CN103323300B - A kind of die trial that can realize rut test piece bottom constant temperature - Google Patents
A kind of die trial that can realize rut test piece bottom constant temperature Download PDFInfo
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- CN103323300B CN103323300B CN201310174725.8A CN201310174725A CN103323300B CN 103323300 B CN103323300 B CN 103323300B CN 201310174725 A CN201310174725 A CN 201310174725A CN 103323300 B CN103323300 B CN 103323300B
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- die trial
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- control bed
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Abstract
The invention discloses a kind of die trial that can realize rut test piece bottom constant temperature, comprise temperature control bed die, seal cover board (3), die trial side plate (1), according to order arrangement from the bottom to top; Threaded hole (14) the position one_to_one corresponding of the via hole (12) of temperature control bed die, the via hole (13) of seal cover board (3), die trial side plate (1) is supporting, is fixedly connected with by socket head cap screw; In temperature control bed die, the composition such as constant temperature water channel (5) waterpipe loop.The present invention is very effective for control rut test piece bottom constant temperature, and the design of die trial has obvious technical advantage: can realize the accurate temperature controlling to rut test piece bottom surface; Thermostatical circulating water is in enclosed environment, does not affect the temperature of environmental cabinet; Ensure the homogeneity of sample sub-layer; Keep the integraty that die trial is good, do not affect rut test piece shaping, structure is simple, with low cost, easy to make.
Description
Technical field
The invention belongs to the shop experiment Instrument technology field that Asphalt Pavement Performance is evaluated, be specifically related to a kind of die trial that can realize rut test piece bottom constant temperature, to provide a kind of technical scheme for realizing the rut test piece bottom constant temperature design that asphalt pavement structure anti-rut behavior evaluation test Asphalt Mixture test piece temperature gradient realizes.
Background technology
China's rapid development of economy, drive the magnitude of traffic flow to increase significantly, the traffic channelization of highway, Class I highway, the situation of overload heavy duty grows in intensity, in addition summer rare lasting high temperature, rut problem become affect highway in China develop in a healthy way outstanding problem.
The existence of rut seriously have impact on the flatness on road surface, makes wheel path asphalt thickness thinning, reduces the bulk strength of surface layer and pavement structure, also causes other pavement destruction such as crack, hole groove thus further; There is the section of larger rut groove, can cause rainy day time channel table impeded drainage, the anti-slide performance on road surface is declined, vehicle direction when overtaking other vehicles or change track is difficult to control, and have impact on the stability of trailer reversing; Due to the existence of ponding, vehicle is easy to generation drift and slides and affect the safety of high speed traveling.In addition, cold district rut groove can cover by ice and snow, also make the anti-slide performance on road surface reduce, serious threat traffic safety, and the existence of rut shortens the serviceable life on road surface, reduces the service quality of road.Therefore, the rut situation of correct evaluation bituminous pavement is for effectively control rut disease is significant.
For this reason, propose in China's " highway engineering pitch and Asphalt Mixture Experiment code " to adopt asphalt mixture in track test to evaluate the anti-rut behavior of asphalt.In test by test specimen together with die trial, be placed in the constant temperature enclosure reaching test temperature 60 DEG C ± 1 DEG C, insulation be not less than 5h, also must not more than 12h.This is that the temperature of entirety in order to ensure rut test piece all remains on 60 DEG C ± 1 DEG C.But there is very large difference in the actual temperature of this and bituminous pavement.Actual asphalt pavement structure continues the combined action that undergo various environmental factor, is presented as the distribution of pavement temperature field in the result set of this effect.
When the specimen thickness of wheel tracking test is 5cm, the impact of difference on wheel tracking test result of test temperature condition and pavement temperature field is less.But when the specimen thickness of wheel tracking test is 10cm or 15cm, this species diversity will be amplified the impact of wheel tracking test result, and cannot ignore.And to realize rut test piece temperature gradient be by controlling surface of test piece respectively, the temperature of sidewall and bottom surface realizes.
More existing researchs realize rut test piece bottom constant temperature like this.Be placed on bottom die trial in the tank of connection circulator bath, the inner bottom part of tank arranges numerous evenly distributed and highly identical spacer bar, and die trial is just supported on these reinforcing bars.Four cycle side plate height of tank are higher than described spacer bar height, and the height of tank middle water level is a little more than bottom die trial.The thermostatic control bottom test specimen can be realized by the water temperature controlling circulator bath in tank.
But there are some defects in this rut test piece bottom constant temperature method for designing: one is the environment that water in tank is present in an opening, and the environmental cabinet temperature of wheel tracking test and the temperature of circulator bath can influence each other.Two is that die trial is placed on spacer bar, is difficult to ensure even support.Three is that the height of recirculated water in tank is higher than test specimen bottom surface, what such test specimen contacted with water is not only bottom surface, in the certain limit of distance die trial bottom surface, the test specimen of (3mm or 5mm or other) all remains the temperature identical with recirculated water, this is only the original intention that will control test specimen bottom surface temperature from us is different, also there is larger difference with the Temperature Distribution on actual road surface.
Summary of the invention
The present invention is exactly that the temperature of environmental cabinet temperature and circulator bath in order to solve wheel tracking test can influence each other, die trial is placed on spacer bar and is difficult to ensure even support, test specimen in the certain limit of distance die trial bottom surface all remains the problems such as the temperature identical with recirculated water, thus a kind of die trial that can realize rut test piece bottom constant temperature is proposed, to provide a kind of technical scheme for realizing the rut test piece bottom constant temperature design that asphalt pavement structure anti-rut behavior evaluation test Asphalt Mixture test piece temperature gradient realizes, reach rut die trial and there is good integraty, test specimen bottom constant temperature can be controlled, facilitate easy-to-use object.
Technical scheme of the present invention:
A die trial for rut test piece bottom constant temperature can be realized, comprise temperature control bed die, seal cover board, die trial side plate, be followed successively by from the bottom to top, temperature control bed die, seal cover board, die trial side plate;
Temperature control bed die, is made up of steel plate, O-ring seal, constant temperature water channel, fixed orifice, water delivering orifice, rising pipe, thermostatic equipment, water inlet pipe, water inlet; The xsect of its light plate, for the length of side is slightly larger than the square of 30cm; Constant temperature water channel is positioned on steel plate, forms a waterpipe loop with water delivering orifice, rising pipe, thermostatic equipment, water inlet pipe, water inlet; Prevent thermostatted water from overflowing the O-ring seal of temperature control bed die, be positioned at around temperature control bed die adjacent edges, constant temperature water channel;
Seal cover board is the sheet steel that a 5mm equal with the temperature control bed die length of side is thick;
Die trial side plate, its xsect is " returning " font, and inner side is the square of length of side 30cm, outside be equal with temperature control bed die, the seal cover board length of side, slightly larger than the square of 30cm; The height of die trial side plate is 4 ~ 10cm; Four limits of die trial side plate are demountable part, are fixedly connected with by the side direction screw on four angles; Die trial side plate both sides are provided with die trial handle;
Between temperature control bed die edge and O-ring seal, be provided with the via hole of more than 2; Seal cover board adjacent edges, is provided with the via hole of more than 2; Die trial side plate bottom surface periphery, is provided with the threaded hole of more than 2; The threaded hole position one_to_one corresponding of the via hole of temperature control bed die, the via hole of seal cover board, die trial side plate is supporting, is fixedly connected with by socket head cap screw.
Beneficial effect of the present invention:
The present invention is very effective for control rut test piece bottom constant temperature, and the design of die trial has obvious technical advantage, is embodied in the following aspects:
1. the thermostatical circulating water in temperature control bed die, by heat transfer to seal cover board, affects the bottom surface temperature of rut test piece, can realize the accurate temperature controlling to rut test piece bottom surface in this process;
2. the thermostatical circulating water in temperature control bed die, is in a closed environment, can not affects the temperature of environmental cabinet;
3. sample is directly placed on seal cover board, ensure that the homogeneity of sample sub-layer;
4. die trial is on the basis realizing bottom constant temperature, maintains the integraty that die trial is good, does not affect rut test piece shaping, and structure is simple, with low cost, easy to make.
Accompanying drawing explanation
Fig. 1 is the floor map of temperature control bed die;
Fig. 2 is the floor map of seal cover board;
Fig. 3 is the floor map of die trial side plate bottom surface;
Fig. 4 is the floor map of die trial side plate upper surface;
Fig. 5 is structural representation of the present invention, also can be used as most preferred embodiment of the present invention;
Fig. 6 is combination schematic diagram of the present invention.
Accompanying drawing respectively marks and represents respectively:
1-die trial side plate
2-die trial handle
3-seal cover board
4-O-ring seal
5-constant temperature water channel
6-fixed orifice
7-water delivering orifice
8-rising pipe
9-thermostatic equipment
10-water inlet pipe
11-water inlet
12-via hole (on temperature control bed die)
13-via hole (on seal cover board)
14-threaded hole (on die trial side plate bottom surface).
Embodiment
A die trial for rut test piece bottom constant temperature can be realized, comprise temperature control bed die, seal cover board, die trial side plate, be followed successively by from the bottom to top, temperature control bed die, seal cover board, die trial side plate;
Temperature control bed die, is made up of steel plate, O-ring seal, constant temperature water channel, fixed orifice, water delivering orifice, rising pipe, thermostatic equipment, water inlet pipe, water inlet; The xsect of its light plate, for the length of side is slightly larger than the square of 30cm; Constant temperature water channel is positioned on steel plate, forms a waterpipe loop with water delivering orifice, rising pipe, thermostatic equipment, water inlet pipe, water inlet; Prevent thermostatted water from overflowing the O-ring seal of temperature control bed die, be positioned at around temperature control bed die adjacent edges, constant temperature water channel;
Seal cover board is the sheet steel that a 5mm equal with the temperature control bed die length of side is thick;
Die trial side plate, its xsect is " returning " font, and inner side is the square of length of side 30cm, outside be equal with temperature control bed die, the seal cover board length of side, slightly larger than the square of 30cm; The height of die trial side plate is 4 ~ 10cm; Four limits of die trial side plate are demountable part, are fixedly connected with by the side direction screw on four angles; Die trial side plate both sides are provided with die trial handle;
Between temperature control bed die edge and O-ring seal, be provided with the via hole of more than 2; Seal cover board adjacent edges, is provided with the via hole of more than 2; Die trial side plate bottom surface periphery, is provided with the threaded hole of more than 2; The threaded hole position one_to_one corresponding of the via hole of temperature control bed die, the via hole of seal cover board, die trial side plate is supporting, is fixedly connected with by socket head cap screw.
Below in conjunction with accompanying drawing, workflow of the present invention is further described.
The present invention is achieved in that and arranges temperature control bed die (see figure 1) at die trial bottommost, it is arranged seal cover board (see figure 2), then arranges die trial side plate (see Fig. 3 and Fig. 4) above.Their array mode be temperature control bed die, seal cover board, die trial side plate from the bottom to top, structure and array mode are shown in Fig. 5 and Fig. 6.
Temperature control bed die realizes temperature controlled core, and plane is the square of the length of side slightly larger than 30cm, as shown in Figure 4.It is by arranging constant temperature water channel on steel plate, and is connected with water inlet pipe, water inlet, water delivering orifice, rising pipe by constant temperature water channel.Constant temperature water bath equipment is set between water inlet pipe and rising pipe, to ensure the constant temperature of temperature control bed die.In order to prevent thermostatted water from overflowing temperature control bed die, be provided with O-ring seal.In order to be connected with the seal cover board that it is arranged and die trial side plate by temperature control bed die, be provided with via hole.
Seal cover board is the thick sheet steel of a 5mm equal with the temperature control bed die length of side, as shown in Figure 2.In order to be connected with the die trial side plate on the temperature control bed die under it and its by seal cover board, surrounding is provided with via hole, and position is corresponding with the mistake hole site on temperature control bed die.The Main Function of seal cover board has 3 aspects: one is in order to sealing temperature controlled bed die, prevents the water seepage flow in temperature control bed die in constant temperature water channel outside to die trial, affects the operation of plant equipment; Two is in order to the wheel tracking test sample to making on it provides even support; Three is to rut test piece by the temperature conduction of recirculated water.
Die trial side plate is the shape in order to mould rut test piece, from floor map Fig. 3 and Fig. 4, is the square of length of side 30cm inside it, and outside is and temperature control bed die, seal cover board external edge appearance etc., slightly larger than the square of 30cm.From perspective view Fig. 5, the height of die trial side plate can be determined according to test, is generally 4 ~ 10cm.Conveniently use, both sides are provided with die trial handle.In order to be connected with the seal cover board under it and temperature control bed die by die trial side plate, die trial side plate bottom surface periphery is provided with threaded hole, position is corresponding with the mistake hole site on seal cover board.It should be noted that in addition, four limits of die trial side plate are fixing by the side direction screw on four angles, and four limits are demountable.
Temperature control bed die, seal cover board, die trial side plate are according to order from the bottom to top, use the screw of interior hexagonal through the via hole of temperature control bed die, the via hole of seal cover board, be fixed in the threaded hole of die trial side plate bottom surface (see figure 3), thus form the die trial that can realize rut test piece bottom constant temperature of integration.Temperature control bed die controls the temperature of recirculated water in wherein constant temperature water channel by the constant temperature oven connected, and temperature conduction is affected the temperature of rut test piece bottom surface to seal cover board by recirculated water.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (1)
1. can realize a die trial for rut test piece bottom constant temperature, comprise temperature control bed die, seal cover board (3), die trial side plate (1), it is characterized in that,
Be followed successively by from the bottom to top, temperature control bed die, seal cover board (3), die trial side plate (1);
Temperature control bed die, is made up of steel plate, O-ring seal (4), constant temperature water channel (5), fixed orifice (6), water delivering orifice (7), rising pipe (8), thermostatic equipment (9), water inlet pipe (10), water inlet (11); The xsect of its light plate, for the length of side is slightly larger than the square of 30cm; Constant temperature water channel (5) is positioned on steel plate, forms a waterpipe loop with water delivering orifice (7), rising pipe (8), thermostatic equipment (9), water inlet pipe (10), water inlet (11); Prevent thermostatted water from overflowing the O-ring seal (4) of temperature control bed die, be positioned at temperature control bed die adjacent edges, constant temperature water channel (5) around;
Seal cover board (3) is the sheet steel that a 5mm equal with the temperature control bed die length of side is thick;
Die trial side plate (1), its xsect is " returning " font, and inner side is the square of length of side 30cm, outside be equal with temperature control bed die, seal cover board (3) length of side, slightly larger than the square of 30cm; The height of die trial side plate (1) is 4 ~ 10cm; Four limits of die trial side plate (1) are demountable part, are fixedly connected with by the side direction screw on four angles; Die trial side plate (1) both sides are provided with die trial handle (2);
Between temperature control bed die edge and O-ring seal (4), be provided with the via hole (12) of more than 2; Seal cover board (3) adjacent edges, is provided with the via hole (13) of more than 2; Die trial side plate (1) bottom surface periphery, is provided with the threaded hole (14) of more than 2; Threaded hole (14) the position one_to_one corresponding of the via hole (12) of temperature control bed die, the via hole (13) of seal cover board (3), die trial side plate (1) is supporting, is fixedly connected with by socket head cap screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310174725.8A CN103323300B (en) | 2013-05-14 | 2013-05-14 | A kind of die trial that can realize rut test piece bottom constant temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310174725.8A CN103323300B (en) | 2013-05-14 | 2013-05-14 | A kind of die trial that can realize rut test piece bottom constant temperature |
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| Publication Number | Publication Date |
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| CN103323300A CN103323300A (en) | 2013-09-25 |
| CN103323300B true CN103323300B (en) | 2015-08-19 |
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| CN201310174725.8A Expired - Fee Related CN103323300B (en) | 2013-05-14 | 2013-05-14 | A kind of die trial that can realize rut test piece bottom constant temperature |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104819537B (en) * | 2015-05-14 | 2017-10-17 | 北京鸿远通达科技有限公司 | A kind of thermoregulating system for environmental chamber |
| CN105784546B (en) * | 2016-04-30 | 2019-02-26 | 山西省交通科学研究院 | A kind of steep slope road section asphalt roller compaction process flow behavior indoor test device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101509854A (en) * | 2009-03-17 | 2009-08-19 | 长沙理工大学 | Rut test piece temperature gradient emulation apparatus |
| CN202614701U (en) * | 2012-06-15 | 2012-12-19 | 广东省宜华木业股份有限公司 | Geothermal floor test device |
| CN103091179A (en) * | 2013-01-10 | 2013-05-08 | 长安大学 | Interlamination shear-resisting track test mould of large longitudinal-slope asphalt pavement |
| CN203259400U (en) * | 2013-05-14 | 2013-10-30 | 山西省交通科学研究院 | Test die capable of realizing constant temperature bottom of wheel rut test specimen |
-
2013
- 2013-05-14 CN CN201310174725.8A patent/CN103323300B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101509854A (en) * | 2009-03-17 | 2009-08-19 | 长沙理工大学 | Rut test piece temperature gradient emulation apparatus |
| CN202614701U (en) * | 2012-06-15 | 2012-12-19 | 广东省宜华木业股份有限公司 | Geothermal floor test device |
| CN103091179A (en) * | 2013-01-10 | 2013-05-08 | 长安大学 | Interlamination shear-resisting track test mould of large longitudinal-slope asphalt pavement |
| CN203259400U (en) * | 2013-05-14 | 2013-10-30 | 山西省交通科学研究院 | Test die capable of realizing constant temperature bottom of wheel rut test specimen |
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| CN103323300A (en) | 2013-09-25 |
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