CN105352795A - Method for determining influence depth of bituminous pavement sealing material based on uni-axial penetration test - Google Patents
Method for determining influence depth of bituminous pavement sealing material based on uni-axial penetration test Download PDFInfo
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- CN105352795A CN105352795A CN201510697975.9A CN201510697975A CN105352795A CN 105352795 A CN105352795 A CN 105352795A CN 201510697975 A CN201510697975 A CN 201510697975A CN 105352795 A CN105352795 A CN 105352795A
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0087—Resistance to crushing
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Abstract
The invention discloses a method for determining influence depth of a bituminous pavement sealing material based on a uni-axial penetration test. The method comprises the following steps: 1) preparing a test piece, preparing a drilled core for a bituminous pavement or preparing the drilled core indoor; 2) placing the test piece in a thermotank for insulating to constant temperature; 3) taking the test piece out of the thermotank and performing a lateral-restrict-free uni-axial penetration test on the test piece, compressing the test piece until the test piece is destroyed or penetration for a certain depth is carried out; 4) collecting a penetration load and a penetration depth in a real time mode; and 5) obtaining the influence depth of sealing layers with different smearing amounts according to an intersection point of a load-penetration depth curve of the test piece with the sealing layer and the load-penetration depth curve of the test piece without the sealing layer. The method provides a theoretical basis for selection of an appropriate sealing layer form for preventive maintenance of the pavement, material usage amount, and evaluation on effect of the sealing layer, establishes a base for reducing maintenance cost of a pavement life period, increasing pavement usage performance and prolonging the pavement service life, and has obvious technical, economic, social and environmental benefits.
Description
Technical field
The invention belongs to Preventive Maintenances of Asphalt Pavement field.Be specifically related to adopt the method determining the sealing material influence depth of bituminous pavement preventive maintenance without side limit uniaxial penetration test.
Background technology
Along with the fast development that highway in China is built, the construction of arterial highway completes substantially, highway traffic infrastructure from based on the stage of building to based on the step transition of maintenance management.In recent years, the preventive maintenance measure based on top dressing is widely used in the bituminous pavement of each standard highway, for improving surface feature, extending bituminous pavement and serving positive effect serviceable life.But, the degree that these preventive maintenance measures based on top dressing recover the material property of old asphalt pavement and improve, and the scope of impact has much, also do not have definite answer so far, people can only be judged by experience.This is for the correct suitability evaluated maintenance measure and select, the effect of preventive maintenance, and improvement and the optimization of preventive maintenance are all disadvantageous.The method that the present invention proposes efficiently solves this problem, and for road surface preventive maintenance selects suitable sealing form, the design of material usage and the evaluation of sealing effect provide theoretical foundation and method.For the scientific management on road surface, reduce the life cycle maintenance costs on road surface, improve Pavement Condition, the serviceable life extending road surface haves laid a good foundation.This method can be used for each standard highway and Urban Road Asphalt Pavement preventive maintenance effect assessment, has significant technology, economy, society and environmental benefit.
Summary of the invention
For above-mentioned technical matters, the invention provides a kind of method based on uniaxial penetration test determination bituminous pavement sealing material influence depth, for road surface preventive maintenance maintenance is suitable for the selection of sealing form, the design of material usage and the evaluation of sealing effect provide theoretical foundation.
The present invention adopts following technical scheme to realize:
Based on the method for uniaxial penetration test determination bituminous pavement sealing material influence depth, comprise step:
(1) prepare test specimen, by highway engineering pitch and Asphalt Mixture Experiment code, the sampling of brill core is carried out to bituminous pavement, and cut into identical thickness marshal piece, at least prepare two groups of test specimens, implement sealing for one group, another group does not implement sealing, and often group is no less than three test specimens;
Or,
Prepare asphalt marshal piece in indoor, prepare four groups of test specimens altogether, do not implement sealing for one group, implement sealing for another three groups, often organize sealing applying amount different, often organize and at least prepare three test specimens;
(2) pre-set constant temperature case temperature, and test specimen is placed in constant temperature oven be incubated to constant temperature;
(3) test specimen is taken out from constant temperature oven, use the universal testing machine being provided with uniaxial penetration pressure head to implement, without side limit uniaxial penetration test, to be depressed into test specimen and to destroy or reach certain depth of penetration to test specimen fast with certain loading speed;
(4) according to the real-time test figure of data collection interval collection adapted with loading speed, penetration load, depth of penetration is comprised;
(5) draw out the test specimen load-depth of penetration curve smearing sealing and the load not smearing sealing test specimen-depth of penetration curve according to the mean value often organizing test specimen, draw the influence depth of the sealing that each applying amount is different according to the load-depth of penetration curve often organizing the test specimen implementing sealing and the intersection point of the load-depth of penetration curve not implementing sealing test specimen.
Further, the preset temperature of described constant temperature oven is 25 ± 0.5 DEG C.
Further, described universal testing machine is 10t universal testing machine.
Further, the loading speed described in step (3) is 2mm/s-4mm/s, can determine according to different demand.
Further, in step (4), the acquisition time of described data is spaced apart 0.01s or 0.02s, and data volume is according to demand determined, to ensure to record complete process of the test.
Further, the diameter of described uniaxial penetration pressure head is 28mm.
Compared to existing technology, the invention has the beneficial effects as follows:
The present invention cannot judge or evaluate the influence depth scope of sealing material after efficiently solving and implementing preventive maintenance to bituminous pavement in the past, therefore the problem of maintenance effect cannot be evaluated, for road surface preventive maintenance maintenance is suitable for the selection of sealing form, the design of material usage and the evaluation of sealing effect provide theoretical foundation, for the scientific management on road surface, reduce the life cycle maintenance costs on road surface, improve Pavement Condition, the serviceable life extending road surface haves laid a good foundation.This method can be used for each standard highway and Urban Road Asphalt Pavement preventive maintenance effect assessment, has significant technology, economy, society and environmental benefit.
Accompanying drawing explanation
Fig. 1 is virtual uniaxial penetration test load-depth of penetration curve.
Fig. 2 is that test specimen is implemented without side limit uniaxial penetration test schematic diagram.
Fig. 3 is each test specimen uniaxial penetration test load-depth of penetration curve of embodiment one.
Fig. 4 is the sealing applying amount of embodiment one and the graph of a relation of depth of penetration.
Shown in figure be: 1-uniaxial penetration pressure head; 2-test specimen.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
embodiment one
Based on the method for uniaxial penetration test determination bituminous pavement sealing material influence depth, comprise step:
(1) prepare test specimen 2, prepare asphalt marshal piece in indoor, prepare four groups of test specimens 2, a group altogether and do not implement sealing, implement sealing for another three groups, often organize sealing applying amount different, often organize and at least prepare three test specimens 2;
(2) pre-set constant temperature case temperature is 25 DEG C, and is placed in constant temperature oven by test specimen 2 and be incubated to constant temperature;
(3) test specimen 2 is taken out from constant temperature oven, the 10t universal testing machine being provided with the uniaxial penetration pressure head 1 that diameter is 28mm is used to implement without side limit uniaxial penetration test to test specimen fast with the loading speed of 3mm/s, be depressed into the depth of penetration that test specimen 2 destroys or reaches 10mm, the diameter of uniaxial penetration pressure head 1 is less than 1/3rd of test specimen diameter; (as shown in Figure 2);
(4) real-time test figure is gathered according to the time interval of 0.02s, comprise penetration load, depth of penetration, as shown in Figure 3, as can be seen from the figure, depth of penetration corresponding to the peak value of injection intensity increases with the increase of sealing applying amount, and this reflects sealing infiltration capacity and length of penetration to a certain extent on the impact of injection intensity;
(5) the test specimen load-depth of penetration curve smearing sealing and the load not smearing sealing test specimen-depth of penetration curve is drawn out according to the mean value often organizing test specimen 2, the influence depth of the sealing that each applying amount is different is drawn according to load-depth of penetration curve and the intersection point of the load-depth of penetration curve not implementing sealing test specimen 2 of often organizing the test specimen 2 implementing sealing, as shown in Figure 4, if depth of penetration corresponding with the intersection point of the load-depth of penetration curve not smearing sealing test specimen 2 for the test specimen 2 loads-depth of penetration curve smearing sealing is defined as the coverage of sealing or nominal length of penetration, then the length of penetration (i.e. influence depth) of sealing and the applying amount of sealing linear, this relation is consistent with Darcy's law in some sense.
embodiment two
The difference of the present embodiment and embodiment one is: test specimen 2 carries out brill core by highway engineering pitch and Asphalt Mixture Experiment code (JTGE2011) to bituminous pavement to sample, and cut into identical thickness marshal piece, at least prepare two groups of test specimens 2, implement sealing for one group, another group does not implement sealing, and often group is no less than three test specimens 2.
The principle of above-described embodiment is as follows:
Utilize discrete element software grain flow ParticleFlowCode(PFC) Modling model, PFC software adopts Discrete-parcel method modeling, generally the aggregate particle of complex contour is reduced to desirable spherical to analyze, by arranging the rill evolution such as friction factor, contact performance, the thin sight contact performance gathered materials is simulated, to make the virtual test specimen performance of generation close to real test specimen.As the research of generalities or mechanism, the single particle size universal model that the present invention generates comprises surface and does not apply the situation of sealing and the situation of surface applying sealing, and the situation that surface applies sealing realizes by changing the endocorpuscular rigidity of model superstructure certain limit.Carry out virtual uniaxial penetration load test to two models respectively, namely by writing PFC code, on the surface of virtual test specimen, newly-built one section of wall is as injection head, revests injection first initial velocity, then makes injection head slowly move down, until test specimen destroys.
Software can record the stress-deformation data of virtual test specimen penetration test overall process, derives stress-deformation data, and EXPERIMENTAL STRAIN-STRESS CONVERSION is become load, namely can obtain the load-depth of penetration curve of the virtual penetration test of single shaft, as shown in Figure 1.
Can be found by simulation test: after (1) implements virtual sealing, the load-bearing capacity of test specimen is increased, and is consistent with the actual road surface situation implemented after sealing; (2) load-depth of penetration curve implementing sealing test specimen can be crossing with the load-depth of penetration curve not implementing sealing test specimen, and overlap after intersection point.This phenomenon illustrates, surperficial sealing has certain influence depth, and when injection head is by after this degree of depth, Mechanical Properties of Materials can return to the material situation not implementing sealing.As can be seen from Figure 1, the depth of penetration that intersection point is corresponding and the thickness of virtual sealing basically identical.This depth of penetration is defined as the influence depth of sealing material or nominal length of penetration by the present invention.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (6)
1., based on the method for uniaxial penetration test determination bituminous pavement sealing material influence depth, it is characterized in that, comprise step:
(1) prepare test specimen, by highway engineering pitch and Asphalt Mixture Experiment code, the sampling of brill core is carried out to bituminous pavement, and cut into identical thickness marshal piece, at least prepare two groups of test specimens, implement sealing for one group, another group does not implement sealing, and often group is no less than three test specimens;
Or,
Prepare asphalt marshal piece in indoor, prepare four groups of test specimens altogether, do not implement sealing for one group, implement sealing for another three groups, often organize sealing applying amount different, often organize and at least prepare three test specimens;
(2) pre-set constant temperature case temperature, and test specimen is placed in constant temperature oven be incubated to constant temperature;
(3) test specimen is taken out from constant temperature oven, use the universal testing machine being provided with uniaxial penetration pressure head to implement, without side limit uniaxial penetration test, to be depressed into test specimen and to destroy or reach certain depth of penetration to test specimen fast with certain loading speed;
(4) according to the real-time test figure of data collection interval collection adapted with loading speed, penetration load, depth of penetration is comprised;
(5) draw out the test specimen load-depth of penetration curve smearing sealing and the load not smearing sealing test specimen-depth of penetration curve according to the mean value often organizing test specimen, draw the influence depth of the sealing that each applying amount is different according to the load-depth of penetration curve often organizing the test specimen implementing sealing and the intersection point of the load-depth of penetration curve not implementing sealing test specimen.
2. method according to claim 1, is characterized in that: the preset temperature of described constant temperature oven is 25 ± 0.5 DEG C.
3. method according to claim 1, is characterized in that: described universal testing machine is 10t universal testing machine.
4. method according to claim 1, is characterized in that: the loading speed described in step (3) is 2mm/s-4mm/s.
5. method according to claim 1, is characterized in that: in step (4), the acquisition time of described data is spaced apart 0.01s or 0.02s.
6. method according to claim 1, is characterized in that: the diameter of described uniaxial penetration pressure head is 28mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510697975.9A CN105352795B (en) | 2015-10-21 | 2015-10-21 | The method for determining bituminous paving sealing material influence depth based on uniaxial penetration test |
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| CN201510697975.9A CN105352795B (en) | 2015-10-21 | 2015-10-21 | The method for determining bituminous paving sealing material influence depth based on uniaxial penetration test |
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| CN105352795A true CN105352795A (en) | 2016-02-24 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588760A (en) * | 2016-02-29 | 2016-05-18 | 长安大学 | Single-axial injection method for bituminous mixture |
| CN106323757A (en) * | 2016-09-06 | 2017-01-11 | 哈尔滨工业大学 | Pouring asphalt concrete penetration test device |
| CN107271272A (en) * | 2016-10-21 | 2017-10-20 | 中国矿业大学 | A kind of pan soil intensity and the probe test apparatus and method of structured testing |
| CN109580349A (en) * | 2018-12-12 | 2019-04-05 | 中咨公路养护检测技术有限公司 | A kind of pitch cold-patch mixture performance experimental rig and test method |
| CN110514818A (en) * | 2018-05-22 | 2019-11-29 | 南京林业大学 | A kind of test method of quantitative assessment Bituminous Pavement Cold feed supplement construction workability |
| CN111912703A (en) * | 2020-09-28 | 2020-11-10 | 芜湖质达设计有限公司 | Steel bridge bituminous pavement shearing fatigue degree detection equipment |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588760A (en) * | 2016-02-29 | 2016-05-18 | 长安大学 | Single-axial injection method for bituminous mixture |
| CN105588760B (en) * | 2016-02-29 | 2018-10-09 | 长安大学 | A kind of uniaxial penetration method of asphalt |
| CN106323757A (en) * | 2016-09-06 | 2017-01-11 | 哈尔滨工业大学 | Pouring asphalt concrete penetration test device |
| CN107271272A (en) * | 2016-10-21 | 2017-10-20 | 中国矿业大学 | A kind of pan soil intensity and the probe test apparatus and method of structured testing |
| CN107271272B (en) * | 2016-10-21 | 2019-08-09 | 中国矿业大学 | A kind of probe test device and method of pan soil intensity and structured testing |
| CN110514818A (en) * | 2018-05-22 | 2019-11-29 | 南京林业大学 | A kind of test method of quantitative assessment Bituminous Pavement Cold feed supplement construction workability |
| CN109580349A (en) * | 2018-12-12 | 2019-04-05 | 中咨公路养护检测技术有限公司 | A kind of pitch cold-patch mixture performance experimental rig and test method |
| CN111912703A (en) * | 2020-09-28 | 2020-11-10 | 芜湖质达设计有限公司 | Steel bridge bituminous pavement shearing fatigue degree detection equipment |
| CN111912703B (en) * | 2020-09-28 | 2022-12-16 | 铁正检测科技有限公司 | Steel bridge bituminous pavement shearing fatigue degree detection equipment |
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