CN107560954A - The sealing self-healing effect testing method of mist containing sand with shape-memory properties - Google Patents
The sealing self-healing effect testing method of mist containing sand with shape-memory properties Download PDFInfo
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- CN107560954A CN107560954A CN201710767469.1A CN201710767469A CN107560954A CN 107560954 A CN107560954 A CN 107560954A CN 201710767469 A CN201710767469 A CN 201710767469A CN 107560954 A CN107560954 A CN 107560954A
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Abstract
The present invention provides a kind of sealing self-healing effect testing method of mist containing sand with shape-memory properties, solves the problems, such as to lack the sealing material self-healing effect testing method of mist containing sand at present, belongs to durability of asphalt pavement technical field.The present invention is first according to certain formula and prepares the sealing material of mist containing sand with shape-memory properties, will contain sand mist sealing material injection dumb-bell shape silicon rubber mould, and will be stripped after cooling and tensile test specimen is made；Then pre-embossed two seams at left and right sides of test specimen, then tension test is carried out until crack occurs in whole section to test specimen using pitch direct tensile test instrument；Test specimen heating will be gone out and carry out self-healing, crack self-healing situation is investigated using ESEM and energy disperse spectroscopy；Finally to the test specimen repeat pull after healing, the sealing material self-healing effect of mist containing sand is evaluated with fracture strength ratio twice, shape memory fiber and thermoplastic granulates the optimum mix amount are determined, so as to provide a kind of effective method evaluation sealing material self-healing effect of mist containing sand directly perceived.
Description
Technical field
The present invention is a kind of sealing self-healing effect testing method of mist containing sand with shape-memory properties, belongs to asphalt road
Face durability technical field.
Background technology
Just there is scholar to be found that asphalt has a self-healing feature early in the sixties in 19th century, subsequent asphalt material from
The extensive concern of the healing properties research person that receives road work, the self-healing performance of asphalt material are applied to more and more
In laying of roadway and preventive maintenance.Researchers want to the formation mechenism by understanding asphalt material self-healing
And influence factor, the self-healing performance of suitable method lifting asphalt material is found, to resist its fatigue cracking, extends asphalt road
The service life in face.But due to asphalt material and its physics complicated and changeable and chemical characteristic, its self-healing effect is difficult to be ground
The persons of studying carefully understand and quantified that this results in road work, and person is difficult to performance and the life-span of Accurate Prediction bituminous paving, and effectively changes
Kind bituminous paving self-healing performance.
Therefore, the research to asphalt material self-healing effect seems increasingly urgent, and in recent years, domestic and international researcher is attempted
Self-healing influential effect factor and characterizing method of a variety of methods to various asphalt materials are tested and studied.There is scholar to lead to
Constant strain torsional shear fatigue test is crossed, have studied fatigue of the mineral powder granular size to pitch, polymer modified asphalt rubber cement
With the influence of freezing crack pattern；There is scholar to use the self-healing during dissipated energy theory quantitative assessment asphalt material load week,
Confirm influence of the intermittent phase during load week to pitch fatigue life and ultimate bearing capacity；Some scholars pass through glass marble
Between the tension test that is drawn out of asphalt film, simulate asphalt membrane and attach to the situation gathered materials, by the ultrasound for penetrating test specimen
Wave measurement conversion defines pitch self-healing rate.Also scholar uses dynamic shear rheometer, chooses different pitches rubber cement as research pair
As using the decay of asphalt mastic complex shear modulus and recovery extent as self-healing evaluation index, on the basis of fatigue test, entering
Row fatigue-healing-testing fatigue again, compare the self-healing performance of asphalt mastic.
Another someone uses dynamic shear rheometer, and the self-healing ability of several different modified asphalts is compared, ground
On the basis of studying carefully, suitable self-healing and index are used for modular ratio and CYCLIC LOADING number.These result of the tests provide not
With the self-healing phenomenon of material, self-healing Indexes of Evaluation Effect or the factor for influenceing self-healing effect, but it is disadvantageous in that
These experiments are influenceed by various complicated factors, including self-healing time, self-healing temperature, failure stage etc., and these are tried
Test and carried out mostly by testing fatigue, it is very time-consuming and complicated.In addition, the research object collection of most researcher's self-healing effects
In on pitch, asphalt and asphalt mastic, not being suitable for evaluating the sealing of mist containing sand so includes the slurry of fine aggregate
Material, studied currently without the self-healing effect testing method to the sealing material of mist containing sand.It can be seen that contain, it is necessary to research and develop one kind
The method of testing of sand mist sealing self-healing effect, so as to evaluate the sealing material self-healing effect of mist containing sand, propose that one kind is more suitable for
The method for testing the self-healing performance of the sealing material of mist containing sand.
The content of the invention
(1) technical problem
It is an object of the present invention to provide a kind of sealing self-healing effect testing method of mist containing sand with shape-memory properties, from
And solve to lack the sealing material self-healing effect testing method of mist containing sand at present, similar approach is more complicated, cumbersome, experiment
The problem of time-consuming, test result GRR difference.
(2) technical scheme
In order to solve the problems, such as to lack at present the sealing material self-healing effect testing method of mist containing sand, the present invention provides a kind of
The sealing self-healing effect testing method of mist containing sand with shape-memory properties, so as to evaluate tool in a kind of simple and effective method
There is the self-healing effect of the sealing material of mist containing sand of shape-memory properties.Technical solution of the present invention is as follows：First, according to necessarily matching somebody with somebody
Side prepares the sealing material of mist containing sand with shape-memory properties；Then, the freshly prepd sealing material of mist containing sand is injected into dumbbell
Shape silicon rubber mould, the tensile test specimen that material is made in the demoulding is stood after emulsified asphalt demulsification；Surface is reserved at left and right sides of test specimen
Two depth 1mm seams, then tension test is carried out to test specimen using pitch direct tensile test instrument, produced using fluorescence microscope
When life runs through whole section crack, stop stretching, test specimen, which is reentered into mould, carries out heating healing；Using ESEM and
EDS energy disperse spectroscopies are observed and test self-healing test specimen, and shape memory fiber and thermoplastic granulates are in agglutination in investigation test specimen
Situation of change；Finally, to the test specimen repeat pull after healing, with fracture strength again and the ratio of initial breaking strength
As the self-healing capability of the evaluation sealing material of mist containing sand, that compares different shape memory fiber and thermoplastic granulates volume contains sand
The shape-memory properties of mist sealing material, determine shape memory fiber and thermoplastic granulates the optimum mix amount.
(3) beneficial effect
As road work person deepens continuously to asphalt material self-healing performance study, increasing technology and material
Need to improve performance and durability by strengthening the self-healing performance of pitch, for example sealing of mist containing sand etc is preventative
Maintenance technology.This self-healing effect testing method just to asphalt material proposes higher requirement.It is provided by the invention to have
The sealing self-healing effect testing method of mist containing sand of shape-memory properties, can be with a kind of simple effective method to the sealing of mist containing sand
Self-healing effect tested, greatly save carry out fatigue test required for plenty of time, and filled up mist containing sand seal
Blank in terms of layer material self-healing effect testing method.
According to patented technology provided by the invention, a kind of sealing self-healing of mist containing sand with shape-memory properties can be proposed
The method of testing of effect is closed, intuitively and effectively the self-healing effect to mist sealing material quantitatively evaluating can be carried out, simplify in the past
Need the plenty of time to carry out the method for testing of fatigue test, saved plenty of time and energy, there is good economic benefit；For
The research and development sealing of mist containing sand is laid a good foundation with its self-healing performance is evaluated, this preventative using the sealing of mist containing sand for bituminous paving
Maintenance technology provides theoretical foundation, has higher application value.
Embodiment
The present invention provides a kind of sealing self-healing effect testing method of mist containing sand with shape-memory properties, specific implementation
Step is as follows：
(1) the shape memory chopped fiber and thermoplastic granulates that preferably phase transition temperature matches with road table maximum temperature field,
Wherein fiber unloads three stages pre- shape as reinforcement material, and by high temperature loading stretching, the constant cooling of holding load, room temperature
Become, assign fiber shape memory function；
(2) at normal temperatures according to a certain ratio using modified emulsifying asphalt, the shape memory fiber of predeformation, thermoplasticity
Grain, maximum particle diameter are that 1.18mm basalt fine aggregate and water prepare the sealing material of mist containing sand with self-healing function；
(3) sealing material of mist containing sand is injected into 50 DEG C of preheated long 100mm, wide 20mm, deep 6mm dumb-bell shape silicon rubber
In mould, after standing pitch demulsification to be emulsified in 24 hours, sample is put and is stripped after cooling down 30min to refrigerator, test specimen is put into 0 DEG C
Direct tensile test instrument temperature chamber in preserve 2 hours；
(4) intermediate symmetrical position respectively carves one of deep preset slot of 1mm at left and right sides of sample, and 3 are incubated in 0 DEG C of environmental cabinet
Hour, tested using direct tensile test instrument at 0 DEG C, draw speed 100mm/min, microscope is used in drawing process
Observation, until the crackle through whole section occur in the other two sides of test specimen, record test specimen stress and strain；
(5) test specimen that will appear from crackle is put into the baking oven consistent with road table maximum temperature and conserved 1 hour, makes pre- deformation
Shape memory chopped fiber and thermoplastic granulates give full play to self-healing, using ESEM and energy spectrometer analysis crack self-healing
Conjunction situation；
(6) sample after self-healing is reentered into 0 DEG C of temperature chamber 3 hours, repeat step (4) tension test is until examination
Part is broken, and records the stress and strain of test specimen, with this fracture strength and the initial breaking strength of unstretched healing test specimen
Ratio evaluates the self-healing effect of the sealing material of mist containing sand, and compares containing for different shape memory fiber and thermoplastic granulates volume
Sand mist sealing material self-healing effect, determines its optimum mix amount.
Claims (1)
- A kind of 1. sealing self-healing effect testing method of mist containing sand of shape-memory properties, it is characterised in that the specific step of this method It is rapid as follows：(1) the shape memory chopped fiber and thermoplastic granulates that preferably phase transition temperature matches with road table maximum temperature field, wherein Fiber unloads the pre- deformation of three stages as reinforcement material, and by high temperature loading stretching, the constant cooling of holding load, room temperature, assigns Give fiber shape memory function；(2) at normal temperatures according to a certain ratio using modified emulsifying asphalt, the shape memory fiber of predeformation, thermoplastic granulates, most Big particle diameter is that 1.18mm basalt fine aggregate and water prepare the sealing material of mist containing sand with self-healing function；(3) sealing material of mist containing sand is injected into 50 DEG C of preheated long 100mm, wide 20mm, deep 6mm dumb-bell shape silicon rubber mould In, after standing pitch to be emulsified demulsification in 24 hours, sample is put and is stripped after cooling down 30min to refrigerator, test specimen is put into 0 DEG C straight Connect in Tensile Tester temperature chamber and preserve 2 hours；(4) in the crack of sample each side pre-embossed one of 1mm length, using pitch direct tensile test instrument to sample at 0 DEG C Lower carry out tension test, draw speed 100mm/min, with micro- sem observation in drawing process, until test specimen upper and lower surface goes out Now run through the crackle of whole section, record the stress and strain of now test specimen；(5) test specimen that will appear from crackle is put into the baking oven consistent with road table maximum temperature and conserved 1 hour, makes the shape of pre- deformation Memory chopped fiber and thermoplastic granulates give full play to self-healing, using ESEM and energy spectrometer analysis crack self-healing feelings Condition；(6) sample after self-healing is reentered into 0 DEG C of temperature chamber 2 hours, repeat step (4) tension test is until test specimen breaks Split, record the stress and strain of test specimen, with this fracture strength and the ratio of the initial breaking strength of unstretched healing test specimen The self-healing effect of the sealing material of mist containing sand is evaluated, and compares the mist containing sand of different shape memory fiber and thermoplastic granulates volume Sealing material self-healing effect, determines its optimum mix amount.
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| CN201710767469.1A CN107560954B (en) | 2017-08-25 | 2017-08-25 | Method for testing self-healing effect of sand-containing fog sealing layer with shape memory performance |
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| CN201710767469.1A CN107560954B (en) | 2017-08-25 | 2017-08-25 | Method for testing self-healing effect of sand-containing fog sealing layer with shape memory performance |
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| CN107560954B CN107560954B (en) | 2020-03-13 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108375657A (en) * | 2018-03-21 | 2018-08-07 | 广东电网有限责任公司电力科学研究院 | A kind of Plural Evaluation Methods of self-healing material |
| CN108613993A (en) * | 2018-05-11 | 2018-10-02 | 交通运输部公路科学研究所 | A kind of the self-healing capability evaluation method and system of asphalt |
| CN111196733A (en) * | 2020-01-09 | 2020-05-26 | 青岛理工大学 | Oxidation induced shape memory fiber and preparation method and application thereof |
| CN111982712A (en) * | 2020-08-19 | 2020-11-24 | 南京林业大学 | Evaluation method for self-healing performance of shape memory gutta-percha modified asphalt |
| CN113433304A (en) * | 2021-06-24 | 2021-09-24 | 哈尔滨工业大学 | Method for testing and evaluating self-healing performance of asphalt |
| CN113789695A (en) * | 2021-10-21 | 2021-12-14 | 安徽建筑大学 | Material composition design method for microwave heating self-healing pavement in frozen soil area |
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| CN106337349A (en) * | 2016-09-14 | 2017-01-18 | 南京林业大学 | Method for self-repairing shape memory effect based joint sealant for concrete pavement through two steps |
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| CN206143560U (en) * | 2016-11-02 | 2017-05-03 | 山西省交通科学研究院 | Bituminous paving with self -diagnosis and self -repairing function |
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| CN106426903A (en) * | 2016-09-06 | 2017-02-22 | 南京林业大学 | Pre-deformation method capable of endowing cement pavement calking material with shape memory function |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108375657A (en) * | 2018-03-21 | 2018-08-07 | 广东电网有限责任公司电力科学研究院 | A kind of Plural Evaluation Methods of self-healing material |
| CN108613993A (en) * | 2018-05-11 | 2018-10-02 | 交通运输部公路科学研究所 | A kind of the self-healing capability evaluation method and system of asphalt |
| CN108613993B (en) * | 2018-05-11 | 2021-05-25 | 交通运输部公路科学研究所 | Self-healing capability evaluation method and system for asphalt mixture |
| CN111196733A (en) * | 2020-01-09 | 2020-05-26 | 青岛理工大学 | Oxidation induced shape memory fiber and preparation method and application thereof |
| CN111982712A (en) * | 2020-08-19 | 2020-11-24 | 南京林业大学 | Evaluation method for self-healing performance of shape memory gutta-percha modified asphalt |
| CN113433304A (en) * | 2021-06-24 | 2021-09-24 | 哈尔滨工业大学 | Method for testing and evaluating self-healing performance of asphalt |
| CN113433304B (en) * | 2021-06-24 | 2022-03-29 | 哈尔滨工业大学 | Method for testing and evaluating self-healing performance of asphalt |
| CN113789695A (en) * | 2021-10-21 | 2021-12-14 | 安徽建筑大学 | Material composition design method for microwave heating self-healing pavement in frozen soil area |
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| CN107560954B (en) | 2020-03-13 |
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Application publication date: 20180109 Assignee: Hefei Shuang Dao run Highway Engineering Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2020320000369 Denomination of invention: Test method for self healing effect of sand fog seal with shape memory property Granted publication date: 20200313 License type: Common License Record date: 20201212 Application publication date: 20180109 Assignee: Zhenjiang Heng An Civil Technology Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2020320000365 Denomination of invention: Test method for self healing effect of sand fog seal with shape memory property Granted publication date: 20200313 License type: Common License Record date: 20201212 Application publication date: 20180109 Assignee: BEIJING JIUTONGQU TESTING TECHNOLOGY Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2020320000364 Denomination of invention: Test method for self healing effect of sand fog seal with shape memory property Granted publication date: 20200313 License type: Common License Record date: 20201212 |
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