CN104215549B - Density testing method of mineral aggregate in recycled asphalt pavement material - Google Patents
Density testing method of mineral aggregate in recycled asphalt pavement material Download PDFInfo
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- CN104215549B CN104215549B CN201410465437.2A CN201410465437A CN104215549B CN 104215549 B CN104215549 B CN 104215549B CN 201410465437 A CN201410465437 A CN 201410465437A CN 104215549 B CN104215549 B CN 104215549B
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- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 85
- 239000011707 mineral Substances 0.000 title claims abstract description 85
- 239000000463 material Substances 0.000 title claims abstract description 81
- 238000012360 testing method Methods 0.000 title claims abstract description 46
- 239000010426 asphalt Substances 0.000 title claims abstract description 37
- 239000000945 filler Substances 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 14
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 10
- 239000007864 aqueous solution Substances 0.000 claims abstract description 7
- 239000006260 foam Substances 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 5
- 238000012216 screening Methods 0.000 claims abstract description 4
- 239000003350 kerosene Substances 0.000 claims description 21
- 238000001739 density measurement Methods 0.000 claims description 14
- 230000005484 gravity Effects 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 7
- 239000003517 fume Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- 150000001336 alkenes Chemical class 0.000 claims description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- JHJUUEHSAZXEEO-UHFFFAOYSA-M sodium;4-dodecylbenzenesulfonate Chemical group [Na+].CCCCCCCCCCCCC1=CC=C(S([O-])(=O)=O)C=C1 JHJUUEHSAZXEEO-UHFFFAOYSA-M 0.000 claims description 2
- 229960002415 trichloroethylene Drugs 0.000 abstract description 13
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- 238000003786 synthesis reaction Methods 0.000 abstract 2
- 239000010742 number 1 fuel oil Substances 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 6
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- 238000010998 test method Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 3
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- 238000012856 packing Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 238000000205 computational method Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- KVIPHDKUOLVVQN-UHFFFAOYSA-N ethene;hydrate Chemical compound O.C=C KVIPHDKUOLVVQN-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
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- Road Paving Structures (AREA)
Abstract
The invention discloses a density testing method of mineral aggregate in a recycled asphalt pavement material. The method comprises the following steps of extracting and drying the recycled asphalt pavement material by utilizing a trichloro ethylene solvent to obtain mineral aggregate; screening and grading the mineral aggregate; washing coarse aggregate and fine aggregate by utilizing an anionic surfactant aqueous solution until that all surface bubbles are discharged and no foam floats on the water surface, testing the mineral aggregate by adopting a mesh basket method after the mineral aggregate is dried to obtain the appearance relative density and the gross volume relative density; soaking filler in waterless coal oil, and testing so as to acquire the relative density of the filler; and respectively calculating the gross volume relative density and the appearance relative density of the mineral aggregate in the recycled asphalt pavement material according to a density synthesis formula 1 and a density synthesis formula 2. The method has advantages that the mineral aggregate is washed in two ways, so that the determination precision of the overall density of the mineral aggregate can be improved; the operation is carried out inn a fuming cupboard, so that the environmental pollution is small, and the body health of test personnel is not influenced; the operation is simple and easy, and data are real and reliable.
Description
Technical field
The present invention relates to field of road, and in particular to coarse aggregate, fine aggregate in a kind of recovery asphalt pavement material,
The method of testing of the hybrid density of the mineral aggregates such as filler.
Background technology
Using after for many years, its overall performance is reduced bituminous paving, it is impossible to meet road with requiring.By old asphalt pavement milling,
Excavate, it is broken after, the recovery asphalt pavement material (hereinafter referred to as RAP) for obtaining still has very high value, can be used for
Various pavement recyclings.Applied of Asphalt Pavement Recycle Technique had both saved ample resources and fund, reduced the destruction to environment of cutting into a mountain for quarrying again,
Realize economic circulation development, Green Development and sustainable development.RAP is made up of mineral aggregate and Colophonium, and mineral aggregate is by certain proportion
Coarse aggregate, fine aggregate, filler composition, mineral aggregate surface is wrapped in Colophonium.The density of mineral aggregate is to calculate reclaimed asphalt mixture body
One of important parameter of product index.
Due to the mixture that RAP is mineral aggregate and Colophonium, must separate before test.Existing separation method is combustion method and extracting
Method, the drawbacks of two methods have certain.The easy quick efficiency high of combustion method, but the high temperature of combustion furnace can cause part ore deposit
Material ablation is decomposed, and surface opening hole increases, and aggregate water absorption is raised, and affects density result accuracy.Extraction process is using organic
Solvent, while dissolving mineral aggregate surface Colophonium, trichloro ethylene replaces Colophonium to continue contamination mineral aggregate.
Conventional coarse aggregate density test method according to《Highway engineering is gathered materials testing regulationss》In (JTG E42-2005)
" T0304-2005 coarse aggregates density and the moisture content test (basket method) " is operated and is calculated, and the liquid medium which adopts is for water；Often
Fine aggregate density test method according to《Highway engineering is gathered materials testing regulationss》In (JTG E42-2005), " T0330-2005 is thin
Density of gathering materials and the moisture content test " is operated and is calculated, and the liquid medium which adopts is for water；Conventional packing density test method is pressed
According to《Highway engineering is gathered materials testing regulationss》" T0352-2000 breeze density tests " operation and calculating in (JTG E42-2005), its
The liquid medium for adopting is distilled water or kerosene.Above test method is gathered materials and filler suitable for free of contamination cleaning.But for
By the RAP mineral aggregates that trichloro ethylene is infected with, directly can not use.
When water is medium, because water and trichloro ethylene are immiscible, a large amount of bubbles of mineral aggregate surface attachment, water cannot infiltrate mineral aggregate
Surface.Mineral aggregate is less, and phenomenon is more obvious, and stirring and long-time immersion can not eliminate this phenomenon, and mineral aggregate density test is basic
Cannot carry out；When kerosene is medium, because trichloro ethylene differs larger with kerosene proportion, the trichloro ethylene on filler surface is dissolved in kerosene
Afterwards, kerosene density and cubical expansivity change, and cause indirectly packing volume deviation larger.
Based on above reason, it is necessary to secondary eluting is carried out to trichloro ethylene, eliminate its interference to density test, but at present
There is no targetedly method.
At the same time, because particle diameter is different, density measurement method is also different, RAP ore deposits for coarse aggregate, fine aggregate, filler
The necessary screened stepping of three class materials in material, difference test density, then enter line density composite calulation, obtain mineral aggregate density.But
It is《Highway engineering is gathered materials testing regulationss》(JTG E42-2005) only provides the respective density computational methods of three class materials, does not give
Go out the density computational methods of the mineral aggregate being made up of three class materials.
The content of the invention
For the problems referred to above, the present invention is intended to provide one kind can eliminate the interference of mineral aggregate surface attachments and accurately can survey
Surely reclaim coarse aggregate, fine aggregate, the method for testing of the hybrid density of filler in bituminous paving mineral aggregate.
To realize the technical purpose, the solution of the present invention is：A kind of density measurement for reclaiming asphalt pavement material Mineral Material
Method, the method for testing step are as follows：
(1) the pre- thermal softening of asphalt pavement material will be reclaimed, fritter will manually be separated into, and then Colophonium will be reclaimed in fume hood
Ground surface material is stripped with trichloroethylene solvent, and mineral aggregate is obtained after the completion of extracting, and mineral aggregate is put into 100～110 DEG C of baking oven
Middle drying and processing；
(2) mineral aggregate is cooled to after room temperature, carries out screening stepping：
When the mineral aggregate nominal maximum particle diameter in RAP be more than 2.36mm when, mineral aggregate should be divided into more than 2.36mm coarse aggregate,
0.15～2.36mm fine aggregates, 0～0.15mm filler third gear；
When the mineral aggregate nominal maximum particle diameter in RAP be less than 2.36mm when, mineral aggregate should be divided into 0.15～2.36mm fine aggregates, 0
Two grades of～0.15mm fillers；
(3) the aqueous solution of anionic surfactant of configuration quality percentage ratio 0.2%～0.3%, coarse aggregate is immersed in molten
In liquid, it is sufficiently stirred for, eluriates for several times repeatedly, and constantly slowly injects new water, until coarse aggregate blibbing is all discharged, and water
Face non-foam floating, then coarse aggregate is put in 100～110 DEG C of baking oven carries out drying and processing；
Clean coarse aggregate is obtained, then according to《Highway engineering is gathered materials testing regulationss》In JTG E42 " coarse aggregate density and
The moisture content test (basket method) " is operated, and apparent relative density (dimensionless), the bulk specific gravity for obtaining coarse aggregate is (immeasurable
Guiding principle)；
(4) the aqueous solution of anionic surfactant of mass percent 0.3%～0.5% is prepared, fine aggregate is immersed in molten
In liquid, fully stir, eluriate repeatedly, and constantly slowly inject new water, until fine aggregate blibbing is all discharged, the water surface is still
After foam floating, fine aggregate is poured into tray, be cooled to room temperature after drying in being put into 100～110 DEG C of baking oven；
Clean fine aggregate is obtained, then according to《Highway engineering is gathered materials testing regulationss》" fine aggregate density in (JTG E42)
And the moisture content test (basket method) " operation, obtain apparent relative density (dimensionless), the bulk specific gravity (nothing of fine aggregate
Dimension)；
(5) in fume hood, filler is immersed in anhydrous kerosene, is fully stirred, the bubble effusion allowed inside filler is quiet
A period of time is put after filler precipitation, kerosene is carefully poured out；New kerosene is added again, repeats aforesaid operations at least 1 time；
Pour filler into tray, treat that kerosene evaporates into face and does, be often cooled to after drying in being put into 110～120 DEG C of baking oven
Temperature, obtains clean filler, according to《Highway engineering is gathered materials testing regulationss》" breeze density test " operation in JTG E42, liquid
Medium selects anhydrous kerosene, test to obtain the relative density (dimensionless) of filler；
(6) the apparent relative density (dimensionless) of RAP Mineral Materials is calculated according to density composite formula 1；
In formula：P1、P2、P3- coarse aggregate, fine aggregate, filler account for the percentage ratio of mineral aggregate gross mass, itself and be 100；
D1、D2The apparent relative density of-coarse aggregate, fine aggregate；D3The relative density of-filler.
(7) the bulk specific gravity (dimensionless) of RAP Mineral Materials is calculated according to density composite formula 2；
In formula：P1、P2、P3- coarse aggregate, fine aggregate, filler account for the percentage ratio of mineral aggregate gross mass, itself and be 100；
R1、R2The bulk specific gravity of-coarse aggregate, fine aggregate；R3The relative density of-filler.
Preferably, the step (4), fine aggregate is placed in 0.15mm square hole screens and is eluriated in batches.
Preferably, the anion surfactant is dodecylbenzene sodium sulfonate, fatty alcohol-ether sodium sulfate or alkene
Base sodium sulfonate.
Preferably, the step (1), it is 110～130 DEG C to reclaim asphalt pavement material preheating softening temperature.
Preferably, the step (5), the drying temperature of filler is 110～120 DEG C.
The advantages of the present invention are：
1. the density measurement method of the recovery asphalt pavement material Mineral Material of the present invention, is taken out with trichloroethylene solvent
Carry, it can be ensured that the Colophonium in coarse aggregate, fine aggregate, filler surface and space is removed clean；Carry out in fume hood simultaneously
Operation, environmental pollution are little, do not affect testing crew healthy；
2. the density measurement method of the recovery asphalt pavement material Mineral Material of the present invention, coarse aggregate and fine aggregate using it is cloudy from
Sub- surfactant washing, can clean trichloro ethylene, improve certainty of measurement, while eluriated and water filling, can be further
Trichloro ethylene in clean deep layer space；
3. the density measurement method of the recovery asphalt pavement material Mineral Material of the present invention, filler is using at anhydrous kerosene mode
There is hydration reaction with water in reason, the cement that may contain in preventing filler, affect result of the test；
4. two types material is treated, cleaning treatment is carried out respectively using two ways, it is ensured that the precision of measurement, from
And improve the measurement accuracy of mineral aggregate global density；
5. the present invention recovery asphalt pavement material Mineral Material density measurement method, simple and easy to do, data are true and reliable,
Low cost, low stain can provide accurate parameter for reclaimed asphalt mixture volume index, be that one kind has higher innovation
Density measurement method.
Specific embodiment
The present invention is described in further details with reference to specific embodiment.
Specific embodiment of the present invention is a kind of density measurement method for reclaiming asphalt pavement material Mineral Material, described
Method of testing step is as follows：
(1) the pre- thermal softening of asphalt pavement material will be reclaimed, fritter will manually be separated into, and then Colophonium will be reclaimed in fume hood
Ground surface material is stripped with trichloroethylene solvent, and mineral aggregate is obtained after the completion of extracting.Mineral aggregate is put into into 100～110 DEG C of baking oven
Middle drying and processing；
(2) mineral aggregate is cooled to after room temperature, carries out screening stepping：
When the mineral aggregate nominal maximum particle diameter in RAP be more than 2.36mm when, mineral aggregate should be divided into more than 2.36mm coarse aggregate,
0.15～2.36mm fine aggregates, 0～0.15mm filler third gear；
When the mineral aggregate nominal maximum particle diameter in RAP be less than 2.36mm when, mineral aggregate should be divided into 0.15～2.36mm fine aggregates, 0
Two grades of～0.15mm fillers；
(3) the aqueous solution of anionic surfactant of configuration quality percentage ratio 0.2%～0.3%, coarse aggregate is immersed in molten
In liquid, it is sufficiently stirred for, eluriates for several times repeatedly, and constantly slowly injects new water, until coarse aggregate blibbing is all discharged, and water
Face non-foam floating, till surface of aggregate infiltrates good, light, is then put into coarse aggregate in 100～110 DEG C of baking oven
Carry out drying and processing；
Clean coarse aggregate is obtained, then according to《Highway engineering is gathered materials testing regulationss》" coarse aggregate density in (JTG E42)
And the moisture content test (basket method) " operation, obtain apparent relative density (dimensionless), the bulk specific gravity (nothing of coarse aggregate
Dimension)；
(4) the aqueous solution of anionic surfactant of mass percent 0.3%～0.5% is prepared, fine aggregate is immersed in molten
In liquid, fully stir, eluriate repeatedly, and constantly slowly inject new water, until fine aggregate blibbing is all discharged, the water surface is still
After foam floating, fine aggregate is poured into tray, be cooled to room temperature after drying in being put into 100～110 DEG C of baking oven；
Clean fine aggregate is obtained, then according to《Highway engineering is gathered materials testing regulationss》" fine aggregate density in (JTG E42)
And the moisture content test (basket method) " operation, obtain apparent relative density (dimensionless), the bulk specific gravity (nothing of fine aggregate
Dimension)；
According to《Highway engineering is gathered materials testing regulationss》" breeze density test " operation in (JTG E42), in fume hood
In, filler is immersed in anhydrous kerosene, is fully stirred, the bubble effusion allowed inside filler, standing a period of time treats that filler sinks
Behind shallow lake, kerosene is carefully poured out；New kerosene is added again, repeats aforesaid operations at least 1 time；
Pour filler into tray, treat that kerosene evaporates into face and does, be often cooled to after drying in being put into 110～120 DEG C of baking oven
Temperature, liquid medium select anhydrous kerosene, test to obtain the relative density (dimensionless) of filler；
(6) the apparent relative density (dimensionless) of RAP Mineral Materials is calculated according to density composite formula 1；
In formula：P1、P2、P3- coarse aggregate, fine aggregate, filler account for the percentage ratio of mineral aggregate gross mass, itself and be 100；
D1、D2The apparent relative density of-coarse aggregate, fine aggregate；D3The relative density of-filler.
(7) the bulk specific gravity (dimensionless) of RAP Mineral Materials is calculated according to density composite formula 2；
In formula：P1、P2、P3- coarse aggregate, fine aggregate, filler account for the percentage ratio of mineral aggregate gross mass, itself and be 100；
R1、R2The bulk specific gravity of-coarse aggregate, fine aggregate；R3The relative density of-filler.
In order to preferably clean the trichloro ethylene on mineral aggregate surface, the anion surfactant is DBSA
Sodium, fatty alcohol-ether sodium sulfate or sodium olefin sulfonate.
To prevent from gathering materials lost, institute's step 4 can immerse 0.15mm square hole screens in solution, and fine aggregate is placed in square hole in batches
Eluriate in sieve.
Concrete test data is as follows：
Embodiment 1：
A kind of coarse aggregate, adopts《Highway engineering is gathered materials testing regulationss》The method of (JTG E42) obtains actual density.Will be thick
Gathering materials, it is attached to be wrapped up in heated bitumen, measures density again using the inventive method, is shown in Table 1.
1 coarse aggregate density of table is contrasted
As can be seen from the above table, the mineral aggregate that asphalt pavement material is reclaimed in attached simulation is wrapped up in using coarse aggregate heated bitumen, then
Carry out the laggard line parameter of the first to three step process to determine, the apparent relative density and bulk specific gravity two of drawn coarse aggregate
Item result is of slight difference with the data of former coarse aggregate, equal coincidence loss standard.
As fine aggregate and coarse aggregate property and processing mode are similar, can derive, the method for testing is also complied with carefully
The apparent relative density for gathering materials and the measure of bulk specific gravity are required.
Embodiment 2：
A kind of filler, adopts《Highway engineering is gathered materials testing regulationss》The method of (JTG E42) obtains actual density.By filler
Wrapped up in heated bitumen attached, density is measured again using the inventive method, 2 are shown in Table.
2 packing density of table is contrasted
As can be seen from the above table, the mineral aggregate that asphalt pavement material is reclaimed in attached simulation, Ran Houjin are wrapped up in using filler heated bitumen
Row first and second, the laggard line parameter measure of five steps process, the result of the apparent relative density of drawn filler and the data phase of filler
Little, the coincidence loss standard of difference.
Embodiment 3：
A kind of RAP, the nominal maximum particle diameter of its Mineral Material is 9.5mm, measures density using the inventive method, is shown in Table 3.
Each shelves density of material in 3 mineral aggregate of table
Mineral aggregate in the RAP
Mineral aggregate in the RAP
As can be seen from the above table, the coarse aggregate containing more than 2.36mm in 3 mineral aggregate of table, it should using the thick of more than 2.36mm
Gather materials, 0.15～2.36mm fine aggregates, 0～0.15mm third gear are sieved, then respectively each material is cleaned respectively and surveyed
It is fixed.The apparent relative density and hair relative density of the RAP for being determined can be used for calculating reclaimed asphalt mixture volume index.
Embodiment 4：
A kind of RAP, the nominal maximum particle diameter of its Mineral Material is 2.36mm, measures density using the inventive method, is shown in Table 4.
Each shelves density of material in 4 mineral aggregate of table
Mineral aggregate in the RAP
Mineral aggregate in the RAP
As can be seen from the above table, do not contain the coarse aggregate of more than 2.36mm in 3 mineral aggregate of table, it should using 0.15～2.36mm
Fine aggregate, two grades of 0～0.15mm fillers are sieved, and then respectively each material are cleaned respectively and are determined.The RAP for being determined
Apparent relative density and hair relative density can be used for calculate reclaimed asphalt mixture volume index.
The above, only presently preferred embodiments of the present invention, not to limit the present invention, every skill according to the present invention
Any trickle amendment, equivalent and improvement that art is substantially made to above example, should be included in technical solution of the present invention
Protection domain within.
Claims (5)
1. a kind of density measurement method for reclaiming asphalt pavement material Mineral Material, the method for testing step is as follows：
(1) the pre- thermal softening of asphalt pavement material will be reclaimed, fritter will manually be separated into, and then bituminous paving will be reclaimed in fume hood
Material is stripped with trichloroethylene solvent, and mineral aggregate is obtained after the completion of extracting, mineral aggregate is put in 100～110 DEG C of baking oven and is dried
Dry-cure；
(2) mineral aggregate is cooled to after room temperature, carries out screening stepping：
When mineral aggregate nominal maximum particle diameter is more than 2.36mm, mineral aggregate should be divided into the coarse aggregate of more than 2.36mm, 0.15～2.36mm
Fine aggregate, 0～0.15mm filler third gear；
When mineral aggregate nominal maximum particle diameter is less than 2.36mm, mineral aggregate should be divided into 0.15～2.36mm fine aggregates, 0～0.15mm fillers
Two grades；
(3) the aqueous solution of anionic surfactant of mass percent 0.2%～0.3% is prepared, coarse aggregate is immersed in into solution
In, it is sufficiently stirred for, eluriates for several times repeatedly, and constantly slowly injects new water, until coarse aggregate blibbing is all discharged, and the water surface
Non-foam is floated, and then coarse aggregate is put in 100～110 DEG C of baking oven carries out drying and processing；
Clean coarse aggregate is obtained, then according to《Highway engineering is gathered materials testing regulationss》" coarse aggregate density and water suction in JTG E42
Rate tests (basket method) " operation, obtain apparent relative density (dimensionless), the bulk specific gravity (dimensionless) of coarse aggregate；
(4) the aqueous solution of anionic surfactant of mass percent 0.3%～0.5% is prepared, fine aggregate is immersed in into solution
In, fully stir, eluriate repeatedly, and constantly slowly inject new water, until fine aggregate blibbing is all discharged, water surface non-foam
After floating, fine aggregate is poured into tray, be cooled to room temperature after drying in being put into 100～110 DEG C of baking oven；
Clean fine aggregate is obtained, then according to《Highway engineering is gathered materials testing regulationss》" fine aggregate density and water suction in JTG E42
Rate tests (basket method) " operation, obtain apparent relative density (dimensionless), the bulk specific gravity (dimensionless) of fine aggregate；
(5) in fume hood, filler is immersed in anhydrous kerosene, is fully stirred, the bubble effusion allowed inside filler stands one
The section time, after filler precipitation, carefully pours out kerosene；New kerosene is added again, repeats aforesaid operations at least 1 time；
Pour filler into tray, treat that kerosene evaporates into face and does, room temperature is cooled to after drying in being put into 110～120 DEG C of baking oven, is obtained
To clean filler, according to《Highway engineering is gathered materials testing regulationss》" breeze density test " operation in JTG E42, liquid medium choosing
Anhydrous kerosene is selected, test obtains the relative density (dimensionless) of filler；
(6) the apparent relative density (dimensionless) for reclaiming asphalt pavement material Mineral Material is calculated according to density composite formula 1；
In formula：P1、P2、P3- coarse aggregate, fine aggregate, filler account for the percentage ratio of mineral aggregate gross mass, itself and be 100；
D1、D2The apparent relative density of-coarse aggregate, fine aggregate；D3The relative density of-filler；
(7) the bulk specific gravity (dimensionless) for reclaiming asphalt pavement material Mineral Material is calculated according to density composite formula 2；
In formula：P1、P2、P3- coarse aggregate, fine aggregate, filler account for the percentage ratio of mineral aggregate gross mass, itself and be 100；
R1、R2The bulk specific gravity of-coarse aggregate, fine aggregate；R3The relative density of-filler.
2. it is according to claim 1 reclaim asphalt pavement material Mineral Material density measurement method, it is characterised in that：It is described
Step (4), fine aggregate is placed in batches in 0.15mm square hole screens and is eluriated.
3. it is according to claim 1 and 2 reclaim asphalt pavement material Mineral Material density measurement method, it is characterised in that：
The anion surfactant is dodecylbenzene sodium sulfonate, fatty alcohol-ether sodium sulfate or sodium olefin sulfonate.
4. it is according to claim 1 and 2 reclaim asphalt pavement material Mineral Material density measurement method, it is characterised in that：
The step (1), it is 110～130 DEG C to reclaim asphalt pavement material preheating softening temperature.
5. it is according to claim 1 and 2 reclaim asphalt pavement material Mineral Material density measurement method, it is characterised in that：
The step (5), the drying temperature of filler is 110～120 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410465437.2A CN104215549B (en) | 2014-09-12 | 2014-09-12 | Density testing method of mineral aggregate in recycled asphalt pavement material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410465437.2A CN104215549B (en) | 2014-09-12 | 2014-09-12 | Density testing method of mineral aggregate in recycled asphalt pavement material |
Publications (2)
| Publication Number | Publication Date |
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| CN104215549A CN104215549A (en) | 2014-12-17 |
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| CN111693016A (en) * | 2020-05-26 | 2020-09-22 | 安庆市凯瑞建材有限公司 | Device for quickly and accurately measuring density of homogeneous fireproof insulation board |
| CN112557258B (en) * | 2020-11-23 | 2022-12-02 | 金发科技股份有限公司 | Solution for testing density of high polymer material and application thereof |
| CN115078175A (en) * | 2022-07-25 | 2022-09-20 | 佛山市交通科技有限公司 | Method for testing aggregate density after extraction of asphalt recovery old material |
| CN115490475B (en) * | 2022-09-19 | 2023-09-15 | 江苏金海宁新型建材科技有限公司 | Water permeable concrete resistant to ubiquity and alkalization and preparation method thereof |
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