CN106323757A - Pouring asphalt concrete penetration test device - Google Patents
Pouring asphalt concrete penetration test device Download PDFInfo
- Publication number
- CN106323757A CN106323757A CN201610805442.2A CN201610805442A CN106323757A CN 106323757 A CN106323757 A CN 106323757A CN 201610805442 A CN201610805442 A CN 201610805442A CN 106323757 A CN106323757 A CN 106323757A
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- Prior art keywords
- asphalt concrete
- calorstat
- test specimen
- pouring asphalt
- test device
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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
- G01N3/14—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by dead weight, e.g. pendulum; generated by springs tension
-
- 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
- G01N3/02—Details
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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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a pouring asphalt concrete penetration test device and aims to enable the penetration test device to simulate shear damages of a pavement structure to the greatest extent and avoid measurement result accuracy influences caused by tensile fractures. The penetration test device comprises a bottom plate, a supporting frame, a constant-temperature chamber, a test specimen platform, a penetration rod, a bearing platform, load weights and a displacement detection device. The constant-temperature chamber is arranged on the bottom plate, a test specimen is placed on the surface of the test specimen platform which is arranged in the constant-temperature chamber, the middle of the top wall of the constant-temperature chamber is provided with a movable door, the supporting frame above the movable door is provided with a through hole vertically, the penetration rod is inserted into a round pipe which internally sleeves the through hole, one end of the penetration rod extends into the constant-temperature chamber, and the bearing platform is connected with the end face of the other end of the penetration rod. The pouring asphalt concrete penetration test device has advantages that by increase of test specimen size and change from constant-temperature water bath to the constant-temperature chamber, an unconfined test of the pouring asphalt concrete test specimen is realized, and tensile fractures are avoided.
Description
Technical field
The present invention relates to a kind of pouring asphalt concrete penetration test improved device.
Background technology
Cast asphalt concrete refers to that at high operating temperatures (about 220 DEG C～260 DEG C) carry out mix, flows during mixture laying
Dynamic property is big, relies on the mobility of self to pave molding, need not roll, and Colophonium, breeze content are relatively big, voidage less than 1% one
Plant special asphalt mixture.Cast asphalt concrete is long at the applicating history of Germany, all the time mixture performance
Evaluation methodology only one of which, is also to cooperate with ratio laboratory test uniquely required when designing, here it is penetration test.Penetration test,
In order to evaluate the non-deformability of casting type asphaltic mixture, be at the specified temperature, in the stipulated time, at regulation dead load
Under, the degree of depth (displacement) of test rigidity depression bar injection bituminous concrete surface of test piece, in units of mm.The operation letter of this method
Single, easily to promote, experimental condition also can be adjusted according to needs, and therefore it has had become as countries in the world for evaluating cast
The basic skills of formula bituminous concrete high-temperature stability.
In terms of foreign applications, penetration test substantially various countries adopt, but all according to this country's feature to test method, to commenting
Valency index and standard are improved.Some country, by the research work of this country, proposes simultaneously and is suitable for supplementary commenting of this country
Valency index.At present, the penetration test instrument that China uses, the parameter of perforation device and international uniform, i.e. added load is 515.0 ±
9.8N, the depression bar plane contacted with test specimen is circle, and a size of Φ 25.2mm, i.e. area are 500mm2, then pressure is about 1MPa；
Loading times is 30min, and measures pile penetration increment when loading 60min；Temperature can be between 40 DEG C～60 DEG C, according to paving
Face design temperature determines, carries out temperature control by the mode of water bath with thermostatic control；Test specimen uses the cube of 70 × 70 × 70mm size
Test specimen, and use the test method having lateral spacing.But owing to paving structure there is no lateral spacing, therefore use and have lateral spacing test method and mat formation
Actual situation gap is relatively big, makes measured result the most conservative, easily has a negative impact paving structure design.Additionally, due to
The existence of water in thermostatic water tank, makes test specimen also different from paving structure local environment.Therefore, for making penetration test device try one's best mould
Intend the failure by shear of paving structure, it is to avoid the destruction of stretching occurs in test specimen, need to improve this assay device.
Summary of the invention
The invention aims to the failure by shear making penetration test device as far as possible simulate paving structure, it is to avoid pouring type
There is the destruction of stretching in bituminous concrete test specimen, affects the accuracy of measurement result, and provides a kind of pouring asphalt concrete
Penetration test device.
Pouring asphalt concrete penetration test device of the present invention comprises base plate, support, calorstat, test specimen platform, injection
Bar, bearing platform, loading counterweight and displacement detector, calorstat is placed in the middle part of base plate, is provided with test specimen and puts down in calorstat
Platform, is placed with pouring asphalt concrete test specimen on the surface of test specimen platform, has dodge gate, support in the middle part of the roof of calorstat
Being arranged on the top of calorstat, one end of support is fixed on base plate, has through hole on the support of the vertical direction of dodge gate,
It is arranged with the one end pipe with convex annular edge in through hole, in pipe, is provided with female thread, be inserted with injection bar in pipe, on injection bar
Being provided with the external screw thread matched with pipe female thread, one end of injection bar is stretched into inside calorstat, the other end of injection bar
Connecting on end face has bearing platform, loading counterweight to be placed on bearing platform, in injection path, and injection bar and pipe matched in clearance, pass through
Entering in bar injection pouring asphalt concrete test specimen the most vertically downward, displacement detector is fixed on injection bar
And be clipped between bearing platform and support.
Penetration test instrument improved device of the present invention is by strengthening specimen size and water bath with thermostatic control turning to calorstat
Become, and test specimen platform is plate shaped, is not provided with enclosing edge, it is achieved pouring asphalt concrete test specimen carries out unconfined test, and then
The failure by shear of paving structure can be simulated, it is to avoid tensile failure occurs, make the process of penetration test mat formation closer to actual,
And then the pouring asphalt concrete performance making configuration obtain improves.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of pouring asphalt concrete penetration test device of the present invention；
Fig. 2 is the structural representation within calorstat.
Detailed description of the invention
Detailed description of the invention one: present embodiment pouring asphalt concrete penetration test device comprise base plate 1, support 2,
Calorstat 3, test specimen platform 4, injection bar 6, bearing platform 7, loading counterweight 8 and displacement detector 9, calorstat 3 is placed on base plate 1
Middle part, is provided with test specimen platform 4 in calorstat 3, is placed with pouring asphalt concrete test specimen 5 on the surface of test specimen platform 4,
Having dodge gate 11 in the middle part of the roof of calorstat 3, support 2 is arranged on the top of calorstat 3, and one end of support 2 is fixed on base plate 1
On, the support 2 of the vertical direction of dodge gate 11 has through hole, in through hole, is arranged with the one end pipe with convex annular edge
12, it is provided with female thread in pipe 12, in pipe 12, is inserted with injection bar 6, injection bar 6 is provided with and matches with pipe 12 female thread
External screw thread, it is internal that calorstat 3 is stretched in one end of injection bar 6, and the end face of the other end of injection bar 6 connects bearing platform 7, lotus
Weight counterweight 8 is placed on bearing platform 7, and in injection path, injection bar 6 and pipe 12 matched in clearance, injection bar 6 is under gravity
Vertically downward in injection pouring asphalt concrete test specimen 5, displacement detector 9 is fixed on injection bar 6 and is clipped in bearing platform 7
And between support 2.
Calorstat described in present embodiment makes warm-up phase can cut out dodge gate by the setting of dodge gate on roof to make
Bituminous concrete is fully warmed-up, and in penetration process, injection bar can be put in thermostatic box by dodge gate, due to dodge gate relatively
Little, make heat be difficult to scatter and disappear, it is ensured that in process of the test, the temperature of test specimen keeps constant.
The present embodiment simulation actually located environment of paving structure, becomes big by bituminous concrete test specimen, become 100mm ×
The test specimen of 100mm × 50mm, removes die trial lateral spacing simultaneously, and is calorstat by water bath with thermostatic control improvement, make surveyed bituminous concrete
High-temperature behavior is the most accurate, so that its mixture ratio of asphalt concrete configured and performance thereof are more excellent.
Detailed description of the invention two: the displacement detector 9 that present embodiment is described unlike detailed description of the invention one
For displacement dial gauge.
The gauge head of present embodiment displacement dial gauge is against the upper surface of support.
Detailed description of the invention three: present embodiment tank wall of calorstat 3 unlike detailed description of the invention one or two is
Hollow structure, is provided with in tank wall and adds heat pipe.
The calorstat of present embodiment is heated by external 220V power supply.
Detailed description of the invention four: present embodiment adds heat pipe unlike detailed description of the invention three and uses U-shaped titanium alloy
Heat electrothermal tube.
The temperature regulating range of present embodiment electrothermal tube is 40～80 DEG C.
Detailed description of the invention five: present embodiment unlike one of detailed description of the invention one to four in calorstat 3
It is additionally provided with temperature sensor.
Temperature sensor described in present embodiment, the air themperature in main monitoring calorstat.In addition calorstat arranges super
High temperature protection system, if case indoor temperature is more than 90 DEG C, casing just automatically powers off, to prevent from causing danger.In process of the test, adopt
With 70 DEG C as test temperature, this temperature close with China road in bituminous paving summer table highest temperature.
Detailed description of the invention six: present embodiment unlike one of detailed description of the invention one to five at calorstat 3
Antetheca is provided with hatch door 15.
Present embodiment is easy to picking and placeing of pouring asphalt concrete sample by the setting of hatch door.
Detailed description of the invention seven: present embodiment test specimen platform 4 unlike one of detailed description of the invention one to six is
The flat rectangular plate of length × a width of 200mm × 200mm.
Present embodiment is made during specimen test without lateral spacing by the setting of sample stent flat board so that it is stress is more
Close to the shearing force suffered by paving structure, it is to avoid tensile failure occurs in test specimen.
Detailed description of the invention eight: in present embodiment test specimen platform 4 unlike one of detailed description of the invention one to seven
The region of minister × a width of 100mm × 100mm, its sideline coating is identified.
Present embodiment makes the position putting into sample accurate by sideline coating traffic sign placement, it is to avoid test error.
Embodiment one: the present embodiment pouring asphalt concrete penetration test device comprise base plate 1, support 2, calorstat 3,
Test specimen platform 4, injection bar 6, bearing platform 7, loading counterweight 8 and displacement detector 9 i.e. dial gauge, calorstat 3 is placed on base plate 1
Middle part, the antetheca of calorstat 3 is provided with hatch door 15, is provided with test specimen platform 4 in calorstat 3, puts on the surface of test specimen platform 4
Being equipped with pouring asphalt concrete test specimen 5, have dodge gate 11 in the middle part of the roof of calorstat 3, support 2 is arranged on calorstat 3
Top, one end of support 2 is fixed on base plate 1, has through hole, through hole inner sleeve on the support 2 of the vertical direction of dodge gate 11
It is provided with the one end pipe 12 with convex annular edge, in pipe 12, is provided with female thread, be inserted with injection bar 6 in pipe 12, on injection bar 6
It is provided with the external screw thread matched with pipe 12 female thread, in injection path, injection bar 6 and pipe 12 matched in clearance, injection
In bar 6 injection pouring asphalt concrete test specimen 5 the most vertically downward, one end of injection bar 6 is stretched in calorstat 3
Portion, the end face of the other end of injection bar 6 connects and has bearing platform 7, loading counterweight 8 to be placed on bearing platform 7, displacement detector 9
Being fixed on injection bar 6 and be clipped between bearing platform 7 and support 2, the gauge head of dial gauge is against the upper surface of support.
The present embodiment is the rectangular area of minister × a width of 100mm × 100mm in test specimen platform, and its sideline coating is carried out
Mark.Before injection, rotate injection bar, injection bar can be made slowly to decline, until the convex annular of pipe is along the top of arrival support,
Now, the bottom face of injection bar and the top of test specimen contact, and in penetration process, injection bar no longer contacts with between support,
In injection bar vertical injection test specimen under gravity.
In pouring asphalt concrete penetration test device described in the present embodiment, the length × width × height of base plate be 650mm ×
650mm×20mm；Support entirety is set a roof beam in place by level and vertical strutbeam forms inverted "L" shaped, and vertical strutbeam is perpendicular to base plate, level frame
Beam is parallel to base plate；The length × width × height of calorstat outside dimension is 350mm × 350mm × 200mm；The length of test specimen platform × wide ×
A height of 200mm × 200mm × 20mm；The length × width × height of pouring asphalt concrete test specimen is 100mm × 100mm × 50mm；
Injection bar bottom surface is smooth circular end face, its a diameter of 25.2mm；The length × width × height of bearing platform be 500mm × 500mm ×
20mm.Calorstat use U-shaped titanium alloy heat electrothermal tube heating, electrothermal tube is arranged in calorstat left and right side tank wall and perseverance
Bottom incubator, running voltage is 220V exchange.
The test method of the present embodiment application pouring asphalt concrete penetration test instrument improved device is as follows:
One, use special die trial, be poured into the bituminous concrete test specimen of test, sample is cooled down quiet by regulation
Support；
Two, test specimen being carried out the demoulding, markings are drawn in the centre making the side of sample be placed on sample mount as test surfaces
Region, opens calorstat hatch door, and test specimen platform is put into the position that calorstat is fixing；
Three, close hatch door, connect calorstat power supply, the temperature in calorstat is set, be incubated 60min；
Four, stretch to touching bituminous concrete surface of test piece under vertical for injection bar；
Five, putting down injection bar, start the watch starts timing simultaneously, and just adding load is 2.5kgf (24.5N), reads 10min
Time dial gauge reading (injection amount)；
Six, fixing injection bar, is adjusted to zero by dial gauge reading during 10min under this load, is not having the feelings of impulsive force
Under condition, the loading counterweight of 50kgf (480.5N) is placed on bearing platform, record 1min, 2min, 3min, 5min, 10min,
The reading (injection amount) of dial gauge when 20min, 30min and 60min；
Seven, close power supply, open calorstat hatch door, take out bituminous concrete sample, measurement result is analyzed.
The present embodiment realizes pouring asphalt concrete test specimen and carries out unconfined test, and then can simulate paving structure
Failure by shear, it is to avoid tensile failure occur, makes the process of penetration test mat formation closer to actual, improves the accurate of penetration test
Property.
Claims (8)
1. pouring asphalt concrete penetration test device, it is characterised in that this pouring asphalt concrete penetration test device bag
Containing base plate (1), support (2), calorstat (3), test specimen platform (4), injection bar (6), bearing platform (7), loading counterweight (8) and displacement
Detection device (9), calorstat (3) is placed on base plate (1) middle part, is provided with test specimen platform (4), at test specimen in calorstat (3)
The surface of platform (4) is placed with pouring asphalt concrete test specimen (5), has dodge gate (11) in the middle part of the roof of calorstat (3),
Support (2) is arranged on the top of calorstat (3), and one end of support (2) is fixed on base plate (1), vertical at dodge gate (11)
Having through hole on the support (2) of top, be arranged with the one end pipe (12) with convex annular edge in through hole, pipe is provided with in (12)
Female thread, is inserted with injection bar (6), injection bar (6) is provided with the outer spiral shell matched with pipe (12) female thread in pipe (12)
Stricture of vagina, it is internal that calorstat (3) is stretched in one end of injection bar (6), and the end face of the other end of injection bar (6) connects bearing platform (7),
Loading counterweight (8) is placed on bearing platform (7), in injection path, and injection bar (6) and pipe (12) matched in clearance, injection bar (6)
The most vertically downward in injection pouring asphalt concrete test specimen (5), displacement detector (9) is fixed on injection bar
(6) go up and be clipped between bearing platform (7) and support (2).
Pouring asphalt concrete penetration test device the most according to claim 1, it is characterised in that described displacement inspection
Surveying device (9) is displacement dial gauge.
Pouring asphalt concrete penetration test device the most according to claim 1, it is characterised in that the case of calorstat (3)
Wall is hollow structure, is provided with and adds heat pipe in tank wall.
Pouring asphalt concrete penetration test device the most according to claim 3, it is characterised in that add heat pipe and use U-shaped
Titanium alloy is heated electrothermal tube.
Pouring asphalt concrete penetration test device the most according to claim 1, it is characterised in that in calorstat (3)
It is additionally provided with temperature sensor.
Pouring asphalt concrete penetration test device the most according to claim 1, it is characterised in that at calorstat (3)
Antetheca is provided with hatch door (15).
Pouring asphalt concrete penetration test device the most according to claim 1, it is characterised in that test specimen platform (4) is
The flat rectangular plate of length × a width of 200mm × 200mm.
Pouring asphalt concrete penetration test device the most according to claim 1, it is characterised in that in test specimen platform (4)
The region of minister × a width of 100mm × 100mm, its sideline coating is identified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610805442.2A CN106323757A (en) | 2016-09-06 | 2016-09-06 | Pouring asphalt concrete penetration test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610805442.2A CN106323757A (en) | 2016-09-06 | 2016-09-06 | Pouring asphalt concrete penetration test device |
Publications (1)
| Publication Number | Publication Date |
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| CN106323757A true CN106323757A (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610805442.2A Pending CN106323757A (en) | 2016-09-06 | 2016-09-06 | Pouring asphalt concrete penetration test device |
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| CN (1) | CN106323757A (en) |
Cited By (3)
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| CN107121338A (en) * | 2017-06-21 | 2017-09-01 | 中冶沈勘工程技术有限公司 | A kind of variable cross-section CFG pile composite foundation static tests self-balancing combination unit and method |
| 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 |
| CN112816314A (en) * | 2020-09-09 | 2021-05-18 | 北京建筑大学 | PC-10 type polymer concrete penetration resistance test device and test method |
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| CN112816314A (en) * | 2020-09-09 | 2021-05-18 | 北京建筑大学 | PC-10 type polymer concrete penetration resistance test device and test method |
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