CN112098581A - Evaluation method for selective adsorption of rubber powder on asphalt components and molecular groups - Google Patents
Evaluation method for selective adsorption of rubber powder on asphalt components and molecular groups Download PDFInfo
- Publication number
- CN112098581A CN112098581A CN202010844263.6A CN202010844263A CN112098581A CN 112098581 A CN112098581 A CN 112098581A CN 202010844263 A CN202010844263 A CN 202010844263A CN 112098581 A CN112098581 A CN 112098581A
- Authority
- CN
- China
- Prior art keywords
- asphalt
- components
- rubber
- molecular weight
- rubber powder
- 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
- 239000010426 asphalt Substances 0.000 title claims abstract description 230
- 229920001971 elastomer Polymers 0.000 title claims abstract description 176
- 239000005060 rubber Substances 0.000 title claims abstract description 175
- 239000000843 powder Substances 0.000 title claims abstract description 112
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 45
- 238000011156 evaluation Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 35
- 125000003118 aryl group Chemical group 0.000 claims abstract description 27
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 17
- 239000001257 hydrogen Substances 0.000 claims abstract description 17
- 238000005303 weighing Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 14
- 239000000084 colloidal system Substances 0.000 claims abstract description 12
- 238000005516 engineering process Methods 0.000 claims abstract description 12
- 230000005484 gravity Effects 0.000 claims abstract description 11
- 230000008859 change Effects 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000005227 gel permeation chromatography Methods 0.000 claims abstract description 10
- 239000011148 porous material Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims description 22
- 238000012360 testing method Methods 0.000 claims description 17
- 239000012085 test solution Substances 0.000 claims description 16
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010828 elution Methods 0.000 claims description 5
- 239000000741 silica gel Substances 0.000 claims description 5
- 229910002027 silica gel Inorganic materials 0.000 claims description 5
- 230000008961 swelling Effects 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004793 Polystyrene Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 229920002223 polystyrene Polymers 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 238000010008 shearing Methods 0.000 claims description 4
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 4
- 238000000752 ionisation method Methods 0.000 claims description 2
- 239000011387 rubberized asphalt concrete Substances 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 5
- 239000000306 component Substances 0.000 description 180
- 238000010521 absorption reaction Methods 0.000 description 29
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 9
- 239000010920 waste tyre Substances 0.000 description 8
- 238000011161 development Methods 0.000 description 7
- 230000018109 developmental process Effects 0.000 description 7
- 238000000926 separation method Methods 0.000 description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 6
- 239000003292 glue Substances 0.000 description 6
- 239000000523 sample Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 241000282414 Homo sapiens Species 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003205 fragrance Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000012470 diluted sample Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229920006247 high-performance elastomer Polymers 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000012936 vulcanization activator Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/90—Plate chromatography, e.g. thin layer or paper chromatography
-
- 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
- G01N1/34—Purifying; Cleaning
-
- 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
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N30/14—Preparation by elimination of some components
-
- 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
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
- G01N2001/4088—Concentrating samples by other techniques involving separation of suspended solids filtration
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses an evaluation method for selective adsorption of rubber powder to asphalt components and molecular groups, which comprises the following steps of firstly, respectively heating original asphalt and rubber asphalt prepared from the original asphalt to a flowing state, pouring the heated original asphalt into superfine round hole sieve pores for gravity filtration, collecting undersize asphalt, and weighing the undersize asphalt to be measured; then, separating the asphalt into four components of asphaltene, saturated components, aromatic components and colloid by using a rod-shaped thin-layer chromatography-hydrogen flame ion method, and calculating the proportion of the four components; then, respectively detecting and identifying the molecular weight of the asphalt by utilizing a gel permeation chromatography technology; and finally, quantitatively judging the adsorption degree of the rubber powder to the asphalt component according to the four components of the asphalt and the mass relation between the molecular weight change amplitude and the added rubber powder. In a word, the method has the advantages of high experimental precision, perfect maturity, simple operation, high speed, accurate data, good reproducibility and less pollution, and is suitable for being widely applied to rubber asphalt research.
Description
Technical Field
The invention belongs to the technical field of modified asphalt performance testing, and particularly relates to an evaluation method for selective adsorption of rubber powder on asphalt components and molecular groups.
Background
At present, the problems caused by development are increasingly prominent, and the survival crisis forces countries all over the world to directly develop a series of problems such as environmental deterioration and energy consumption caused by economic development. The development of circular economy, the way of sustainable development, the achievement of consensus, energy conservation and emission reduction become the focus of general attention at present, and the world has entered the low-carbon era. Along with the rapid development of the traffic industry, the automobile holding capacity in China is rapidly increased, the annual average growth rate is about 14.5%, and the automobile holding capacity in China is expected to break through 2 hundred million automobiles in 2020. The annual output of waste tires, which are one of the most important solid wastes in the automobile industry, can not keep up with the consumption speed, and the stacking of a large amount of waste tires causes severe environmental problems. Statistically, millions of waste tires are generated all over the world every year, about 14 hundred million tons of tires are sold all over the world every year, and the tires are discarded into the waste tires within 3 to 5 years, which means that most of the waste tires are stacked and abandoned every year, the quantity is increased year by year, and huge pressure is brought to ecological environment protection. How to effectively solve the problem of black pollution becomes an important issue influencing the development of the automobile industry in China and even influencing the living environment of human beings. Researches show that the waste tire powder modified rubber asphalt has excellent road performance, can be used for road building technology, and is an ideal disposal mode for automobile waste tires. Therefore, the rubber powder prepared from waste tires is a high-value-added and environment-friendly technology for modifying the road asphalt, and the rubber asphalt has outstanding performances in the aspects of deformation resistance, ageing resistance, fatigue resistance, crack resistance, noise reduction and the like, and is accepted by the industry. However, for rubber asphalt, the waste rubber powder is an inert material and cannot be completely dissolved in asphalt, so that in order to ensure the excellent performance of the rubber asphalt, the blending of rubber and asphalt is promoted by adopting a catalytic technology or a pretreatment technology, which becomes a research direction for the production of the rubber asphalt. However, at present, the preference of the rubber powder on the adsorption of asphalt components and molecular groups is unclear according to the selection of the rubber powder on the adsorption of the asphalt components, and the further promotion of the rubber asphalt industry is restricted.
The rubber powder is relatively complex in composition and is composed of elastomers (natural rubber and synthetic rubber), vulcanizing agents (sulfur, peroxide, etc.), vulcanization activators (stearic acid, etc.), fillers, curing agents (carbon black), oil components, plasticizers and additives (antioxidants, antiozonants, etc.). The microstructure change in the rubber modified asphalt manufacturing process is quite complex, and the modification mechanism of the common rubber asphalt is generally considered to be mainly based on the swelling reaction of rubber powder particles and the absorption of light components of matrix asphalt without obvious chemical reaction. Therefore, after the rubber powder is added, the adsorption condition of the rubber powder on the asphalt component directly influences the effect of the modified asphalt, the preferential adsorption of the rubber powder on a certain component of the asphalt is obtained, and a targeted optimization measure can be provided for the performance improvement of the rubber modified asphalt.
Asphalt is a black-brown complex mixture composed of hydrocarbons with different molecular weights and non-metallic derivatives thereof, and is generally divided into four components, namely a saturated component, an aromatic component, colloid and asphaltene, in the field of road petroleum asphalt for convenience of analysis. Researches show that the proportion, the property and the performance of the four components of the asphalt are closely related to the performance of the asphalt pavement. The index and the change of the macroscopic physical property of the asphalt are the reflection and the external expression of the complex chemical composition, the molecular structure, the change and the interaction of the molecular structure of the asphalt.
The traditional method is generally used for analyzing four components of rubber asphalt by adopting a solvent precipitation and chromatographic column method (also called Corbett method), and the method comprises the steps of precipitating an asphalt sample by using n-heptane, refluxing and filtering the precipitate by using n-heptane to remove included soluble components, and refluxing and dissolving the precipitate by using toluene to obtain asphaltene; the deasphalted part is treated by an alumina chromatographic column and is sequentially eluted by solvents such as n-heptane, toluene/ethanol and the like to obtain saturated components, aromatic components and colloid. However, the Corbett method is slow in asphalt four-component testing speed, complex in experimental process, large in pollution, large in human influence factor and poor in data reproducibility.
A rod-shaped thin-layer chromatography-hydrogen flame ion separation analysis method includes diluting a soluble organic sample which is nonvolatile at normal temperature and can be burnt in flame with a solvent, dropping the diluted sample on a thin-layer rod coated with silica gel alumina for adsorption, removing the solvent, placing the sample in a corresponding expansion tank, and performing expansion separation under the environment condition of certain saturated vapor pressure. Compared with the traditional solvent precipitation and chromatographic column method, the method has the advantages of simple operation, high speed, accurate data, good reproducibility, less pollution and the like. The method is recommended in SY/T5119-2008 rock soluble organic matter and crude oil family component rod thin-layer flame ionization analysis method certified by the Chinese oil and gas industry standard, and SH/T0753-2005 lubricating oil base oil chemical family composition determination method certified by the national standard of the people's republic of China. Because the components of petroleum asphalt are relatively close to those of crude oil and lubricating oil, the technology can be adopted in the analysis of asphalt components.
The technique of permeation gel chromatography, based on the principle of size exclusion, separates according to the diameter size of dynamic movement of molecules. Generally, permeation gel chromatography can separate molecules of different sizes according to passage time. The shorter the passage time, the larger the molecular weight of the molecule, and conversely, the longer the passage time, the smaller the molecular weight. The technology is mature in the aspect of asphalt molecular weight separation, and the absorption preference of rubber powder on asphalt components can be explored from the aspect of molecular weight distribution.
At present, when the influence of rubber powder particles on asphalt components is researched and analyzed, the rubber powder particles are not filtered and removed, and the rubber powder and the asphalt are integrally tested. Because the rubber powder particles are insoluble, when the rubber powder particles are separated by adopting a traditional four-component method, the rubber powder particles are classified into aromatic components and colloid components, the selective absorption condition of the rubber powder to asphalt components cannot be reflected, and the adsorption preference of the rubber powder to the asphalt components is difficult to quantitatively reveal.
Disclosure of Invention
The invention aims to provide an evaluation method for selective adsorption of rubber powder on asphalt components and molecular groups, which is convenient to operate, accurate in data, good in reproducibility and less in pollution.
In order to solve the technical problems, the invention adopts the following technical scheme:
the method for evaluating the selective adsorption of rubber powder on asphalt components and molecular groups comprises the following steps of firstly, respectively heating original asphalt and rubber asphalt prepared from the original asphalt to a flowing state, pouring the heated original asphalt into superfine round-hole sieve pores for gravity filtration, collecting the sieved asphalt, and weighing the asphalt to be measured; then, separating the asphalt into four components of asphaltene, saturated components, aromatic components and colloid by using a rod-shaped thin-layer chromatography-hydrogen flame ion method, and calculating the proportion of the four components; then, respectively detecting and identifying the molecular weight of the asphalt by utilizing a gel permeation chromatography technology; and finally, quantitatively judging the adsorption degree of the rubber powder to the asphalt component according to the four components of the asphalt and the mass relation between the molecular weight change amplitude and the added rubber powder.
The rubber asphalt was prepared as follows: weighing 500g of original asphalt, placing the original asphalt in a container, heating the container to 160 ℃, selecting 20-80 meshes of rubber powder, weighing the rubber powder according to the mixing amount of 0-50%, adding the rubber powder into the asphalt, shearing the mixture at a high speed of 5000rpm for 60min, and swelling and developing the mixture for 30min to obtain the rubber asphalt.
Gravity filtration operates as follows: weighing 100g of original asphalt and rubber asphalt respectively, heating the original asphalt to 160 ℃, heating the rubber asphalt to 175 ℃, maintaining the temperature, and placing the two kinds of asphalt in 400-mesh superfine round hole sieve pores respectively to filter and elute the asphalt under natural gravity for 24 hours; collecting undersize asphalt, weighing to be tested, wherein the undersize of original asphalt is a control group, and the undersize of rubber asphalt is an experimental group;
the rod-shaped thin layer chromatography-hydrogen flame ionization method is operated as follows: 10mg of asphalt of a control group and an experimental group are respectively dissolved in 5mL of dichloromethane solution to prepare a test solution with the asphalt mass concentration of 20mg/mL, a microinjector is used for extracting L mu L of the test solution, the test solution is spotted at the original point of a silica gel chromatographic rod for 6 times, a rod-shaped thin layer chromatography-hydrogen flame ion detector is adopted to test and identify four components of the asphalt, the air flow is 1.0L/min during detection, and the hydrogen flow is 150 mL/min.
The gel permeation chromatography technology is utilized to respectively detect and identify the molecular weight of the asphalt and the operation is carried out as follows: respectively dissolving 10mg of asphalt of a control group and an experimental group into tetrahydrofuran for 24 hours to prepare test solutions with the concentration of 2mg/mL, calibrating a high performance liquid chromatograph by using polystyrene, and then sampling and testing 50 mu L of the solutions, wherein the test temperature is 40 ℃, the solution flow rate is 1.0mL/min, and the elution time is set to be 30min, so as to obtain the molecular weight distribution of the asphalt.
Analyzing the quality difference of the four components of the control group and the experimental group according to the formula (1), and sorting the preference degrees of the four components for selectively adsorbing the asphalt on the rubber particles according to the relative size of the component difference ratio;
the ratio of the difference between certain components is the ratio of certain components in the experimental group to certain components in the control group (1)
If the difference ratio of a certain component is less than 1, indicating that the rubber powder in the experimental group absorbs the asphalt component, and considering that the rubber powder has absorption preference on the component; according to the components of the experimental group and the control group, the preference and the ordering of the rubber powder to the asphalt components can be determined;
and secondly, if the difference ratio of a certain component is more than or equal to 1, the rubber powder in the experimental group does not absorb the asphalt component, and the rubber powder is considered to have no absorption preference on the component.
Analyzing the molecular weight difference between the control group and the experimental group according to the formula (2), and sorting the preference degrees of the rubber particles for selectively adsorbing asphalt molecular groups according to the relative size of the molecular weight difference ratio.
Molecular weight ratio of experimental group/control group (2)
If the difference ratio of certain molecular weight is less than 1, indicating that the rubber powder in the experimental group absorbs the asphalt in the molecular group, and considering that the rubber powder has absorption preference on the components in the molecular group; determining the absorption preference ordering of the rubber powder to the molecular group components according to the difference degree of the molecular weights of the experimental group and the control group;
if the molecular weight difference ratio is more than or equal to 1, indicating that the rubber powder in the experimental group does not absorb the asphalt molecular group, and considering that the rubber powder has no absorption preference on the molecular group component.
Aiming at the condition that the selective adsorption of rubber powder to each component of asphalt is difficult to accurately reveal in the conventional rubber asphalt preparation, the inventor establishes an evaluation method for the selective adsorption of rubber powder to asphalt components and molecular groups, firstly, the original asphalt and the rubber asphalt prepared by the original asphalt are respectively heated to a flowing state and poured into superfine round hole sieve pores for gravity filtration, and the asphalt under the sieve is collected and weighed to be tested; then, separating the asphalt into four components of asphaltene, saturated components, aromatic components and colloid by using a rod-shaped thin-layer chromatography-hydrogen flame ion method, and calculating the proportion of the four components; then, respectively detecting and identifying the molecular weight of the asphalt by utilizing a gel permeation chromatography technology; and finally, quantitatively judging the adsorption degree of the rubber powder to the asphalt component according to the four components of the asphalt and the mass relation between the molecular weight change amplitude and the added rubber powder. The method can deduct the interference of the rubber powder on the separation of the asphalt component after the rubber powder fully adsorbs the asphalt component, a rodlike thin-layer chromatography-hydrogen flame ion separation and permeable gel chromatography technology is adopted to accurately represent the change conditions of the rest asphalt component and molecular groups, the conditions of the absorption degree, the absorption preference and the like of the rubber powder on the asphalt component are quantitatively evaluated from the component scale and the molecular weight scale, a theoretical basis is provided for the macro rheological property of the rubber asphalt, the particle size and the mixing amount of the rubber powder in the modified asphalt can be reasonably optimized based on the absorption preference of the rubber powder, the method has important significance on the design, development and evaluation of the high-performance rubber asphalt, and the waste material is recycled in road engineering. In a word, the method has the advantages of high experimental precision, perfect maturity, simple operation, high speed, accurate data, good reproducibility and less pollution, and is suitable for being widely applied to rubber asphalt research.
In the invention, the asphalt after the rubber particles are filtered is tested, four components and molecular weight distribution characteristics of the asphalt after rubber adsorption are obtained based on a rodlike thin-layer chromatography-hydrogen flame ion separation and permeable gel chromatography method, and selective adsorption and adsorption preference ordering of rubber powder to asphalt components are obtained by mutual checking with original asphalt. The problems of low speed, complex experimental process, high pollution, large human influence factor and poor data reproducibility of the traditional four-component method are solved; meanwhile, the problem that rubber powder particles are not filtered and removed in the conventional rubber asphalt component analysis process, and when the rubber powder particles are separated by adopting a traditional four-component method, the rubber powder particles are insoluble and are often classified into aromatic components and colloid components, so that the actual distribution state of the asphalt components after being adsorbed is interfered. Therefore, the selective absorption of the asphalt component by the rubber powder cannot be reflected, and the problem of the adsorption preference of the rubber powder to the asphalt component is difficult to quantitatively reveal.
In addition, the inventor proposes that rubber asphalt is placed in a superfine round hole sieve pore for gravity filtration, rubber powder particles are removed, and the undersize asphalt is tested. After the rubber powder is ensured to fully adsorb the asphalt component, the interference of the rubber powder on the separation of the asphalt component is deducted, the change condition of the rest asphalt component is accurately represented, and the adsorption preference of the rubber powder on the asphalt component is evaluated according to the change condition.
Drawings
FIG. 1 is a flow chart of the method for evaluating the selective adsorption of rubber powder on asphalt components and molecular groups according to the present invention.
Detailed Description
FIG. 1 is a flow chart showing the method for evaluating the selective adsorption of the rubber crumb to the asphalt component and the molecular group according to the present invention, which is further described below with reference to the foregoing specific method in combination with examples.
Example 1
(1) Selecting No. 70 matrix asphalt sample, weighing 500g of original asphalt, placing the original asphalt in a container, heating to 160 ℃, selecting 20-mesh rubber powder (source A), adding the rubber powder into the asphalt by adopting 20% of mixing amount, shearing at high speed of 5000rpm for 60min, swelling and developing for 30min, and preparing the rubber asphalt;
(2) weighing 100g of original asphalt and rubber asphalt respectively, heating the original asphalt to 160 ℃, heating the rubber asphalt to 175 ℃, maintaining the temperature, respectively placing the two kinds of asphalt in superfine round hole sieve meshes (400 meshes, made of stainless steel materials), and filtering and eluting the asphalt under natural gravity for 24 hours to ensure that no free asphalt exists on the surfaces of rubber particles in an experimental group; collecting undersize asphalt, weighing to be tested, wherein the undersize of original asphalt is a control group, and the undersize of rubber asphalt is an experimental group;
(3) 10mg of control group asphalt and experimental group asphalt are respectively dissolved in 5mL of dichloromethane solution to prepare a test solution with the asphalt mass concentration of 20mg/mL, a microinjector is used for extracting L mu L of the test solution, the test solution is spotted at the original point of a silica gel chromatographic rod for 6 times, a rod-shaped thin layer chromatography-hydrogen flame ion detector (IATROSCAN MK-6s, Japan Yatelun) is used for testing and identifying four components of the asphalt, the air flow is 1.0L/min during detection, the hydrogen flow is 150mL/min, and four component data can be identified and analyzed according to self-contained software of equipment; the four-component results are shown in table 1.
TABLE 1 control and experimental asphalt four-component ratio
| Four components | Saturation fraction | Aromatic component | Glue | Asphaltenes |
| Control group/%) | 22 | 45.89 | 20.19 | 11.92 |
| Experimental group/%) | 17.48 | 49.32 | 18.38 | 14.82 |
(4) Respectively dissolving 10mg of asphalt of a control group and an experimental group into tetrahydrofuran for 24 hours to prepare test solutions with the concentration of 2mg/mL, calibrating a high performance liquid chromatograph by using polystyrene, then sampling and testing 50 mu L of the solutions, setting the test temperature to be 40 ℃, the solution flow rate to be 1.0mL/min and the elution time to be 30min, and obtaining a molecular weight statistical table of the asphalt according to software carried by equipment; the molecular groups of the asphalts are shown in table 2.
TABLE 2 control and experimental groups asphalt molecular weight ratio
| Molecular weight/mol | ＜2000 | 2000-4000 | 4000-6000 | 6000-8000 | 8000-10000 | ＞10000 |
| Control group/%) | 68.3 | 16.61 | 6.68 | 3.1 | 2.13 | 3.18 |
| Experimental group/%) | 67.41 | 16.77 | 6.58 | 3.27 | 1.92 | 4.05 |
(5) The control group and the experimental group were analyzed for the quality difference of the four components:
the difference ratio of a certain component among the four components of the asphalt was calculated according to the formula (1) as shown in Table 3.
TABLE 3 control and experimental groups of asphalt four-component difference ratio
| Four components | Saturation fraction | Aromatic component | Glue | Asphaltenes |
| Ratio of component difference/%) | 0.79 | 1.07 | 0.91 | 1.24 |
According to the above criteria, as shown in Table 3:
the difference ratio of the saturated components is 0.79 to less than 1, which indicates that the rubber powder in the experimental group absorbs the saturated components, and the rubber powder is considered to have absorption preference on the saturated components; the difference ratio of the rubber components is less than 0.91 and less than 1, which indicates that the rubber powder in the experimental group absorbs the rubber components, and the rubber powder is considered to have absorption preference on the rubber;
the difference ratio of the aromatic components is more than or equal to 1, which indicates that the rubber powder in the experimental group does not absorb the aromatic components, and the rubber powder can be considered to have no absorption preference on the aromatic components; the asphaltene difference ratio is 1.24 and more than or equal to 1, which indicates that the rubber powder in the experimental group does not absorb the asphaltene, and the rubber powder asphaltene can be considered as having no absorption preference.
(6) Further, the molecular weight difference between the control group and the experimental group was analyzed:
the ratio of difference in molecular weight of asphalt was calculated according to the formula (2) as shown in Table 4.
TABLE 4 ratio of difference in molecular weight between control and experimental groups
| Molecular weight/mol | ＜2000 | 2000-4000 | 4000-6000 | 6000-8000 | 8000-10000 | ＞10000 |
| Ratio of difference/%) | 0.98 | 1.01 | 0.99 | 1.05 | 0.90 | 1.27 |
According to the above criteria, as shown in Table 4:
when the molecular weight is less than 2000, 4000-6000 and 8000-10000, the difference ratio of the molecular weight is 0.98, 0.99 and 0.90 respectively, and the rubber powder is considered to have absorption preference to the components in the molecular groups;
when the molecular weight is in the range of 2000-4000, 6000-8000 and > 10000, the difference ratio of the molecular weight is 1.01, 1.05 and 1.27 respectively, and the rubber powder is considered to have no absorption preference to the components in the molecular groups;
(7) further, according to the relative size of the component difference ratio,
sorting (from small to large) component difference ratios: saturated fraction (0.79), gum (0.91)
② the molecular weight difference ratio ordering (from small to large): 8000-10000 molecular weight (0.90), < 2000 molecular weight (0.98), 4000-6000 molecular weight (0.99)
It can be known that the rubber powder has strong preference for the saturated component adsorption of asphalt, has inferior adsorption to colloid, and has no adsorption to aromatic component and asphaltene; the rubber powder has the strongest adsorption to components with molecular weight of 8000-10000, the second adsorption to components with molecular weight less than 2000, the second adsorption to molecular weight of 4000-6000 and no adsorption to other components with molecular weight.
Example 2
(1) Selecting No. 90 matrix asphalt sample, weighing 500g of original asphalt, placing the original asphalt in a container, heating to 160 ℃, selecting 40-mesh rubber powder (source B), adding the rubber powder into the asphalt by adopting 50% of mixing amount, shearing at high speed of 5000rpm for 60min, swelling and developing for 30min, and preparing the rubber asphalt;
(2) weighing 100g of original asphalt and rubber asphalt respectively, heating the original asphalt to 160 ℃, heating the rubber asphalt to 175 ℃, maintaining the temperature, and placing the two kinds of asphalt in 400-mesh superfine round hole sieve pores respectively for gravity filtration and elution for 24 hours to ensure that no free asphalt exists on the surfaces of the rubber particles in the experimental group; collecting undersize asphalt, weighing to be tested, wherein the undersize of original asphalt is a control group, and the undersize of rubber asphalt is an experimental group;
(3) respectively dissolving 10mg of asphalt of a control group and an experimental group in 5mL of dichloromethane solution to prepare a test solution with the asphalt mass concentration of 20mg/mL, extracting L mu L of the test solution by using a micro-injector, spotting the test solution to the original point of a silica gel chromatographic rod for 6 times, testing and identifying four components of the asphalt by using a rod-shaped thin-layer chromatography-hydrogen flame ion detector, wherein the air flow is 1.0L/min during detection, the hydrogen flow is 150mL/min, and the four-component data can be identified and analyzed by software carried by equipment; the four-component results are shown in table 5.
TABLE 5 control and experimental asphalt four-component ratio
| Four components | Saturation fraction | Aromatic component | Glue | Asphaltenes |
| Control group/%) | 19.5 | 49.3 | 18.4 | 12.8 |
| Experimental group/%) | 21.5 | 46.8 | 15.4 | 16.3 |
(4) Respectively dissolving 10mg of asphalt of a control group and an experimental group into tetrahydrofuran for 24 hours to prepare test solutions with the concentration of 2mg/mL, calibrating a high performance liquid chromatograph by using polystyrene, then sampling and testing 50 mu L of the solutions, setting the test temperature to be 40 ℃, the solution flow rate to be 1.0mL/min and the elution time to be 30min, and obtaining a molecular weight statistical table of the asphalt according to software carried by equipment; the molecular groups of the asphalts are shown in table 6.
TABLE 6 control and experimental asphalt molecular weight ratios
| Molecular weight/mol | ＜2000 | 2000-4000 | 4000-6000 | 6000-8000 | 8000-10000 | ＞10000 |
| Control group/%) | 70.4 | 16.21 | 6.54 | 3.03 | 1.51 | 2.31 |
| Experimental group/%) | 69.24 | 15.73 | 6.41 | 3.38 | 1.93 | 3.31 |
(5) The control group and the experimental group were analyzed for the quality difference of the four components:
the difference ratio of a certain component among the four components of the asphalt was calculated according to the formula (1) as shown in Table 7.
TABLE 7 control and experimental groups of asphalt four-component difference ratio
| Four components | Saturation fraction | Aromatic component | Glue | Asphaltenes |
| Ratio of component difference/%) | 1.10 | 0.95 | 0.83 | 1.27 |
According to the above criteria, as shown in Table 7:
the difference ratio of the components of the aromatic component is less than 0.95, which indicates that the rubber powder in the experimental group absorbs the aromatic component, and the rubber powder is considered to have absorption preference on the aromatic component; the difference ratio of the rubber components is less than 0.83 and less than 1, which indicates that the rubber powder in the experimental group absorbs the rubber components, and the rubber powder is considered to have absorption preference on the rubber;
the saturation component difference ratio is more than or equal to 1, which indicates that the rubber powder in the experimental group does not absorb the saturation component, and the rubber powder can be considered to have no absorption preference on the saturation component; the asphaltene difference ratio is 1.27 or more than 1, which indicates that the rubber powder in the experimental group does not absorb the asphaltene, and the rubber powder asphaltene is considered to have no absorption preference.
(6) Further, the molecular weight difference between the control group and the experimental group was analyzed:
the ratio of difference in molecular weight of asphalt was calculated according to the formula (2) as shown in Table 8.
TABLE 8 ratio of difference in molecular weight between control and experimental groups
| Molecular weight/mol | ＜2000 | 2000-4000 | 4000-6000 | 6000-8000 | 8000-10000 | ＞10000 |
| Ratio of difference/%) | 0.99 | 0.97 | 0.98 | 1.12 | 1.28 | 1.43 |
According to the above criteria, as shown in Table 8:
when the molecular weight is less than 2000, the molecular weight difference ratio is 0.99, 0.97 and 0.98 respectively in the ranges of 2000-4000 and 4000-6000, and the rubber powder is considered to have absorption preference on the components in the molecular groups;
when the molecular weight is in the ranges of 6000-8000, 8000-10000 and more than 10000, the difference ratio of the molecular weight is 1.12, 1.28 and 1.43 respectively, and the rubber powder is considered to have no absorption preference to the components in the molecular groups;
(7) further, according to the relative sizes of the component difference ratio and the molecular weight,
sorting (from small to large) component difference ratios: gum (0.83), fragrance (0.95),
② the molecular weight difference ratio ordering (from small to large): 2000-4000 molecular weight (0.97), 4000-6000 molecular weight (0.98) and < 2000 molecular weight (0.99)
Therefore, the rubber powder has strong preference for colloid adsorption of asphalt, adsorbs aromatic components less frequently, and does not adsorb saturated components and asphaltene; the rubber powder has the strongest adsorption to the components with the molecular weight of 2000-4000, the second adsorption to the components with the molecular weight of 4000-6000, the second adsorption to the molecular weight of less than 2000 and no adsorption to other molecular weight components.
Comparative test
The four-component and molecular weight results obtained using the process of the invention (example 3) and the conventional process (comparative) are compared below.
(1) Example 3
The same procedure as in examples 1 and 2 was followed, except that the sample of the base asphalt in step (1) was No. 50 and the rubber crumb was 60 mesh (source C). The results of using the pitch four-component difference ratio and the molecular weight difference ratio of the present invention are shown in tables 9 and 10:
TABLE 9 Difference ratio of four Components of asphalt of the present invention
| Four components | Saturation fraction | Aromatic component | Glue | Asphaltenes |
| Ratio of component difference/%) | 1.16 | 0.98 | 0.88 | 1.31 |
According to the above criteria, as shown in Table 9:
the difference ratio of the components of the aromatic component is 0.99 to less than 1, which indicates that the rubber powder in the experimental group absorbs the aromatic component, and the rubber powder is considered to have absorption preference on the aromatic component; the difference ratio of the rubber components is less than 0.88 and less than 1, which indicates that the rubber powder in the experimental group absorbs the rubber components, and the rubber powder is considered to have absorption preference on the rubber;
the saturation component difference ratio is more than or equal to 1, which indicates that the rubber powder in the experimental group does not absorb the saturation component, and the rubber powder can be considered to have no absorption preference on the saturation component; the asphaltene difference ratio is 1.31 and more than or equal to 1, which indicates that the rubber powder in the experimental group does not absorb the asphaltene, and the rubber powder asphaltene can be considered as having no absorption preference.
Further, the molecular weight difference between the control group and the experimental group was analyzed:
TABLE 10 ratio of difference in molecular weight between control and experimental groups
| Molecular weight/mol | ＜2000 | 2000-4000 | 4000-6000 | 6000-8000 | 8000-10000 | ＞10000 |
| Ratio of difference/%) | 1.05 | 1.15 | 0.94 | 0.91 | 0.96 | 1.25 |
According to the above criteria, as shown in Table 10:
when the molecular weight is in the range of 4000-6000, 6000-8000 and 8000-10000, the difference ratio of the molecular weight is 0.94, 0.91 and 0.96 respectively, and the rubber powder is considered to have absorption preference to the components in the molecular groups;
when the molecular weight is less than 2000, 2000 plus 4000 and more than 10000, the difference ratio of the molecular weight is 1.05, 1.15 and 1.25 respectively, and the rubber powder is considered to have no absorption preference to the components in the molecular group;
further, according to the relative size of the component difference ratio,
sorting (from small to large) component difference ratios: gum (0.88), fragrance (0.95),
② the molecular weight difference ratio ordering (from small to large): 6000-8000 molecular weight (0.91), 4000-6000 molecular weight (0.94).
Therefore, the rubber powder has strong preference for colloid adsorption of asphalt, adsorbs aromatic components less frequently, and does not adsorb saturated components and asphaltene; the rubber powder has the strongest adsorption to the components with the molecular weight of 6000-8000, the second time to the components with the molecular weight of 4000-6000, and no adsorption to other components with the molecular weight.
(2) Comparative example
The four-component and molecular weight test analyses of the as-received asphalt and the rubberized asphalt were carried out according to the conventional method using the same asphalt material as in example 3, and the results are shown in tables 11 and 12.
TABLE 11 bitumen four component ratio example
| Four components | Saturation fraction | Aromatic component | Glue | Asphaltenes |
| As-is bitumen/% | 17.5 | 48.7 | 19.8 | 14 |
| Rubber asphalt/% | 25.8 | 42.7 | 11.8 | 19.7 |
| Difference/%) | 8.3 | -6 | -8 | 5.7 |
TABLE 12 molecular weight ratio of asphalt
| Molecular weight/mol | ＜2000 | 2000-4000 | 4000-6000 | 6000-8000 | 8000-10000 | ＞10000 |
| As-is bitumen/% | 65.4 | 15.8 | 7.3 | 3.15 | 1.66 | 6.69 |
| Rubber asphalt/% | 63.5 | 14.8 | 5.1 | 6.5 | 2.1 | 8 |
| Difference/%) | -1.9 | -1 | -2.2 | 3.35 | 0.44 | 1.31 |
It is known that only the difference in composition and the difference in molecular weight of rubber asphalt from as-received asphalt can be obtained from the conventional method. However, since the four components and the molecular weight ratio of the asphalt are relative proportions, the sum of the four component proportions and the molecular weight ratio is 100%. The rubber powder particles are insoluble and are often classified into aromatic components and colloid components, which interfere with the distribution state of the asphalt components after adsorption. The four components and the molecular weight proportion obtained in the traditional method all contain the proportion of rubber particles in the asphalt. The composition or molecular weight of the rubber particles therefore already interferes with the corresponding proportions in the bitumen, from which the selective adsorption of the rubber powder to bitumen components and molecular groups cannot be derived.
In conclusion, the invention eliminates the influence of rubber particles after the rubber powder adsorbs the asphalt, and can accurately obtain the variation of asphalt components and molecular weight after the rubber adsorption, thereby evaluating the selective adsorption of the rubber powder on the asphalt components and molecular groups.
Claims (7)
1. A method for evaluating the selective adsorption of rubber powder to asphalt components and molecular groups is characterized by comprising the following steps: firstly, respectively heating original asphalt and rubber asphalt prepared from the original asphalt to a flowing state, pouring the heated original asphalt into superfine round-hole sieve pores for gravity filtration, collecting the sieved asphalt, and weighing the asphalt to be measured; then, separating the asphalt into four components of asphaltene, saturated components, aromatic components and colloid by using a rod-shaped thin-layer chromatography-hydrogen flame ion method, and calculating the proportion of the four components; then, respectively detecting and identifying the molecular weight of the asphalt by utilizing a gel permeation chromatography technology; and finally, quantitatively judging the adsorption degree of the rubber powder to the asphalt component according to the four components of the asphalt and the mass relation between the molecular weight change amplitude and the added rubber powder.
2. The evaluation method according to claim 1, characterized in that the rubberized asphalt is prepared as follows: weighing 500g of original asphalt, placing the original asphalt in a container, heating the container to 160 ℃, selecting 20-80 meshes of rubber powder, weighing the rubber powder according to the mixing amount of 0-50%, adding the rubber powder into the asphalt, shearing the mixture at a high speed of 5000rpm for 60min, and swelling and developing the mixture for 30min to obtain the rubber asphalt.
3. The evaluation method according to claim 1, characterized in that the gravity filtration operates as follows: weighing 100g of original asphalt and rubber asphalt respectively, heating the original asphalt to 160 ℃, heating the rubber asphalt to 175 ℃, maintaining the temperature, and placing the two kinds of asphalt in 400-mesh superfine round hole sieve pores respectively to filter and elute the asphalt under natural gravity for 24 hours; and collecting undersize asphalt to be weighed, wherein the undersize of the original asphalt is a control group, and the undersize of the rubber asphalt is an experimental group.
4. The evaluation method according to claim 3, wherein the rod-shaped thin layer chromatography-hydrogen flame ionization method is operated as follows: 10mg of asphalt of a control group and an experimental group are respectively dissolved in 5mL of dichloromethane solution to prepare a test solution with the asphalt mass concentration of 20mg/mL, a microinjector is used for extracting L mu L of the test solution, the test solution is spotted at the original point of a silica gel chromatographic rod for 6 times, a rod-shaped thin layer chromatography-hydrogen flame ion detector is adopted to test and identify four components of the asphalt, the air flow is 1.0L/min during detection, and the hydrogen flow is 150 mL/min.
5. The evaluation method according to claim 3, wherein the detection and identification of the molecular weight of the asphalt by the gel permeation chromatography technique are performed as follows: respectively dissolving 10mg of asphalt of a control group and an experimental group into tetrahydrofuran for 24 hours to prepare test solutions with the concentration of 2mg/mL, calibrating a high performance liquid chromatograph by using polystyrene, and then sampling and testing 50 mu L of the solutions, wherein the test temperature is 40 ℃, the solution flow rate is 1.0mL/min, and the elution time is set to be 30min, so as to obtain the molecular weight distribution of the asphalt.
6. The evaluation method according to claim 1, wherein the control group and the test group are analyzed for the quality difference of the four components according to the formula (1), and the preference of the four components for selectively adsorbing the asphalt to the rubber particles is ranked according to the relative magnitude of the ratio of the component differences;
the ratio of the difference between the components is equal to the ratio of the components in the experimental group to the ratio of the components in the control group (1).
7. The evaluation method according to claim 1, wherein the difference in molecular weight between the control group and the experimental group is analyzed according to the formula (2), and the preference of the rubber particles for selectively adsorbing the asphalt molecular groups is ranked according to the relative magnitude of the ratio of the molecular weight difference.
The ratio of molecular weight difference was one molecular weight ratio of experimental group/one molecular weight ratio of control group (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010844263.6A CN112098581A (en) | 2020-08-20 | 2020-08-20 | Evaluation method for selective adsorption of rubber powder on asphalt components and molecular groups |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010844263.6A CN112098581A (en) | 2020-08-20 | 2020-08-20 | Evaluation method for selective adsorption of rubber powder on asphalt components and molecular groups |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112098581A true CN112098581A (en) | 2020-12-18 |
Family
ID=73752684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010844263.6A Pending CN112098581A (en) | 2020-08-20 | 2020-08-20 | Evaluation method for selective adsorption of rubber powder on asphalt components and molecular groups |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112098581A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115436216A (en) * | 2022-08-31 | 2022-12-06 | 北京工业大学 | Method for testing selective adsorption of minerals on asphalt components |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004109090A (en) * | 2002-09-20 | 2004-04-08 | Cosmo Oil Co Ltd | Analysis method of asphalt |
| CN105176115A (en) * | 2015-10-14 | 2015-12-23 | 辽宁省交通科学研究院 | SBS-rubber powder composite modified asphalt and preparation method thereof |
-
2020
- 2020-08-20 CN CN202010844263.6A patent/CN112098581A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004109090A (en) * | 2002-09-20 | 2004-04-08 | Cosmo Oil Co Ltd | Analysis method of asphalt |
| CN105176115A (en) * | 2015-10-14 | 2015-12-23 | 辽宁省交通科学研究院 | SBS-rubber powder composite modified asphalt and preparation method thereof |
Non-Patent Citations (9)
| Title |
|---|
| 吴才轩: "基于化学组成对掺加Sasobit温拌橡胶沥青降粘机理的研究" * |
| 夏娟 等: "胶粉预处理方式对SBS/橡胶粉复合改性沥青性能的影响", 《石油沥青》 * |
| 施沈越 等: "基于凝胶渗透色谱技术的沥青老化研究进展", 《石油沥青》 * |
| 李波;李鹏;张新雨;曹贵;杨小龙;: "废旧胶粉的反应与交联作用对橡胶沥青黏度的影响" * |
| 李静 等: "基于涂层活化的橡胶粉改性沥青制备及性能试验研究" * |
| 李静 等: "基于涂层活化的橡胶粉改性沥青制备及性能试验研究", 《硅酸盐通报》 * |
| 谢昭彬 等: "橡胶沥青性能评价指标和影响因素研究", 《公路交通科技(应用技术版)》 * |
| 高莉宁 等: "高效凝胶渗透色谱法测定聚合物改性沥青和道路回收沥青中的改性剂含量" * |
| 高莉宁 等: "高效凝胶渗透色谱法测定聚合物改性沥青和道路回收沥青中的改性剂含量", 《中外公路》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115436216A (en) * | 2022-08-31 | 2022-12-06 | 北京工业大学 | Method for testing selective adsorption of minerals on asphalt components |
| CN115436216B (en) * | 2022-08-31 | 2024-05-14 | 北京工业大学 | Method for testing selective adsorption of mineral on asphalt component |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hui et al. | Characteristics, source apportionment and contribution of VOCs to ozone formation in Wuhan, Central China | |
| Li et al. | Characterizations of volatile organic compounds (VOCs) from vehicular emissions at roadside environment: The first comprehensive study in Northwestern China | |
| Simayi et al. | Understanding the sources and spatiotemporal characteristics of VOCs in the Chengdu Plain, China, through measurement and emission inventory | |
| Wakeham et al. | Polycyclic aromatic hydrocarbons in recent lake sediments—I. Compounds having anthropogenic origins | |
| Hailin et al. | Long-term monitoring and source apportionment of PM2. 5/PM10 in Beijing, China | |
| Tsai et al. | Volatile organic compounds from the exhaust of light-duty diesel vehicles | |
| Tang et al. | Atmospheric behaviors of particulate-bound polycyclic aromatic hydrocarbons and nitropolycyclic aromatic hydrocarbons in Beijing, China from 2004 to 2010 | |
| Chiang et al. | Pollutant constituents of exhaust emitted from light-duty diesel vehicles | |
| Buczyńska et al. | Stable carbon isotopic ratio measurement of polycyclic aromatic hydrocarbons as a tool for source identification and apportionment—A review of analytical methodologies | |
| Krupadam et al. | Highly sensitive determination of polycyclic aromatic hydrocarbons in ambient air dust by gas chromatography-mass spectrometry after molecularly imprinted polymer extraction | |
| Lü et al. | Carbonyl compounds in the ambient air of hazy days and clear days in Guangzhou, China | |
| Wang et al. | Polycyclic aromatic hydrocarbons and heavy metals in urban environments: Concentrations and joint risks in surface soils with diverse land uses | |
| Kim et al. | Seasonal characteristics of the gaseous and particulate PAHs at a roadside station in Seoul, Korea | |
| Huang et al. | Characteristics, source analysis and chemical reactivity of ambient VOCs in a heavily polluted city of central China | |
| CN112098581A (en) | Evaluation method for selective adsorption of rubber powder on asphalt components and molecular groups | |
| Kang et al. | An analysis of the temporal variability in volatile organic compounds (VOCs) within megacity Seoul and an identification of their sources | |
| Rönkkö et al. | Air quality intervention during the Nanjing youth olympic games altered PM sources, chemical composition, and toxicological responses | |
| CN112684042A (en) | Method for simultaneously purifying various semi-volatile organic pollutants in soil analysis process | |
| Jookjantra et al. | Formation potential and source contribution of secondary organic aerosol from volatile organic compounds | |
| CN112630419B (en) | Method for judging asphalt aging degree in asphalt mixture | |
| Sugiyama et al. | Measurement of ambient PAHs in Kumamoto: Differentiating local and transboundary air pollution | |
| Kong et al. | Subway construction activity influence on polycyclic aromatic hydrocarbons in fine particles: Comparison with a background mountainous site | |
| Li et al. | Storm impacts upon the composition of organic matrices in Nagara River—A study based on molecular weight and activated carbon adsorbability | |
| Liu et al. | Characteristics and sources of volatile organic compounds during summertime in Tai'an, China | |
| Lim et al. | Characteristics of airborne PM 1.0 and associated chemical constituents at a roadside area in Korea |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201218 |
|
| RJ01 | Rejection of invention patent application after publication |