CN103543090A - Method for testing surface energy of aggregate - Google Patents
Method for testing surface energy of aggregate Download PDFInfo
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- CN103543090A CN103543090A CN201310536172.6A CN201310536172A CN103543090A CN 103543090 A CN103543090 A CN 103543090A CN 201310536172 A CN201310536172 A CN 201310536172A CN 103543090 A CN103543090 A CN 103543090A
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Abstract
The invention relates to a method for testing surface energy of an aggregate. The method comprises the following steps: A. dividing an aggregate obtained from a quarry into samples with sizes being 5cm*5cm*1cm by a water sawing method; B. polishing the samples to obtain a smooth and flat surface; C. performing surface cleaning to the tested sample; and D. opening testing software, adjusting a sample table and performing the test. The early preparation process in the testing method adopted by the invention is simple, the testing condition is easy to control, the testing time is short, the data processing is simple, the variable coefficient of the testing result is low, and the data reproducibility is good. The testing method lays the foundation for accurately acquiring the surface energy parameter.
Description
Technical field
The invention belongs to road engineering field, be specifically related to a kind of method of testing of surface of aggregate energy.
Background technology
Along with popularizing of bituminous pavement, many case histories have proved that the Water Damage of bituminous pavement can seriously reduce Pavement Condition.Current evaluation method and index are all from macroscopic aspect, to judge the water stability quality of asphalt, and seldom from the mechanism of action, influence factor and water stability improvement measure and the mechanism of water, asphalt Water Damage process are studied.For this problem, foreign scholar explores by continuous, finds to adopt surface energy theory and method of testing to come the water stability of Research on Asphalt Mixture to have good effect.At present, domestic the research of Water Damage of Asphalt Pavement problem is mainly concentrated on pitch and gathers materials the exploration of adhesiveness and compound water stability macro-test method and index, if will analyze by the water stability to asphalt aspect microcosmic, not only need the surface of asphalt material method of testing to explore, also need the method for testing of surface of aggregate energy to explore simultaneously.Based on surface energy theory and method of testing thereof, use to adhere to simultaneously and peel off model and evaluation index, can probe into asphalt from thin sight angle and adhere to peeling property, thereby analyze stability of asphalt mixture energy, can provide basic basis for the research of asphalt Water Damage problem.
Summary of the invention
The object of the present invention is to provide a kind of surface of aggregate can method of testing, it is simple that this method of testing has test operation, test result is accurately credible, evaluation index mechanical meaning is the feature such as clearly.
The present invention solves above-mentioned technical matters by the following technical solutions:
A method of testing for surface of aggregate energy, concrete operation step is as follows:
(1), obtain the sample of certain specification shape, adopt the method for water saw to be divided into the sample of required specification gathering materials of obtaining from stone pit;
(2), sample is carried out to polishing, obtain smooth even curface, the sample that first uses buffing machine that step (1) is cut carries out polishing, then with clear water, rinses sample, after being dried, with waterproof abrasive paper, sample is further polished again, to obtain unified smooth surface of aggregate;
(3), test specimen surface cleaning used, first with the analysis absolute alcohol of getting ready in advance, step (2) gained sample is soaked, and then rinse with distilled water, finally put into 4.5 ~ 5.5h in 95 ~ 105 ℃ of baking ovens and dry, after taking out, place drying for standby;
(4), specimen ready after, carry out test solution selection, test solution instrument is contact angle instrument, chooses distilled water, ethylene glycol and formamide solution as known surface energy test liquid;
(5), open testing software, regulate sample stage to start to test, controlling probe temperature is 25 ℃, computing method adopt tangent method; In test, 1 sample only can carry out with a kind of liquid, and each sample is at least tested 3 above diverse locations, then averages; After all liq tests, record and preserve test data, obtain the contact angle of tested test specimen; Described tangent method refers to that testing software can generate an imaginary circles automatically, by regulating radius of a circle, adjusts the position of horizontal line and circle, and imaginary circles is overlapped to greatest extent with arc, and then testing software can calculate left and right contact angle value automatically.
In the present invention, the described water saw of step (1) refers to the device of the impulse force drive saw blade acting that utilizes flowing water.
In the present invention, contact angle instrument described in step (4) is the SL200B type contact angle instrument of U.S. Ke Nuo company limited research and development.
In the present invention, the described testing software of step (5) is the corresponding testing software of SL200B type contact angle instrument of U.S. Ke Nuo company limited research and development.
In the present invention, step is analyzed absolute alcohol described in (3), its ethanol content >=95%.
Beneficial effect of the present invention is: method of testing early-stage preparations process of the present invention is simple, and test condition is easily controlled, and the test used time is shorter, and data processing is comparatively simple, and the coefficient of variation of test result is low, and data reproduction is better.The present invention is parameter to lay a good foundation in the surface that Obtaining Accurate gathers materials.
Accompanying drawing explanation
Fig. 1 is the structural diagrams of sample of the present invention.
Fig. 2 is tangent method geometric representation.
Embodiment
For clearly a kind of method of testing of surface of aggregate energy, now in conjunction with a typical test, be illustrated.
Embodiment 1: gather materials and select Irish touchstone, diabase, ls, sandstone and grouan, the density of respectively gathering materials and water-intake rate are in Table 1, and test liquid is distilled water, ethylene glycol and formamide.
Concrete steps are as follows:
1, obtain the sample that requires size.Adopt the method for water saw to be divided into the sample of 5cm * 5cm * 1cm size gathering materials of obtaining from stone pit;
2, sample is carried out to polishing, obtain smooth even curface.First use buffing machine that the sample cutting is carried out to polishing, then with clear water, rinse sample, after being dried, with 240# waterproof abrasive paper, sample is further polished again, to obtain unified smooth surface of aggregate;
3, test specimen surface cleaning used.First with the analysis absolute alcohol (ethanol content >=95%) of getting ready in advance, sample is soaked, and then rinse with distilled water, finally put into 5h in 100 ℃ of baking ovens and dry, after taking out, place drying for standby;
4, specimen ready after, carry out test solution selection.Choose distilled water, ethylene glycol, formamide solution as known surface energy test liquid.
5, open testing software, regulate sample stage to start to test.Probe temperature is 25 ℃, and computing method adopt tangent method.In test, 1 sample only can carry out with a kind of liquid, and each sample is at least tested 3 above diverse locations, then averages.After all liq tests, record and preserve test data, obtain the contact angle of tested test specimen.
According to existing research, for given a certain solid, the surface of different liquids can with the long-pending γ of its contact angle cosine value at solid surface
lthe surface of cos θ and liquid can γ
lthere is good linear relationship, therefore can to test result, carry out validation verification by this relation.Above-mentioned 5 kinds are gathered materials and adopt methods of the present invention to carry out surface to test, obtain test liquid and various contact angle value and data validation of gathering materials the results are shown in Table 2.
The contact angle value that gained test result is known liquid and surface of aggregate can be tested in surface, needs further calculating just can obtain the surface energy parameter that this kind gathers materials.
According to Surface Physical Chemistry, the surface of liquid or solid can be expressed as van der Waals interaction parameter γ by γ
lWwith soda acid polarity operational factors γ
aBsum, soda acid polarity effect γ
aBcan be expressed as acidic group parameter γ
+with base parameter γ
-, physical relationship is shown in formula (1):
In formula: γ
lWrepresent intermolecular Van der Waals force (dipole-dipole force, induction force, dispersion force) effect; γ
aBrepresent Lewis soda acid power (ionic link, covalent bond) effect; γ
+and γ
-be respectively electron accepter, electron donor.
According to liquid-solid wetting property, organic solution can parameter meet following relational expression (2) with the surface gathering materials:
In formula:
for the surface of liquid can;
,
be respectively the Van der Waals force component gathering materials with liquid;
,
for gathering materials and the surface of the liquid acidic group in can parameter;
,
for gathering materials and the surface of the liquid base in can parameter; θ be gather materials and pitch between contact angle.
By consulting literatures and testing apparatus data bank obtain distilled water, ethylene glycol and formamide surface energy supplemental characteristic, in Table 3.
By the surface of three kinds of liquid can parameter and with the contact angle gathering materials, bring formula (2) into and obtain three prescription journeys, further solve an equation and can obtain in surface of aggregate energy parameter
,
,
, then carry it into formula (1) can try to achieve surface of aggregate can and Lewis acid-base function power, in Table 4.
Table 1 gather materials density and water-intake rate
| The kind of gathering materials | Irish touchstone | Diabase | Ls | Sandstone | Grouan |
| Apparent density (g/cm 3） | 2.916 | 2.789 | 2.717 | 2.651 | 3.027 |
| Water-intake rate (%) | 2.3 | 1.8 | 1.4 | 4.1 | 0.9 |
Table 2 surface of aggregate contact angle and data detection result
Three kinds of surface energy of liquid parameters at 25 ℃, table 3
| Liquid | γ l（mJ/m 2） | γ LW（mJ/m 2） | γ AB（mJ/m 2） | γ +（mJ/m 2） | γ -（mJ/m 2） |
| Distilled water | 72.8 | 21.6 | 51.0 | 25.5 | 25.5 |
| Ethylene glycol | 48.3 | 29.3 | 19.0 | 1.92 | 47 |
| Formamide | 58.2 | 39.5 | 18.7 | 2.28 | 39.6 |
Table 4 surface of aggregate energy parameter
| The kind of gathering materials | γ（mJ/m 2） | γ LW（mJ/m 2） | γ AB（mJ/m 2） | γ +（mJ/m 2） | γ -（mJ/m 2） |
| Irish touchstone | 32.21 | 32.21 | 0.00 | 0.00 | 28.87 |
| Diabase | 34.08 | 34.08 | 0.00 | 0.00 | 33.64 |
| Ls | 45.25 | 45.25 | 0.00 | 0.00 | 40.97 |
| Sandstone | 46.18 | 46.18 | 0.00 | 0.00 | 42.63 |
| Grouan | 29.48 | 29.48 | 0.00 | 0.00 | 24.66 |
Claims (5)
- Surface of aggregate can a method of testing, it is characterized in that concrete operation step is as follows:(1), obtain the sample of certain specification shape, adopt the method for water saw to be divided into the sample of required specification gathering materials of obtaining from stone pit;(2), sample is carried out to polishing, obtain smooth even curface, the sample that first uses buffing machine that step (1) is cut carries out polishing, then with clear water, rinses sample, after being dried, with waterproof abrasive paper, sample is further polished again, to obtain unified smooth surface of aggregate;(3), test specimen surface cleaning used, first with the analysis absolute alcohol of getting ready in advance, step (2) gained sample is soaked, and then rinse with distilled water, finally put into 4.5 ~ 5.5h in 95 ~ 105 ℃ of baking ovens and dry, after taking out, place drying for standby;(4), specimen ready after, carry out test solution selection, test solution instrument is contact angle instrument, chooses distilled water, ethylene glycol and formamide solution as known surface energy test liquid;(5), open testing software, regulate sample stage to start to test, controlling probe temperature is 25 ℃, computing method adopt tangent method; In test, 1 sample only can carry out with a kind of liquid, and each sample is at least tested 3 above diverse locations, then averages; After all liq tests, record and preserve test data, obtain the contact angle of tested test specimen; Described tangent method refers to that testing software can generate an imaginary circles automatically, by regulating radius of a circle, adjusts the position of horizontal line and circle, and imaginary circles is overlapped to greatest extent with arc, and then testing software can calculate left and right contact angle value automatically.
- 2. method according to claim 1, is characterized in that the described water saw of step (1) refers to the device of the impulse force drive saw blade acting that utilizes flowing water.
- 3. method according to claim 1, is characterized in that contact angle instrument described in step (4) is SL200B type contact angle instrument.
- 4. method according to claim 1, is characterized in that the described testing software of step (5) is the corresponding testing software of SL200B type contact angle instrument.
- 5. method according to claim 1, is characterized in that described in step (3), analyzing absolute alcohol, its ethanol content >=95%.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806749A (en) * | 2016-03-18 | 2016-07-27 | 交通运输部公路科学研究所 | Asphalt and ore material adhesivity evaluating method based on surface free energy theory |
| CN109724898A (en) * | 2019-01-30 | 2019-05-07 | 湖北中烟工业有限责任公司 | A kind of detection method of cigarette tipping paper surface wettability |
| CN111855497A (en) * | 2020-06-24 | 2020-10-30 | 同济大学 | Method for testing surface energy parameters of hot-melt asphalt |
| CN112345414A (en) * | 2020-10-21 | 2021-02-09 | 武汉理工大学 | Method for determining surface energy of particle aggregate, storage medium and system |
| CN113567306A (en) * | 2021-07-15 | 2021-10-29 | 武汉理工大学 | Aggregate surface energy prediction calculation method |
| WO2022156256A1 (en) * | 2021-01-20 | 2022-07-28 | 武汉理工大学 | Method and system for selecting chemical reagent in surface energy test of asphalt material |
| CN115979902A (en) * | 2023-01-30 | 2023-04-18 | 北京建筑大学 | Method for evaluating wrapping effect of cold-mixed asphalt and aggregate at normal temperature |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865807A (en) * | 2010-04-15 | 2010-10-20 | 上海梭伦信息科技有限公司 | Apparatus and method for testing solid-liquid dynamic and static contact angles by actual liquid droplet method |
-
2013
- 2013-11-01 CN CN201310536172.6A patent/CN103543090A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865807A (en) * | 2010-04-15 | 2010-10-20 | 上海梭伦信息科技有限公司 | Apparatus and method for testing solid-liquid dynamic and static contact angles by actual liquid droplet method |
Non-Patent Citations (1)
| Title |
|---|
| 魏建明: "沥青、集料的表面自由能及水分在沥青中的扩散研究", 《中国博士学位论文全文数据库 工程科技II辑》, no. 2, 15 February 2010 (2010-02-15) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806749A (en) * | 2016-03-18 | 2016-07-27 | 交通运输部公路科学研究所 | Asphalt and ore material adhesivity evaluating method based on surface free energy theory |
| CN109724898A (en) * | 2019-01-30 | 2019-05-07 | 湖北中烟工业有限责任公司 | A kind of detection method of cigarette tipping paper surface wettability |
| CN111855497A (en) * | 2020-06-24 | 2020-10-30 | 同济大学 | Method for testing surface energy parameters of hot-melt asphalt |
| CN111855497B (en) * | 2020-06-24 | 2023-06-20 | 同济大学 | Hot-melt asphalt surface energy parameter testing method |
| CN112345414A (en) * | 2020-10-21 | 2021-02-09 | 武汉理工大学 | Method for determining surface energy of particle aggregate, storage medium and system |
| WO2022156256A1 (en) * | 2021-01-20 | 2022-07-28 | 武汉理工大学 | Method and system for selecting chemical reagent in surface energy test of asphalt material |
| CN113567306A (en) * | 2021-07-15 | 2021-10-29 | 武汉理工大学 | Aggregate surface energy prediction calculation method |
| CN115979902A (en) * | 2023-01-30 | 2023-04-18 | 北京建筑大学 | Method for evaluating wrapping effect of cold-mixed asphalt and aggregate at normal temperature |
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Application publication date: 20140129 |