CN106525534A - Water-absorbing device for cold-recycling test of gyratory compactor and test method - Google Patents
Water-absorbing device for cold-recycling test of gyratory compactor and test method Download PDFInfo
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- CN106525534A CN106525534A CN201610996931.0A CN201610996931A CN106525534A CN 106525534 A CN106525534 A CN 106525534A CN 201610996931 A CN201610996931 A CN 201610996931A CN 106525534 A CN106525534 A CN 106525534A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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Abstract
The invention relates to a water-absorbing device for a cold-recycling test of a gyratory compactor and a test method and belongs to the technical field of traffic engineering. The water-absorbing device comprises a first disc and a second disc which are in same size, wherein the first disc and the second disc are in supporting connection with each other through a brace; the two ends of the brace are respectively connected with the circle centers of the first disc and the second disc; a water-absorbing filler fills the gap between the first disc and the second disc. The test method adopting the water-absorbing device comprises the following steps: measuring the total mass m0 of the water-absorbing device; horizontally putting the water-absorbing device onto a chassis in a gyratory compactor mold; putting a cold recycled asphalt mixture into the mold and putting the mold into a compacting chamber of the gyratory compactor; assembling a mold top cover; pressing a start button; after ending the test, de-molding a marshal piece in the mold; measuring the total mass m1 of the water-absorbing device; subtracting m0 from m1, thereby acquiring the seepage quantity in the test; adjusting the moisture content of the asphalt mixture according to the seepage quantity in the test; repeating the above steps till acquiring an ideal test piece.
Description
Technical field
The invention belongs to Communication and Transportation Engineering technical field, more particularly to a kind of to test for rotary compactor cold renewal
Water absorber and test method.
Background technology
According to highway maintenance department satisfy the need year by year surface evenness, intensity, damaged degree and coefficient of sliding resistance etc. maintenance evaluation refer to
Target evaluation result shows, the certain time limit of usual road occupation is accomplished by overhauling once, but with the growth of the volume of traffic so that
This time limit standard is reduced year by year, particularly the increase of Heavy Traffic in recent years, even more accelerates the damage on road surface.Therefore, road
Facestock material regeneration techniques is also developed rapidly therewith.Pavement recycling technology is all and the and hot recycling based on hot recycling all the time
Compare, cold recycling technology has under room temperature to be carried out, the low various advantages of cost, is increasingly taken seriously in recent years, thus with it is cold
The related test species of regeneration is consequently increased, and the use of rotary compactor molding cold renewal marshal piece is exactly one of them.
Rotary compactor is used for being compacted test specimen, can accurate simulated field compaction state, the closely knit feature of evaluation asphalt,
For the design of asphalt, quality control and assurance.But the rotary compactor that laboratory is used now is mainly
For doing hot material test, occur some problems, for example, using cold recycled asphalt when cold burden correlation test being carried out using which
When compound is tested, in compound, the content of water is very important, and which is mainly by the water in outer water mixing, emulsified asphalt and again
Water in raw asphalt is constituted, and these water are had part water and oozed out when testing using rotary compactor.When oozing out
The amount of water is more, it is impossible to which, when being fully absorbed by the supporting absorbent paper of experimental apparatus, unabsorbed water seepage is inevitably
The performance of experimental apparatus is produced to be affected even experimental apparatus to be caused to damage, and this allows for testing crew for Protection instrument
Device, and the test of the cold recycled asphalt mixture of different moisture content cannot be carried out.If the new equipment of this buying, then can cause volume
Outer input, increases cost.For this reason, it may be necessary to a kind of new construction being improved for existing rotary compactor is above-mentioned to solve
Problem.
The content of the invention
For the problem that prior art is present, the present invention provides a kind of water suction dress for the test of rotary compactor cold renewal
Put and test method, the water absorber can effectively absorb the water seepage in cold recycled asphalt mixture, prevent from oozing out Water Damage reality
Instrument, and simple structure is tested, it is easy to use, it is with low cost, destruction will not be produced to existing instrument and equipment.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of water absorber for the test of rotary compactor cold renewal, including the first equivalently-sized disk and the second circle
Disk, first disk are supported by pillar with the second disk and are connected, and the two ends of the pillar connect the first disk respectively
With the center of circle of the second disk, water suction implant between first disk and the second disk, is filled with.
The pillar and the first disk and the second disk adopt integral cast molding.
The pillar and the first disk and the second disk are stainless steel.
Internal diameter of the diameter of first disk less than rotary compactor mould.
Diameter of the external diameter of the water suction implant more than first disk.
The water suction implant is using split type.
The water suction implant adopts bibulous polyvinyl alcohol absorbent cotton.
Following step is included using a kind of test method of the water absorber for the test of rotary compactor cold renewal of the present invention
Suddenly：
Step one：Gross mass m of measurement water absorber0；
Step 2：Water absorber level is placed on the chassis in rotary compactor mould；
Step 3：Ready cold recycled asphalt mixture is put in mould, and mould is put into into rotary compactor
Compacting intracavity, and the mould is fixed with the fixture for being compacted intracavity, close compacting chamber door；
Step 4：Installation mold top cover, and be locked, prepare test；
Step 5：Start button is pressed, starts test；
Step 6：Off-test, opens the mould top cover, by the marshal piece demoulding in mould, obtains Marshall
Test specimen；
Step 7：Take out water absorber, gross mass m of the water absorber after experiment with measuring1；
Step 8：The m for obtaining will be measured in step 71With measure the m that obtains in step one0Make the difference, oozing in being tested
The water yield, and then by calculating the moisture content for obtaining cold recycled asphalt mixture；
Step 9：According to the water percolating capacity in process of the test, the moisture content of cold recycled asphalt mixture is adjusted, afterwards, repeated
Step one and records containing for the cold recycled asphalt mixture for making the test specimen to step 8 until obtaining the test specimen of perfect condition
Water rate.
Beneficial effects of the present invention：
The present invention has supplied a kind of water absorber for the test of rotary compactor cold renewal and test method, using rotation
When compactor carries out cold renewal test, compound has water during gyratory compaction and oozes out, and water seepage passes through mould inner wall
Gap between water absorber is oozed out, and effectively absorbed by the water suction implant filled in water absorber, it is to avoid water seepage
From the damage that the gap on mould chassis is oozed out and caused to test apparatuses.And the water absorber mechanism is simple, easy to use, cost
It is cheap, original construction of instrument need not be changed.And when being tested using the water absorber, can be by absorbing water before and after test
The change of installation weight tested in water percolating capacity, and then more can accurately calculate the used cold renewal drip of test
The moisture content of blue or green compound.
Description of the drawings
Fig. 1 is that the present invention is shown with the structure of rotary compactor mould for the water absorber of rotary compactor cold renewal test
It is intended to；
Fig. 2 is structural representation of the present invention for the water absorber of rotary compactor cold renewal test；
Fig. 3 is the A-A sectional views of Fig. 2；
Fig. 4 is the B-B sectional views of Fig. 2；
In figure：The first disks of 1-, the second disks of 2-, 3- pillars, 4- water suction implants, 5- moulds, 6- chassis.
Specific embodiment
Below in conjunction with the accompanying drawings by taking American-European the earth AFG2C type rotary compactors as an example, the present invention is done further specifically
It is bright.
As shown in Figures 1 to 4, a kind of water absorber for the test of rotary compactor cold renewal, belongs to transportation work
Journey technical field, for when cold renewal test is carried out using rotary compactor, absorbing oozing out in cold recycled asphalt mixture
Water, prevents from oozing out Water Damage experimental apparatus.
Include the first equivalently-sized disk 1 provided by the present invention for the water absorber of rotary compactor cold renewal test
With the second disk 2, because water absorber need to be positioned in the mould 5 of rotary compactor, the diameter of the first disk 1 is less than rotation
Turn the internal diameter of compactor mould 5, in the present embodiment, a diameter of 100mm of the first disk 1, thickness is 5mm, in other enforcements
In example, the diameter of the first disk 1 can be selected according to the internal diameter size of concrete mould 5, only need to be slightly less than 5 internal diameter of mould.
First disk 1 is supported by pillar 3 with the second disk 2 and is connected, and the size of pillar 3 is higher, and absorb water implant 3
Height it is also higher, it is also better to the assimilation effect of water seepage, but during due to being tested on rotary compactor, the water suction
Device can together bear the effect of moment of torsion with test specimen, therefore, if the size of pillar 3 is too high, in the case where moment of torsion effect is born
It is also easier to damage, reduces service life, therefore, in the present embodiment, a diameter of 20mm of pillar 3 is highly 10mm.Pillar
3 two ends connect the center of circle of the first disk 1 and the second disk 2 respectively, to ensure that water absorber stress in use is put down
Weighing apparatus.
In the present embodiment, pillar 3 and the first disk 1 and the second disk 2 adopt integral cast molding, to improve water suction
The use intensity of device, it is to avoid stress concentration causes to damage to water absorber during use, and as water absorber Jing often exists
Used in aqueous environment, therefore pillar 3 and the first disk 1 and the second disk 2 adopt stainless steel, such that it is able to ensure
On the premise of water absorber use intensity, antirust and the resistance to corrosion of water absorber are improved again.
Filled with water suction implant 4 between first disk 1 and the second disk 2, water suction implant 4 can be circulated in test
Reusability, for the absorbent paper used in test at present, which is more environmentally-friendly.Preferably absorb water in test for reaching
Effect, prevents water to be exuded on test apparatuses, absorb water implant 4 external diameter more than the first disk 1 diameter, such that it is able to mould
The inwall of tool 5 is in close contact.Due to 4 soft texture of implant that absorbs water, therefore 5 inwall of mould of rotary compactor will not be caused
Any damage, and during the marshal piece demoulding, water absorber is together moved with marshal piece, absorb water implant 4
Test specimen in process of the test can be remained in the moisture on 5 inwall of mould to absorb again, make cold recycled asphalt mixture moisture content
Measuring and calculating is more accurate.In the present embodiment, the external diameter of the implant 4 that absorbs water is 101mm, and internal diameter is 20mm, is highly 10mm, its material
Matter is using the stronger polyvinyl alcohol absorbent cotton of water absorption.For making installation and changing convenient, water suction implant 4 adopts split
Formula, in the present embodiment, uses two halves formula and is symmetrically installed.
The present invention also provides a kind of test method using the above-mentioned water absorber for the test of rotary compactor cold renewal,
By taking American-European the earth AFG2C type rotary compactors as an example, comprise the steps：
Step one：Cleaning rotary compactor mould, prepares cold recycled asphalt mixture needed for test；
Step 2：Gross mass m of measurement water absorber0；
Step 3：On the chassis 6 that water absorber level is placed in rotary compactor mould 5, the first disk 1 and mould
5 inwall leaves gap, and water suction implant 4 is in close contact with 5 inwall of mould；
Step 4：Ready cold recycled asphalt mixture is put in mould 5, rotary compactor is playbacked, and by mould
The compacting intracavity that tool 5 is put into rotary compactor, it is ensured that mould 5 places pilot pin that is steady and withstanding compacting intracavity, and with being compacted
The fixture of intracavity fixes to clamp mould 5 on rotating base, closes compacting chamber door；
Step 5：Installation mold top cover, mould top cover is turned clockwise in place, until mould top cover sinks completely and pushes up
Bolt in place, and mould top cover is locked with clamp lever, prepare test；
Step 6：Setting test parameterss, press start button, start test；
Step 7：Off-test, opens mould top cover, by the marshal piece demoulding in mould 5, obtains Marshall examination
Part；
Step 8：Take out water absorber, gross mass m of the water absorber after experiment with measuring1；
Step 9：The m for obtaining will be measured in step 81With measure the m that obtains in step 20Make the difference, oozing in being tested
The water yield, and then by calculating the moisture content for obtaining cold recycled asphalt mixture；
Step 10：According to the water percolating capacity in process of the test, the moisture content of cold recycled asphalt mixture is adjusted, afterwards, repeated
Step one and records containing for the cold recycled asphalt mixture for making the test specimen to step 9 until obtaining the test specimen of perfect condition
Water rate.When repeating to test, ooze out and equipment is caused to damage for guaranteeing not have water, it is proposed that change dry water suction implant
4 are tested, and the water suction implant 4 for changing can be continuing with after carrying out cleaning, being dried.
Step 11：Experimental facilitiess are arranged, and used water suction implant 4 is dried into process, be easy to next examination
Used in testing.
Above example is only unrestricted to illustrate technical scheme, although with reference to preferred embodiment to this
It is bright to be described in detail, it will be appreciated by those skilled in the art that can modify to technical scheme or wait
With replacing, without deviating from the objective and scope of the technical program, which all should be covered in scope of the presently claimed invention.
Claims (8)
1. it is a kind of for rotary compactor cold renewal test water absorber, it is characterised in that include：The first equivalently-sized circle
Disk and the second disk, first disk are supported by pillar with the second disk and are connected, and the two ends of the pillar connect respectively
The center of circle of the first disk and the second disk is connect, filled with water suction implant between first disk and the second disk.
2. it is according to claim 1 for rotary compactor cold renewal test water absorber, it is characterised in that：Described
Post and the first disk and the second disk adopt integral cast molding.
3. it is according to claim 1 for rotary compactor cold renewal test water absorber, it is characterised in that：Described
Post and the first disk and the second disk are stainless steel.
4. it is according to claim 1 for rotary compactor cold renewal test water absorber, it is characterised in that：Described
Internal diameter of the diameter of one disk less than rotary compactor mould.
5. it is according to claim 1 for rotary compactor cold renewal test water absorber, it is characterised in that：The suction
Diameter of the external diameter of water implant more than first disk.
6. it is according to claim 1 for rotary compactor cold renewal test water absorber, it is characterised in that：The suction
Water implant is using split type.
7. it is according to claim 1 for rotary compactor cold renewal test water absorber, it is characterised in that：The suction
Water implant adopts bibulous polyvinyl alcohol absorbent cotton.
8. using the test method of the water absorber for the test of rotary compactor cold renewal described in claim 1, its feature
It is to comprise the steps：
Step one：Gross mass m of measurement water absorber0；
Step 2：Water absorber level is placed on the chassis in rotary compactor mould；
Step 3：Ready cold recycled asphalt mixture is put in mould, and mould is put into the compacting of rotary compactor
Intracavity, and the mould is fixed with the fixture for being compacted intracavity, close compacting chamber door；
Step 4：Installation mold top cover, and be locked, prepare test；
Step 5：Start button is pressed, starts test；
Step 6：Off-test, opens the mould top cover, by the marshal piece demoulding in mould, obtains marshal piece；
Step 7：Take out water absorber, gross mass m of the water absorber after experiment with measuring1；
Step 8：The m for obtaining will be measured in step 71With measure the m that obtains in step one0Make the difference, the infiltration in being tested
Amount, and then by calculating the moisture content for obtaining cold recycled asphalt mixture；
Step 9：According to the water percolating capacity in process of the test, the moisture content of cold recycled asphalt mixture, afterwards, repeat step is adjusted
One to step 8, until obtaining the test specimen of perfect condition, and records the moisture content of the cold recycled asphalt mixture for making the test specimen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610996931.0A CN106525534B (en) | 2016-11-11 | 2016-11-11 | A kind of water absorber and test method for the test of rotary compactor cold renewal |
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| CN201610996931.0A CN106525534B (en) | 2016-11-11 | 2016-11-11 | A kind of water absorber and test method for the test of rotary compactor cold renewal |
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| CN106525534B CN106525534B (en) | 2019-06-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655713A (en) * | 2017-09-22 | 2018-02-02 | 成都南红鞋业有限公司 | Suitable for the sampling mechanism of fibrous material water imbibition detection |
| CN107655714A (en) * | 2017-09-22 | 2018-02-02 | 成都南红鞋业有限公司 | For detecting the sampling apparatus of fibrous material water imbibition |
| CN112834369A (en) * | 2020-12-30 | 2021-05-25 | 江西省交通科学研究院 | Method for determining reasonable water content of solid waste doped road base material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655713A (en) * | 2017-09-22 | 2018-02-02 | 成都南红鞋业有限公司 | Suitable for the sampling mechanism of fibrous material water imbibition detection |
| CN107655714A (en) * | 2017-09-22 | 2018-02-02 | 成都南红鞋业有限公司 | For detecting the sampling apparatus of fibrous material water imbibition |
| CN112834369A (en) * | 2020-12-30 | 2021-05-25 | 江西省交通科学研究院 | Method for determining reasonable water content of solid waste doped road base material |
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| CN106525534B (en) | 2019-06-04 |
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