CN102879272A - Method for evaluating damage self-healing capacity of asphalt mortar - Google Patents
Method for evaluating damage self-healing capacity of asphalt mortar Download PDFInfo
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- CN102879272A CN102879272A CN2012103718151A CN201210371815A CN102879272A CN 102879272 A CN102879272 A CN 102879272A CN 2012103718151 A CN2012103718151 A CN 2012103718151A CN 201210371815 A CN201210371815 A CN 201210371815A CN 102879272 A CN102879272 A CN 102879272A
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- 230000006378 damage Effects 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 23
- 239000010426 asphalt Substances 0.000 title abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 89
- 238000011156 evaluation Methods 0.000 claims description 12
- 238000004364 calculation method Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 13
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000011384 asphalt concrete Substances 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 206010011376 Crepitations Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention relates to a method for evaluating the damage self-healing capacity of asphalt mortar. The method includes stretching an asphalt mortar test piece in two directions at constant temperature under the condition that the strain rate is equal; monitoring stress and displacement data in a stretching and self-healing process in real time; and analyzing the data via a computer to obtain a self-healing coefficient of the asphalt mortar test piece. The method has the advantages that the self-healing capacity of the asphalt mortar can be quantitatively evaluated, influence of different factors such as self-healing time, self-healing temperature, self-healing pressure and asphalt damage degree before self-healing on self-healing effects of asphalt materials can also be tested, the method can be applied to asphalt mortar materials with different proportions, is simple and feasible, operation is easy, and a guiding foundation for optimally selecting and optimally designing materials of sustainable asphalt pavements is laid.
Description
Technical field
The invention belongs to the applied technical field that the bituminous mortar rheological characteristics is estimated, be specifically related to a kind of method of estimating bituminous mortar damage self-healing capability.
Background technology
Along with the fast development of China's expressway construction cause, we constantly increase the demand of pavement construction material, and the requirement of material property is improved constantly.Meanwhile, the destruction problem of China Higher level asphalt highway manifests day by day.Road is in long-term use procedure, and asphalt concrete structure under the impact of complex environment, produces small cracking and local damage around unavoidablely.Can reduce the serviceable life of the lighter's pavement structure, and the safety of severe one total all can be jeopardized.Therefore, the subject matter of related work person care is exactly crackle and the damage of how to repair timely and effectively appearance.Many fine cracks split etc. such as matrix crack, and are of common occurrence in the pavement engineering structure that reality is used.Yet, because the limitation of existing Detection Techniques, the damage of these microcosmic scopes very likely out in the cold and survey less than, to such an extent as to the realization of the idea that crackle and damage are repaired becomes very difficult, even may.But, if these crackles or damage can not be repaired and be processed timely and effectively, not only can affect normal usage energy and the serviceable life of asphalt concrete structure, but also might cause macroscopic fracture and cause structural brittle fracture, finally produce serious catastrophic failure.
Therefore for asphalt roads, it is good in self-healing ability to guarantee that ground surface material and structure have, energy active, the crackle and the damage location that automatically bituminous pavement are occurred are repaired, and reduction road management operation cost, prolongation Road Service Life are all had great importance.
At present, most people is estimated the self-healing property of pitch mainly by the variation (modulus, phasing degree etc.) of asphalt performance before and after dynamic shear rheometer (DSR) test relatively intermittently, with the variation at modulus before and after intermittently or phasing degree as the self-healing property evaluation index.Although the method can be estimated the self-healing performance of pitch to a certain extent, but, evaluation procedure is loaded down with trivial details, to having relatively high expectations of operation, test apparatus is expensive in addition, and the method applicable object also only is limited to single asphalt material, and awaits further to study for the self-healing property evaluation method after pitch and the combination of gathering materials.
To sum up, how can study by an easy method self-healing ability of asphalt material, and not need expensive complicated equipment, be the problem of our road worker facing.
Summary of the invention
The object of the invention is to overcome prior art medium pitch and the existing deficiency of self-healing property evaluation method of gathering materials, provide a kind of evaluation method simple, can estimate the method for damage self-healing capability of the bituminous mortar compound of different proportionings.
The technical scheme of technical solution problem of the present invention may further comprise the steps:
(1) treats test block 35～50 ℃ of preheatings 3～6 hours;
(2) setting draft temperature is 35～50 ℃, treats the rate of strain two-way stretches such as test block carries out, and draw speed is 2mm/min, gathers stress value and the strain value of initial time, draws incipient extension damage modulus E
0, continuation stretching and Real-time Collection act on stress value and the strain value on the test specimen to be measured, until tensile damage modulus E
tWith E
0Ratio n
0Reach 0.3～0.6, stop to stretch;
(3) to applying the constant pressure in opposite directions of 0.1MPa on the test specimen to be measured two ends after step (2) stretching, test specimen to be measured carries out self-healing, and the self-healing temperature is identical with draft temperature, and keeping the self-healing time is to stop to exert pressure after 2～4 hours;
(4) to rate of strain two-way stretches such as the test specimen to be measured after step (3) self-healing carry out again, the stretching of repeating step (2) is to tensile damage modulus E
t' and E
0' ratio n
tWith n
0Equate, stop to stretch;
(5) calculate the front tensile damage modulus speed K of self-healing
0With self-healing after stretching damage modulus speed K
1, drawing the self-healing temperature and be T ℃, self-healing time is the self-healing coefficient HC of the h hour test specimen to be measured under the condition
n(T, h), its computing method are as follows:
Wherein, T is the self-healing temperature, ℃;
H is the self-healing time, hour;
K
0Be the stretch modulus damage rate before the test specimen self-healing,
E
0Be the damage of the incipient extension before test specimen self-healing modulus, MPa;
E
tBe the termination tensile damage modulus before the test specimen self-healing, MPa, E
t=n
0E
0, n
0Be 0.3～0.6;
T damages modulus to stopping tensile damage used time of modulus, s by incipient extension before the test specimen self-healing;
K
1Be the stretch modulus damage rate after the test specimen self-healing,
E
0' be the incipient extension damage modulus after the test specimen self-healing, MPa;
E
t' be the termination tensile damage modulus after the test specimen self-healing, MPa, E '
t=n
tE '
0, n
t=n
0
T' damages modulus to stopping tensile damage used time of modulus, s by incipient extension after the test specimen self-healing.
Setting draft temperature in above-mentioned steps (2) is 40 ℃, treats the rate of strain two-way stretches such as test block carries out, and draw speed is 2mm/min, gathers the stress and strain value of initial time, draws incipient extension damage modulus E
0, continuation stretching and Real-time Collection act on the stress and strain value on the test specimen to be measured, until tensile damage modulus E
tWith E
0Ratio n
0Reach 0.4, stop to stretch; Test specimen to be measured two ends after step (2) stretching are applied the constant pressure in opposite directions of 0.1MPa in step (3), test specimen to be measured carries out self-healing, and the self-healing temperature is identical with draft temperature, and keeping the self-healing time is to stop to exert pressure after 3 hours.
Gathering the stress value and the strain value that act on the test specimen to be measured in above-mentioned steps (2) and the step (4) is equally spaced 3 the corresponding stress values of time point of per second and strain value.
The method of evaluation bituminous mortar provided by the invention damage self-healing capability by under constant temperature to rate of strain two-way stretches such as the bituminous mortar test specimen carry out, and the stress and displacement data in Real-Time Monitoring stretching and the self-healing process, draw the self-healing coefficient of bituminous mortar test specimen by Computer Analysis, the present invention can estimate the self-healing ability of bituminous mortar quantitatively, can also test out the different self-healing time, the self-healing temperature, the factors such as the front pitch degree of injury of self-healing pressure and self-healing are on the impact of asphalt material self-healing action, can be applicable to the asphalt mortar material of different proportionings, and the method is simple and feasible, easy operating is preferably laid a good foundation with optimal design for further instructing the material of sustainable bituminous pavement.
Embodiment
Now by specific embodiment the present invention is further specified, but the present invention is not limited only to following embodiment.
Embodiment 1
Take diameter as 30mm, highly be example as the right cylinder of 50mm as bituminous mortar test specimen to be measured, its self-healing property evaluation method may further comprise the steps:
(1) with test specimen to be measured 40 ℃ of preheating 5 hours in constant temperature oven; Test specimen to be measured is that diameter is 30mm, highly is the bituminous mortar right cylinder of 50mm, and its preparation method is static pressure method with reference to forming method by T0704-1993 bitumen mixture specimen method for making among the JTJ052-2000 " highway engineering pitch and Asphalt Mixture Experiment rules ".
(2) setting draft temperature is 40 ℃, treats the rate of strain two-way stretches such as test block carries out, and draw speed is 2mm/min, gathers the stress value σ of initial time
0With strain value ε
0, draw incipient extension damage modulus E
0, continuation stretching and Real-time Collection act on the stress value σ on the test specimen to be measured
tWith strain value ε
t, until the tensile damage modulus E of t after second
tWith E
0Ratio n
0Reach 0.4, stop to stretch;
(3) the test specimen to be measured two ends after step (2) is stretched apply the constant pressure in opposite directions of 0.1MPa simultaneously, test specimen self-healing to be measured, and the self-healing temperature is identical with draft temperature, and the maintenance self-healing time is to stop to exert pressure after 3 hours;
(4) to rate of strain two-way stretches such as the test specimen to be measured after step (3) self-healing carry out again, the stretching of repeating step (2) is to the tensile damage modulus E of t' after second
t' and E
0' ratio n
tWith n
0Equate, stop to stretch;
(5) calculate the front tensile damage modulus speed K of self-healing
0With self-healing after stretching damage modulus speed K
1, drawing the self-healing temperature and be 40 ℃, self-healing time is the self-healing coefficient HC of 3 hours test specimens to be measured under the condition
n(T, h), its computing formula is as follows:
Wherein, T is the self-healing temperature, ℃;
H is the self-healing time, hour;
K
0Be the stretch modulus damage rate before the test specimen self-healing,
E
0Be the damage of the incipient extension before test specimen self-healing modulus, MPa;
E
tBe the termination tensile damage modulus before the test specimen self-healing, MPa, E
t=n
0E
0
T damages modulus to stopping tensile damage used time of modulus, s by incipient extension before the test specimen self-healing;
K
1Be the stretch modulus damage rate after the test specimen self-healing,
E
0' be the incipient extension damage modulus after the test specimen self-healing, MPa;
E
t' be the termination tensile damage modulus after the test specimen self-healing, MPa E '
t=n
tE '
0, n
t=n
0
T' damages modulus to stopping tensile damage used time of modulus, s by incipient extension after the test specimen self-healing.
Above-mentioned tensile damage modulus E
0, E
t, E
0', E
t' draw by following formula:
σ
iBe the stress value of test specimen on the i moment point;
ε
iBe the strain value of test specimen on the i moment point.
In step (2) and step (4), for stress value σ corresponding to equally spaced 3 time points of stress value and the collection per second of strain value
iWith strain value ε
i, and calculate the tensile damage modulus value E of test specimen
i
Embodiment 2
Take diameter as 30mm, highly be example as the right cylinder of 50mm as bituminous mortar test specimen to be measured, its self-healing property evaluation method may further comprise the steps:
(1) with test specimen to be measured 35 ℃ of preheating 6 hours in constant temperature oven; Identical among test specimen to be measured and the embodiment 1.
(2) setting draft temperature is 35 ℃, treats the rate of strain two-way stretches such as test block carries out, and draw speed is 2mm/min, gathers the stress value σ of initial time
0With strain value ε
0, draw incipient extension damage modulus E
0, continuation stretching and Real-time Collection act on the stress value σ on the test specimen to be measured
tWith strain value ε
t, until the tensile damage modulus E of t after second
tWith E
0Ratio n
0Reach 0.3, stop to stretch;
(3) the test specimen to be measured two ends after step (2) is stretched apply the constant pressure in opposite directions of 0.1MPa simultaneously, test specimen self-healing to be measured, and the self-healing temperature is identical with draft temperature, and the maintenance self-healing time is to stop to exert pressure after 4 hours;
(4) to rate of strain two-way stretches such as the test specimen to be measured after step (3) self-healing carry out again, the stretching of repeating step (2) is to the tensile damage modulus E of t' after second
t' and E
0' ratio n
tWith n
0Equate, stop to stretch;
(5) calculate the front tensile damage modulus speed K of self-healing
0With self-healing after stretching damage modulus speed K
1, other operation is identical with embodiment 1, and drawing the self-healing temperature and be 35 ℃, self-healing time is the self-healing coefficient HC of 4 hours test specimens to be measured under the condition
n(T, h).
Embodiment 3
Take diameter as 30mm, highly be example as the right cylinder of 50mm as bituminous mortar test specimen to be measured, its self-healing property evaluation method may further comprise the steps:
(1) with test specimen to be measured 50 ℃ of preheating 3 hours in constant temperature oven; Identical among test specimen to be measured and the embodiment 1.
(2) setting draft temperature is 50 ℃, treats the rate of strain two-way stretches such as test block carries out, and draw speed is 2mm/min, gathers the stress value σ of initial time
0With strain value ε
0, draw incipient extension damage modulus E
0, continuation stretching and Real-time Collection act on the stress value σ on the test specimen to be measured
tWith strain value ε
t, until the tensile damage modulus E of t after second
tWith E
0Ratio n
0Reach 0.6, stop to stretch;
(3) the test specimen to be measured two ends after step (2) is stretched apply the constant pressure in opposite directions of 0.1MPa simultaneously, test specimen self-healing to be measured, and the self-healing temperature is identical with draft temperature, and the maintenance self-healing time is to stop to exert pressure after 2 hours;
(4) to rate of strain two-way stretches such as the test specimen to be measured after step (3) self-healing carry out again, the stretching of repeating step (2) is to the tensile damage modulus E of t' after second
t' and E
0' ratio n
tWith n
0Equate, stop to stretch;
(5) calculate the front tensile damage modulus speed K of self-healing
0With self-healing after stretching damage modulus speed K
1, other operation is identical with embodiment 1, and drawing the self-healing temperature and be 50 ℃, self-healing time is the self-healing coefficient HC of 2 hours test specimens to be measured under the condition
n(T, h).
The adaptability to changes unilateral stretching that waits in above-described embodiment 1～3 can realize by means of common tension and compression frame, test specimen is fixed on the tension and compression frame, act on pulling force or pressure size and the draw speed on the test specimen and detect in real time pulling strengrth by control tension and compression frame, and then calculate the self-healing property of test specimen.
Evaluation method provided by the invention can be used for the bituminous mortar test specimen of different proportionings, can adopt the front pitch degree of injury of different self-healing time, self-healing temperature, self-healing pressure and self-healing according to concrete needs simultaneously, study each factor to the impact of asphalt material self-healing action.
Claims (3)
1. estimate the method that bituminous mortar damages self-healing capability for one kind, it is characterized in that may further comprise the steps:
(1) treats test block 35～50 ℃ of preheatings 3～6 hours;
(2) setting draft temperature is 35～50 ℃, treats the rate of strain two-way stretches such as test block carries out, and draw speed is 2mm/min, gathers stress value and the strain value of initial time, draws incipient extension damage modulus E
0, continuation stretching and Real-time Collection act on stress value and the strain value on the test specimen to be measured, until tensile damage modulus E
tWith E
0Ratio n
0Reach 0.3～0.6, stop to stretch;
(3) to applying the constant pressure in opposite directions of 0.1MPa on the test specimen to be measured two ends after step (2) stretching, test specimen to be measured carries out self-healing, and the self-healing temperature is identical with draft temperature, and keeping the self-healing time is to stop to exert pressure after 2～4 hours;
(4) to rate of strain two-way stretches such as the test specimen to be measured after step (3) self-healing carry out again, the stretching of repeating step (2) is to tensile damage modulus E
t' with E
0' ratio n
tWith n
0Equate, stop to stretch;
(5) calculate the front tensile damage modulus speed K of self-healing
0With self-healing after stretching damage modulus speed K
1, drawing the self-healing temperature and be T ℃, self-healing time is the self-healing coefficient HC of the h hour test specimen to be measured under the condition
n(T, h), its computing method are as follows:
Wherein, T is the self-healing temperature, ℃;
H is the self-healing time, hour;
K
0Be the stretch modulus damage rate before the test specimen self-healing,
E
0Be the damage of the incipient extension before test specimen self-healing modulus, MPa;
E
tBe the termination tensile damage modulus before the test specimen self-healing, MPa, E
t=n
0E
0, n
0Be 0.3～0.6;
T damages modulus to stopping tensile damage used time of modulus, s by incipient extension before the test specimen self-healing;
K
1Be the stretch modulus damage rate after the test specimen self-healing,
E
0' be the incipient extension damage modulus after the test specimen self-healing, MPa;
E
t' be the termination tensile damage modulus after the test specimen self-healing, MPa, E '
t=n
tE '
0, n
t=n
0
T' damages modulus to stopping tensile damage used time of modulus, s by incipient extension after the test specimen self-healing.
2. evaluation bituminous mortar according to claim 1 damages the method for self-healing capability, it is characterized in that: setting draft temperature in step (2) is 40 ℃, treat the rate of strain two-way stretches such as test block carries out, draw speed is 2mm/min, gather the stress and strain value of initial time, draw incipient extension damage modulus E
0, continuation stretching and Real-time Collection act on the stress and strain value on the test specimen to be measured, until tensile damage modulus E
tWith E
0Ratio n
0Reach 0.4, stop to stretch; Test specimen to be measured two ends after step (2) stretching are applied the constant pressure in opposite directions of 0.1MPa in step (3), test specimen to be measured carries out self-healing, and the self-healing temperature is identical with draft temperature, and keeping the self-healing time is to stop to exert pressure after 3 hours.
3. evaluation bituminous mortar according to claim 1 damages the method for self-healing capability, it is characterized in that: gathering the stress value and the strain value that act on the test specimen to be measured in described step (2) and the step (4) is equally spaced 3 the corresponding stress values of time point of per second and strain value.
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|---|---|---|---|
| CN201210371815.1A CN102879272B (en) | 2012-09-29 | 2012-09-29 | Method for evaluating damage self-healing capacity of asphalt mortar |
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|---|---|---|---|
| CN201210371815.1A CN102879272B (en) | 2012-09-29 | 2012-09-29 | Method for evaluating damage self-healing capacity of asphalt mortar |
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| Publication Number | Publication Date |
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| CN102879272B CN102879272B (en) | 2014-09-24 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713783A (en) * | 2015-04-09 | 2015-06-17 | 东南大学 | Method for detecting self-healing intensity of asphalt |
| CN105300801A (en) * | 2014-08-02 | 2016-02-03 | 同济大学 | Evaluation method of self-repairing effect of self-repairing cement-based material |
| CN105606451A (en) * | 2016-01-05 | 2016-05-25 | 同济大学 | Evaluation method for self-repair healing effect of cement-based material cracks |
| CN105758765A (en) * | 2016-03-01 | 2016-07-13 | 武汉理工大学 | Test and calculation method for optimum self-healing temperature and shortest self-healing time of asphalt |
| CN107576783A (en) * | 2017-08-25 | 2018-01-12 | 南京林业大学 | A kind of asphalt mastic shape-memory properties method of testing |
| 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 |
| CN109541192A (en) * | 2018-12-27 | 2019-03-29 | 北京工业大学 | A kind of evaluation method of road asphalt self-healing behavioral trait |
| CN109613221A (en) * | 2018-12-27 | 2019-04-12 | 北京工业大学 | A kind of test method of test road asphalt damage self-healing performance |
| CN111551457A (en) * | 2020-05-18 | 2020-08-18 | 合肥工业大学 | Method for testing and evaluating asphalt healing performance |
| CN112194773A (en) * | 2020-10-13 | 2021-01-08 | 长安大学 | Dynamic diselenide bond polyester elastomer material and preparation method and application thereof |
| CN114354403A (en) * | 2021-12-27 | 2022-04-15 | 哈尔滨工业大学 | Method for testing and evaluating self-healing performance of graphene microcapsule asphalt mortar under double-mechanism action |
| CN114486580A (en) * | 2021-12-27 | 2022-05-13 | 哈尔滨工业大学 | Graphene microcapsule asphalt self-healing test evaluation method |
| CN114878795A (en) * | 2022-05-31 | 2022-08-09 | 北京工业大学 | Method and device for evaluating self-healing capacity of asphalt damage based on energetics |
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| CN105300801A (en) * | 2014-08-02 | 2016-02-03 | 同济大学 | Evaluation method of self-repairing effect of self-repairing cement-based material |
| CN104713783A (en) * | 2015-04-09 | 2015-06-17 | 东南大学 | Method for detecting self-healing intensity of asphalt |
| CN104713783B (en) * | 2015-04-09 | 2017-06-23 | 东南大学 | A kind of method for detecting pitch self-healing intensity |
| CN105606451A (en) * | 2016-01-05 | 2016-05-25 | 同济大学 | Evaluation method for self-repair healing effect of cement-based material cracks |
| CN105758765A (en) * | 2016-03-01 | 2016-07-13 | 武汉理工大学 | Test and calculation method for optimum self-healing temperature and shortest self-healing time of asphalt |
| CN107576783A (en) * | 2017-08-25 | 2018-01-12 | 南京林业大学 | A kind of asphalt mastic shape-memory properties method of testing |
| CN107576783B (en) * | 2017-08-25 | 2020-03-13 | 南京林业大学 | Asphalt cement shape memory performance testing method |
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| CN109613221A (en) * | 2018-12-27 | 2019-04-12 | 北京工业大学 | A kind of test method of test road asphalt damage self-healing performance |
| CN109541192A (en) * | 2018-12-27 | 2019-03-29 | 北京工业大学 | A kind of evaluation method of road asphalt self-healing behavioral trait |
| CN111551457A (en) * | 2020-05-18 | 2020-08-18 | 合肥工业大学 | Method for testing and evaluating asphalt healing performance |
| CN111551457B (en) * | 2020-05-18 | 2023-02-28 | 合肥工业大学 | Method for testing and evaluating asphalt healing performance |
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| CN114354403A (en) * | 2021-12-27 | 2022-04-15 | 哈尔滨工业大学 | Method for testing and evaluating self-healing performance of graphene microcapsule asphalt mortar under double-mechanism action |
| CN114486580A (en) * | 2021-12-27 | 2022-05-13 | 哈尔滨工业大学 | Graphene microcapsule asphalt self-healing test evaluation method |
| CN114354403B (en) * | 2021-12-27 | 2022-09-02 | 哈尔滨工业大学 | Method for testing and evaluating self-healing performance of graphene microcapsule asphalt mortar under double-machine mechanism |
| CN114878795A (en) * | 2022-05-31 | 2022-08-09 | 北京工业大学 | Method and device for evaluating self-healing capacity of asphalt damage based on energetics |
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