CN103454202B - A kind of method of testing of the specific surface area of gathering materials of asphalt - Google Patents
A kind of method of testing of the specific surface area of gathering materials of asphalt Download PDFInfo
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Abstract
The method of testing of the specific surface area of gathering materials of a kind of asphalt, relates to the method for testing of the specific surface area of gathering materials of a kind of asphalt.The method is to solve prior art to meet the needs of quality assurance, the quick and precisely test of this index of specific surface area of gathering materials still is not had methodical problem.The method of testing of the specific surface area of gathering materials of a kind of asphalt comprises the following steps: one, determine coating film thickness and coater running parameter relation, the calibration process of specific surface area of namely gathering materials method of testing；Two, according to the coating film thickness of gained and coater running parameter relation, to be measured gathering materials is carried out the mensuration of specific surface area, the process of the test of specific surface area of namely gathering materials method of testing.The present invention can test the specific surface area gathered materials accurately, particularly possesses irregularly shaped and that superficial makings the is complicated specific surface area gathered materials and also can test by adopting said method.Can be applicable to the research of the physics of building material field and irregular particle and microscopic property.
Description
Technical field
The present invention relates to the method for testing of the specific surface area of gathering materials of a kind of asphalt.
Background technology
In recent years, along with the development of China's highway, the construction quality of bituminous paving ensures and control work is most important, and the quality gathered materials is proposed increasingly higher requirement.In control of Asphalt Pavement for Quality process, specific surface area of gathering materials change can directly change the microstructure of asphalt, affects pavement usage quality and service life.And quality control procedure at the scene, variation in view of density of gathering materials, physical dimension and granularmetric composition characteristic, make the specific surface area index undulatory property that scene gathers materials notable, if now not taking smelting quality control measure, the quality of compound is necessarily affected, therefore how quickly to test at the scene and analyze this index situation, just becoming particularly significant.Test the specific surface area gathered materials accurately 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 is merely resting on theoretical approximate calculation when multiple hypotheses, it is impossible to meets the needs of quality assurance, and quick and precisely tests for this sign spot and still do not have method.
Summary of the invention
The invention aims to solve prior art to meet the needs of quality assurance, the quick and precisely test of gather materials coating film thickness and specific surface area index is not still had methodical problem, it is provided that the method for testing of the specific surface area of gathering materials of a kind of asphalt.
The method of testing of the specific surface area of gathering materials of a kind of asphalt of the present invention, carries out according to following steps:
One, take the typical mother metal of test set material samples, cut into the cube specimen that the length of side is 50mm, measure quality and the size of every piece of test specimen respectively, calculate the total surface area A of every piece of test specimenbri；
Two, choosing the cube specimen cut in 6～8 pieces of steps one, be placed in the baking oven that temperature is 100～105 DEG C and dry 3～4h, be cooled to room temperature, weighing test specimen quality respectively is Mori；
Three, the representative test specimen described in step 2 is carried out plated film in vacuum coating equipment, debugging sets vacuum coating equipment running parameter, make surface of test piece one layer of uniform aluminum film of plating, the vacuum coating equipment running parameter PA that record sets, weigh the test specimen mass M after plated filmcoa, the average coating film thickness δ of calculation testing pieceh, test specimen coating film thickness computing formula is as follows:
δh=(Mcoa-Mori)/ρAL/Abri×1000
Wherein, in formula, parameter declaration is as follows:
δhAluminum film nominal thickness, unit μm；
MoriThe dry mass of demarcation test block, unit g；
McoaDemarcation test block quality after plated film, unit g；
ρALThe density of aluminium coat material, unit g/cm3；
AbriThe total surface area of calibrating block, unit mm2；
Four, the average coating film thickness δ according to the running parameter PA of the coater set in step 3 and test specimenh, it is determined that coating film thickness and coater running parameter relation, by acquired results drafting pattern, finally determine and meet the suitableeest coater running parameter that coating film thickness is 0.6 μm～1.0 μm；
Five, drying 3～4h in the baking oven being placed in 100～105 DEG C that gathers materials by testing, be cooled to room temperature, weighing test aggregate quality is M1；
Six, the test described in step 5 being gathered materials and carry out plated film in vacuum coating equipment, vacuum coating equipment running parameter is set as the suitableeest coater running parameter determined in step 4, weighs the sample mass M after plated film2；
Seven, calculating actual measurement specific surface area of gathering materials, computing formula is as follows:
SA=(M2-M1)/ρAL/δh/M1/1000
Wherein, in formula, each parameter declaration is as follows:
SA gathers materials specific surface area, unit m2/kg；
M1Dry aggregate sample quality, unit g；
M2Sample mass after plated film, unit g；
ρALThe density of aluminium coat material, unit g/cm3；
δhAluminum film nominal thickness, unit μm.
The present invention comprises following beneficial effect:
The method can test the specific surface area gathered materials accurately, particularly possess irregularly shaped and that superficial makings the is complicated specific surface area gathered materials also can to test by adopting said method, for building material field, and the research of the physics of irregular particle and microscopic property all has positive effect.
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 coater running parameter relation and coater running parameter acquisition methods schematic diagram in embodiment one.
Detailed description of the invention
Technical solution of the present invention is not limited to act detailed description of the invention set forth below, also includes the combination in any between each detailed description of the invention.
Detailed description of the invention one: the method for testing of the specific surface area of gathering materials of a kind of asphalt, carries out according to following steps:
One, take the typical mother metal of test set material samples, cut into the cube specimen that the length of side is 50mm, measure quality and the size of every piece of test specimen respectively, calculate the total surface area A of every piece of test specimenbri；
Two, choosing the cube specimen cut in 6～8 pieces of steps one, be placed in the baking oven that temperature is 100～105 DEG C and dry 3～4h, be cooled to room temperature, weighing test specimen quality respectively is Mori；
Three, the representative test specimen described in step 2 is carried out plated film in vacuum coating equipment, debugging sets vacuum coating equipment running parameter, make surface of test piece one layer of uniform aluminum film of plating, the vacuum coating equipment running parameter PA that record sets, weigh the test specimen mass M after plated filmcoa, the average coating film thickness δ of calculation testing pieceh, test specimen coating film thickness computing formula is as follows:
δh=(Mcoa-Mori)/ρAL/Abri×1000
Wherein, in formula, parameter declaration is as follows:
δhAluminum film nominal thickness, unit μm；
MoriThe dry mass of demarcation test block, unit g；
McoaDemarcation test block quality after plated film, unit g；
ρALThe density of aluminium coat material, unit g/cm3；
AbriThe total surface area of calibrating block, unit mm2；
Four, the average coating film thickness δ according to the running parameter PA of the coater set in step 3 and test specimenh, it is determined that coating film thickness and coater running parameter relation, by acquired results drafting pattern, finally determine and meet the suitableeest coater running parameter that coating film thickness is 0.6 μm～1.0 μm；
Five, drying 3～4h in the baking oven being placed in 100～105 DEG C that gathers materials by testing, be cooled to room temperature, weighing test aggregate quality is M1；
Six, the test described in step 5 being gathered materials and carry out plated film in vacuum coating equipment, vacuum coating equipment running parameter is set as the suitableeest coater running parameter determined in step 4, weighs the sample mass M after plated film2；
Seven, calculating actual measurement specific surface area of gathering materials, computing formula is as follows:
SA=(M2-M1)/ρAL/δh/M1/1000
Wherein, in formula, each parameter declaration is as follows:
SA gathers materials specific surface area, unit m2/kg；
M1Dry aggregate sample quality, unit g；
M2Sample mass after plated film, unit g；
ρALThe density of aluminium coat material, unit g/cm3；
δhAluminum film nominal thickness, unit μm.
Detailed description of the invention two: present embodiment and detailed description of the invention one the difference is that: the Side length accuracy of cube specimen described in step one requires as ± 2mm.Other is identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment and detailed description of the invention one or two are placed in the baking oven that temperature is 105 DEG C drying 3～4h the difference is that: cube specimen described in step 2.Other is identical with detailed description of the invention one or two.
Detailed description of the invention four: one of present embodiment and detailed description of the invention one to three are placed in the baking oven that temperature is 105 DEG C drying 3.5h the difference is that: cube specimen described in step 2.Other is identical with one of detailed description of the invention one to three.
Detailed description of the invention five: one of present embodiment and detailed description of the invention one to four are gathered materials the difference is that: test described in step 5 and dried 3～4h in the baking oven being placed in 105 DEG C.Other is identical with one of detailed description of the invention one to four.
Detailed description of the invention six: one of present embodiment and detailed description of the invention one to five are gathered materials the difference is that: test described in step 5 and dried 3.5h in the baking oven being placed in 105 DEG C.Other is identical with one of detailed description of the invention one to five.
Detailed description of the invention seven: one of present embodiment and detailed description of the invention one to six the difference is that: test specimen quality described in step 2 is MoriIt is accurate to 0.001g, the test specimen mass M after plated film described in step 3coaIt is accurate to 0.001g, described in step 5, tests mass M of gathering materials1It is accurate to 0.001g, sample mass M after plated film in step 62It is accurate to 0.001g.Other is identical with one of detailed description of the invention one to six.
Beneficial effects of the present invention is verified by following example:
Embodiment one: the method for testing of a kind of specific surface area of gathering materials, can complete by the following method:
One, take ACHENG stone field typical case to gather materials A, be cut to length of side 50mm cube specimen, Side length accuracy requirement ± 2mm, test specimen quantity 6～8 pieces, accurately record its quality and size, calculate the total surface area A demarcating test specimenbri, unit mm2。
Two, the test specimen that step one cuts into is placed in the baking oven of 100～105 DEG C and dries 4h, after cooling, weigh test specimen quality respectively, be designated as Mori, it is accurate to 0.001g.
Three, test specimen in step 2 carrying out plated film in vacuum coating equipment, debugging sets vacuum coating equipment running parameter so that the uniform aluminum film of plated surface one layer, and the average thickness of aluminum film, at 0.6～1.0 μm, records vacuum coating equipment setup parameter PA.Weigh the sample mass M after plated filmcoa, it is accurate to 0.001g.
It is as follows that debugging sets vacuum coating equipment running parameter method:
Under the regulation operating temperature and plated film time conditions of coater, set the running parameter PA of coater respectively, and calculate the average coating film thickness δ of test blockhbriComputational methods 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 coater running parameter and gained film thickness result of calculation
By acquired results drafting pattern, as shown in Figure 3.The determination of operation setup parameter, can carry out as steps described below:
1, on calibration line (coating film thickness and coater running parameter relation), the point on coating film thickness 0.6 μm, curve 1.0 μm corresponding is found；
2, with this point for starting point, draw downwards vertical line, obtain the intersection point of vertical line and transverse axis, be respectively labeled as PA0.6、PA1.0；
3、PA0.6～PA1.0Scope, be the coater running parameter scope meeting coating film thickness 0.6 μm～1.0 μm corresponding；
4, coater operation setup parameter PA is calculatedd:
PAd=(PA0.6+PA1.0)/2(1)
Wherein, in formula, parameter declaration is as follows:
PAdCoater operation setup parameter；
PA0.6Meet the coater running parameter that coating film thickness is 0.6 μm corresponding；
PA1.0Meet the coater running parameter that coating film thickness is 1.0 μm corresponding.
According to the requirement that plated film is thick, it is determined that optional coater running parameter ranges for 36～46, generally can take intermediate value PAd=41.
Four, calculate test block coating film thickness and complete calibration process.Test block coating film thickness computing formula is as follows:
δh=(Mcoa-Mori)/ρAL/Abri×1000(2)
Wherein, in formula, parameter declaration is as follows:
δhAluminum film nominal thickness, unit μm；
MoriThe dry mass of demarcation test block, unit g；
McoaDemarcation test block quality after plated film, unit g；
ρALThe density of aluminium coat material, unit g/cm3；
AbriThe total surface area of calibrating block, unit mm2。
Five, gathering materials in the baking oven being placed in 100～105 DEG C by test, dry 4h, after cooling, weighing aliquot part quality is M1, it is accurate to 0.001g.
Six, said sample carries out plated film, vacuum coating equipment setup parameter PA in vacuum coating equipmentdMaking the uniform aluminum film of plated surface one layer, the average thickness of aluminum film, at 0.6～1.0 μm, so ensures material surface is completely covered because aluminum is lepthymenia, simultaneously also will not aluminum film blocked up and cover the superficial makings that gathers materials, it is ensured that the accuracy of test result.Weigh the sample mass M after plated film2, it is accurate to 0.001g.
Seven, according to the following formula (3) calculate actual measurement specific surface area of gathering materials:
SA=(M2-M1)/ρAL/δh/M1/1000(3)
Wherein, in formula, each parameter declaration is as follows:
SA gathers materials specific surface area, unit m2/kg；
M1Dry aggregate sample quality, unit g；
M2Sample mass after plated film, unit g；
ρALThe density of aluminium coat material, unit g/cm3；
δhAluminum film nominal thickness, unit μm.
Described step one is calibration process to four, and consistent for the material source place of production, what mother metal constituent and character did not change gathers materials, this calibration process acquired results, it is adaptable to carry out the specific surface area test use that this mother metal correspondence is gathered materials.Otherwise, it is necessary to re-start demarcation；Described step 5 is process of the test to seven, and consistent for the material source place of production, what mother metal constituent and character did not change gathers materials, during the specific surface area that sampling observation test correspondence is gathered materials, it is only necessary to repeat step 5 to seven.
Claims (7)
1. the method for testing of the specific surface area of gathering materials of an asphalt, it is characterised in that described method carries out according to following steps:
One, take the typical mother metal of test set material samples, cut into the cube specimen that the length of side is 50mm, measure quality and the size of every piece of test specimen respectively, calculate the total surface area A of every piece of test specimenbri；
Two, choosing the cube specimen cut in 6～8 pieces of steps one, be placed in the baking oven that temperature is 100～105 DEG C and dry 3～4h, be cooled to room temperature, weighing test specimen quality respectively is Mori；
Three, cube specimen step 2 obtained carries out plated film in vacuum coating equipment, and debugging sets vacuum coating equipment running parameter so that surface of test piece one layer of uniform aluminum film of plating, the vacuum coating equipment running parameter PA that record sets, and weighs the test specimen mass M after plated filmcoa, the average coating film thickness δ of calculation testing pieceh, test specimen coating film thickness computing formula is as follows:
δh=(Mcoa-Mori)/ρAL/Abri×1000；
Wherein, in formula, parameter declaration is as follows:
δhAluminum film nominal thickness, unit μm；
MoriThe dry mass of demarcation test block, unit g；
McoaDemarcation test block quality after plated film, unit g；
ρALThe density of aluminium coat material, unit g/cm3；
AbriThe total surface area of calibrating block, unit mm2；
Four, the average coating film thickness δ according to the running parameter PA of the coater set in step 3 and test specimenh, it is determined that coating film thickness and coater running parameter relation, by acquired results drafting pattern, finally determine and meet the suitableeest coater running parameter that coating film thickness is 0.6 μm～1.0 μm；
Five, drying 3～4h in the baking oven being placed in 100～105 DEG C that gathers materials by testing, be cooled to room temperature, weighing test aggregate quality is M1；
Six, the test described in step 5 being gathered materials and carry out plated film in vacuum coating equipment, vacuum coating equipment running parameter is set as the suitableeest coater running parameter determined in step 4, weighs the sample mass M after plated film2；
Seven, calculating actual measurement specific surface area of gathering materials, computing formula is as follows:
SA=(M2-M1)/ρAL/δh/M1/1000
Wherein, in formula, each parameter declaration is as follows:
SA gathers materials specific surface area, unit m2/kg；
M1Dry aggregate sample quality, unit g；
M2Sample mass after plated film, unit g；
ρALThe density of aluminium coat material, unit g/cm3；
δhAluminum film nominal thickness, unit μm.
2. the method for testing of the specific surface area of gathering materials of a kind of asphalt according to claim 1, it is characterised in that the Side length accuracy of cube specimen described in step one requires as ± 2mm.
3. the method for testing of the specific surface area of gathering materials of a kind of asphalt according to claim 2, it is characterised in that cube specimen described in step 2 is placed in the baking oven that temperature is 105 DEG C and dries 3～4h.
4. the method for testing of the specific surface area of gathering materials of a kind of asphalt according to claim 3, it is characterised in that cube specimen described in step 2 is placed in the baking oven that temperature is 105 DEG C and dries 3.5h.
5. the method for testing of the specific surface area of gathering materials of a kind of asphalt according to claim 4, it is characterised in that test described in step 5 in the baking oven being placed in 105 DEG C that gathers materials and dry 3～4h.
6. the method for testing of the specific surface area of gathering materials of a kind of asphalt according to claim 5, it is characterised in that test described in step 5 in the baking oven being placed in 105 DEG C that gathers materials and dry 3.5h.
7. the method for testing of the specific surface area of gathering materials of a kind of asphalt according to claim 6, it is characterised in that test specimen quality described in step 2 is MoriIt is accurate to 0.001g, the test specimen mass M after plated film described in step 3coaIt is accurate to 0.001g, described in step 5, tests mass M of gathering materials1It is accurate to 0.001g, sample mass M after plated film in step 62It is accurate to 0.001g.
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| 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 |
| 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 |
| CN110619181B (en) * | 2019-09-23 | 2023-03-24 | 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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