CN106767629A

CN106767629A - A kind of method for obtaining asphalt membrane thickness

Info

Publication number: CN106767629A
Application number: CN201611036977.4A
Authority: CN
Inventors: 蒋应军; 赵淑敏; 杨超群; 陈瑞亭; 王敏
Original assignee: Changan University
Current assignee: Changan University
Priority date: 2016-11-23
Filing date: 2016-11-23
Publication date: 2017-05-31
Anticipated expiration: 2036-11-23
Also published as: CN106767629B

Abstract

The invention provides a kind of method for obtaining asphalt membrane thickness, pitch the mixing bitumen content and relative density gathered materials are determined first, then sieve pitch mixing and gather materials, according to the grain size for gathering materials, obtain some shelves point meter gathered materials with corresponding shelves that gathers materials and tail over ratio.Then point meter that the specific surface area coefficient and corresponding shelves that some shelves that will be obtained gather materials gather materials is tailed over after ratio is multiplied and is added summation, is obtained pitch and is mixed specific surface area of gathering materials；The pitch is mixed into pitch relative density under the conditions of specific surface area of gathering materials, pitch mix the bitumen content and 25 DEG C gathered materials respectively and substitutes into formula, obtain asphalt membrane thickness.The result of embodiments of the invention shows that the optimum oil-stone ratio that the asphalt membrane thickness that the determination method that the pitch provided using the present invention mixes the film thickness that gathers materials is obtained is calculated mixes between the error 0.0~1.0% of the actual optimum oil-stone ratio for gathering materials with corresponding pitch.

Description

A kind of method for obtaining asphalt membrane thickness

Technical field

The invention belongs to asphalt applications technical field, more particularly to a kind of method for obtaining asphalt membrane thickness.

Background technology

After the interphase interaction of pitch and mineral aggregate, pitch is asphalt structure in the structure pitch that mineral aggregate surface produces The determinant of formation, the pitch being wrapped in surface of aggregate must reach certain thickness and just can guarantee that asphalt has foot Enough durability, and compound level with and asphalt optimum content influenceed by asphalt membrane thickness, and affect compound The adhesiveness gathered materials with pitch.Therefore, the determination of asphalt membrane thickness has directive significance for the raising that pitch mixes performance of gathering materials.

The method of asphalt membrane thickness is obtained at present mainly using Asphalt absorption divided by total surface area of gathering materials, and pitch is mixed Intersection material gather materials specific surface area determination method mainly have specific surface area Y-factor method Y, density calculating method, amendment specific surface area coefficient Method etc..Specific surface area that what specific surface area Y-factor method Y was obtained gather materials is too small, larger with actual deviation；Be given in density determining method Coefficient is recommended to set up on measured result basis, with《Standard specification for construction and acceptance of highway asphalt pavement》(JTG F40-2004) (with Lower abbreviation specification) in the typical coefficient that is given there is bigger difference, and using a point meter screen over-size during calculating, not The sieve aperture percent of pass used in specification；Amendment specific surface area Y-factor method Y, will be different during shape hypothesis is carried out to gathering materials Gather materials and be defined as uniform shapes, the larger error of bad student.

China pitch mixing utilization that specific surface area calculated in universal code requirement of gathering materials is gathered materials specific surface area coefficient Determination method：By the minimum grain size that gathers materials for premised on 0.030mm, the middle particle diameter that gathers materials is more than the surface area coefficient of 4.75mm parts 0.0041 is taken as, and is only calculated once during calculating, i.e., particle diameter is 0.41m more than the specific surface area that 4.75mm gathers materials²/ kg；4.75mm parts are less than for particle diameter, are added up again after the percent of pass of each sieve aperture is multiplied with surface area coefficient, you can with To the part specific surface area, finally two parts specific surface area is added, that is, obtains overall specific surface area of gathering materials.

But because the aspects such as processing technology are continually changing, ore powder granularity is continuously increased, the minimum with canonical derivation method Particle diameter assumes to occur in that deviation that this causes that the specific surface area derived occurs in that larger gap with actual measurement specific surface area of gathering materials. This also causes that the asphalt membrane thickness for obtaining is inaccurate.Furthermore, the asphalt membrane of traditional sense is calculated and simply considers effective bitumen, and Do not account for influence of the structure pitch to asphalt membrane thickness, so cause the asphalt membrane thickness that is calculated based on this compared with It is small, there is gap with actual observation thickness is carried out to the test specimen for preparing using SEM (SEM).

The content of the invention

In view of this, it is an object of the invention to provide a kind of method for obtaining asphalt membrane thickness, the side that the present invention is provided The asphalt membrane thickness accuracy that method is obtained is high, high with actual measurement film thickness compatibility.

In order to realize foregoing invention purpose, the present invention provides following technical scheme：

The invention provides a kind of method for obtaining asphalt membrane thickness, it is characterised in that comprise the following steps：

(1) determine pitch and mix pitch relative density under the conditions of the bitumen content and 25 DEG C gathered materials；

(2) screening pitch mixing is gathered materials, and according to the grain size for gathering materials, is obtained some shelves and is gathered materials and dividing that corresponding shelves gather materials Meter tails over ratio；

(3) the specific surface area coefficient that some shelves that the step (2) is obtained gather materials is tailed over point meter that corresponding shelves gather materials Ratio is added summation after being multiplied, and obtains pitch and mixes specific surface area of gathering materials；

Some shelves gather materials gather materials including thick shelves, ultra-fine shelves gather materials and gather materials with middle-grade；

The particle diameter that the thick shelves gather materials is not less than 2.36mm；

The particle diameter that the ultra-fine shelves gather materials is less than 0.15mm；

The middle-grade particle diameter for gathering materials is not less than 0.15mm and less than 2.36mm；

(4) pitch is mixed under the conditions of specific surface area of gathering materials, pitch mixes the bitumen content gathered materials and 25 DEG C respectively Pitch relative density substitutes into formula shown in Formulas I, obtains asphalt membrane thickness.

DA described in formula I is asphalt membrane thickness；

The SA is the specific surface area that pitch mixing is gathered materials；

The P_bFor the bitumen content that pitch mixing is gathered materials；

The γ_bIt is pitch relative density under the conditions of 25 DEG C；

It is that some shelves to gather materials and account for corresponding institute by the oversize of corresponding grain size sieve aperture that described point of meter tails over ratio State the mass percent that pitch mixing is gathered materials.

Preferably, it is that different shelves gather materials by corresponding grain size sieve aperture that point meter that some shelves gather materials tails over ratio The quality of oversize accounts for the percentage that the pitch mixes gross mass of gathering materials.

Preferably, the specific surface area coefficient that the thick shelves gather materials is fixed specific surface area coefficient.

Preferably, the fixed specific surface area coefficient is obtained according to the method for comprising the following steps:

A () is gathered materials the thick shelves and is sieved, according to the grain size for gathering materials, obtain some secondary of the coarse aggregate Shelves；

B () weighs respectively to the coarse aggregate of some secondary shelves, obtain the coarse aggregate of some secondary shelves Quality；

C () is scanned respectively to the coarse aggregate of some secondary shelves, obtain the coarse aggregate of some secondary shelves Scanning figure；

D () obtains the table of the coarse aggregate of some secondary shelves according to the scanning figure of the coarse aggregate of some secondary shelves Area；

(e) according to the quality of the coarse aggregate of the surface area and some secondary shelves of the coarse aggregate of some secondary shelves, Obtain the fixed specific surface area coefficient of the coarse aggregate of some secondary shelves；

The fixed specific surface area coefficient of the coarse aggregate of some secondary shelves is the table of the coarse aggregate of some secondary shelves The ratio of area and the quality of the coarse aggregate of some secondary shelves.

Preferably, the ultra-fine specific surface area coefficient for gathering materials is obtained according to the method for comprising the following steps：

A, to it is described it is ultra-fine gather materials sieve, obtain that one-level is ultra-fine to gather materials gather materials and the one-level super ultra-fine with two grades Point meter of fine aggregate tails over ratio and two grades of ultra-fine point meters for gathering materials tail over ratio；

B, using Blain specific surface method it is ultra-fine to the one-level gather materials and it is described two grades it is ultra-fine gather materials survey respectively Examination, obtains ultra-fine specific surface coefficient and the two grades of ultra-fine specific surface area coefficients that gather materials of gathering materials of one-level；

The one-level is ultra-fine to gather materials for particle diameter gathers materials more than 0.075mm and less than 0.15mm grades；

Described two grades ultra-fine to gather materials for particle diameter no more than 0.075mm grades and gathers materials.

Preferably, the ultra-fine point meter for gathering materials of the one-level tails over ratio and gathers materials by corresponding particle diameter chi for the one-level is ultra-fine The quality of the oversize of very little sieve aperture accounts for the percentage that the pitch mixes gross mass of gathering materials；

Point meter that described two grades ultra-fine to gather materials tails over ratio for described two grades ultra-fine are gathered materials by corresponding grain size sieve aperture The quality of oversize account for pitch mixing and gather materials the percentage of gross mass.

Preferably, the middle-grade specific surface area coefficient for gathering materials is to the middle-grade specific surface for gathering materials using modification coefficient Long-pending coefficient fixed value is modified and obtains；

The method of the amendment is by the coefficient fixed value of the middle-grade specific surface area gathered materials and the correction factor phase Multiply.

Preferably, to be the ultra-fine specific surface area coefficient for gathering materials of the one-level ultra-fine with one-level gathers materials and compare table for the correction factor The ratio of the fixed value of area coefficient.

Preferably, the fixed value of the specific surface area coefficient is the specific surface area coefficient in U.S.'s Y-factor method Y rule.

The invention provides a kind of method for obtaining asphalt membrane thickness, determine first the pitch bitumen content gathered materials of mixing and Relative density, then sieve pitch mixing and gather materials, and according to the grain size for gathering materials, obtains that some shelves gather materials and corresponding shelves gather materials Meter is divided to tail over ratio.Point meter that the specific surface area coefficient and corresponding shelves that some shelves that will then obtain gather materials gather materials tails over ratio phase Summation is added after multiplying, pitch is obtained and is mixed specific surface area of gathering materials；Some shelves gather materials gather materials including thick shelves, ultra-fine shelves gather materials and It is middle-grade to gather materials；The particle diameter that the thick shelves gather materials is not less than 2.36mm；The particle diameter that the ultra-fine shelves gather materials is less than 0.15mm；In described The particle diameter that shelves gather materials is not less than 0.15mm and less than 2.36mm；The pitch is mixed into specific surface area of gathering materials, pitch respectively to mix Pitch relative density substitutes into formula shown in Formulas I under the conditions of the bitumen content gathered materials and 25 DEG C, obtains asphalt membrane thickness.The present invention is carried In the method for confession will be considered in gathering materials in different-grain diameter size range, during powder particle size analyzed, find Fine aggregate ratio below 0.030mm particle diameters has been accounted between 15.47%~47.68%, and the specific surface area of this partial particulate exists Whole central shared ratio of gathering materials is very big, but specific surface computational methods have ignored particle diameter below 0.030mm's in specification , for the influence of specific surface area of entirely gathering materials, the specific surface area of gathering materials for causing method for normalizing to obtain is less than normal, enters for fine aggregate specific surface And the measurement accuracy of asphalt membrane thickness is have impact on, the method that the present invention is provided avoids mixing and gathers materials specific surface area method for normalizing In, set up and gathering materials on the hypotheses that minimum grain size is 0.030mm, the ignored problem of the fine aggregate of reduced size；Specification Method only considers that pitch mixing aggregate grading contrasts the influence of surface area, ignores the influence of mixing aggregate material in itself, reduces The accuracy of result, miberal powder of the method that the present invention is provided by particle diameter less than 0.075mm is counted, and is improved and is calculated accuracy；This The method for providing is provided, not by building stones carry out it is spherical it is assumed that with Practical Project in, institute using building stones is generally irregular multiaspect Body, the feature with very big corner angle is consistent, it is to avoid error caused by spherical hypothesis.

The method of the determination asphalt filmthickness degree that the present invention is provided, directly with asphalt content divided by the specific surface area gathered materials, will Gathered materials absorption pitch as structure pitch, it is contemplated that influence of the structure pitch to asphalt membrane thickness, it is to avoid use tradition side Pitch effective bitumen is only considered in method, the problem of influence of the structure pitch to asphalt membrane thickness is not considered.The present invention is provided Specific surface area computational methods of gathering materials to obtain mixing the specific surface area accuracy gathered materials high, with actual measurement specific surface area compatibility of gathering materials Height, asphalt membrane thickness is more accurate.

The result of embodiments of the invention shows that the pitch provided using the present invention mixes the determination method of the film thickness that gathers materials The optimum oil-stone ratio that the asphalt membrane thickness for obtaining is calculated mixes the error of the actual optimum oil-stone ratio for gathering materials with corresponding pitch Between 0.02%~0.11%, it was demonstrated that the asphalt membrane thickness that the present invention is provided determines the reliability of method.Therefore, the present invention is provided Method to obtain asphalt membrane thickness accuracy high, actual measurement specific surface area compatibility is high with gathering materials.

Further, the shared ratio in mixing is gathered materials of coarse aggregate specific surface area is small, using fixed specific surface area coefficient Meter, the convenient and swift corresponding size that obtains gathers materials specific surface area, does not influence to mix the accuracy of specific surface area of gathering materials；By system of the U.S. The introducing of number rule, is modified to original fixed specific surface area coefficient, eliminates the influence that density of gathering materials contrasts surface area, The accuracy that pitch mixes specific surface area of gathering materials is improved, so that it is guaranteed that asphalt membrane thickness has the phase higher with actual test result Fu Xing.

Brief description of the drawings

The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.

Fig. 1 is that the pitch specific surface area that the embodiment of the present invention is obtained is bent with the optimum oil-stone ratio relation that Marshall method is determined Line.

Specific embodiment

DA described in formula I is asphalt membrane thickness；

The SA is the specific surface area that pitch mixing is gathered materials；

The P_bFor the bitumen content that pitch mixing is gathered materials；

The γ_bFor the relative density that pitch mixing is gathered materials；

The present invention is carried out under the conditions of the bitumen content that pitch mixing gathers materials and 25 DEG C before the measure of pitch relative density It is preferred that determining the bitumen aggregate ratio that the pitch mixing is gathered materials；In the present invention, the bitumen aggregate ratio is preferably the pitch mixing and gathers materials Oil mix the mass ratio of the building stones for gathering materials with pitch.

After obtaining the bitumen aggregate ratio, the bitumen aggregate ratio is substituted into formula shown in formula II, obtain bitumen content.

P described in formula II_aPreferably bitumen aggregate ratio, more preferably optimum oil-stone ratio.

In the present invention, pitch relative density under the conditions of described 25 DEG C, preferably according to phase specified in pitch conventional parameter To densitometer.

Present invention screening pitch mixing is gathered materials, and according to the grain size for gathering materials, obtains some shelves and gather materials to gather materials with corresponding shelves A point meter tail over ratio.In the present invention, point meter that some shelves gather materials tails over ratio for different shelves gather materials by corresponding grain The quality of the oversize of footpath size perforations accounts for the percentage that the pitch mixes gross mass of gathering materials.

The present invention does not have particular/special requirement to screening mode, using screening mode well-known to those skilled in the art, Pitch mixing is gathered materials with the screen cloth of different pore size is screened.The present invention is preferably according to required different-grain diameter size files Determine mesh size, obtain that thick shelves gather materials, ultra-fine shelves gather materials and gather materials with middle-grade, the particle diameter that the thick shelves gather materials is not less than 2.36mm, the particle diameter that the ultra-fine shelves gather materials is less than 0.15mm, and the middle-grade particle diameter for gathering materials is not less than 0.15mm and is less than 2.36mm。

Obtain after some shelves gather materials, some shelves gather materials and weighed respectively described in preferred pair of the present invention, before the screening The pitch gross mass gathered materials of mixing for obtaining is made to compare, and obtains point meter that corresponding shelves gather materials and tails over ratio.

After a point meter tails over ratio described in obtaining, specific surface area coefficient and corresponding shelves collection that the present invention gathers materials some shelves Point meter expected is tailed over after ratio is multiplied and is added summation, is obtained pitch and is mixed specific surface area of gathering materials.

In the present invention, the specific surface area coefficient that some shelves gather materials preferably is obtained in different ways.

In the present invention, the specific surface area coefficient that the thick shelves gather materials is preferably fixed specific surface area coefficient.The fixation Specific surface area coefficient is preferably obtained according to X-ray-CT technologies.

Obtain after the thick shelves gather materials, the thick shelves of preferred pair of the present invention gather materials and sieved, and according to the grain size for gathering materials, obtain To some secondary shelves of the coarse aggregate.In the present invention, some secondary shelves are preferably 2~10 grades, more preferably 4~ 8 grades, most preferably 6 grades.The present invention does not have particular/special requirement to the particle size range of some secondary shelves, and the thick shelves are gathered materials Some shelves are sieved into, for the purpose of being easy to follow-up surface sweeping to be carried out with image procossing.In embodiments of the present invention, the screening is preferably pressed According to《Highway engineering is gathered materials testing regulations》(JTGE42-2005) requirement in T0302-2005 standards, the thick shelves are gathered materials into Row screening, obtains 6 grades of coarse aggregates of some secondary shelves, specially：It is not less than 2.36mm and less than the 4.75mm rough set of level shelves Expect, be not less than 4.75mm and the coarse aggregate less than 9.5mm level shelves, be not less than 9.5mm and less than the 13.2mm rough set of level grade Expect, be not less than 13.2mm and the coarse aggregate less than 16mm level shelves, be not less than 16mm and the coarse aggregate less than 19mm level grade and It is not less than 19mm and less than the 26.5mm coarse aggregate of level shelves.

After obtaining some secondary shelves of the coarse aggregate, the coarse aggregate of some secondary shelves enters respectively described in preferred pair of the present invention Row is weighed, and obtains the quality of the coarse aggregate of some secondary shelves.The present invention is preferably according to the coarse aggregate of some secondary shelves Point meter of the quality coarse aggregate that obtains some secondary shelves tail over ratio.In the present invention, some secondary shelves is thick Point meter for gathering materials tails over ratio and is preferably the quality gathered materials of some secondary shelves and mixes with the pitch obtained in aforementioned schemes The ratio of gross mass of gathering materials.

The coarse aggregate of some secondary shelves is scanned respectively described in preferred pair of the present invention, obtains the thick of some secondary shelves The scanning figure gathered materials.Before carrying out the scanning, the present invention preferably takes out some respectively from the coarse aggregate of some secondary shelves Block building stones as some secondary shelves gather materials respective secondary shelves scanned samples, in the present invention, described some pieces are excellent Elect 3~6 pieces as.After obtaining the scanned samples gathered materials of some secondary shelves, some secondary shelves described in preferred pair of the present invention The scanned samples of coarse aggregate are weighed respectively, obtain the quality of the scanned samples.

Scanned samples described in preferred pair of the present invention are scanned early-stage preparations respectively, obtain sample to be scanned.The present invention is right The early-stage preparations do not have particular/special requirement, are carried out using early-stage preparations mode well-known to those skilled in the art.It is of the invention real Apply example, it is preferred to use the mode of tinfoil parcel is wrapped up every block of building stones in the scanned samples, obtains sample to be scanned, There is no particular/special requirement to the parcel mode, to ensure different building stones between do not contact and be defined.

After obtaining sample to be scanned, the sample to be scanned is scanned present invention preferably employs CT scanner is swept Tracing.The present invention does not have particular/special requirement to the CT scanner, using CT instrument well-known to those skilled in the art.This hair Bright embodiment, it is preferred to use the CT scanner of model YXLON.CT.The present invention does not have particular/special requirement to the scan mode, Using scan mode well-known to those skilled in the art, the scanning rotated in translation is specially in the embodiment of the present invention Mode, image array is 128 × 128 matrix, and the sampling time of scanning is 0.3s.

After obtaining scanning figure, the scanning figure of coarse aggregate of the present invention preferably according to some secondary shelves, if obtaining described The surface area of the coarse aggregate of dry secondary shelves.The scanning figure is pre-processed present invention preferably employs image processing software, institute State pretreatment to preferably include to reduce gray value, be defined so that building stones image can be told.The present invention is to image processing software without spy It is different to require, using image processing software well-known to those skilled in the art, in the embodiment of the present invention, the software for calculation Preferably Image image processing softwares.

After scanning figure is pre-processed, the computing function present invention preferably employs described image treatment software is to the scanning Figure is analyzed, and obtains the surface area of the scanned samples.The present invention does not have particular/special requirement to the analysis method, by using The computing function of image processing software well-known to those skilled in the art is realized.

After obtaining the surface area of the scanned samples, the present invention is preferably by the scanning sample of the coarse aggregate of some secondary shelves This surface area is made to compare respectively with the quality of the scanned samples, obtains the scanned samples of the coarse aggregate of some secondary shelves Specific surface area coefficient.The present invention is preferably using the specific surface area coefficient of the scanned samples of the coarse aggregate of some secondary shelves as institute State the specific surface area coefficient of the coarse aggregate of some secondary shelves.

In the present invention, the specific surface coefficient that the ultra-fine shelves gather materials preferably is obtained using Blain specific surface method.

Ultra-fine shelves gather materials and are sieved described in preferred pair of the present invention, obtain that one-level is ultra-fine to gather materials gather materials ultra-fine with two grades. In the present invention, the one-level is ultra-fine to gather materials for particle diameter gathers materials more than 0.075mm and less than 0.15mm grades, and described two grades ultra-fine to gather materials Gather materials for particle diameter is not more than 0.075mm grades.

After obtaining the one-level ultra-fine gather materials ultra-fine with two grades of gathering materials, one-level described in preferred pair of the present invention is ultra-fine to gather materials and two Level it is ultra-fine gather materials weighed respectively, obtain the ultra-fine quality gathered materials of the one-level and two grades of ultra-fine quality gathered materials.This Invention the ultra-fine quality gathered materials of the one-level is preferably mixed the gross mass gathered materials with the pitch obtained in aforementioned schemes and makees to compare, and is obtained Ratio is tailed over to the ultra-fine point meter for gathering materials of the one-level.The present invention is preferably by the ultra-fine quality and aforementioned schemes gathered materials of the one-level In the pitch gross mass gathered materials of mixing that obtains make to compare, obtain the described two grades ultra-fine point meters for gathering materials and tail over ratio.

After completing to weigh, gather materials and described two grades present invention preferably employs Blain specific surface method is ultra-fine to the one-level It is ultra-fine gather materials tested, obtain ultra-fine specific surface area coefficient and the two grades of ultra-fine specific surface area coefficients that gather materials of gathering materials of one-level.

Heretofore described Blain specific surface method preferably comprises sample preparation, density measurement, volume calibration, test portion layer system Standby, survey defining K value, measure liquid level landing time and data integration process.

The present invention preferably according to《Highway engineering is gathered materials testing regulations》(JTGE42-2005) wanting in T0302-2005 standards Ask it is ultra-fine to the one-level gather materials it is ultra-fine with described two grades gather materials carry out sample preparation respectively, obtain sample to be tested.It is heretofore described The mode of sample preparation is cooled down after being specially drying of gathering materials ultra-fine with described two grades of gathering materials ultra-fine to the one-level, after the cooling Gathering materials carries out disperseing to obtain sample to be tested.The present invention does not have particular/special requirement to the drying, cooling and scattered mode, using this Mode known to art personnel.In the present invention, the temperature of the drying is preferably 105~115 DEG C, after drying The moisture gathered materials is preferably measurement, and the drying that the measurement is well known to those skilled in the art is gathered materials to quality and no longer become Change.In the present invention, the cooling is carried out preferably in drier, and the temperature after the cooling is preferably room temperature.In the present invention In, the dispersion preferably using by the way of vibration to the cooling after gather materials and disperse, it is described to vibrate preferably in airtight bottle In carry out, the duration of oscillation is preferably 2~4min.After the completion of vibration, the dispersion preferably also includes stirring, of the invention real In applying example, specially described stirring is declined in the powder on surface with the oscillatory process, is distributed in sample and is defined.

After obtaining sample to be tested, sample to be tested described in preferred pair of the present invention carries out density measurement, and the present invention is to the density The mode of test does not have particular/special requirement, using density measurement mode well-known to those skilled in the art.Of the invention real Apply in example, the density measurement is preferably tested using Archimedes' principle, specially：The sample to be tested is weighed, is obtained The quality of the sample to be tested；Anhydrous kerosene is filled in Li Shi bottles, by the sample to be tested be put into it is described Li Shi bottles in, measurement The volume of the anhydrous kerosene for overflowing, as the volume of the sample to be tested；By the quality of the sample to be tested and described to be tested The volume of sample is made to compare, and obtains the density of sample to be tested.

After obtaining the density of sample to be tested, sample to be tested carries out volume calibration described in preferred pair of the present invention.The present invention is to institute Stating volume calibration mode does not have particular/special requirement, using volume calibration mode well-known to those skilled in the art.In this hair In bright embodiment, according to《Highway engineering cement and cement concrete testing regulations》(JTGE42-2005) T0504-2005 regulations Volume calibration method demarcated, the volume calibration preferably use the mercury method of substitution, specially：(1) by two panels filter paper along circle Barrel is put into ventilative cylinder, it is preferred to use be put into the filter paper in ventilative cylinder by rod long, further preferably by the filter paper It is smooth to be placed on the metal emptying aperture plate of the ventilative cylinder, the diameter of the rod long is smaller by 1 than the diameter of the ventilative cylinder~ 2mm；(2) after the filter paper being put into ventilative cylinder, preferably to filling mercury, the addition of the mercury in the ventilative cylinder Preferably fill up the ventilative cylinder；(3) after filling mercury, in order that the mercury surface is put down with the nozzle of the ventilative cylinder Together, the surface of the mercury is pressed present invention preferably employs thin glass plate, the dynamics of the pressing is preferably with described thin There is no bubble or cavity to exist between glass plate and the mercury surface to be defined；(4) after the completion of pressing, the present invention preferably will be described Thin glass plate pours out the mercury after removing, and the mercury poured out is weighed, and obtains the quality of the mercury；(5) weight Multiple step (2)~(4), number of repetition is preferably 2~10 times, small with the quality difference value of the front and rear mercury for obtaining twice It is defined in 0.1g；(6) 1 filter paper is taken out, to being put into testing sample described in 3~4g in the ventilative cylinder；(7) will be described to be measured After sample is put into the ventilative cylinder, preferably by filling mercury in the ventilative cylinder, the addition of the mercury is preferably to be filled out Full of the ventilative cylinder；(8) bubble removing is gone using the step (3) and the step (4)；(9) repeating said steps (7) and The step (8), number of repetition is preferably 2~10 times, and 50mg is less than with the quality difference value of the front and rear mercury for obtaining twice It is defined, completes the volume calibration to the sample to be tested.

Test portion layer volume V is according to formula V=10-6 × (P in cylinder₁-P₂)/ρ_MercuryCalculate, be accurate to 5 × 10^-9m³；

Wherein, V---- test portions layer volume (m³)；

P₁--- during without test portion, mercury quality (g) full of cylinder；

P₂--- after-dress test portion, the cement quality (g) full of cylinder；

ρ_Mercury--- -- under test temperature mercury density (g/cm³)；

The standard specimen amount and measured sample size of correction test, should reach prepare test portion layer in voidage be 0.500±0.005；

The present invention preferably by calculating formula W=ρ V (1- ε), according to the volume demarcated, obtains the voidage of test portion layer；

The sample size (kg) that W----- needs in formula, is accurate to 1mg；

ρ --- -- sample densities (kg/m³)；

The test portion layer volume (m that V----- is determined by method hereinbefore³)；

ε --- the voidage of-test portion layer.

After completing volume calibration, the present invention preferably carries out the preparation of test portion layer, preparation side of the present invention to test portion layer Formula does not have particular/special requirement, using the preparation method of test portion well-known to those skilled in the art layer.In the embodiment of the present invention In, the preparation method of the test portion layer is specially：Perforated plate is put into the bead of ventilative cylinder, using tamper by a piece of filter paper It is put on the perforated plate, edge is laid flat and compresses；By sample to be tested, the ventilative cylinder is poured into；In order to ensure test portion layer table Face it is flat, after sample to be tested pours into the ventilative cylinder, vibrate the ventilative cylinder；Second filter paper is put into using tamper After the ventilative cylinder, using the test portion to be measured smash in the device tamping ventilative cylinder so that smash the support ring and cylinder top of device Side contacts；After completing tamping, to be smash described in rotation and smash device described in taken out after device l~2 are enclosed.

After completing the preparation of test portion layer, the present invention preferably carries out the measure of instrument K values.The present invention does not have to the measure of K values Particular/special requirement, using K values mensuration mode well-known to those skilled in the art.In an embodiment of the present invention, the K values Measure preferably carry out the survey of K values according to the instrument explanation of Blain specific surface tester (Blaine specific-surface area detection instruments) It is fixed, specially：The voidage input Blaine specific surface areas of the density of standard flour, the specific surface area of standard flour and standard flour are surveyed In examination instrument, instrument record K values are opened.

After completing the measure of K values, the present invention preferably determines liquid level in the pressure gauge of the Blaine specific-surface area detection instruments Landing time.The present invention does not have particular/special requirement to the mensuration mode of the liquid level landing time, using those skilled in the art institute The mensuration mode of well known liquid level landing time.In embodiments of the present invention, the mensuration mode of the liquid level landing time Specially：The lower conical surface that will be equipped with the ventilative cylinder of test portion layer smears piston grease, and the thickness of the smearing is preferably 1~2mm； The ventilative cylinder for being coated with piston grease is inserted into pressure gauge top taper ground, in order to ensure the ventilative cylinder and institute State pressure gauge and closely connect airtight, preferably enclose the ventilative cylinder rotation 1~2；Using minisize electromagnetic pump from the pressure Count and extract air out in an arm so that the liquid level of original liquid is risen under the expansion section of the pressure gauge in the pressure gauge End；The pressure gauge is stood, is started at first groove of the pressure gauge when the concave surface of liquid in the pressure gauge drops to Timing, timing is stopped when the concave surface of liquid drops to Article 2 groove, obtains the liquid level landing time.

During the liquid level landing time is determined, in the present invention, temperature is preferably controlled in the liquid level descent Steady temperature, the present invention preferably determines the stationary temperature in the liquid level descent.

After completing the measure of liquid level landing time, the present invention preferably carries out Data Integration, obtains that the one-level is ultra-fine to gather materials Specific surface area coefficient and two grades of ultra-fine specific surface area coefficients that gather materials.The present invention preferably according to《Highway engineering cement and coagulating cement Native testing regulations》Specific surface area coefficient formulas in (JTG E30-2005) are integrated to data, the computing formula Specially：

The temperature difference is not more than under the conditions of ± 3 DEG C during experiment, is calculated by following equation：

When the temperature difference is tested more than ± 3 DEG C, calculated by following equation：

In formula：

S_cSpecific surface area (the kg/m of --- --- tested sample³)

S_SSpecific surface area (the kg/m of --- --- standard specimen³)

When T --- --- tested sample is tested, the time (S) that liquid level landing is measured in pressure gauge

T_SWhen --- --- tested sample is tested, the time (S) that liquid level landing is measured in pressure gauge

The voidage of ε --- --- tested samples test portion layer

ε_SVoidage in --- --- standard specimen test portion layer

Density (the kg/m of ρ --- --- tested sample³)

In the present invention, the middle-grade specific surface area coefficient for gathering materials preferably middle-grade is gathered materials using correction factor to described The fixed value of the coefficient of specific surface area is modified and obtains, and the method for the amendment is preferably the middle-grade specific surface for gathering materials Long-pending coefficient fixed value is multiplied with the correction factor, and the coefficient fixed value of the middle-grade specific surface area gathered materials is U.S.'s coefficient Specific surface area coefficient in method rule, the modification coefficient is preferably the ultra-fine ratio table for gathering materials of the one-level that aforementioned schemes are obtained The ratio of the fixed value of area coefficient and the ultra-fine specific surface area coefficient for gathering materials of one-level, in the present invention, the ultra-fine collection of one-level The fixed value of the specific surface area coefficient of material is the specific surface area coefficient in U.S.'s Y-factor method Y rule.

The present invention preferably sieve it is described it is middle-grade gather materials, according to the grain size for gathering materials, obtain the middle-grade some secondary gathered materials The middle-grade of shelves is gathered materials.In the present invention, some secondary shelves are preferably 2~9 grades, more preferably 3~8 grades, most preferably 4 Shelves.The present invention does not have particular/special requirement to the screening mode, using screening mode well-known to those skilled in the art, this Invention preferably uses particle diameter to be sieved for the screen cloth of 0.3mm, 0.6mm, 1.18mm and 2.36mm.In embodiments of the present invention, It is described screening preferably according to《Highway engineering is gathered materials testing regulations》Requirement in T0302-2005 standards, to it is described it is middle-grade gather materials into Row screening, obtains 4 grades of some the middle-grade of secondary shelves and gathers materials, specially：It is not less than 0.15mm and less than 0.3mm level shelves, not low In 0.3mm and less than 0.6mm level shelves, it is not less than 0.6mm and less than 1.18mm level grade and is not less than 1.18mm and is less than 2.36mm level shelves.

Obtain some secondary shelves it is middle-grade gather materials after, the middle-grade of some secondary shelves described in preferred pair of the present invention is gathered materials point Do not weighed, obtained the middle-grade quality gathered materials of some secondary shelves.The present invention is preferably by some secondary shelves The quality gathered materials of shelves mixes the gross mass work for gathering materials with the pitch obtained in aforementioned schemes and compares, in obtaining some secondary shelves Point meter that shelves gather materials tails over ratio.

Point meter that the specific surface area coefficient and corresponding shelves that some shelves that the present invention will preferably be obtained gather materials gather materials tails over ratio Summation is added after multiplication, pitch is obtained and is mixed specific surface area of gathering materials.

Obtain pitch mixing to gather materials after specific surface area, the pitch is mixed gather materials specific surface area, pitch by the present invention The relative density that the bitumen content and pitch mixing that mixing is gathered materials are gathered materials substitutes into formula shown in Formulas I, obtains asphalt membrane thickness.

DA described in formula I is asphalt membrane thickness；The SA is the specific surface area that pitch mixing is gathered materials；The P_bFor pitch is mixed The bitumen content of intersection material；The γ_bFor the relative density that pitch mixing is gathered materials.

The invention provides a kind of method for obtaining asphalt membrane thickness, determine first the pitch bitumen content gathered materials of mixing and Relative density, then sieve pitch mixing and gather materials, and according to the grain size for gathering materials, obtains that some shelves gather materials and corresponding shelves gather materials Meter is divided to tail over ratio.Point meter that the specific surface area coefficient and corresponding shelves that some shelves that will then obtain gather materials gather materials tails over ratio phase Summation is added after multiplying, pitch is obtained and is mixed specific surface area of gathering materials；Some shelves gather materials gather materials including thick shelves, ultra-fine shelves gather materials and It is middle-grade to gather materials；The particle diameter that the thick shelves gather materials is not less than 2.36mm；The particle diameter that the ultra-fine shelves gather materials is less than 0.15mm；In described The particle diameter that shelves gather materials is not less than 0.15mm and less than 2.36mm；The pitch is mixed into specific surface area of gathering materials, pitch respectively to mix Pitch relative density substitutes into formula shown in Formulas I under the conditions of the bitumen content gathered materials and 25 DEG C, obtains asphalt membrane thickness.The present invention is carried In the method for confession will be considered in gathering materials in different-grain diameter size range, during powder particle size analyzed, find Fine aggregate ratio below 0.030mm particle diameters has been accounted between 15.47%~47.68%, and the specific surface area of this partial particulate exists Whole central shared ratio of gathering materials is very big, but specific surface computational methods have ignored particle diameter below 0.030mm's in specification , for the influence of specific surface area of entirely gathering materials, the specific surface area of gathering materials for causing method for normalizing to obtain is less than normal, enters for fine aggregate specific surface And the measurement accuracy of asphalt membrane thickness is have impact on, the method that the present invention is provided avoids mixing and gathers materials specific surface area method for normalizing In, set up and gathering materials on the hypotheses that minimum grain size is 0.030mm, the ignored problem of the fine aggregate of reduced size；Specification Method only considers that pitch mixing aggregate grading contrasts the influence of surface area, ignores the influence of mixing aggregate material in itself, reduces The accuracy of result, miberal powder of the method that the present invention is provided by particle diameter less than 0.075mm is counted, and is improved and is calculated accuracy；This The method for providing is provided, not by building stones carry out it is spherical it is assumed that with Practical Project in, institute using building stones is generally irregular multiaspect Body, the feature with very big corner angle is consistent, it is to avoid error caused by spherical hypothesis.The result of embodiments of the invention shows, adopts The optimal oilstone that the asphalt membrane thickness that the determination method that the pitch provided with the present invention mixes the film thickness that gathers materials is obtained is calculated Between mixing the error 0.02%~0.11% of the actual optimum oil-stone ratio for gathering materials with corresponding pitch, it was demonstrated that what the present invention was provided Asphalt membrane thickness determines the reliability of method.Therefore, it is high that the method that the present invention is provided obtains asphalt membrane thickness accuracy, and gathers materials Actual measurement specific surface area compatibility is high.

The method of the acquisition asphalt membrane thickness provided the present invention with reference to embodiment is described in detail, but not They can be interpreted as limiting the scope of the present invention.

In the embodiment of the present invention, pitch is using double dragon (S-OIL boards) A grades of No. 70 bi tumenf orr oads of South Korea；Coarse aggregate is adopted The limestone gravel produced with Qian County Xin Yuan building stones factory；Fine aggregate is using the western salty self-built stock ground life of high speed LM-1 marks asphalt blending station 0~2.36mm the Machine-made Sands and limestone mineral powder for producing.JL-2 is the 0 of the western self-built stock ground production of salty high speed LM-2 marks asphalt blending station ~2.36mm Machine-made Sands and limestone mineral powder, JL-3 be the self-built stock ground production of western salty high speed LM-3 mark asphalt blending station 0~ 2.36mm Machine-made Sands and limestone mineral powder.

Shown in the testing result chart 1 of the technical requirements of road asphalt and the bi tumenf orr oad for being used.

The requirement of the road asphalt of table 1 and the testing result of the road asphalt for being used

The present invention is used for the technical indicator that pitch mixing is gathered materials tested as shown in table 2, table 3 and table 4.Result shows, former Material all technical is satisfied by JTG F40-2004 technical requirements.

The pitch of table 2 mixes middle coarse aggregate technical indicator of gathering materials

The pitch of table 3 mixes middle coarse aggregate technical indicator of gathering materials

The pitch of table 4 mixes chats silty technical indicator of gathering materials

Embodiment 1

Prepared to gathering materials according to the pitch mixing aggregate grading shown in table 5, wherein GF is that specification level matches somebody with somebody intermediate value, and GJ is Stonestone frame level is matched somebody with somebody.

The pitch mixing aggregate grading of table 5

In strict accordance with《Highway engineering is gathered materials testing regulations》(JTGE42-2005) requirement in T0302-2005, is taken Sample, obtains pitch mixing to be measured and gathers materials, and wherein fine aggregate selects JL-1, weighs pitch mixing to be measured and gathers materials, and obtains pitch mixing The gross mass gathered materials, is gathered materials pitch mixing with the screen cloth of different pore size and screened.Particle diameter is obtained not less than 2.36mm Shelves coarse aggregate, particle diameter is ultra-fine less than 0.15mm grade to gather materials and be more than 0.15mm with particle diameter and middle-grade less than 2.36mm is gathered materials.

1st, using X-ray-CT technologies as coarse aggregate specific surface area coefficient assay method, concrete operation step is as follows：

(1) sieve

Each shelves that will be taken gather materials, and division is carried out with quartering, according to《Highway engineering is gathered materials testing regulations》(JTGE42- 2005) requirement in T0302-2005, is sieved by shelves, obtain 2.36mm~4.75mm, 4.75mm~9.5mm, 9.5mm~ 13.2mm, 13.2mm~16mm, 16mm~19mm and 19mm~26.5mm, 6 grades of coarse aggregates of different-grain diameter.

(2) weigh

The coarse aggregate of the 6 grades of particle diameters obtained to step (1) is weighed, and respectively obtains 6 grades of quality of coarse aggregate, respectively with The gross mass that pitch mixing is gathered materials is made to compare, and point meter for respectively obtaining 6 grades of coarse aggregates tails over ratio.

(3) sample is prepared

Take out 3 blocks of building stones respectively from 6 grades of different-grain diameter coarse aggregates, every block of building stones wrapped up 3 layers with paper, it is ensured that building stones with Do not contacted between building stones, be that later image treatment is prepared.

(4) scan

Each shelves building stones that will be wrapped are fitted into box, are put into model YXLON.CT scanners and are scanned, using side The scan mode of translation side rotation, image array is 128 × 128 matrix, and the sampling time of scanning is 0.3s, starts instrument and enters Row scanning, waits scanning result to be output.

(5) image procossing

With Image image processing softwares, treatment is carried out out to scanning result, remove the relatively low part of gray value, so that The scanning result gathered materials needed for obtaining, 6 grades of tables of the coarse aggregate of particle diameter are respectively obtained by computing function in image processing software Area and volume.

(6) measure of specific surface area coefficient

6 grades of surface areas of particle diameter coarse aggregate will be obtained to make to compare with quality, 6 grades of specific surface areas of particle diameter coarse aggregate are respectively obtained Coefficient.

Coarse aggregate measurement result is as shown in table 6.

The coarse aggregate CT scan test result of table 6

Aggregate size	19~26.5	16~19	13.2~16	9.5~13	4.75~9.	2.36~4.7
							Matter (amount mm (g))	692	507	333	106.6	385.6	65.3
Surface area (cm²)	1360.55	1170.97	1232.51	571.80	303.38	103.71
							Volume (cm³)	255.9	184.9	122.3	39.19	14.13	2.33
Specific surface area system	0.19	0.23	0.37	0.53	0.78	1.64
							Density (g/cm³)	2.704	2.742	2.723	2.72	2.731	2.702

2nd, ultra-fine specific surface area test of gathering materials

(a) according to《Highway engineering is gathered materials testing regulations》(JTGE42-2005) requirement in T0302-2005, by ultra-fine collection Material screen be divided into particle diameter more than 0.075mm and the one-level less than 0.15mm it is ultra-fine gather materials surpass with no more than the two of 0.075mm grades of particle diameter Fine aggregate, and quality is weighed respectively, then the ultra-fine quality gathered materials of one-level and two grades of ultra-fine quality gathered materials will be obtained, respectively with drip The gross mass that green grass or young crops mixing is gathered materials is made to compare, and respectively obtains the ultra-fine point meter for gathering materials of one-level and tails over ratio and two grades of ultra-fine point meters for gathering materials Tail over ratio.

(b) sample preparation：According to《Highway engineering is gathered materials testing regulations》(JTGE42-2005) requirement in T0302-2005, will The sample to be measured is dried at 110 DEG C, and room temperature is cooled in drier, in the airtight bottle for entering 100ml, uses force vibration 2min, shakes broken by the pockets of sample of caking, makes sample loose.After standing 2min, bottle cap is opened, be gently mixed, made in loose mistake The fine powder on surface is fallen in journey, is distributed in whole sample.

C () sample density is tested：The testing sample is weighed, the quality of the testing sample is obtained；Li Shi is bottled full After anhydrous kerosene, sample is poured into Li Shi bottles, and liquid medium is fully impregnated with sample particle, it is ensured that the constant feelings of temperature Under condition, sample density is calculated using physical principle, that is, the volume of the anhydrous kerosene of spilling is measured, as the body of the testing sample Product；The volume of the quality of the testing sample and the testing sample is made to compare, the density of testing sample is obtained.

(d) instrumental correction：Check the various pieces of Blaine specific-surface area detection instruments, it is ensured that it meets code requirement, inspection Look into the sealing of instrument.

E () demarcates test portion layer volume：Test portion layer volume is calculated using the mercury method of substitution, specially：(1) by two panels filter paper edge Cylindrical wall is put into ventilative cylinder, it is preferred to use be put into the filter paper in ventilative cylinder by rod long, further preferably by the filter Paper is smooth to be placed on the metal emptying aperture plate of the ventilative cylinder, and the diameter of the rod long is smaller by 1 than the diameter of the ventilative cylinder~ 2mm；(2) after the filter paper being put into ventilative cylinder, preferably to filling mercury, the addition of the mercury in the ventilative cylinder Preferably fill up the ventilative cylinder；(3) after filling mercury, in order that the mercury surface is put down with the nozzle of the ventilative cylinder Together, the surface of the mercury is pressed present invention preferably employs thin glass plate, the dynamics of the pressing is preferably with described thin There is no bubble or cavity to exist between glass plate and the mercury surface to be defined；(4) after the completion of pressing, the present invention preferably will be described Thin glass plate pours out the mercury after removing, and the mercury poured out is weighed, and obtains the quality of the mercury；(5) weight Multiple step (2)~(4), number of repetition is preferably 2~10 times, small with the quality difference value of the front and rear mercury for obtaining twice It is defined in 0.1g；(6) 1 filter paper is taken out, to being put into testing sample described in 3~4g in the ventilative cylinder；(7) will be described to be measured After sample is put into the ventilative cylinder, preferably by filling mercury in the ventilative cylinder, the addition of the mercury is preferably to be filled out Full of the ventilative cylinder；(8) bubble removing is gone using the step (3) and the step (4)；(9) repeating said steps (7) and The step (8), number of repetition is preferably 2~10 times, and 50mg is less than with the quality difference value of the front and rear mercury for obtaining twice It is defined, completes the volume calibration to the testing sample, and measure the voidage of test portion layer.

F () is corrected using standard sample to test apparatus, standard sample should keep identical with room temperature before.

G () prepares test portion layer：Perforated plate is put into the bead of ventilative cylinder, is put into a piece of filter paper using tamper described On perforated plate, edge is laid flat and compresses；By 2.000g~5.000g samples to be tested, the ventilative cylinder is poured into；In order to ensure examination Bed of material surface it is flat, after sample to be tested pours into the ventilative cylinder, vibrate the ventilative cylinder；Second is filtered using tamper After paper is put into the ventilative cylinder, test portion to be measured in the ventilative cylinder is consolidated using device is smash so that smash the support ring of device with Cylinder top margin is contacted；After completing tamping, to be smash described in rotation and smash device described in taken out after device l~2 are enclosed.

H () surveys defining K value：Illustrated according to instrument requirements, by the input of the density of standard flour, specific surface area and determined voidage To in instrument, open Instrument measuring and record K values.

I () determines the liquid level landing time：Temperature control is steady temperature, and temperature of the measurement in liquid level descent.Will dress The lower conical surface for having the ventilative cylinder of test portion layer smears piston grease, and the thickness of the smearing is preferably 1~2mm；By the smearing There is the ventilative cylinder insertion pressure gauge top taper ground of piston grease, in order to ensure the ventilative cylinder and the pressure gauge are tight Close connection is airtight, preferably encloses the ventilative cylinder rotation 1~2；Taken out from the arm of the pressure gauge one using minisize electromagnetic pump Go out air so that liquid level rises to the expansion section lower end of the pressure gauge in the pressure gauge；The pressure gauge is stood, when described The concave surface of liquid to drop to and start timing at first groove of the pressure gauge in pressure gauge, when the concave surface of liquid drops to Stop timing during two grooves, obtain the liquid level landing time.

J () is not more than what is carried out under the conditions of ± 3 DEG C in the experiment temperature difference, therefore the specific surface area of sample is calculated according to formula：

In formula：

S_cSpecific surface area (the kg/m of --- --- tested sample³)

S_SSpecific surface area (the kg/m of --- --- standard specimen³)

The voidage of ε --- --- tested samples test portion layer

ε_SVoidage in --- --- standard specimen test portion layer

Density (the kg/m of ρ --- --- tested sample³)。

The middle-grade test result gathered materials is as shown in JL-1 in table 7.

The middle-grade Blaine specific-surface area detection instrument test results of gathering materials of table 7

3rd, the middle-grade specific surface area coefficient that gathers materials

According to《Highway engineering is gathered materials testing regulations》(JTGE42-2005) requirement in T0302-2005 standards, to described It is middle-grade gather materials sieved, obtain 4 grades of the middle-grade of particle size range and gather materials.Respectively to 4 grades of particle size ranges it is middle-grade gather materials enter respectively Row is weighed, and respectively obtains the middle-grade quality gathered materials of 4 grades of particle size ranges.Mix the gross mass gathered materials with pitch again to make to compare, point 4 grades of point meters for gathering materials are not obtained tails over ratio.

The fixed value of the specific surface area coefficient that resulting 4 grades gather materials is using corresponding specific surface area in U.S.'s coefficient rule Coefficient value.As shown in table 8.

0.075mm~0.15mm grades of specific surface area of gathering materials is obtained in step 2 for 50.6m²/ kg, in U.S.'s coefficient rule 0.075mm~0.15mm grades of specific surface area of gathering materials is for 57.35m²/ kg, with 0.882 (50.6/57.35) for correction factor, centering The fixed value of specific surface area coefficient that shelves gather materials is modified, will the setting of 4 grades of specific surface area coefficients for gathering materials multiply respectively With correction factor, 1.18mm~2.36mm, 0.6mm~1.18mm, 0.3mm~0.6mm specific surface corresponding with 0.15mm~0.3mm Product coefficient is respectively 2.53m²/kg、5.42m²/kg、10.84m²/ kg and 21.68m²/kg。

Specific surface area coefficient in the middle-grade U.S.'s coefficient rule of gathering materials of table 8

The specific surface area coefficient for gathering materials of the different-grain diameter size files that will be obtained and corresponding grain size shelves gather materials point Meter tails over ratio and is multiplied and sues for peace, and obtains pitch and mixes specific surface area of gathering materials.Wherein GF grades with coarse aggregate shelves specific area measuring Result is as shown in table 9.GF grades is gathered materials as shown in table 10 with the middle-grade specific area measuring result gathered materials with ultra-fine.Obtained with this The specific surface area of GF graded aggregate mixtures is 11.85m²/kg；.

The GF grades of optimum oil-stone ratio gathered materials with pitch mixing determined according to marshall' mechanic characteristic value is 4.0, GJ grades with drip The optimum oil-stone ratio that green grass or young crops mixing is gathered materials is 3.9.

Table 9GF grades is matched somebody with somebody coarse aggregate specific area measuring result

Table 10GF grades is matched somebody with somebody fine aggregate specific area measuring result

The specific surface area gathered materials of gained is substituted into formula, (I)：

The asphalt membrane thickness for obtaining is 3.15, as shown in table 13.

Embodiment 2

Asphalt membrane thickness is measured according to the scheme described in embodiment 1, the difference with embodiment 1 is what is determined Object is that the GJ stonestone frames level prepared to gathering materials according to the pitch mixing aggregate grading shown in table 5 is matched somebody with somebody.GJ grades is matched somebody with somebody rough set As shown in table 11, GJ grades is gathered materials and the middle-grade specific area measuring result gathered materials such as table 12 material specific area measuring result with ultra-fine It is shown, each shelves specific surface area of gathering materials is added, GJ grade is obtained with specific surface area for 11.68m2/kg.Also with shown in formula I It is 3.12 that formula obtains asphalt membrane thickness, as shown in table 13.

Table 11GJ grades calculates with coarse aggregate specific surface area

Table 12GJ grades calculates with fine aggregate specific surface area

Embodiment 3

Asphalt membrane thickness is measured according to the scheme described in embodiment 1, the difference with embodiment 1 is what is determined Object is that JP-1 grades prepared to gathering materials according to the pitch mixing aggregate grading shown in table 5 is matched somebody with somebody, and obtains JP-1 grades of proportioning table Area is 11.47m²/ kg, with Marshall compaction method determine the JP-1 grades of AC-20 asphalt optimum oil-stone ratio matched somebody with somebody be 3.8%.It is 3.09 to obtain asphalt membrane thickness also with the formula shown in formula I, as shown in table 13.

Embodiment 4

Asphalt membrane thickness is measured according to the scheme described in embodiment 1, the difference with embodiment 1 is what is determined Object is that JP-2 grades prepared to gathering materials according to the pitch mixing aggregate grading shown in table 5 is matched somebody with somebody, and obtains JP-2 grades of proportioning table Area is 12.27m²/ kg, with Marshall compaction method determine the JP-2 grades of AC-20 asphalt optimum oil-stone ratio matched somebody with somebody be 4.1%.

Embodiment 5

Asphalt membrane thickness is measured according to the scheme described in embodiment 1, the difference with embodiment 1 is what is determined Object is that JP-3 grades prepared to gathering materials according to the pitch mixing aggregate grading shown in table 5 is matched somebody with somebody, and obtains JP-3 grades of proportioning table Area is 10.78m²/ kg, with Marshall compaction method determine the JP-3 grades of AC-20 asphalt optimum oil-stone ratio matched somebody with somebody be 3.6%.

The asphalt membrane thickness of the different gradation of table 13

In order to verify the reliability of new computational methods result of calculation, using optimum film thickness (3.25 μm), 5 kinds are calculated respectively Level is shown in Table 14 with corresponding optimum oil-stone ratio respectively, result of calculation, according to《Standard specification for construction and acceptance of highway asphalt pavement》 (JTGF40-2004) requirement, is dripped using the AC-20 of Marshall compaction method determination, tri- kinds of different gradations of JP-1, JP-2, JP-3 Blue or green compound optimum oil-stone ratio, as a result respectively 3.8%, 4.0%, 3.6%.Determined with result of calculation and Xie Er methods for designing Optimum oil-stone ratio is contrasted.

The corresponding bitumen aggregate ratio of the different gradation compound of table 14

As shown in Table 14：By pitch relative density at the optimal asphalt membrane thickness for determining, specific surface area of gathering materials, 25 DEG C, knot The method of the determination asphalt filmthickness degree that the conjunction present invention is provided is counter to be calculated, obtains bitumen content and bitumen aggregate ratio, inverse drip such as in table 14 Shown in blue or green content and inverse bitumen aggregate ratio data.The bitumen aggregate ratio and actual asphalt content that will be obtained by optimal asphalt membrane thickness inverse Make comparisons.

The asphalt membrane thickness for obtaining is calculated bitumen aggregate ratio, for same material, different gradation, actual bitumen aggregate ratio and calculating Gained oilstone ratio error is between 0%~1%, this demonstrate that the reliability of the method for the determination asphalt filmthickness degree that the present invention is provided Property.

Embodiment 6

Pitch mixing is gathered materials according to the scheme described in embodiment 1 carry out the measure of specific surface area, the difference with embodiment 1 It is that pitch mixing is gathered materials during selection, and fine aggregate is JL-2.The pitch for finally giving mixes the specific surface area gathered materials 11.24, the optimum oil-stone ratio that the pitch mixing determined according to marshall' mechanic characteristic value is gathered materials is 3.9.

Embodiment 7

Pitch mixing is gathered materials according to the scheme described in embodiment 1 carry out the measure of specific surface area, the difference with embodiment 1 It is that pitch mixing is gathered materials during selection, and fine aggregate is JL-3.The pitch for finally giving mixes the specific surface area gathered materials 12.8, the optimum oil-stone ratio that the pitch mixing determined according to marshall' mechanic characteristic value is gathered materials is 4.2.

Embodiment 8

Pitch mixing is gathered materials according to the scheme described in embodiment 1 carry out the measure of specific surface area, the difference with embodiment 1 It is that pitch mixing is gathered materials during selection, and fine aggregate is JL-2.The pitch for finally giving mixes the specific surface area gathered materials 12.27, the optimum oil-stone ratio that the pitch mixing determined according to marshall' mechanic characteristic value is gathered materials is 4.1.

Specific surface area and the relation of optimum oil-stone ratio that the pitch mixing measured in embodiment 1,6,7 and 8 is gathered materials, such as accompanying drawing Shown in the optimum oil-stone ratio relation curve that 1 pitch specific surface area is determined with Marshall method.Fig. 1 shows, according to the present invention program The pitch specific consistent variation tendency of the mixing specific surface area gathered materials and the optimum oil-stone ratio that Marshall method is determined for obtaining, collection Material specific surface area is good with optimum oil-stone ratio correlation.

Comparative example 1

Pitch mixing is prepared with GF to gather materials, determine what pitch mixing was gathered materials according to the method in specification according to the level in table 15 Specific surface area is 5.02, and the optimum oil-stone ratio that the pitch mixing determined according to marshall' mechanic characteristic value is gathered materials is 4.0.

Comparative example 2

Pitch mixing is prepared with GJ to gather materials, determine what pitch mixing was gathered materials according to the method in specification according to the level in table 15 Specific surface area is 5.12, and the optimum oil-stone ratio that the pitch mixing determined according to marshall' mechanic characteristic value is gathered materials is 3.9.

The comparative example asphalt mixture gradation of table 15

Gather materials specific surface area and corresponding optimum oil-stone ratio that the method for normalizing of table 16 is determined

The ratio that the specific surface area that the pitch mixing that as shown by data GF grades of table 16 is matched somebody with somebody is gathered materials is gathered materials less than GJ grades with pitch mixing Surface area；By marshall' mechanic characteristic value, show that the optimum oil-stone ratio that the GF grades of pitch mixing matched somebody with somebody is gathered materials is more than the GJ grades of drip matched somebody with somebody The optimum oil-stone ratio that green grass or young crops mixing is gathered materials.Specific surface area and optimum oil-stone ratio correlation that the pitch mixing that method for normalizing is determined is gathered materials Difference.

The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims

1. it is a kind of obtain asphalt membrane thickness method, it is characterised in that comprise the following steps：

(2) screening pitch mixing is gathered materials, and according to the grain size for gathering materials, is obtained some shelves and is gathered materials point meter sieve gathered materials with corresponding shelves Remaining ratio；

(3) point meter that the specific surface area coefficient and corresponding shelves for some shelves that the step (2) is obtained gathering materials gather materials tails over ratio Summation is added after multiplication, pitch is obtained and is mixed specific surface area of gathering materials；

(4) pitch is mixed into specific surface area of gathering materials, pitch respectively and mixes pitch under the conditions of the bitumen content gathered materials and 25 DEG C Relative density substitutes into formula shown in Formulas I, obtains asphalt membrane thickness.

D A = \frac{P_{b}}{γ_{b} \times S A} \times 10 - - - I;

DA described in formula I is asphalt membrane thickness；

The SA is the specific surface area that pitch mixing is gathered materials；

The P_bFor the bitumen content that pitch mixing is gathered materials；

The γ_bIt is pitch relative density under the conditions of 25 DEG C；Described point of meter tails over ratio for some shelves gather materials by corresponding grain The oversize of footpath size perforations accounts for the mass percent that the corresponding pitch mixing is gathered materials.

2. method according to claim 1, it is characterised in that point meter that some shelves gather materials tails over ratio for different shelves Gather materials and account for the percentage that the pitch mixes gross mass of gathering materials by the quality of the oversize of corresponding grain size sieve aperture.

3. method according to claim 1, it is characterised in that the specific surface area coefficient that the thick shelves gather materials compares table for fixation Area coefficient.

4. the determination method of specific surface according to claim 3, it is characterised in that the fixed specific surface area coefficient according to The method for comprising the following steps is obtained:

A () is gathered materials the thick shelves and is sieved, according to the grain size for gathering materials, obtain some secondary shelves of the coarse aggregate；

B () weighs respectively to the coarse aggregate of some secondary shelves, obtain the quality of the coarse aggregate of some secondary shelves；

C () is scanned respectively to the coarse aggregate of some secondary shelves, obtain the scanning of the coarse aggregate of some secondary shelves Figure；

D () obtains the surface area of the coarse aggregate of some secondary shelves according to the scanning figure of the coarse aggregate of some secondary shelves；

E () obtains according to the quality of the coarse aggregate of the surface area and some secondary shelves of the coarse aggregate of some secondary shelves The fixed specific surface area coefficient of the coarse aggregate of some secondary shelves；

The fixed specific surface area coefficient of the coarse aggregate of some secondary shelves is the surface area of the coarse aggregate of some secondary shelves With the ratio of the quality of the coarse aggregate of some secondary shelves.

5. method according to claim 1, it is characterised in that the ultra-fine specific surface area coefficient for gathering materials according to including with The method of lower step is obtained：

A, to it is described it is ultra-fine gather materials sieve, obtain that one-level is ultra-fine to gather materials gather materials and the one-level ultra-fine collection ultra-fine with two grades Point meter of material tails over ratio and two grades of ultra-fine point meters for gathering materials tail over ratio；

B, using Blain specific surface method it is ultra-fine to the one-level gather materials and it is described two grades it is ultra-fine gather materials test respectively, obtain To ultra-fine specific surface coefficient and the two grades of ultra-fine specific surface area coefficients that gather materials of gathering materials of one-level；

6. method according to claim 5, it is characterised in that it is described that the ultra-fine point meter for gathering materials of the one-level tails over ratio One-level is ultra-fine to gather materials and account for the percentage that the pitch mixes gross mass of gathering materials by the quality of the oversize of corresponding grain size sieve aperture Than；

It is the described two grades ultra-fine sieves gathered materials by corresponding grain size sieve aperture that the described two grades ultra-fine point meters for gathering materials tail over ratio The quality of upper thing accounts for the percentage that the pitch mixes gross mass of gathering materials.

7. method according to claim 5, it is characterised in that the middle-grade specific surface area coefficient for gathering materials is using modification Coefficient is modified to the coefficient fixed value of the middle-grade specific surface area gathered materials and obtains；

The method of the amendment is that the coefficient fixed value of the middle-grade specific surface area gathered materials is multiplied with the correction factor.

8. method according to claim 7, it is characterised in that the correction factor is the ultra-fine ratio table for gathering materials of the one-level The ratio of the fixed value of area coefficient and the ultra-fine specific surface area coefficient that gathers materials of one-level.

9. the method according to claim 7 or 8, it is characterised in that the fixed value of the specific surface area coefficient is system of the U.S. Specific surface area coefficient in number method rule.