CN101509854B - Rut test piece temperature gradient emulation apparatus - Google Patents
Rut test piece temperature gradient emulation apparatus Download PDFInfo
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- CN101509854B CN101509854B CN2009100428742A CN200910042874A CN101509854B CN 101509854 B CN101509854 B CN 101509854B CN 2009100428742 A CN2009100428742 A CN 2009100428742A CN 200910042874 A CN200910042874 A CN 200910042874A CN 101509854 B CN101509854 B CN 101509854B
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- die trial
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Abstract
The invention discloses a temperature and gradient simulating device of a wheel tracking test piece, comprising a testing mold (7). The side wall of the testing mold (7) is provided with a layer of thermal insulation material (4); the inner bottom of a water tank (6) is provided with a plurality of bearing bars (5) which are arranged uniformly and have same height; the height of side plates at the periphery of the water tank (6) is higher than that of the bearing bars (5); the length and the width of an inner cavity of the water tank (6) are respectively larger than those of the testing mold (7); the bottom of the testing mold (7) is arranged on the bearing bars (5) in the water tank (6); one side of the water tank (6) is connected with an water inlet tank (8) and the other side thereof is connected with a water outlet tank (3); the water inlet tank (8) is provided with a temperature measuring and controlling device (1); and a water circulating device (2) is connected between the water outlet tank (3) and the water inlet tank (8). The temperature and gradient simulating device can form a temperature field in the test piece and changes continuously along the thickness and has simple structure, low cost and convenient manufacture.
Description
Technical field
The present invention relates to test battery condition opertaing device, particularly relate to and a kind ofly be used for the highway engineering asphalt mixture in track test time control test specimen temperature inside distributes to form the rut test piece temperature simulation device of gradient.
Background technology
Increase in China along with traffic volume of highway, the increasing and the formation of canalized traffic of heavy-duty vehicle, many bituminous pavements have all produced rut in various degree, we can say that rut is one of principal mode of road damage.Wheel tracking test is a kind ofly to simulate that the actual wheel load is walked and the engineering test method that forms rut on the road surface, purpose is to estimate asphalt resist the plastic flow deformation ability under the set point of temperature condition, this wherein key just be that the difference between wheel tracking test condition and the road surface reality has much.Temperature is highly nonlinear along the distribution of the road surface degree of depth in the actual road surface, and when adopting standard rut instrument to carry out wheel tracking test at present, because the restriction of testing equipment, can only single test apply a temperature, as 60 ℃, situation with simulated roadway high temperature, at this moment, all identical promptly 60 ℃ of the temperature of being had a few in the whole wheel tracking test plate with constant temperature the temperature inside the box, this obviously with actual road surface in the temperature field distribution be not inconsistent, the correlativity of the anti-rut performance of its test findings and actual road surface is worth suspecting, and is when particularly specimen thickness is bigger, serious further as the influence of thermograde concerning composite member (two-layer even three layers of test specimen).
Summary of the invention
Technical matters to be solved by this invention provides a kind of rut test piece temperature gradient emulation apparatus that can make the inner formation of test specimen along thickness continually varying temperature field.
In order to solve the problems of the technologies described above, rut test piece temperature gradient emulation apparatus provided by the invention, comprise die trial, sidewall in described die trial is provided with one deck thermal insulation material, described thermal insulation material is arranged between the sidewall and test specimen sidewall of described die trial, the inner bottom part of tank is provided with numerous evenly distributed and highly identical spacer bars, the side plate height is higher than described spacer bar height around the described tank, the inner chamber length and width of described tank are all greater than the length and width of described die trial, described die trial bottom is placed on the interior spacer bar of described tank, described tank one side is connected with inlet water tank, opposite side is connected with water tank, and described inlet water tank is provided with temperature survey and temperature regulating device.
Be connected with water circle device between described water tank and the described inlet water tank.
Adopt the rut test piece temperature simulation device of technique scheme, because rut test piece is shaped as the cube of rule, the present invention makes the inner formation temperature gradient of test specimen by the temperature of controlling test specimen surface, sidewall and bottom surface respectively.
Rut test piece surface temperature control method: test specimen must place in the rut case during because of wheel tracking test, and the rut instrument self is provided with temperature control system, can make and keep constant temperature in the rut case, and temperature can also be provided with arbitrarily, therefore, the present invention does not add processing on the test specimen surface, so just can guarantee that surface temperature and rut the temperature inside the box are synchronous.
Rut test piece side wall temperatures control method: test specimen is placed in the die trial during standard wheel tracking test, and die trial is a steel, because the steel good heat conductivity, when die trial was placed on the rut case, test specimen sidewall rut case environment temperature soon was identical.The present invention separates with heat-barrier material and punching block at the test specimen sidewall, is unlikely to pass to the test specimen sidewall with the temperature that guarantees punching block.
Rut test piece bottom temp control method: wheel tracking test is in order to estimate the high temperature stability performance of asphalt or bituminous pavement, generally at be the road surface actual conditions of summer high temperature, this time channel table temperature height reduces gradually toward next.For this reason, the present invention takes the method for circulator bath to reduce the temperature of die trial base plate, and the die trial base plate reduces the temperature of test specimen bottom again.Therefore, the present invention has designed a tank, and the die trial that test specimen is housed is placed in the tank, can guarantee that on the one hand the die trial bottom has recirculated water to flow, so just can reduce the die trial bottom temp and maintain the level of setting, can guarantee again that on the other hand the die trial bottom can normally carry.
In sum, the present invention is that a kind of test specimen inside that can make forms along thickness continually varying temperature field and simple in structure, with low cost, easily manufactured rut test piece temperature gradient emulation apparatus.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a tank three-dimensional plot of the present invention.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As depicted in figs. 1 and 2, sidewall in die trial 7 is provided with one deck thermal insulation material 4, the top of die trial 7 and bottom are not provided with the thermal insulation material, the inner bottom part of tank 6 is provided with numerous evenly distributed and highly identical spacer bars 5, the side plate height is higher than spacer bar 5 height around the tank 6, the inner chamber length and width of tank 6 are all greater than the length and width of die trial 7, die trial 7 bottoms are placed on the spacer bar 5 in the tank 6, tank 6 one sides are connected with inlet water tank 8, opposite side is connected with water tank 3, inlet water tank 8 is provided with temperature survey and temperature regulating device 1, is connected with water circle device 2 between water tank 3 and the inlet water tank 8.
As shown in Figure 1, after adding one deck thermal insulation material 4 between the sidewall of die trial 7 and the test specimen sidewall, die trial 7 is placed in the tank 6, the water inlet of tank 6 one sides, the opposite side water outlet, inlet water tank 8 is established temperature survey and temperature regulating device 1, the water of controlling well after the temperature flows into tanks 6 from inlet water tank 8, under die trial 7, flow through, flow into water tank 3 through water delivering orifice again, by water circle device 2 water of water tank 3 is extracted into inlet water tank 8 then, so formed recirculated water, and circulating water temperature can be provided with on demand and keep constant, like this certain hour after the baseplate temp of the die trial 7 of recirculated water cooling just can reduce and stablize for this reason.
As shown in Figure 2, tank 6 is longer than die trial 7, wide (test specimen is a cube than die trial 7, planar dimension 30cmx30cm, variable thickness 4-20cm), and the spacer bar 5 of numerous equal heights has been welded in the bottom of tank 6, like this, die trial 7 is shelved in the tank 6, and die trial 7 bottoms can be subjected to even support, and because the density that spacer bar 5 is provided with is bigger, the base plate load-bearing capacity of die trial 7 also is guaranteed, simultaneously, under the immersion of recirculated water, the baseplate temp of die trial 7 also can reduce and be controlled; In addition, side plate is highly also higher than spacer bar 5 around the tank 6, so just can guarantee that recirculated water fully contacts with the base plate of die trial 7, lower the temperature efficient and guarantee that the baseplate temp of die trial 7 keeps evenly of raising.
Claims (2)
1. rut test piece temperature gradient emulation apparatus, comprise die trial (7), it is characterized in that: the sidewall in described die trial (7) is provided with one deck thermal insulation material (4), described thermal insulation material (4) is arranged between the sidewall and test specimen sidewall of described die trial (7), the inner bottom part of tank (6) is provided with numerous evenly distributed and highly identical spacer bars (5), the side plate height is higher than described spacer bar (5) highly around the described tank (6), the inner chamber length and width of described tank (6) are all greater than the length and width of described die trial (7), the bottom of described die trial (7) is placed on the interior spacer bar (5) of described tank (6), described tank (6) one sides are connected with inlet water tank (8), opposite side is connected with water tank (3), and described inlet water tank (8) is provided with temperature survey and temperature regulating device (1).
2. rut test piece temperature gradient emulation apparatus according to claim 1 is characterized in that: be connected with water circle device (2) between described water tank (3) and the described inlet water tank (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100428742A CN101509854B (en) | 2009-03-17 | 2009-03-17 | Rut test piece temperature gradient emulation apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100428742A CN101509854B (en) | 2009-03-17 | 2009-03-17 | Rut test piece temperature gradient emulation apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101509854A CN101509854A (en) | 2009-08-19 |
| CN101509854B true CN101509854B (en) | 2010-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100428742A Expired - Fee Related CN101509854B (en) | 2009-03-17 | 2009-03-17 | Rut test piece temperature gradient emulation apparatus |
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| Country | Link |
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| CN (1) | CN101509854B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323300B (en) * | 2013-05-14 | 2015-08-19 | 山西省交通科学研究院 | A kind of die trial that can realize rut test piece bottom constant temperature |
| CN103323302A (en) * | 2013-05-16 | 2013-09-25 | 山西省交通科学研究院 | Heat insulation layer for realization of temperature gradient of rutting test specimen |
| CN105241749B (en) * | 2015-11-10 | 2019-02-12 | 昆山市交通工程试验检测中心有限公司 | A kind of modified asphalt mixture in track test device |
| CN105277454A (en) * | 2015-11-10 | 2016-01-27 | 昆山市交通工程试验检测中心 | Asphalt mixed material wheel tracking testing device |
| CN110095496B (en) * | 2019-05-31 | 2021-11-23 | 长安大学 | Comprehensive tester and method for testing salt expansion and temperature expansion of semi-rigid base layer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5659140A (en) * | 1996-08-13 | 1997-08-19 | Pavement Technology, Inc. | Testing machine for pavement samples |
| CN201045608Y (en) * | 2007-06-05 | 2008-04-09 | 西安公路养护技术工程研究中心有限公司 | Heavy duty slope asphalt mixture rut tester |
| CN101226187A (en) * | 2008-02-03 | 2008-07-23 | 山东大学 | Simulation test testing device for asphalt concrete pavement water destruct |
| CN101281190A (en) * | 2008-04-25 | 2008-10-08 | 长安大学 | Multifunctional wheel rutting test |
-
2009
- 2009-03-17 CN CN2009100428742A patent/CN101509854B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5659140A (en) * | 1996-08-13 | 1997-08-19 | Pavement Technology, Inc. | Testing machine for pavement samples |
| CN201045608Y (en) * | 2007-06-05 | 2008-04-09 | 西安公路养护技术工程研究中心有限公司 | Heavy duty slope asphalt mixture rut tester |
| CN101226187A (en) * | 2008-02-03 | 2008-07-23 | 山东大学 | Simulation test testing device for asphalt concrete pavement water destruct |
| CN101281190A (en) * | 2008-04-25 | 2008-10-08 | 长安大学 | Multifunctional wheel rutting test |
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| CN101509854A (en) | 2009-08-19 |
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Granted publication date: 20101208 Termination date: 20120317 |