CN106680113A - Method for evaluating pavement aging situation by adopting interlayer shear test - Google Patents
Method for evaluating pavement aging situation by adopting interlayer shear test Download PDFInfo
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- CN106680113A CN106680113A CN201710031120.1A CN201710031120A CN106680113A CN 106680113 A CN106680113 A CN 106680113A CN 201710031120 A CN201710031120 A CN 201710031120A CN 106680113 A CN106680113 A CN 106680113A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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Abstract
The invention discloses a method for evaluating a pavement aging situation by adopting an interlayer shear test. The method comprises the following steps: drilling and sampling an on-site pavement, and sampling pavement core samples of road segments which are in different service years and do not suffer from diseases yet and road segments which are in corresponding service years and suffer from the diseases; carrying out the interlayer shear test between upper layers and middle layers of the core samples of the road segments which do not suffer from the diseases yet, and drawing an anti-shear performance aging curve graph related to data obtained through the interlayer shear test according to the data; carrying out the interlayer shear test between upper layers and middle layers of the core samples of the road segments which suffer from the diseases, carrying out disease boundary condition processing on obtained data and graphs, and defining a disease boundary condition of the pavement; carrying out conjoint analysis, and commonly evaluating the aging situation of the whole road segment. According to the method disclosed by the invention, the conjoint analysis method adopting the disease boundary condition and aging curves is firstly put forward for determining the aging situation of the pavement core samples, and all analysis results are defined according to detection data of the interlayer shear test; compared with other methods, the method has higher applicability.
Description
Technical field
The invention belongs to technical field of buildings, and in particular to a kind of employing interlayer shear experimental evaluation road surface aging conditions
Method.
Background technology
Bituminous paving is due to unique semi-flexible characteristic so as under aging and special environment disease easily occur.Its
In one of topmost Damage Types be rut.With regard to the origin cause of formation of rut, current research thinks that this is due primarily to Colophonium material
Material softening in high temperature environments and shearing strength at intersection cut what the interaction of the factors such as the decay of performance was produced.
It is an important road quality index that shearing strength at intersection cuts performance, and which characterizes road surface and is resisting the energy of shearing strength between layers
The size of power.Interlayer shear experiment is the normal experiment that a kind of shearing strength at intersection of Research on Asphalt Mixture cuts performance, this experiment survey
The shear strength of examination interlayer is to characterize the bonding force between the different layers of road surface, while being also used for characterizing its compound itself
Shear strength.This test has multiple choices in the selection of object of study type, and the selection of object of study of the present invention is logical
Cross detection road surface to fetch the cutting performance of core sample to evaluate the aging conditions on road surface, so as to probe into the diverse location and difference of disease
The rule of the Interlaminar shear strengths of the core sample in military service time.Although carrying out much grinding for shearing strength at intersection shear force both at home and abroad
Study carefully, also once carried out the test of the shearing strength at intersection shear force of different size and different experiments method, but tested using interlayer shear
To be not yet suggested by detecting that method of the cutting performance of core sample to evaluate road surface aging conditions is fetched on road surface.
The content of the invention
Present invention aim at the method for providing a kind of employing interlayer shear experimental evaluation road surface aging conditions.The invention
Method is not only simple to operate, scientific and effective, can also obtain its interlayer by the exact test to live core sample shearing strength between layers
The attenuation of anti-shear performance, so as to accurately evaluate its road surface aging conditions.
For achieving the above object, the present invention is as follows using technical scheme：
Using the method for interlayer shear experimental evaluation road surface aging conditions, comprise the following steps：
To live road surface core boring sampling, the different Years Of Services of collection not yet produce disease section and phase Years Of Service Required disease
The road surface core sample in evil section；
The core sample that different Years Of Services are not yet produced with disease section carries out the interlayer shear between upper layer and middle surface layer
Test, makes its related anti-shear performance aging curve figure according to the data obtained by test；The related shear resistant
Energy aging curve figure includes shearing strength at intersection shearing stress figure, maximum strain figure and shear stress-strain curve figure；Shear strength is strong
Degree is lower, and maximum strain is bigger, load-deformation curve is more precipitous, represent it is aging more serious, otherwise it is then aging slight；
The interlayer shear-strength test between upper layer and middle surface layer is carried out to the road surface core sample in phase Years Of Service Required disease section,
The data for obtaining and chart are carried out into disease boundary condition treatment, the disease boundary condition of the road section surface is defined；The border
Condition is that average interlayer shear strength, average maximum strain and the shear stress-strain in phase Years Of Service Required disease section are bent
Line slope；Average interlayer shear strength is bigger, and average maximum strain is less, and load-deformation curve is got over closer to S types are then aging
Slightly, it is otherwise then aging serious；
Above-mentioned different Years Of Services are not yet produced into the related anti-shear performance aging curve figure in disease section and phase
The disease boundary condition in Years Of Service Required disease section carries out conjoint analysis, the common aging conditions for evaluating whole piece section.
By such scheme, it is the section on same highway to be measured that the different Years Of Services not yet produce disease section,
Temporal span was half a year to 1 year.
By such scheme, the road surface core sample in the phase Years Of Service Required disease section is the core of diverse location at disease section
Sample, including non-rut, the core sample at rut and curb.
By such scheme, the interlayer shear-strength test is comprised the following steps：
1) core sample and mould are incubated in the environment of 10 DEG C, temperature retention time is at least 5h；
2) the Marshall stability analyzer rate of climb is set for 50mm/min, and level-off；
3) it is placed on Marshall stability analyzer platform at once after take out the mould of good heat insulation, while taking out a core
Sample, fixes in being put into mould；
4) Marshall Test is carried out according to Marshall Test code requirement, and unloaded after this core sample off-test immediately
Sample, and mould is moved back to into couveuse continuation insulation；
5) machine is adjusted, record data carries out the experiment of next core sample.
Compared with prior art, the invention has the beneficial effects as follows：
The present invention is tested from the formation mechenism direction of disease based on interlayer, and the angle for cutting performance from shearing strength at intersection is satisfied the need
Face performance is evaluated.
Proposed using the method for disease boundary condition and aging curve conjoint analysis first to determine the old of road surface core sample
Change situation, and all analysis results all according to interlayer experiment detection data and define, it is compared with additive method, higher according to having
The suitability.
Additive method is compared, required time is shorter, in hgher efficiency, and specific aim is higher.
Description of the drawings
Fig. 1：The different core sample shearing strength at intersection shearing stress variation diagrams being on active service under the time；
Fig. 2：The different core sample interlayer maximum strain variation diagrams being on active service under the time；
Fig. 3：The different core sample interlayer maximum strain variation diagrams being on active service under the time；
Fig. 4：Opsition dependent distinguishes the shear strength meansigma methodss scatterplot comparison diagram of core sample；
Fig. 5：Opsition dependent distinguishes the maximum strain meansigma methodss scatterplot comparison diagram of core sample；
Fig. 6：1st group of core sample shearing strength at intersection shearing stress-strain curve comparison diagram；
Fig. 7：2nd group of core sample shearing strength at intersection shearing stress-strain curve comparison diagram；
Fig. 8：3rd group of core sample shearing strength at intersection shearing stress-strain curve comparison diagram；
Fig. 9：4th group of core sample shearing strength at intersection shearing stress-strain curve comparison diagram；
Figure 10：5th group of core sample shearing strength at intersection shearing stress-strain curve comparison diagram；
Figure 11：6th group of core sample shearing strength at intersection shearing stress-strain curve comparison diagram；
Figure 12：Different years core sample shearing strength at intersection shearing stress and boundary condition relative analyses figure；
Figure 13：The sample interlayer maximum strain of different years core and boundary condition relative analyses figure.
Specific embodiment
Following examples further explain technical scheme, but not as limiting the scope of the invention.
A kind of method of employing interlayer shear experimental evaluation road surface of the invention aging conditions, comprises the following steps that：
To live road surface core boring sampling, the different Years Of Services of collection not yet produce disease section and phase Years Of Service Required disease
The road surface core sample in evil section；
The core sample that different Years Of Services are not yet produced with disease section carries out the interlayer shear between upper layer and middle surface layer
Test, makes its related anti-shear performance aging curve figure according to the data obtained by test；The related shear resistant
Energy aging curve figure includes shearing strength at intersection shearing stress figure, maximum strain figure and shear stress-strain curve figure；Shear strength is strong
Degree is lower, and maximum strain is bigger, load-deformation curve is more precipitous, represent it is aging more serious, otherwise it is then aging slight；
The interlayer shear-strength test between upper layer and middle surface layer is carried out to the road surface core sample in phase Years Of Service Required disease section,
The data for obtaining and chart are carried out into disease boundary condition treatment, the disease boundary condition of the road section surface is defined；The border
Condition is that average interlayer shear strength, average maximum strain and the shear stress-strain in phase Years Of Service Required disease section are bent
Line slope；Average interlayer shear strength is bigger, and average maximum strain is less, and load-deformation curve is got over closer to S types are then aging
Slightly, it is otherwise then aging serious；
Above-mentioned different Years Of Services are not yet produced into the related anti-shear performance aging curve figure in disease section and phase
The disease boundary condition in Years Of Service Required disease section carries out conjoint analysis, the common aging conditions for evaluating whole piece section.
Interlayer shear-strength test process of the present invention is as follows：
1) core sample and mould are incubated in the environment of 10 DEG C, temperature retention time is at least 5h；
2) the Marshall stability analyzer rate of climb is set for 50mm/min, and level-off；
3) it is placed on Marshall stability analyzer platform at once after take out the mould of good heat insulation, while taking out a core
Sample, fixes in being put into mould；
4) Marshall Test is carried out according to Marshall Test code requirement, and unloaded after this core sample off-test immediately
Sample, and mould is moved back to into couveuse continuation insulation；
5) machine is adjusted, record data carries out the experiment of next core sample.
To live road surface core boring sampling, fetch its different Years Of Service and not yet produce disease section and identical Years Of Service
The road surface core sample of disease section diverse location, it is concrete such as table 1 and table 2.
Table 1 distinguishes core sample table by the different times of being on active service
| Numbering | The milling time | It is on active service the time | Core sample number |
| 1 | 2011 | 4 | 8 |
| 2 | 2012 | 3 | 8 |
| 3 | 2013 | 2 | 8 |
| 4 | 2014 | 1 | 8 |
| 5 | 2015 | 0 | 8 |
Table 2 distinguishes core sample table by the diverse location of disease
Different Years Of Services to fetching not yet produce the core sample in disease section and carry out interlayer shear-strength test, according to test institute
The related data for obtaining makes the aging curve figure of its related anti-shear performance, as shown in Figure 1, Figure 2, Figure 3 shows.
Interlayer shear experiment is carried out to the core sample at the phase Years Of Service Required different diseases fetched, by the data for obtaining and
Chart carries out disease boundary condition treatment, define boundary condition such as Fig. 4 of the road section surface disease, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9,
Shown in Figure 10, Figure 11.
First analyze aging curve, according to Fig. 1, Fig. 2 variation diagram understand core sample shear strength and maximum strain with
The increase in time of being on active service is tapered into, that is, suffer from a certain degree of decay, this surface shear strength of road surface interlayer and
Relation between maximum strain and the degree of aging on road surface.
According to Fig. 3, with the increase in time of being on active service, slope of a curve intensity of variation is gradually lowered, this surface roadways it is soft
Property be on active service the time passage gradually lose.Simultaneously according to Fig. 4, from scatterplot, we can see that at rut
The shear strength meansigma methodss of core sample are minimum, and this explanation material herein is weathered；Disease boundary condition is defined again, by meter
Calculate, in this research section, the average interlayer shear strength of non-rut, rut and curb for 2508MPa, 2446MPa and
2423MPa, this is boundary condition one.
According to Fig. 5, as maximum strain can also be used as Rule of judgment, maximum strain is demonstrated by material in shear history
Toughness, maximum strain is bigger, and material property is better, non-rigid closer to semi-rigid material, and the core sample at rut is most
Less than the core sample at non-rut and at curb, this maximum strain for also demonstrating disease road surface is also boundary condition, is obtained for big strain
To boundary condition two.
1-6 groups core sample shearing strength at intersection shearing stress-strain curve comparison diagram according to Fig. 6,7,8,9,10,11, due to drip
Blue or green road surface is a kind of semirigid material, with certain flexibility, is embodied on the load-deformation curve of interlayer shear, and curve should
Serpentine or reversed S-shape are presented, and the shear stress-strain curve of rigid material is typically presented straight line.The car in six groups of curve charts
Curve at rut is often presented straight line, and this shows at rut, and the degree of aging of this asphalt material is very high, rather than rut and road
Situation at shoulder is then slightly good, and it is also one of border to judge whether semirigid property is lost, and obtains boundary condition three.
Finally combine aging curve and boundary condition relative analyses, according to Figure 12 and Figure 13, the core sample being on active service 4 years
Shearing strength at intersection cut in performance all with disease at core sample be close to.Comprehensive shear strength, maximum stress and load-deformation curve it is oblique
Rate changes three aspects, the boundary condition defined in contrasting this research, core at the shear property and disease of the core sample being on active service 4 years
Sample is close to, and the core sample place road surface that this explanation is on active service 4 years is aging serious, with the risk for rut disease occur, also illustrates which is residual
The remaining life-span is shorter, and other be on active service the times core sample according to be on active service the time increase, performance has declined, but still has certain
Residual life, in the case where keeping present situation constant, still can be on active service for a long time.
The above is only the preferred embodiment of the present invention, it is noted that for one of ordinary skill in the art comes
Say, without departing from the concept of the premise of the invention, some modifications and variations can also be made, these belong to the present invention's
Protection domain.
Claims (4)
1. using the method for interlayer shear experimental evaluation road surface aging conditions, it is characterised in that comprise the following steps：
To live road surface core boring sampling, the different Years Of Services of collection not yet produce disease section and phase Years Of Service Required disease road
The road surface core sample of section；
Different Years Of Services are not yet produced with the interlayer shear-strength test that the core sample in disease section is carried out between upper layer and middle surface layer,
Its related anti-shear performance aging curve figure is made according to the data obtained by test；The related anti-shear performance is aging
Curve chart includes shearing strength at intersection shearing stress figure, maximum strain figure and shear stress-strain curve figure；Shear strength intensity is got over
Low, maximum strain is bigger, load-deformation curve is more precipitous, represent it is aging more serious, otherwise it is then aging slight；
The interlayer shear-strength test between upper layer and middle surface layer is carried out to the road surface core sample in phase Years Of Service Required disease section, will
To data and chart carry out disease boundary condition treatment, define the disease boundary condition of the road section surface；The boundary condition
It is oblique for the average interlayer shear strength in phase Years Of Service Required disease section, average maximum strain and shear stress-strain curve
Rate；Average interlayer shear strength is bigger, and average maximum strain is less, and load-deformation curve is then aging lighter closer to S types
It is micro-, on the contrary it is then aging serious；
Above-mentioned different Years Of Services are not yet produced into the related anti-shear performance aging curve figure in disease section and corresponding clothes
The disease boundary condition in labour time limit disease section carries out conjoint analysis, the common aging conditions for evaluating whole piece section.
2. as claimed in claim 1 using the method for interlayer shear experimental evaluation road surface aging conditions, it is characterised in that it is described not
It is the section on same highway to be measured that disease section is not yet produced with Years Of Service, and temporal span was half a year to 1 year.
3. as claimed in claim 1 using the method for interlayer shear experimental evaluation road surface aging conditions, it is characterised in that the phase
Core sample of the road surface core sample in Years Of Service Required disease section for diverse location at disease section, including non-rut, rut and curb
The core sample at place.
4. as claimed in claim 1 using the method for interlayer shear experimental evaluation road surface aging conditions, it is characterised in that the layer
Between shearing test comprise the following steps：
1) core sample and mould are incubated in the environment of 10 DEG C, temperature retention time is at least 5h；
2) the Marshall stability analyzer rate of climb is set for 50mm/min, and level-off；
3) it is placed on Marshall stability analyzer platform at once after take out the mould of good heat insulation, while a core sample is taken out,
Fix in being put into mould；
4) Marshall Test is carried out according to Marshall Test code requirement, and carry out immediately unloading sample after this core sample off-test,
And mould is moved back to into couveuse continuation insulation；
5) machine is adjusted, record data carries out the experiment of next core sample.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487018A (en) * | 2018-03-28 | 2018-09-04 | 西安电子科技大学 | Asphalt road surface by microwave heating restorative procedure based on surface layer preheating |
| CN109580396A (en) * | 2018-11-28 | 2019-04-05 | 南京林业大学 | A kind of test method of bituminous pavement superficial layer load fatigue damage degree |
| CN110008535A (en) * | 2019-03-18 | 2019-07-12 | 山西省交通科学研究院有限公司 | One kind is for creating bituminous pavement water stability Index |
| CN110823717A (en) * | 2019-11-01 | 2020-02-21 | 广州大学 | Semi-flexible pavement shear strength testing device and testing method |
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| CN102297811A (en) * | 2011-05-27 | 2011-12-28 | 长安大学 | Method for detecting inter-laminar shear stress and strain of asphalt road |
| CN105651977A (en) * | 2015-08-28 | 2016-06-08 | 武汉理工大学 | Asphalt pavement aging simulating method |
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| CN102297811A (en) * | 2011-05-27 | 2011-12-28 | 长安大学 | Method for detecting inter-laminar shear stress and strain of asphalt road |
| CN105651977A (en) * | 2015-08-28 | 2016-06-08 | 武汉理工大学 | Asphalt pavement aging simulating method |
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| Title |
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| P.E. YUHONG WANG等: "Evolution and locational variation of asphalt binder aging in long-life hot-mix asphalt pavements", 《CONSTRUCTION AND BUILDING MATERIALS》 * |
| 万九鸣等: "沥青路面公路技术状况评价研究", 《武汉理工大学学报（交通科学与工程版）》 * |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487018A (en) * | 2018-03-28 | 2018-09-04 | 西安电子科技大学 | Asphalt road surface by microwave heating restorative procedure based on surface layer preheating |
| CN109580396A (en) * | 2018-11-28 | 2019-04-05 | 南京林业大学 | A kind of test method of bituminous pavement superficial layer load fatigue damage degree |
| CN110008535A (en) * | 2019-03-18 | 2019-07-12 | 山西省交通科学研究院有限公司 | One kind is for creating bituminous pavement water stability Index |
| CN110008535B (en) * | 2019-03-18 | 2023-06-30 | 山西省交通科技研发有限公司 | Method for determining water stability index of newly-built asphalt pavement |
| CN110823717A (en) * | 2019-11-01 | 2020-02-21 | 广州大学 | Semi-flexible pavement shear strength testing device and testing method |
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