CN103454202A - Testing method of aggregating specific surface area of bituminous mixture - Google Patents
Testing method of aggregating specific surface area of bituminous mixture Download PDFInfo
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Abstract
The invention relates to a testing method of the aggregating specific surface area of a bituminous mixture. The problem that in the prior art, quality cannot be guaranteed, and no methods exist for quickly and accurately testing the index of the aggregating specific surface area is solved. The testing method of the aggregating specific surface area of the bituminous mixture comprises the following steps that first, the relationship of a coating film thickness and a film coating machine working parameter is determined, namely a calibration process of the testing method of the aggregating specific surface area is carried out; second, according to the obtained relationship of the coating film thickness and the film coating machine working parameter, testing is carried out on the specific surface area of an aggregate to be tested, namely a testing process of the testing method of the aggregating specific surface area is carried out. According to the method, the specific surface area of the aggregate can be accurately tested, and the method is especially suitable for testing the specific surface area of an aggregate in an irregular shape and with complex surface lines. The method can be used for the field of building materials and the research of physical and microscopic property of irregular particles.
Description
Technical field
The present invention relates to a kind of method of testing of the specific surface area of gathering materials of asphalt.
Background technology
In recent years, along with the construction development of China's highway, construction quality assurance and the control work of bituminous pavement are most important, and the quality of gathering materials has been proposed to more and more higher requirement.In the control of Asphalt Pavement for Quality process, the specific surface area of gathering materials variation meeting directly changes the micromechanism of asphalt, affects pavement usage quality and service life.And quality control procedure at the scene, variation in view of the density of gathering materials, physical dimension and size composition characteristic, the specific surface area index undulatory property that makes scene gather materials is remarkable, if now do not take smelting quality control measure, the quality of compound must be affected, therefore how to test fast at the scene and to analyze this index situation, just becoming very important.The specific surface area that test is gathered materials accurately is for building material field, and the research of the physics of irregular particle and microscopic property all has positive effect.At present, for this index of specific surface area of gathering materials, prior art just rests on the theoretical approximate treatment under the multiple hypotheses condition, can not meet the needs of quality assurance, and quick and precisely test and still there is no method for this index scene.
Summary of the invention
The objective of the invention is can not meet in order to solve prior art quality assurance needs, the quick and precisely test of this index of specific surface area of gathering materials is not still had to methodical problem, a kind of method of testing of the specific surface area of gathering materials of asphalt is provided.
The method of testing of the specific surface area of gathering materials of a kind of asphalt of the present invention, according to following steps, carry out:
One, get the typical mother metal of test set material samples, cut into the cube specimen that the length of side is 50mm, measure respectively quality and the size of every test specimen, calculate the total surface area A of every test specimen
bri;
Two, choose the cube specimen cut in 6～8 step 1, the baking oven that to be placed in temperature be 100～105 ℃ is dried 3～4h, is cooled to room temperature, and weighing test specimen quality is M respectively
ori;
Three, the representative test specimen described in step 2 is carried out to plated film in vacuum coating equipment, the vacuum coating equipment running parameter is set in debugging, make the uniform aluminium film of test specimen plated surface one deck, the vacuum coating equipment running parameter PA that record is set, take the test specimen mass M after plated film
coa, the average coating film thickness δ of calculation testing piece
h, test specimen coating film thickness computing formula is as follows:
δ
h=(M
coa-M
ori)/ρ
AL/A
bri×1000
Wherein, in formula, parameter declaration is as follows:
δ
h---aluminium film nominal thickness, the μ m of unit;
M
ori---demarcate the dry mass with test block, the g of unit;
M
coa---the demarcation test block quality after plated film, the g of unit;
ρ
aL---the density of aluminium coat material, the g/cm of unit
3;
A
bri---the total surface area of calibrating block, the mm of unit
2;
Four, according to the running parameter PA of the coating machine of setting in step 3 and the average coating film thickness δ of test specimen
h, determine coating film thickness and coating machine running parameter relation, by the acquired results drafting pattern, final definite the suitableeest coating machine running parameter that coating film thickness is 0.6 μ m～1.0 μ m that meets;
Five, test the is gathered materials baking oven that is placed in 100～105 ℃ is dried 3～4h, is cooled to room temperature, and taking the test aggregate quality is M
1;
Six, the test described in step 5 is gathered materials carry out plated film in vacuum coating equipment, the vacuum coating equipment running parameter is set as in step 4 the suitableeest coating machine running parameter of determining, takes the sample mass M after plated film
2;
Seven, calculate the actual measurement specific surface area of gathering materials, computing formula is as follows:
SA=(M
2-M
1)/ρ
AL/δ
h/M
1/1000
Wherein, in formula, each parameter declaration is as follows:
SA---the specific surface area of gathering materials, the m of unit
2/ kg;
M
1---the drying sample mass that gathers materials, the g of unit;
M
2---the sample mass after plated film, the g of unit;
ρ
aL---the density of aluminium coat material, the g/cm of unit
3;
δ
h---aluminium film nominal thickness, the μ m of unit.
The present invention comprises following beneficial effect:
The method can be tested the specific surface area of gathering materials accurately, but the specific surface area of gathering materials that particularly possesses irregularly shaped and superficial makings complexity also adopting said method is tested, for building material field, and the research of the physics of irregular particle and microscopic property all has positive effect.
The accompanying drawing explanation
Fig. 1 is photo before the typical material A plated film of ACHENG stone field.
Fig. 2 is photo after the typical material A plated film of ACHENG stone field.
Fig. 3 is coating film thickness and coating machine running parameter relation and coating machine running parameter acquisition methods schematic diagram in embodiment mono-.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the combination in any between each embodiment.
Embodiment one: a kind of method of testing of the specific surface area of gathering materials of asphalt, according to following steps, carry out:
One, get the typical mother metal of test set material samples, cut into the cube specimen that the length of side is 50mm, measure respectively quality and the size of every test specimen, calculate the total surface area A of every test specimen
bri;
Two, choose the cube specimen cut in 6～8 step 1, the baking oven that to be placed in temperature be 100～105 ℃ is dried 3～4h, is cooled to room temperature, and weighing test specimen quality is M respectively
ori;
Three, the representative test specimen described in step 2 is carried out to plated film in vacuum coating equipment, the vacuum coating equipment running parameter is set in debugging, make the uniform aluminium film of test specimen plated surface one deck, the vacuum coating equipment running parameter PA that record is set, take the test specimen mass M after plated film
coa, the average coating film thickness δ of calculation testing piece
h, test specimen coating film thickness computing formula is as follows:
δ
h=(M
coa-M
ori)/ρ
AL/A
bri×1000
Wherein, in formula, parameter declaration is as follows:
δ
h---aluminium film nominal thickness, the μ m of unit;
M
ori---demarcate the dry mass with test block, the g of unit;
M
coa---the demarcation test block quality after plated film, the g of unit;
ρ
aL---the density of aluminium coat material, the g/cm of unit
3;
A
bri---the total surface area of calibrating block, the mm of unit
2;
Four, according to the running parameter PA of the coating machine of setting in step 3 and the average coating film thickness δ of test specimen
h, determine coating film thickness and coating machine running parameter relation, by the acquired results drafting pattern, final definite the suitableeest coating machine running parameter that coating film thickness is 0.6 μ m～1.0 μ m that meets;
Five, test the is gathered materials baking oven that is placed in 100～105 ℃ is dried 3～4h, is cooled to room temperature, and taking the test aggregate quality is M
1;
Six, the test described in step 5 is gathered materials carry out plated film in vacuum coating equipment, the vacuum coating equipment running parameter is set as in step 4 the suitableeest coating machine running parameter of determining, takes the sample mass M after plated film
2;
Seven, calculate the actual measurement specific surface area of gathering materials, computing formula is as follows:
SA=(M
2-M
1)/ρ
AL/δ
h/M
1/1000
Wherein, in formula, each parameter declaration is as follows:
SA---the specific surface area of gathering materials, the m of unit
2/ kg;
M
1---the drying sample mass that gathers materials, the g of unit;
M
2---the sample mass after plated film, the g of unit;
ρ
aL---the density of aluminium coat material, the g/cm of unit
3;
δ
h---aluminium film nominal thickness, the μ m of unit.
Embodiment two: present embodiment is different from embodiment one: the length of side accuracy requirement of cube specimen described in step 1 is ± 2mm.Other is identical with embodiment one.
Embodiment three: present embodiment is different from embodiment one or two: cube specimen described in step 2 is placed in the baking oven that temperature is 105 ℃ and dries 3～4h.Other is identical with embodiment one or two.
Embodiment four: present embodiment is different from one of embodiment one to three: cube specimen described in step 2 is placed in the baking oven that temperature is 105 ℃ and dries 3.5h.Other is identical with one of embodiment one to three.
Embodiment five: present embodiment is different from one of embodiment one to four: test the baking oven that is placed in 105 ℃ that gathers materials described in step 5 and dry 3～4h.Other is identical with one of embodiment one to four.
Embodiment six: present embodiment is different from one of embodiment one to five: test the baking oven that is placed in 105 ℃ that gathers materials described in step 5 and dry 3.5h.Other is identical with one of embodiment one to five.
Embodiment seven: present embodiment is different from one of embodiment one to six: the quality of test specimen described in step 2 is M
oribe accurate to 0.001g, the test specimen mass M described in step 3 after plated film
coabe accurate to 0.001g, test the mass M of gathering materials described in step 5
1be accurate to 0.001g, the sample mass M in step 6 after plated film
2be accurate to 0.001g.Other is identical with one of embodiment one to six.
Verify beneficial effect of the present invention by following examples:
Embodiment mono-: a kind of method of testing of the specific surface area of gathering materials can complete by the following method:
One, get the ACHENG stone field typical case A that gathers materials, be cut to length of side 50mm cube specimen, length of side accuracy requirement ± 2mm, 6～8 of test specimen quantity, accurately record its quality and size, calculates the total surface area A that demarcates test specimen
bri, the mm of unit
2.
Two, test specimen step 1 cut into is placed in the baking oven of 100～105 ℃ and dries 4h, cooling after, take respectively the test specimen quality, be designated as M
ori, be accurate to 0.001g.
Three, test specimen in step 2 is carried out in vacuum coating equipment to plated film, the vacuum coating equipment running parameter is set in debugging, makes the uniform aluminium film of plated surface one deck, and the average thickness of aluminium film, at 0.6～1.0 μ m, records vacuum coating equipment setup parameter PA.Take the sample mass M after plated film
coa, be accurate to 0.001g.
It is as follows that vacuum coating equipment running parameter method is set in debugging:
Under the regulation working temperature and plated film time conditions of coating machine, set respectively the running parameter PA of coating machine, and calculate the average coating film thickness δ of test block
hbricomputing method are calculated with reference to formula (2).Corresponding running parameter and gained film thickness result of calculation are as shown in table 1 below.
Table 1 coating machine running parameter and gained film thickness result of calculation
By the acquired results drafting pattern, as shown in Figure 3.Determining of work setup parameter, can carry out according to following step:
1, on calibration line (coating film thickness and coating machine running parameter relation), find the point on the curve that coating film thickness 0.6 μ m, 1.0 μ m are corresponding;
2, take this point is starting point, draws vertical line downwards, obtains the intersection point of vertical line and transverse axis, is labeled as respectively PA
0.6, PA
1.0;
3, PA
0.6～PA
1.0scope, be to meet the coating machine running parameter scope that coating film thickness 0.6 μ m～1.0 μ m are corresponding;
4, calculate coating machine work setup parameter PA
d:
PA
d=(PA
0.6+PA
1.0)/2 （1）
Wherein, in formula, parameter declaration is as follows:
PA
d---coating machine work setup parameter;
PA
0.6---meet coating machine running parameter corresponding to coating film thickness 0.6 μ m;
PA
1.0---meet coating machine running parameter corresponding to coating film thickness 1.0 μ m.
The thick requirement according to plated film, determine that optional coating machine running parameter scope is 36～46, generally can get intermediate value PA
d=41.
Four, calculate the test block coating film thickness and complete calibration process.Test block coating film thickness computing formula is as follows:
δ
h=(M
coa-M
ori)/ρ
AL/A
bri×1000 （2）
Wherein, in formula, parameter declaration is as follows:
δ
h---aluminium film nominal thickness, the μ m of unit;
M
ori---demarcate the dry mass with test block, the g of unit;
M
coa---the demarcation test block quality after plated film, the g of unit;
ρ
aL---the density of aluminium coat material, the g/cm of unit
3;
A
bri---the total surface area of calibrating block, the mm of unit
2.
Five, test is gathered materials and is placed in the baking oven of 100～105 ℃, dry 4h, cooling after, taking the aliquot part quality is M
1, be accurate to 0.001g.
Six, said sample is carried out plated film in vacuum coating equipment, vacuum coating equipment setup parameter PA
dmake the uniform aluminium film of plated surface one deck, the average thickness of aluminium film is at 0.6～1.0 μ m, like this assurance can be because aluminium be lepthymenia cladding material surface fully, simultaneously also unlikely aluminium film is blocked up and cover the superficial makings gathered materials, and guarantees the accuracy of test result.Take the sample mass M after plated film
2, be accurate to 0.001g.
Seven, according to the following formula (3) calculate the actual measurement specific surface area of gathering materials:
SA=(M
2-M
1)/ρ
AL/δ
h/M
1/1000 (3)
Wherein, in formula, each parameter declaration is as follows:
SA---the specific surface area of gathering materials, the m of unit
2/ kg;
M
1---the drying sample mass that gathers materials, the g of unit;
M
2---the sample mass after plated film, the g of unit;
ρ
aL---the density of aluminium coat material, the g/cm of unit
3;
δ
h---aluminium film nominal thickness, the μ m of unit.
Described step 1 to four is calibration process, consistent for the material source place of production, and what mother metal constituent and proterties did not change gathers materials, and this calibration process acquired results is applicable to carry out the specific surface area test use that this mother metal correspondence is gathered materials.Otherwise, need to re-start demarcation; Described step 5 to seven is process of the test, consistent for the material source place of production, and what mother metal constituent and proterties did not change gathers materials, and during the corresponding specific surface area of gathering materials of sampling observation test, only needs repeating step five to seven.
Claims (7)
1. the method for testing of the specific surface area of gathering materials of an asphalt is characterized in that described method carries out according to following steps:
One, get the typical mother metal of test set material samples, cut into the cube specimen that the length of side is 50mm, measure respectively quality and the size of every test specimen, calculate the total surface area A of every test specimen
bri;
Two, choose the cube specimen cut in 6～8 step 1, the baking oven that to be placed in temperature be 100～105 ℃ is dried 3～4h, is cooled to room temperature, and weighing test specimen quality is M respectively
ori;
Three, the representative test specimen described in step 2 is carried out to plated film in vacuum coating equipment, the vacuum coating equipment running parameter is set in debugging, make the uniform aluminium film of test specimen plated surface one deck, the vacuum coating equipment running parameter PA that record is set, take the test specimen mass M after plated film
coa, the average coating film thickness δ of calculation testing piece
h, test specimen coating film thickness computing formula is as follows:
δ
h=(M
coa-M
ori)/ρ
AL/A
bri×1000
Wherein, in formula, parameter declaration is as follows:
δ
h---aluminium film nominal thickness, the μ m of unit;
M
ori---demarcate the dry mass with test block, the g of unit;
M
coa---the demarcation test block quality after plated film, the g of unit;
ρ
aL---the density of aluminium coat material, the g/cm of unit
3;
A
bri---the total surface area of calibrating block, the mm of unit
2;
Four, according to the running parameter PA of the coating machine of setting in step 3 and the average coating film thickness δ of test specimen
h, determine coating film thickness and coating machine running parameter relation, by the acquired results drafting pattern, final definite the suitableeest coating machine running parameter that coating film thickness is 0.6 μ m～1.0 μ m that meets;
Five, test the is gathered materials baking oven that is placed in 100～105 ℃ is dried 3～4h, is cooled to room temperature, and taking the test aggregate quality is M
1;
Six, the test described in step 5 is gathered materials carry out plated film in vacuum coating equipment, the vacuum coating equipment running parameter is set as in step 4 the suitableeest coating machine running parameter of determining, takes the sample mass M after plated film
2;
Seven, calculate the actual measurement specific surface area of gathering materials, computing formula is as follows:
SA=(M
2-M
1)/ρ
AL/δ
h/M
1/1000
Wherein, in formula, each parameter declaration is as follows:
SA---the specific surface area of gathering materials, the m of unit
2/ kg;
M
1---the drying sample mass that gathers materials, the g of unit;
M
2---the sample mass after plated film, the g of unit;
ρ
aL---the density of aluminium coat material, the g/cm of unit
3;
δ
h---aluminium film nominal thickness, the μ m of unit.
2. according to the method for testing of the specific surface area of gathering materials of a kind of asphalt described in claim 1, the length of side accuracy requirement that it is characterized in that cube specimen described in step 1 is ± 2mm.
3. according to the method for testing of the specific surface area of gathering materials of a kind of asphalt described in claim 2, it is characterized in that cube specimen described in step 2 is placed in the baking oven that temperature is 105 ℃ and dries 3～4h.
4. according to the method for testing of the specific surface area of gathering materials of a kind of asphalt described in claim 3, it is characterized in that cube specimen described in step 2 is placed in the baking oven that temperature is 105 ℃ and dries 3.5h.
5. according to the method for testing of the specific surface area of gathering materials of a kind of asphalt described in claim 4, it is characterized in that the baking oven that is placed in 105 ℃ that gathers materials of test described in step 5 dries 3～4h.
6. according to the method for testing of the specific surface area of gathering materials of a kind of asphalt described in claim 5, it is characterized in that the baking oven that is placed in 105 ℃ that gathers materials of test described in step 5 dries 3.5h.
7. according to the method for testing of the specific surface area of gathering materials of a kind of asphalt described in claim 6, it is characterized in that the quality of test specimen described in step 2 is M
oribe accurate to 0.001g, the test specimen mass M described in step 3 after plated film
coabe accurate to 0.001g, test the mass M of gathering materials described in step 5
1be accurate to 0.001g, the sample mass M in step 6 after plated film
2be accurate to 0.001g.
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|---|---|---|---|
| CN201310459575.5A CN103454202B (en) | 2013-09-29 | 2013-09-29 | A kind of method of testing of the specific surface area of gathering materials of asphalt |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940396A (en) * | 2014-04-16 | 2014-07-23 | 哈尔滨工业大学 | Test method for determining CRTSI type CA mortar asphalt film thickness |
| CN106570304A (en) * | 2016-11-23 | 2017-04-19 | 长安大学 | Method for acquiring specific surface area of asphalt mixed ingredients |
| CN109490192A (en) * | 2018-11-15 | 2019-03-19 | 南京林业大学 | A kind of test method of pitch and coarse aggregate adhesion |
| CN110619181A (en) * | 2019-09-23 | 2019-12-27 | 哈尔滨工业大学 | Method for calculating three-dimensional microscopic structure characterization parameters of asphalt mixture |
| CN111678870A (en) * | 2020-06-01 | 2020-09-18 | 肇庆宏旺金属实业有限公司 | Online detection method and system for continuous vacuum coating of stainless steel coil |
-
2013
- 2013-09-29 CN CN201310459575.5A patent/CN103454202B/en active Active
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| JOHN READ,ET AL: "《The Shell Bitumen Handbook》", 31 December 2003, article "Appendix 4:Calculation of bitumen film thickness in an asphalt", pages: 442 * |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940396A (en) * | 2014-04-16 | 2014-07-23 | 哈尔滨工业大学 | Test method for determining CRTSI type CA mortar asphalt film thickness |
| CN103940396B (en) * | 2014-04-16 | 2016-05-25 | 哈尔滨工业大学 | A kind of test method of definite CRTS I type CA mortar asphalt membrane thickness |
| CN106570304A (en) * | 2016-11-23 | 2017-04-19 | 长安大学 | Method for acquiring specific surface area of asphalt mixed ingredients |
| CN106570304B (en) * | 2016-11-23 | 2020-06-23 | 长安大学 | Method for obtaining specific surface area of asphalt mixture aggregate |
| CN109490192A (en) * | 2018-11-15 | 2019-03-19 | 南京林业大学 | A kind of test method of pitch and coarse aggregate adhesion |
| CN110619181A (en) * | 2019-09-23 | 2019-12-27 | 哈尔滨工业大学 | Method for calculating three-dimensional microscopic structure characterization parameters of asphalt mixture |
| CN111678870A (en) * | 2020-06-01 | 2020-09-18 | 肇庆宏旺金属实业有限公司 | Online detection method and system for continuous vacuum coating of stainless steel coil |
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|---|---|
| CN103454202B (en) | 2016-07-13 |
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