CN204679335U - A kind of New asphalt mixture layer Reflective Cracking Resistance test test specimen - Google Patents
A kind of New asphalt mixture layer Reflective Cracking Resistance test test specimen Download PDFInfo
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- CN204679335U CN204679335U CN201520412692.0U CN201520412692U CN204679335U CN 204679335 U CN204679335 U CN 204679335U CN 201520412692 U CN201520412692 U CN 201520412692U CN 204679335 U CN204679335 U CN 204679335U
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Abstract
The utility model discloses a kind of New asphalt mixture layer Reflective Cracking Resistance test test specimen, comprise steel plate die trial, in described steel plate die trial, rubber flaggy is set, region of coming to nothing is provided with in the middle part of rubber flaggy, old asphalt concrete pavement layer is provided with above rubber layer, described old asphalt concrete pavement layer is two pieces and interval 0.5cm-1cm, stress absorbing layer is provided with above described old asphalt concrete pavement layer, be provided with New asphalt mixture layer above described stress absorbing layer, bottom New asphalt mixture layer, be adhesive with resistance strain gage with end face.The utility model structure is simple, and water resistance is good and head toothbrushes replacing is convenient.This test test specimen structure is simple, ensure that the validity and reliability of test findings, is conducive to solving engineering problem better according to the evaluation conclusion that test findings is made.
Description
Technical field
The utility model relates to field of a kind of road and bridge, particularly a kind of New asphalt mixture layer Reflective Cracking Resistance test test specimen.
Background technology
Due to have pavement performance good, construct convenient, to plurality of advantages such as original traffic impact are little, New asphalt mixture layer, as the typical rebuilding old road scheme of one, is used widely in Reconstruction of City Road engineering.But old cement or bituminous concrete pavement connect, crack will be reflected by New asphalt mixture layer in the double action of vehicular load and environmental baseline and form reflection crack, and then affecting the permanance of New asphalt mixture layer.Therefore, the problem of preventing and treating of New asphalt mixture layer reflection crack becomes one of key issue of rebuilding old road success or failure.
At present, the method for domestic and international studying and combating New asphalt mixture layer reflection crack mainly comprises theoretical and experimental study two aspect.Theoretical research mainly adopts static force analysis method, three-dimensional finite element analysis method, fracturing mechanics and damage mechanics etc.Although theoretical analysis can provide certain theoretical foundation for reflection crack research, but be limited to the factors such as the variability of the complicacy of old pavement additional spreading course structure, material parameter and computation modeling, only can not solve complicated engineering problem completely according to theoretical analysis.
Experimental study mainly adopts diametral compression test, bend tension torture test, uniaxial direct tensile torture test etc., these tests are mostly subsized specimen test, and be directed to asphalt self, New asphalt mixture layer Mechanism of Reflection Cracks and crack propagation situation can not be reflected truly comprehensively, there is larger difference with actual conditions.In order to simulating actual conditions better, researchist proposes some test models in succession.Chang An University proposes New asphalt mixture layer reflection crack universal testing machine (MTS) torture test model.This model weak point is: (1) load action mode adopts load, mainly inconsistent by wheel load effect with reflection crack; (2) adopt rubber Full connected below Jiu Lu crack, produce with crack that to cause rainwater to soak softening basic unit's (basic unit comes to nothing) inconsistent.
In order to simulating wheel load repeat function truly of trying one's best is having the bituminous concrete situation connecing the existing cement-concrete pavement overlay that (splitting) stitches, South China Science & Engineering University proposes Asphalt pavement analyzer (AAPA) test model.This model weak point is not consider below Jiu Lu crack that basic unit comes to nothing situation.
Before summary on experiential basis, Chang An University, based on asphalt mixture in track test, proposes New asphalt mixture layer reflection crack wheel load test model.This model weak point is do not consider below crack that basic unit comes to nothing situation equally.
Utility model content
Because the above-mentioned defect of prior art, technical problem to be solved in the utility model is to provide a kind of New asphalt mixture layer Reflective Cracking Resistance test test specimen, this test test specimen structure is simple, ensure that the validity and reliability of test findings, be conducive to solving engineering problem better according to the evaluation conclusion that test findings is made.
For achieving the above object, the utility model provides a kind of New asphalt mixture layer Reflective Cracking Resistance test test specimen, comprise steel plate die trial, in described steel plate die trial, rubber flaggy is set, region of coming to nothing is provided with in the middle part of rubber flaggy, old asphalt concrete pavement layer is provided with above rubber layer, described old asphalt concrete pavement layer is two pieces and interval 0.5cm-1cm, stress absorbing layer is provided with above described old asphalt concrete pavement layer, New asphalt mixture layer is provided with above described stress absorbing layer, resistance strain gage is adhesive with end face bottom New asphalt mixture layer.
Further, it is characterized in that, described steel plate die trial comprises steel plate base plate, and described steel plate base plate is removably connected with steel plate side plate, and described steel plate base plate is that 1cm is thick, and length and width are 30cm × 30cm.
The beneficial effects of the utility model are: the utility model structure is simple, and this test test specimen structure is simple, ensure that the validity and reliability of test findings, is conducive to solving engineering problem better according to the evaluation conclusion that test findings is made.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the utility model front view.
In figure: 1, steel plate die trial; 11, steel plate side plate; 12, steel plate base plate; 2, New asphalt mixture layer; 3, stress absorbing layer; 4, old asphalt concrete pavement layer; 5, crack; 6, rubber flaggy; 7, to come to nothing region; 8, rolling wheel.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
See a kind of New asphalt mixture layer Reflective Cracking Resistance test test specimen shown in Fig. 1 to Fig. 2, comprise steel plate die trial 1, in described steel plate die trial 1, rubber flaggy 6 is set, region 7 of coming to nothing is provided with in the middle part of rubber flaggy 6, old asphalt concrete pavement layer 4 is provided with above rubber layer, described old asphalt concrete pavement layer 4 is two pieces and interval 0.5cm-1cm, stress absorbing layer 3 is provided with above described old asphalt concrete pavement layer 4, New asphalt mixture layer 2 is provided with above described stress absorbing layer 3, resistance strain gage is adhesive with end face bottom New asphalt mixture layer 2.
Further, described steel plate die trial 1 comprises steel plate base plate 12, and described steel plate base plate 12 is removably connected with steel plate side plate 11, and described steel plate base plate 12 is that 1cm is thick, and length and width are 30cm × 30cm.
The concrete steps of this test test material preparation are as follows:
1. the roller-compaction of old asphalt concrete pavement layer 4
First preparing asphalt compound test specimen, then steel brush and emery wheel is adopted to wash away the top layer asphalt membrane of bitumen mixture specimen to simulate old asphalt pavement, in cutting machine, edge is cut into two pieces of width 15cm perpendicular to rolling direction again, two pieces are become again along New asphalt mixture layer transverse cuts, finally two blocks of test block plates are put into from molding jig, ensure that the width in crack 5 is 0.5cm or 1cm.
2. the roller-compaction of test specimen is tested
The self-control steel plate die trial 1 that the roller-compaction of test test specimen adopts is of a size of 30cm × 30cm × 10cm, the compositions such as this steel plate die trial steel plate base plate 12, steel plate side plate 11, so can freely dismantle and install, and the complete demoulding after facilitating specimen molding.
First, thick 30cm × 30cm the steel plate of one deck 1cm is overlayed and a layer thickness is 30cm × 30cm rubber flaggy 6 that 2cm is thick bottom steel plate die trial 1, old asphalt concrete pavement layer 4 is positioned on rubber flaggy 6, old asphalt concrete pavement layer 4 is that two block gaps are arranged, and the distance between its crack 5 is 0.5cm or 1cm;
Then, stress absorbing layer 3 is overlayed again after old asphalt concrete pavement layer 4 sprays sticking layer oil, then the overlay asphalt SMA-10 mixed and stirred is poured on the stress absorbing layer 3 in mould, the width in crack 5 will be ensured in this process, and do not have filling material in crack 5;
Finally, molded with rolling rolling 8.During roller-compaction, first rolling wheel 8 is preheated to about 100 DEG C, then the die trial filling compound is placed on edge runner platform, make the direction of rolling along the direction in crack 5, New asphalt mixture layer 2 covers one deck old newsprint, put down rolling wheel 8 gently after test specimen centering, be loaded on 900kN, startup rolling wheel rolls 2 and comes and goes in this direction; Unloading, turns round 90 °, is namely rolling perpendicular to direction, crack 5, apply identical load and roll to 100 ± 1% of Marshall standard packing by test specimen.
3. after the test test specimen of forming being placed 48h, with cutting machine along perpendicular to direction, crack 5, composite plate being cut into equal and opposite in direction two parts, namely sample dimensions is 30cm × 15cm × 7cm, wherein old asphalt pavement thickness is 5cm, New asphalt mixture layer 2 thickness is 2cm, after being dried by test specimen, the rolling test of Reflection Cracking can be carried out.
This test test specimen is anti-adopts the wheel rutting test machine after reequiping to test, when test, temperature controls at 15 ± 2 DEG C, owing to pasting resistance strain gage (not shown) with end face bottom New asphalt mixture layer 2, reverse cyclic loadings number of times when the strain value of record two resistance strain gages is undergone mutation respectively, namely obtain the life-span at cracking (incipient crack) and top cracking (splitting eventually) bottom New asphalt mixture layer 2, thus the ability of different pressures absorption layer and overlay asphalt Reflection Cracking can be evaluated.
The advantage that the present invention tests test specimen is mainly reflected in:
1, adopt the die trial of self-control steel plate, guarantee that preparation technology is simple, sample dimensions precision and stability;
2, adopt wheel reverse cyclic loadings mode, guarantee that test loading effect is consistent with Mechanism of Reflection Cracks;
3, adopt process of coming to nothing below test specimen crack 5, guarantee that process of the test load transmission effect and old base course are consistent because rainwater permeates along crack 5 and soak deliquescing.
To sum up, the present invention tests test specimen and has carried out rational modification from test material preparation and test loading principle two aspect, thus ensure that the validity and reliability of test findings, is conducive to solving engineering problem better according to the evaluation conclusion that test findings is made.
More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without the need to creative work.Therefore, all technician in the art according to design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should by the determined protection domain of claims.
Claims (2)
1. a New asphalt mixture layer Reflective Cracking Resistance test test specimen, it is characterized in that, comprise steel plate die trial, in described steel plate die trial, rubber flaggy is set, region of coming to nothing is provided with in the middle part of rubber flaggy, old asphalt concrete pavement layer is provided with above rubber layer, described old asphalt concrete pavement layer is two pieces and interval 0.5cm-1cm, stress absorbing layer is provided with above described old asphalt concrete pavement layer, be provided with New asphalt mixture layer above described stress absorbing layer, bottom New asphalt mixture layer, be adhesive with resistance strain gage with end face.
2. New asphalt mixture layer Reflective Cracking Resistance test test specimen as claimed in claim 1, it is characterized in that, described steel plate die trial comprises steel plate base plate, and described steel plate base plate is removably connected with steel plate side plate, described steel plate base plate is that 1cm is thick, and length and width are 30cm × 30cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520412692.0U CN204679335U (en) | 2015-06-16 | 2015-06-16 | A kind of New asphalt mixture layer Reflective Cracking Resistance test test specimen |
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| CN201520412692.0U CN204679335U (en) | 2015-06-16 | 2015-06-16 | A kind of New asphalt mixture layer Reflective Cracking Resistance test test specimen |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345870A (en) * | 2017-06-12 | 2017-11-14 | 扬州大学 | One kind evaluation rubber asphalt stress absorbing layer stress absorption ability specimen molding technique |
| CN108196039A (en) * | 2018-03-15 | 2018-06-22 | 郑州大学 | Characteristic of crack and its simulator and method on overlay influence between broken block |
| CN109100246A (en) * | 2018-07-06 | 2018-12-28 | 南京林业大学 | A kind of road surface Reflection Cracking performance test methods and track plate test piece mould |
| CN109115582A (en) * | 2018-11-01 | 2019-01-01 | 广西建设职业技术学院 | A kind of mold and method preparing permeation coefficient of permeable concrete measurement sample |
| CN109683023A (en) * | 2018-12-26 | 2019-04-26 | 重庆交通大学 | It is compacted the thickness of bituminous surface at scene and the measurement method of dielectric constant |
| CN110837082A (en) * | 2019-11-27 | 2020-02-25 | 东南大学 | Testing device and testing method for detecting ground penetrating radar of pavement cracks |
| CN110865370A (en) * | 2019-11-27 | 2020-03-06 | 东南大学 | Ground penetrating radar detection test device and method for loose and accumulated water positions in road |
| CN111610099A (en) * | 2020-07-08 | 2020-09-01 | 郑州大学 | Rubber concrete fracture performance analysis method based on temperature and humidity changes |
| CN112415175A (en) * | 2020-12-15 | 2021-02-26 | 中国路桥工程有限责任公司 | Physical model test device for ground fissure |
| CN113376037A (en) * | 2021-06-08 | 2021-09-10 | 宜昌砼富公路养护有限公司 | Test method and test device for simulating pavement reflection cracks |
| CN113447388A (en) * | 2021-06-29 | 2021-09-28 | 重庆市潼南区九橡化大环保科技有限公司 | Asphalt ductility instrument calibration test piece and preparation method and calibration method thereof |
| CN114459895A (en) * | 2021-12-31 | 2022-05-10 | 广州市交通设计研究院有限公司 | Test method for evaluating anti-reflection crack capability of stress absorption layer |
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2015
- 2015-06-16 CN CN201520412692.0U patent/CN204679335U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345870A (en) * | 2017-06-12 | 2017-11-14 | 扬州大学 | One kind evaluation rubber asphalt stress absorbing layer stress absorption ability specimen molding technique |
| CN108196039A (en) * | 2018-03-15 | 2018-06-22 | 郑州大学 | Characteristic of crack and its simulator and method on overlay influence between broken block |
| CN108196039B (en) * | 2018-03-15 | 2024-02-27 | 郑州大学 | Device and method for simulating crack characteristics among broken blocks and influence of crack characteristics on layering |
| CN109100246A (en) * | 2018-07-06 | 2018-12-28 | 南京林业大学 | A kind of road surface Reflection Cracking performance test methods and track plate test piece mould |
| CN109100246B (en) * | 2018-07-06 | 2021-03-16 | 南京林业大学 | Pavement anti-reflection crack performance testing method and track plate test piece mold |
| CN109115582A (en) * | 2018-11-01 | 2019-01-01 | 广西建设职业技术学院 | A kind of mold and method preparing permeation coefficient of permeable concrete measurement sample |
| CN109683023A (en) * | 2018-12-26 | 2019-04-26 | 重庆交通大学 | It is compacted the thickness of bituminous surface at scene and the measurement method of dielectric constant |
| CN110837082A (en) * | 2019-11-27 | 2020-02-25 | 东南大学 | Testing device and testing method for detecting ground penetrating radar of pavement cracks |
| CN110865370A (en) * | 2019-11-27 | 2020-03-06 | 东南大学 | Ground penetrating radar detection test device and method for loose and accumulated water positions in road |
| CN111610099B (en) * | 2020-07-08 | 2022-08-02 | 郑州大学 | Rubber concrete fracture performance analysis method based on temperature and humidity changes |
| CN111610099A (en) * | 2020-07-08 | 2020-09-01 | 郑州大学 | Rubber concrete fracture performance analysis method based on temperature and humidity changes |
| CN112415175A (en) * | 2020-12-15 | 2021-02-26 | 中国路桥工程有限责任公司 | Physical model test device for ground fissure |
| CN112415175B (en) * | 2020-12-15 | 2023-01-06 | 中国路桥工程有限责任公司 | Physical model test device for ground fissure |
| CN113376037A (en) * | 2021-06-08 | 2021-09-10 | 宜昌砼富公路养护有限公司 | Test method and test device for simulating pavement reflection cracks |
| CN113447388A (en) * | 2021-06-29 | 2021-09-28 | 重庆市潼南区九橡化大环保科技有限公司 | Asphalt ductility instrument calibration test piece and preparation method and calibration method thereof |
| CN114459895A (en) * | 2021-12-31 | 2022-05-10 | 广州市交通设计研究院有限公司 | Test method for evaluating anti-reflection crack capability of stress absorption layer |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20170616 |