action of high temperature and oxygen, and finally hard asphalt is obtained. The solvent deasphalting method is to separate the components by using light hydrocarbon as solvent and utilizing the principle of different solubilities to obtain the hard asphalt. The mixing method is to mix and stir the asphalt or oil slurry with large penetration degree and the super hard asphalt (including lake asphalt, rock asphalt, deoiled asphalt) or anti-rutting agent to obtain the hard asphalt.
The hard asphalt produced by adopting the straight-run method, the oxidation method and the solvent deasphalting method has stable quality, small evaporation capacity and good high-temperature anti-rutting property, anti-shearing force and anti-fatigue property. The hard asphalt produced by the blending method has unstable product quality and poor road performance, and has the following defects:
1. blending two or more different products, wherein the obtained hard asphalt product has unstable quality and large index fluctuation of each batch of products;
2. because the light components and the heavy components are blended, the light components have large volatilization amount and large mass loss in the processes of heating, storing, transporting and blending;
3. with the increase of the quality loss, the performance of the hard asphalt product is changed;
4. the road performance of the mixed hard asphalt mixture is poor.
Disclosure of Invention
In order to solve the problems, the invention provides a detection method for judging whether the blended hard asphalt is processed, wherein whether the processing technology of the hard asphalt is blended or not is judged by analyzing and comparing the performance of the hard asphalt.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
1. a detection method for judging blended hard asphalt and non-blended hard asphalt is characterized by comprising the following steps: and judging whether the hard asphalt sample is obtained by blending and processing a softer component and a harder component by adopting asphalt flash points, quality change of a film oven and a penetration ratio index.
The hard asphalt is hard asphalt with a penetration (25 ℃, 0.1 mm) of 10-50.
2. The method for detecting a tempered hard asphalt according to claim 1, wherein the method comprises the steps of:
(1) detecting and analyzing the hard asphalt sample by adopting a Cleveland open flash point tester to obtain open flash point data of the sample;
(2) adopting a film oven test to obtain the front and rear mass of the hard asphalt sample film oven, and calculating to obtain the mass change data of the hard asphalt sample;
(3) and (3) adopting a film oven test to obtain the penetration data of the hard asphalt sample at 25 ℃ before and after the film oven, and calculating to obtain the residual penetration ratio of the hard asphalt sample.
3. The method as claimed in claim 2, wherein the method is used to determine whether the value of the open flash point of the hard asphalt sample measured by the Cleveland open flash point tester is greater than 295 ℃.
4. The method for detecting blended hard asphalt according to claim 2, wherein the method is characterized by determining whether the mass change of the hard asphalt sample before and after the film oven is less than 0.2%.
5. The method for detecting blended hard asphalt according to claim 2, wherein the ratio of the residual penetration before and after the film oven of the hard asphalt sample is determined to be greater than 68%.
6. The blended hard asphalt of claim 1, characterized in that it has a flash point of less than 295 ℃, a mass change of more than 0.2% before and after the film oven, and a penetration ratio of less than 68% before and after the film oven.
7. The non-tempered hard asphalt of claim 1, wherein the flash point is higher than 295 ℃, the mass change before and after the film oven is less than 0.2%, and the penetration ratio before and after the film oven is greater than 68%.
Drawings
None.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Blending No. 30 asphalt by adopting No. 70 heavy traffic asphalt and solution asphalt, wherein No. 70 heavy traffic asphalt/solution asphalt =57/43, analyzing the performance index of No. 30 asphalt after blending, comparing with the straight-run No. 30 asphalt, and the detailed indexes are shown in Table 1:
TABLE 130 comparison of the Properties of the blended bitumens with the straight run bitumens
Example 2
No. 70 heavy traffic asphalt and an anti-rutting agent are adopted to blend No. 30 asphalt, No. 70 heavy traffic asphalt/anti-rutting agent =64/36, the performance index of No. 30 asphalt is analyzed after blending and compared with the straight-run No. 30 asphalt, and the detailed indexes are shown in Table 2:
TABLE 230 comparison of the Properties of the harmonized asphalt with straight-run asphalt
Example 3
Blending No. 30 asphalt by adopting No. 70 heavy traffic asphalt and coal liquefaction residue, wherein No. 70 heavy traffic asphalt/coal liquefaction residue =80/20, analyzing the performance index of No. 30 asphalt after blending, and comparing with the straight-run No. 30 asphalt, wherein the detailed indexes are shown in Table 3:
TABLE 330 comparison of Properties of the harmonized asphalt with straight-run asphalt
It can be seen from examples 1, 2 and 3 that the softening point, penetration and ductility of the blended hard asphalt No. 30 and the straight-run hard asphalt No. 30 are similar and are not distinguished, but the ratio of the flash point to the mass change after the film oven test and the residual penetration is larger, so that the flash point of the blended hard asphalt is lower, and the mass change before and after the film oven test is larger.
Claims (7)
1. A detection method for judging blended hard asphalt and non-blended hard asphalt is characterized by comprising the following steps: judging whether the hard asphalt sample is obtained by blending and processing a softer component and a harder component by adopting asphalt flash points, quality change of a film oven and a penetration ratio index,
the hard asphalt is hard asphalt with a penetration (25 ℃, 0.1 mm) of 10-50.
2. The method for detecting a tempered hard asphalt according to claim 1, wherein the method comprises the steps of:
(1) detecting and analyzing the hard asphalt sample by adopting a Cleveland open flash point tester to obtain open flash point data of the sample;
(2) adopting a film oven test to obtain the front and rear mass of the hard asphalt sample film oven, and calculating to obtain the mass change data of the hard asphalt sample;
(3) and (3) adopting a film oven test to obtain the penetration data of the hard asphalt sample at 25 ℃ before and after the film oven, and calculating to obtain the residual penetration ratio of the hard asphalt sample.
3. The method as claimed in claim 2, wherein the method is used to determine whether the value of the open flash point of the hard asphalt sample measured by the Cleveland open flash point tester is greater than 295 ℃.
4. The method for detecting blended hard asphalt according to claim 2, wherein the method is characterized by determining whether the mass change of the hard asphalt sample before and after the film oven is less than 0.2%.
5. The method for detecting blended hard asphalt according to claim 2, wherein the ratio of the residual penetration before and after the film oven of the hard asphalt sample is determined to be greater than 68%.
6. The blended hard asphalt of claim 1, characterized in that it has a flash point of less than 295 ℃, a mass change of more than 0.2% before and after the film oven, and a penetration ratio of less than 68% before and after the film oven.
7. The non-tempered hard asphalt of claim 1, wherein the flash point is higher than 295 ℃, the mass change before and after the film oven is less than 0.2%, and the penetration ratio before and after the film oven is greater than 68%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010268087.6A CN111289730A (en) | 2020-04-08 | 2020-04-08 | Detection method for judging blended hard asphalt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010268087.6A CN111289730A (en) | 2020-04-08 | 2020-04-08 | Detection method for judging blended hard asphalt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111289730A true CN111289730A (en) | 2020-06-16 |
Family
ID=71026132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010268087.6A Pending CN111289730A (en) | 2020-04-08 | 2020-04-08 | Detection method for judging blended hard asphalt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111289730A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114674738A (en) * | 2022-04-13 | 2022-06-28 | 西南交通大学 | Device and method for detecting exudation degree of wax oil in asphalt |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106810881A (en) * | 2015-11-27 | 2017-06-09 | 中国石油化工股份有限公司 | A kind of graininess oil hard grades of bitumen and blending hard grades of bitumen and preparation method thereof |
| CN107655783A (en) * | 2017-08-30 | 2018-02-02 | 江苏诺路桥工程检测有限公司 | A kind of detection method for judging mediation hard grades of bitumen |
-
2020
- 2020-04-08 CN CN202010268087.6A patent/CN111289730A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106810881A (en) * | 2015-11-27 | 2017-06-09 | 中国石油化工股份有限公司 | A kind of graininess oil hard grades of bitumen and blending hard grades of bitumen and preparation method thereof |
| CN107655783A (en) * | 2017-08-30 | 2018-02-02 | 江苏诺路桥工程检测有限公司 | A kind of detection method for judging mediation hard grades of bitumen |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114674738A (en) * | 2022-04-13 | 2022-06-28 | 西南交通大学 | Device and method for detecting exudation degree of wax oil in asphalt |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhu et al. | Recycling long-term-aged asphalts using bio-binder/plasticizer-based rejuvenator | |
| D'Angelo et al. | Practical use of multiple stress creep and recovery test: Characterization of styrene–butadiene–styrene dispersion and other additives in polymer-modified asphalt binders | |
| Presti et al. | Towards storage-stable high-content recycled tyre rubber modified bitumen | |
| Oyekunle | Certain relationships between chemical composition and properties of petroleum asphalts from different origin | |
| US20090149577A1 (en) | Using Excess Levels of Metal Salts to Improve Properties when Incorporating Polymers in Asphalt | |
| Hemida et al. | Monitoring separation tendency of partial asphalt replacement by crumb rubber modifier and guayule resin | |
| Liu et al. | Investigation of physiochemical and rheological properties of waste cooking oil/SBS/EVA composite modified petroleum asphalt | |
| Harooni Jamaloei et al. | Rheological and mechanical properties of bitumen modified with Sasobit, polyethylene, paraffin, and their mixture | |
| US6972047B2 (en) | Incorporation of gilsonite into asphalt compositions | |
| CN111289730A (en) | Detection method for judging blended hard asphalt | |
| CN106675049A (en) | Method for preparing tetrahydrofuran soluble substance-modified asphalt in direct coal liquefaction residues | |
| Ren et al. | Multi-component analysis, molecular model construction, and thermodynamics performance prediction on various rejuvenators of aged bitumen | |
| EP3208288A1 (en) | Process for preparing a polymerized cashew nut shell liquid and its use for the preparation of a bitumen composition | |
| Radziszewski et al. | Asphalt rubber as an alternative of polymer modified bitumen | |
| CN1481502A (en) | Mass spectrometric multivariate analiysis of asphalts | |
| He et al. | Research on conventional performance of modified bio-asphalt | |
| Nejad et al. | An investigation on the effect of SBS+ vacuum bottoms residue modification on rheological characteristics of asphalt binder | |
| Biro et al. | Asphalt rubber versus other modified bitumens | |
| D’Angelo | Effect of polyphosphoric acid on asphalt binder properties | |
| Zhang et al. | Roles of recycled oils, polyphosphoric acid and sulfur on chemo-rheological and morphological properties of high-viscosity modified asphalt | |
| CN111087828B (en) | Sasobit warm mix asphalt and preparation method thereof | |
| Firoozifar et al. | Investigation of novel methods to improve the storage stability and low temperature susceptivity of polyethylene modified bitumens | |
| JP3695872B2 (en) | Modified asphalt composition | |
| CN107655783A (en) | A kind of detection method for judging mediation hard grades of bitumen | |
| Enıeb et al. | Temperature sensitivity and performance evaluation of asphalt cement incorporating different types of waste polymers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200616 |