CN106932651A - Irregular shape is gathered materials the detection method of dielectric constant - Google Patents
Irregular shape is gathered materials the detection method of dielectric constant Download PDFInfo
- Publication number
- CN106932651A CN106932651A CN201710179488.2A CN201710179488A CN106932651A CN 106932651 A CN106932651 A CN 106932651A CN 201710179488 A CN201710179488 A CN 201710179488A CN 106932651 A CN106932651 A CN 106932651A
- Authority
- CN
- China
- Prior art keywords
- paraffin
- dielectric constant
- materials
- gathered materials
- irregular shape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2617—Measuring dielectric properties, e.g. constants
Abstract
The invention discloses the detection method of the dielectric constant that gathers materials irregular shape.Comprise the following steps：Irregular shape is gathered materials to mix with atoleine after weighing and pours into mould, cooling obtains the regular paraffin of shape and the two-phase mixture that gathers materials；Simultaneously a paraffin refined wax sample is prepared using equal dies；By obtaining the density of solid paraffin to samples weighing and calculating volume, paraffin is further calculated with paraffin in the two-phase mixture that gathers materials and the volume ratio gathered materials；Determine the dielectric constant values of paraffin refined wax sample and two-phase mixture respectively by dielectric constant test system；Derive the linear model of composite, the dielectric constant formula gathered materials.Test method of the present invention is simple and convenient, can determine the dielectric constant that irregular shape is gathered materials, significant for Research on Asphalt Mixture dielectric properties, lifting GPR accuracy of detection and application.Its requirement that reality can be met from the reasonability, the convenience of test operation of testing program.
Description
Technical field
The invention belongs to field of road, it is related to a kind of irregular shape to gather materials dielectric constant detection method.
Background technology
With the gradual perfection of highway in China infrastructure, build peak period and gradually decorporate.On the one hand road is being built
Environment of building with planning road focuses mostly in Midwest geographical environment compared with the area in hardship, to Construction control and the requirement phase of quality
Than stricter in the past；The another aspect thing followed is that substantial amounts of road needs to conserve and repairs, and highway builds up and comes into operation
Afterwards, because bearing load and abrasion and the influence of various natural causes of wheel repeatedly, crack, come to nothing, it is depression, passage, loose
Etc. disease generally existing, quality testing is particularly important, and this requires that the process of quality testing can not only guiding construction control
System, and can be supported for the data that highway maintenance management provides science.As can be seen here, carry out the detection of road quality and evaluate
Just it is particularly important, while also faster, more efficient, more accurate Road Detection means should be sought according to actual needs.
Road quality detection method common at present includes core boring sampling method, PQI densitometer methods, Nuclear Gauge densimetry etc., but this is several
The method of kind has certain limitation in terms of specific practical application.Core boring sampling method efficiency is low, speed is slow and can be right
Cause certain infringement in road surface；PQI densitometer methods are absorbed and loss situation has differences due to electromagnetic wave energy, are easily caused knot
Fruit deviation, and measurement efficiency is not high；Nuclear Gauge densimetry has radioactivity due to radioactive source, unfavorable to health, simultaneously because putting
The decay in source is penetrated, measurement result is bigger than normal compared with actual value.GPR as a kind of new non-destructive detecting device, using hyperfrequency
The transmitting of electromagnetic wave with reception technique as core technology, have concurrently colleges and universities, rapidly, continuously, each side such as low cost, accuracy be high
Advantage, has become the important component of road Dynamic Non-Destruction Measurement, and can effectively meet the field and continue to develop at present
Demand.But at present its be Preliminary Applications in road structure thickness degree context of detection, it is not high in the application precision of other side.
The difference of ground surface material dielectric property is the prerequisite of Ground Penetrating Radar application, and the back wave that radar is received is to be situated between
The function of matter dielectric property, explanation, interpretation and the inverting of road pavement radar image data are all based on dividing for medium dielectric property
Analysis.GPR can not Direct Recognition go out the performance indications such as Laminate construction thickness, compactness, water content, but can be based on it is right
The research of road surface structare layer dielectric material characteristic is realized.
It is well known that asphalt by gathering materials, the three-phase composite body that constitutes of pitch and air, wherein gathering materials in pitch
More than 90% is accounted in the constituent of compound, is also the leading factor for determining asphalt compound dielectric.It is existing
Compound dielectric model can not well meet engineering reality, therefore the dielectric constant that measure is gathered materials can help correct existing
Some compound dielectric models, so as to lift the accuracy of detection of GPR, make it preferably be applied to engineering reality.But by
Irregular shape is there is in surface of aggregate, it is difficult to carry out the measure of dielectric constant to it.
The domestic research for the field is few, is concentrated mainly on the aspects such as microwave remote sensing, geological exploration and oil well logging,
And object is generally the typical features such as water, rock, soil, the mixture of many material compositions this for asphalt not mistake
Many researchs.Zhang Junrong, Zhang Dehai, Wang Li Wei of Changchun Institute of Geography Chinese Science Academy's microwave remote sensing room etc. is in microwave remote sensing
The dielectric constant of target and background is studied, and gives the dielectric constant of some typical features such as pure water, rock, soil etc.
Formula and model；Kang Shifeng, Sun Fang, Luo Xianyun of The 22nd Reserch Institute Of China Electronics Technology Group Corporation etc. are using coaxial probe dielectric constant measurement system
System is measured, gives several typical features such as measurement of the dielectric constant such as sand, rock, trees and analysis result；Grand celebration
The Li Jianhao applications electric field theory of Logging Company of Petroleum Authority studies the electrical of mixture, has drawn the dielectric constant of mixture
Depending on the average and variance of each constituent dielectric constant, give mixture dielectric constant formula and carried out having effect
Card.Comparatively speaking, the external dielectric property aspect for pavement structure layer material has done more research work.1994,
Virginia Tech once carried out a scientific research project, and the main purpose of project research is to be best understood from cement concrete
Dielectric property and concrete influence of the constituent to its dielectric constant；Nineteen ninety-five, Robert et.al. are large-scale using one
Broadband coaxial line measures the compound dielectric of cement concrete, have studied influence of the curing time for complex dielectric permittivity；
Rhim had also once carried out experimental study in 1998 to the relation between concrete moisture content and compound dielectric.
Therefore, a kind of method of the Dielectric Coefficient that irregularly gathered materials is badly in need of now, can intactly reflects whole
The individual dielectric property gathered materials, so as to preferably reflect the composite dielectric characteristic of asphalt, amendment asphalt is compound to be situated between
The model of electric constant, lifting GPR expands engineer applied scope for the accuracy that road quality is detected.
The content of the invention
Present invention aim at the test method that a kind of dielectric constant that can gather materials irregular shape of offer is detected,
The whole dielectric property gathered materials can intactly be reflected, so that reflect the composite dielectric characteristic of asphalt, amendment pitch mixing
Material compound dielectric model, is that GPR detects that road quality and the precision of parameters are provided fundamental basis.
It is as follows using technical scheme to reach above-mentioned purpose：
Irregular shape is gathered materials the detection method of dielectric constant, comprised the following steps：
Irregular shape is gathered materials to mix with atoleine after weighing and pours into mould, cooling obtain the regular paraffin of shape with
Gather materials two-phase mixture；Simultaneously a paraffin refined wax sample is prepared using equal dies；Obtained by samples weighing and calculating volume
To the density of solid paraffin, paraffin is further calculated with paraffin in the two-phase mixture that gathers materials and the volume ratio gathered materials；
Determine the dielectric constant values of paraffin refined wax sample and two-phase mixture respectively by dielectric constant test system；
Derive the linear model ε of compositeap=εaθa+εpθp, the dielectric constant formula gathered materials：
Wherein, εaIt is the dielectric constant for gathering materials；θaIt is the volume accounting gathered materials；εapIt is the dielectric constant of mixture；θpIt is stone
The volume accounting of wax；εpIt is the dielectric constant of paraffin.
By such scheme, the atoleine is the uniform liquid of 65-75 DEG C of temperature.
By such scheme, the mould is cylinder, square or cuboid.
By such scheme, the density of solid paraffin is obtained by the measure and calculation to paraffin refined wax sample quality and volume.
By such scheme, paraffin gets by the following method with paraffin in the two-phase mixture that gathers materials and the volume ratio gathered materials：
Obtain the density and paraffin of solid paraffin and gather materials by the measure and calculation to paraffin refined wax sample quality and volume
The volume of two-phase mixture；
Paraffin is weighed with the two-phase mixture that gathers materials, is subtracted and is measured the quality that the quality gathered materials obtains solid paraffin in advance,
The volume shared by solid paraffin is obtained in the case of known solid paraffin density, the body that irregular shape is gathered materials further is obtained
Product.
Glass mold needs to carry out cleaning treatment, in case impurity produces influence to measurement result.
Molded samples whole process it is noted that the time can not too long, in case atoleine temperature reduction after form solid
State and air inlet, influence test effect.
When unnecessary paraffin is removed, it is necessary to carefully conscientiously, be sure not that sample shape is caused to damage.
When being measured to sample permittivity using dielectric constant test system, it is necessary to stabilization is same in same voltage
Under frequency state, voltage, the interference of frequency are excluded.
, by wax coating method, being gathered materials for irregular shape using the paraffin refined wax that can measure dielectric constant, it is whole to carry out for the present invention
Shape is transformed so that its measure that mixture overall dielectric constant can be directly carried out using dielectric constant test system, then
The whole dielectric constant values for gathering materials are obtained by the linear model being derived by.
Consumptive material and raw material are conveniently easy to get needed for of the present invention, and paraffin refined wax is recycled after can also heating.Entirely
Process of the test is simple, and whole sample formation and Dielectric Coefficient experiment are time-consuming shorter, counts indoor cool time typically time-consuming 1 in
~2 days, can simultaneously be molded and analyze with multiple samples, be effectively saved the time.
The present invention has the beneficial effect that：
Test method of the present invention is simple and convenient, can determine the dielectric constant that irregular shape is gathered materials, right
It is significant in Research on Asphalt Mixture dielectric properties, lifting GPR accuracy of detection and application.It is from experiment side
Being seen in the reasonability of case, the convenience of test operation can meet the requirement of reality.
This test operation is easy, and sample formation and minute are shorter.
Rationally, external environmental interference is smaller for bulk testing flow, tests with a high credibility.
Specific embodiment
Following examples further explain technical scheme, but not as limiting the scope of the invention.
Prepare paraffin refined wax, paraffin and aggregate mix test specimen
Experiment is gathered materials using two kinds and does parallel test, and a kind of is that, from the prosperous diabase of Hubei stone, one kind is from lake
The conglomerate in northern Honghu, what is used is 4.75mm~9.5mm grades and gathers materials, it is every kind of respectively take 10 respectively and gather materials be numbered.
Gather materials and cleaning impurity is cleaned with water purification, place and carry out natural air drying treatment at room temperature after cleaning, while by appropriate solid stone
Wax is imported in clean beaker, is positioned in 70 DEG C of baking oven and is heated.Take the diameter that 15 homogeneous, shape is regular
26.8mm, the glass mold of height 10mm when heating paraffin is into uniform liquid condition, is first conducted into glass mold bottom
Until be completely paved with bottom, then will gather materials and be put into according to suitable angle, and as far as possible at centre position.Gather materials and placed
Placed after atoleine is imported in glass mold until full state is presented after finishing and stood at room temperature.The system of paraffin refined wax sample
Make more easy, directly atoleine is imported and is placed under room temperature state to after full state is presented in glass mold.Deng
When sample is cooled into solid state at room temperature, takes off glass mold and remove paraffin overflow, influence global shape,
So that sample is the cylinder of same specification standards.So far, paraffin refined wax, paraffin and aggregate mix test specimen have made
Finish.
Calculating is gathered materials and paraffin volume ratio
Clean gather materials juxtaposition at room temperature air-dry after, its quality is called Ma.It is unnecessary and spilling when pouring is removed
Paraffin obtains a diameter of 26.8mm of rule, and a height of 10mm's gathers materials with after the two-phase mixture of paraffin, weighs two-phase mixture
The mass M of sample, obtains Quality of Paraffin Waxes Mp=M-Ma.Paraffin refined wax sample is weighed simultaneously, obtains its mass Mp′, and its volume is glass
Glass mould volume is vp′=2 π r2H, therefore this kind of density of paraffin can be obtained according to formula.Obtaining again can after the density of paraffin
In the hope of the volume of paraffin in blend sample, then volume of gathering materials is vx=vp′-vp, paraffin can be obtained with the volume ratio gathered materials.
Result of the test is as shown in table 1 below.
The each group of table 1 is gathered materials and paraffin volume ratio
Determination sample dielectric constant
Experiment is using the dielectric constant test system of the outstanding Electronic Science and Technology Co., Ltd.'s Development and Production in Changsha three to the specification sample
The dielectric constant of product is measured, and is then equally formed using the method sealed with wax with other sensing equipments and meets Instrument specification requirement
Sample.
First, screw is loosened, lifting test platform fixture rises to certain altitude, and obtained sample is put into fixture
In articles holding table and it is allowed to be fully contacted with electrode.Secondly, regulating frequency and knob, find the frequency and electricity under optimum state
Pressure value, enables the dielectric constant data stablized.Meanwhile, measurement scheme is created, it is input into volume data and measurement data
Need, to ensure being smoothed out for experiment.Finally, the measure of dielectric constant is carried out for each sample according to this under the optimal condition.
Gather materials the calculating of dielectric constant
After being measured to each sample, arrange and obtain each group dielectric constant data as shown in table 2.
The each group mixture dielectric constant data of table 2
Additionally, the dielectric constant for obtaining paraffin refined wax is 2.09.
By deriving the conventional linear model of composite, the dielectric constant formula gathered materials：Can be obtained gathering materials the actual value of dielectric constant according to this formula, and each group is gathered materials dielectric constant values such as table 3 below institute
Show.
The each group of table 3 is gathered materials dielectric constant data
Due to it is each it is single gather materials between material composition it is incomplete same, its dielectric constant values has certain difference in itself
It is different, also simultaneously because the apparent characteristic that gathers materials can produce certain influence for the measure of dielectric constant, even if this selection is
Specification is neat and meets the difference that still there is dielectric constant between engineering is actual to gather materials, but each gathers materials.
Shown according to existing dielectric constant of rock data information, doleritic dielectric constant is 10~12, Jie of conglomerate
Electric constant is 4~6, therefore understands that the testing program meets reality by contrast, and confidence level is higher.
In sum, this result of the test reflects two important contents.First is due to the apparent characteristic of itself that gathers materials
In the presence of, certain energy loss can be caused when GPR carries out Road Detection, the measure of its dielectric constant is influenceed, therefore subsequently
Can again be furtherd investigate in terms of the apparent characteristic that gathers materials is for dielectric constant influence；Second is to change not advising by the way of sealing with wax
The detection method confidence level that the shape of itself of then gathering materials carries out dielectric constant is higher, can on this basis further investigate and correct
The dielectric property composite model of asphalt, for the detection accuracy and the widespread popularity that lift GPR provide theory according to
According to.
Claims (5)
1. pair irregular shape is gathered materials the detection method of dielectric constant, it is characterised in that comprised the following steps：
Irregular shape is gathered materials to mix with atoleine after weighing and pours into mould, cooling obtains the regular paraffin of shape and gathers materials
Two-phase mixture；Simultaneously a paraffin refined wax sample is prepared using equal dies；Consolidated by samples weighing and calculating volume
The density of body paraffin, is further calculated paraffin with paraffin in the two-phase mixture that gathers materials and the volume ratio gathered materials；
Determine the dielectric constant values of paraffin refined wax sample and two-phase mixture respectively by dielectric constant test system；
Derive the linear model ε of compositeap=εaθa+εpθp, the dielectric constant formula gathered materials：
Wherein, εaIt is the dielectric constant for gathering materials；θaIt is the volume accounting gathered materials；εapIt is the dielectric constant of mixture；θpIt is paraffin
Volume accounting；εpIt is the dielectric constant of paraffin.
2. irregular shape gathered materials as described in right will go 1 the detection method of dielectric constant, it is characterised in that the liquid stone
Wax is the uniform liquid of 65-75 DEG C of temperature.
3. irregular shape gathered materials as described in right will go 1 the detection method of dielectric constant, it is characterised in that the mould is
Cylinder, square or cuboid.
4. irregular shape gathered materials as described in right will go 1 the detection method of dielectric constant, it is characterised in that solid paraffin
Density is obtained by the measure and calculation to paraffin refined wax sample quality and volume.
5. irregular shape gathered materials as described in right will go 1 the detection method of dielectric constant, it is characterised in that paraffin with gather materials
Paraffin gets by the following method with the volume ratio gathered materials in two-phase mixture：
The density and paraffin and two-phase of gathering materials of solid paraffin are obtained by the measure and calculation to paraffin refined wax sample quality and volume
The volume of mixture；
Paraffin is weighed with the two-phase mixture that gathers materials, is subtracted and is measured the quality that the quality gathered materials obtains solid paraffin in advance, it is known that
The volume shared by solid paraffin is obtained in the case of solid paraffin density, the volume that irregular shape is gathered materials further is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710179488.2A CN106932651A (en) | 2017-03-23 | 2017-03-23 | Irregular shape is gathered materials the detection method of dielectric constant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710179488.2A CN106932651A (en) | 2017-03-23 | 2017-03-23 | Irregular shape is gathered materials the detection method of dielectric constant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106932651A true CN106932651A (en) | 2017-07-07 |
Family
ID=59425209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710179488.2A Pending CN106932651A (en) | 2017-03-23 | 2017-03-23 | Irregular shape is gathered materials the detection method of dielectric constant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106932651A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108656330A (en) * | 2018-07-12 | 2018-10-16 | 上海建工集团股份有限公司 | Concrete prefabricated element maintenance monitoring and quality evaluating method and system |
| CN108828588A (en) * | 2018-04-16 | 2018-11-16 | 长沙理工大学 | A method of with 3D Ground Penetrating Radar evaluation path technology status |
| CN108931562A (en) * | 2018-06-15 | 2018-12-04 | 武汉理工大学 | A kind of lossless detection method of the uneven mixture dielectric constant of pair of large scale |
| CN110361427A (en) * | 2019-08-12 | 2019-10-22 | 武汉理工大学 | A kind of asphalt mixture gradation evaluation method based on dielectric property |
| CN110927222A (en) * | 2019-11-28 | 2020-03-27 | 武汉理工大学 | Asphalt mixture quality evaluation method for quantifying temperature and frequency influence factors |
| CN111289804A (en) * | 2020-03-03 | 2020-06-16 | 西南交通大学 | Method for evaluating correlation between transformer oil paper insulation dielectric response and paraffin content |
| CN111350947A (en) * | 2020-03-31 | 2020-06-30 | 西安交通大学 | Embedded water supply heat supply pipeline leakage detection method based on microwave detection technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011137115A (en) * | 2009-12-29 | 2011-07-14 | Showa Shell Sekiyu Kk | Gasoline fuel composition |
| CN104931547A (en) * | 2015-06-30 | 2015-09-23 | 中国矿业大学 | Experimental analysis method for microwave response characteristics of high-sulfur coal and sulfur-containing model compound |
| CN105137199A (en) * | 2015-09-16 | 2015-12-09 | 北京工商大学 | Network analyzer-based dielectric constant measuring method |
| CN105699787A (en) * | 2016-03-04 | 2016-06-22 | 中国矿业大学 | Coal rock dielectric constant measure method based on impedance analyzer |
-
2017
- 2017-03-23 CN CN201710179488.2A patent/CN106932651A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011137115A (en) * | 2009-12-29 | 2011-07-14 | Showa Shell Sekiyu Kk | Gasoline fuel composition |
| CN104931547A (en) * | 2015-06-30 | 2015-09-23 | 中国矿业大学 | Experimental analysis method for microwave response characteristics of high-sulfur coal and sulfur-containing model compound |
| CN105137199A (en) * | 2015-09-16 | 2015-12-09 | 北京工商大学 | Network analyzer-based dielectric constant measuring method |
| CN105699787A (en) * | 2016-03-04 | 2016-06-22 | 中国矿业大学 | Coal rock dielectric constant measure method based on impedance analyzer |
Non-Patent Citations (5)
| Title |
|---|
| 万果果 等: "粮堆密度的电磁波检测技术研究", 《农业机械》 * |
| 刘元生: "《山东地球物理六十年》", 30 September 2010 * |
| 卢会湘: "低密度0，-Sialon复相陶瓷的原位合成与性能研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 杨兵: "基于改进介电常数模型的沥青路面面层压实度反演", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 雷永鹏: "先驱体转化法制备氮化硼纤维研究", 《中国博士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828588A (en) * | 2018-04-16 | 2018-11-16 | 长沙理工大学 | A method of with 3D Ground Penetrating Radar evaluation path technology status |
| CN108931562A (en) * | 2018-06-15 | 2018-12-04 | 武汉理工大学 | A kind of lossless detection method of the uneven mixture dielectric constant of pair of large scale |
| CN108931562B (en) * | 2018-06-15 | 2021-01-19 | 武汉理工大学 | Nondestructive testing method for dielectric constant of large-size uneven mixture |
| CN108656330A (en) * | 2018-07-12 | 2018-10-16 | 上海建工集团股份有限公司 | Concrete prefabricated element maintenance monitoring and quality evaluating method and system |
| CN110361427A (en) * | 2019-08-12 | 2019-10-22 | 武汉理工大学 | A kind of asphalt mixture gradation evaluation method based on dielectric property |
| CN110927222A (en) * | 2019-11-28 | 2020-03-27 | 武汉理工大学 | Asphalt mixture quality evaluation method for quantifying temperature and frequency influence factors |
| CN111289804A (en) * | 2020-03-03 | 2020-06-16 | 西南交通大学 | Method for evaluating correlation between transformer oil paper insulation dielectric response and paraffin content |
| CN111289804B (en) * | 2020-03-03 | 2021-02-19 | 西南交通大学 | Method for evaluating correlation between transformer oil paper insulation dielectric response and paraffin content |
| CN111350947A (en) * | 2020-03-31 | 2020-06-30 | 西安交通大学 | Embedded water supply heat supply pipeline leakage detection method based on microwave detection technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106932651A (en) | Irregular shape is gathered materials the detection method of dielectric constant | |
| Zhao et al. | Investigation of moisture transport in cement-based materials using low-field nuclear magnetic resonance imaging | |
| Chen et al. | Determination of water content in fresh concrete mix based on relative dielectric constant measurement | |
| CN104965063B (en) | A kind of early-age concrete maintenance quality detection method based on Time Domain Reflectometry | |
| CN104792651B (en) | Soil limit moisture content automatic detection device | |
| WO2022105321A1 (en) | Asphalt mixture quality evaluation method based on temperature-frequency equivalent model | |
| CN103344526B (en) | A kind of asphalt workability index tester and method of testing | |
| CN103033453A (en) | Method for measuring voidage of asphalt concrete pavement core | |
| CN106908489A (en) | A kind of non-destructive determination method of grinding coagulation soil moisture content | |
| CN109668922A (en) | A kind of frozen soil model test monitoring device and its application method | |
| CN110927222A (en) | Asphalt mixture quality evaluation method for quantifying temperature and frequency influence factors | |
| CN105806749A (en) | Asphalt and ore material adhesivity evaluating method based on surface free energy theory | |
| Tsheko et al. | Calibration of a frequency-domain reflectometer for determining soil-water content in a clay loam soil | |
| CN112485789A (en) | Asphalt pavement compactness detection method based on three-dimensional ground penetrating radar | |
| CN113075250A (en) | Normal temperature heat conductivity coefficient prediction model | |
| Yu et al. | Design and evaluation of a thermo-TDR probe for geothermal applications | |
| Meng et al. | Theoretical analyses and experimental research on a cement concrete dielectric model | |
| CN107653760B (en) | Emulsified asphalt bonding layer for measuring surface layer thickness by radar | |
| CN108931562B (en) | Nondestructive testing method for dielectric constant of large-size uneven mixture | |
| CN105842121A (en) | Method for determining best mixing temperature of asphalt mixture based on wetting theory | |
| Zhong et al. | Composite dielectric model for cement concrete considering water saturation | |
| Liu et al. | Investigation of adhesion property between asphalt binder and aggregate using modified boiling methods for hot and wet area | |
| Zhang et al. | Estimation of soil-water characteristic curve for cohesive soils with methylene blue value | |
| Qin et al. | Development and application of TDR mini-probes for monitoring moisture in small-scale laboratory tests | |
| Pei et al. | Uniformity evaluation of asphalt pavements in hot and humid areas based on ground-penetrating radar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170707 |
|
| RJ01 | Rejection of invention patent application after publication |