CN103553438A - Control method for quality of asphalt mixture - Google Patents
Control method for quality of asphalt mixture Download PDFInfo
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- CN103553438A CN103553438A CN201310469551.8A CN201310469551A CN103553438A CN 103553438 A CN103553438 A CN 103553438A CN 201310469551 A CN201310469551 A CN 201310469551A CN 103553438 A CN103553438 A CN 103553438A
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Abstract
The invention provides a control method for the quality of an asphalt mixture and relates to a quality control method for prediction, monitoring, adjusting and optimization of the quality of the asphalt mixture based on thickness parameters of an asphalt film during construction. The invention aims to overcome the problem that influence of material variability on the asphalt mixture is not properly controlled in conventional production processes for the asphalt mixture. The method provided by the invention comprises the following steps: 1, establishing a database; 2, predicting and monitoring the quality of an on-site mixture which is prepared by mixing asphalt, aggregate and ore powder; and 3, adjusting cold material proportion and hot material proportion of the on-site mixture, carrying out mixing according to an adjusted production mixture ratio and controlling gradation composition of the asphalt mixture, thereby completing quality controlling of the asphalt mixture. The method provided by the invention is applicable to the field of quality control.
Description
Technical field
The present invention relates to a kind of quality controlling means of the prediction of quality of construction process Asphalt Mixture, monitoring, adjustment and the optimization based on asphalt membrane thickness parameter.
Background technology
In the control process of Asphalt Pavement Construction Quality, there are many variability factors, in these factors, there is the fluctuation of pitch index, have variation and the fluctuation of mineral aggregate index, the variation of these indexs and fluctuation are inevitably, still, variation for index, if can not adjust targetedly in construction process well and optimize mixture construction proportioning, these fluctuating factors will directly affect the performance of asphalt, and then affect the quality of bituminous pavement and the work-ing life on road surface.For improving functional quality and the service life on road surface, must carry out mixture quality prediction, monitoring, adjustment and optimization for on-the-spot material situation.And current, in the technique means for this quality control, there is no science and perfect method.
Summary of the invention
The present invention will solve in existing Process of Pitch Mixture Production, the control method of a kind of quality of asphalt mixtures that material variability proposes without appropriate control method asphalt impact.
The control method of quality of asphalt mixtures comprises:
One, building database;
Two, field mix material quality is predicted and monitored; Wherein said field mix material be by pitch, gathering materials mixes with breeze;
Three, field mix material quality is carried out to the adjustment of cold burden and hot material ratio, according to the production mix proportion after adjusting, carry out mix, control asphalt mixture gradation and form, completed the control method of quality of asphalt mixtures.
Invention effect: the present invention proposes the method system that asphalt control of construction quality is complete.Set up quality control data storehouse, proposed sequence of control, quantized the index of quality control, illustrated the method for quality control.Solve and avoided the blindness of quality control procedure.Fundamentally, solved quality control procedure, do not have standard working routine, there is no concrete optimization index, there is no the problem of clear and definite analytical procedure.In invention, for the analysis and calculation method of quality control index-asphalt membrane thickness, fill up the blank of quality optimization index, improved the science of quality control, made more true variability's feature of approaches engineering of quality control, improved index applicability.
Accompanying drawing explanation
Fig. 1 is schema of the present invention.
Embodiment
Embodiment one: the control method of the quality of asphalt mixtures of present embodiment comprises:
One, building database;
Two, field mix material quality is predicted and monitored; Wherein said field mix material be by pitch, gathering materials mixes with breeze;
Three, field mix material quality is carried out to the adjustment of cold burden and hot material ratio, according to the production mix proportion after adjusting, carry out mix, control asphalt mixture gradation and form, completed the control method of quality of asphalt mixtures.
Present embodiment effect: present embodiment has proposed the complete method system of asphalt control of construction quality.Set up quality control data storehouse, proposed sequence of control, quantized the index of quality control, illustrated the method for quality control.Solve and avoided the blindness of quality control procedure.Fundamentally, solved quality control procedure, do not have standard working routine, there is no concrete optimization index, there is no the problem of clear and definite analytical procedure.In present embodiment, for the analysis and calculation method of quality control index-asphalt membrane thickness, filled up the blank of quality optimization index, improved the science of quality control, make more true variability's feature of approaches engineering of quality control, improved index applicability.
Embodiment two: present embodiment is different from embodiment one: described in step 1, building database concrete steps are:
(1) analyze on-the-spot starting material, carry out performance index test; Wherein, described on-the-spot starting material comprise pitch, gather materials and breeze;
(2) mineral aggregate is carried out to investigation and sampling, analyze each mineral aggregate gradation and form situation, according to the proportion of composing of Target Mixture Ratio or production mix proportion, carry out at random final gradation, obtain the gradation composition scope of asphalt, judge the fluctuation of formate gradation composition and as quality control foundation; Wherein, described mineral aggregate comprises and gathering materials and breeze;
(3) the gradation composition scope of the asphalt obtaining according to step (2), design the asphalt that 2～5 kinds of typical gradings form, carry out the test of the asphalt consumption performance of different gradation composition, draw the performance of asphalt mixture that different pitches consumption and different gradation form;
(4) the Performance Test on Asphalt Mixture result forming according to the different pitches consumption in the performance index test-results in step (1) and step (3), different gradation, and the test-results of Target Mixture Ratio and production mix proportion, calculate asphalt membrane thickness, set up material index, film thickness, grating and mixture performance database.Other step and parameter are identical with embodiment one.
Embodiment three: present embodiment is different from embodiment one or two: described in step (1), performance index are:
(a) density and penetration degree, softening temperature, ductility, viscosity and the solubleness conventional index of test pitch;
(b) scene gathers materials and the density of breeze and sieve the screening group obtaining according to density;
(c) the shape composition that screening group is gathered materials is analyzed in size analysis;
(d) according to screening group aggregate shape ratio, be divided into each analytical unit, numbering recording quality;
(e) superficial makings of test analysis unit and structure.Other step and parameter are identical with embodiment one or two.
Embodiment four: present embodiment is different from one of embodiment one to three: calculate asphalt membrane thickness described in step (4), set up material index, film thickness, grating and mixture performance database and be specially:
(a) density and penetration degree, softening temperature, ductility, viscosity and the solubleness conventional index of test pitch;
(b) scene gathers materials and the density of breeze and sieve the screening group obtaining according to density;
(c) analyze the shape composition that screening group is gathered materials;
(d) according to screening group aggregate shape ratio, be divided into each analytical unit, numbering recording quality;
(e) superficial makings of test analysis unit and structure;
(f) interaction of adhesivity or interaction analysis of experiments mineral aggregate and pitch;
(g) according to screening result, according to production mix proportion, carry out final gradation, analyze synthetic result, be optimized;
(h) according to the result of Gradation Optimization, analyze relevant variability metrics, adopt the ANALYSIS OF CALCULATING specific surface area of specific surface area;
(i) asphalt content and density index, the pitch volume of Units of Account quantity compound;
(j) according to specific surface area, calculate the surface-area of Board Lot compound Mineral Material.
In step in present embodiment (h), the method for calculation of specific surface area and step:
1. analyze the shape facility of mineral aggregate granulometric composition, computational analysis mineral aggregate geometric model, shape factor S(is as shown in table 1 below), determine and select which kind of geometrical analysis model, that can select has spheroid and cubes, a rectangular parallelepiped, certainly, also can adopt a plurality of analytical models, distinguish the amounts of particles (minute meter percentage of sieve residue or quality) of each model representative;
Specific surface area shape factor S under the different mineral aggregate shapes of table 1
2. test the density of each analytical unit;
3. (1) calculated specific surface area coefficient according to the following formula;
Fai=6/（ρ
iD
i） （1）
In formula:
D
ifor representing diameter;
ρ
idensity (unit, kg/m
3).
4. analyze superficial makings and structure, according to formula (2), calculate texture adjusted coefficient K
w;
k
w=1+16R
a 2/λa
2 （2）
In formula:
R
afor profile arithmetic average error;
λ
amean wavelength (distance of adjacent two crests or trough) for profilograph.
5. according to the modification method of density and geometrical shape, calculate the specific surface area coefficient of each analytical unit, according to formula (3) calculated specific surface area SA
g.
In formula:
M
ithe quality m of analysis bank mineral aggregate
i(unit, kg);
FA
ithe specific surface area coefficient FA of analysis bank mineral aggregate
i.
6. (4) calculated specific surface area according to the following formula
SA
j=K
w·SA
g （4）
Other step and parameter are identical with one of embodiment one to three.
Embodiment five: present embodiment is different from one of embodiment one to four: in step 2, field mix material quality is predicted and monitoring is specially:
(A) calculate asphalt membrane thickness; Wherein, described asphalt membrane thickness comprises average or effective bitumen film thickness;
(B) analyze gradation composition and asphalt membrane thickness; Wherein, described asphalt membrane thickness comprises average or effective bitumen film thickness;
(C) result in formate gradation composition, asphalt membrane thickness and database is contrasted to the performance of prediction asphalt;
(D) the asphalt properties of prediction and Target Mixture Ratio and < < standard specification for construction and acceptance of highway asphalt pavement > > contrast, judge whether asphalt meets performance of asphalt mixture requirement.
In present embodiment, the method for calculation of step (A) medium pitch film thickness are:
1. asphalt quality, the mineral aggregate quality in Units of Account volume (or quality) compound;
2. Units of Account volume (or quality) compound medium pitch volume;
3. corresponding mineral aggregate surface-area in Units of Account volume (or quality) compound;
4. pitch volume, divided by mineral aggregate surface-area, obtains average asphalt membrane thickness;
Or analyze pitch and mineral aggregate interaction, analytical calculation effective bitumen thickness 5..
Other step and parameter are identical with one of embodiment one to four.
Embodiment six: present embodiment is different from one of embodiment one to five: in step 3, field mix material quality is adjusted with control and is specially:
(1) when performance of asphalt mixture meets performance requriements: if carry out production mix proportion optimization, only, according to the production mix proportion of optimizing, carry out the adjustment of cold burden, hot material ratio, carry out mix according to the production mix proportion after adjusting; If without carrying out production mix proportion optimization, carry out the mix of compound according to original production proportioning; Wherein, described adjustment is according to quality control data storehouse, final gradation curve is reached or farthest approach the gradation composition curve of mixture performance excellence in database;
(2) when performance of asphalt mixture does not meet performance requriements, analyze the adjusted value of asphalt membrane thickness, inverse pitch quantity, calculates asphalt content, and according to the gradation composition of optimization or former proportioning, according to new asphalt content, readjust, according to the construction proportioning of readjusting, carry out the adjustment of cold burden, hot material ratio, and asphalt content, according to the production mix proportion after adjusting, carry out mix;
(3) utilize the construction proportioning that the database in step 1 is adjusted to carry out mixture performance or salient features test;
(4), when performance index do not meet mixture performance requirement, get back to step 2 and step 3 and restart to analyze;
(5) when performance index meet mixture performance requirement, according to the construction proportioning production mix proportion of readjusting, carry out the adjustment of cold burden, hot material ratio, according to the production mix proportion after adjusting, carry out mix.Other step and parameter are identical with one of embodiment one to five.
Embodiment seven: present embodiment is different from one of embodiment one to six: in step (three), mixture performance test comprises Marshall Test, wheel tracking test, girder pliability test, freeze thawing split test, immersion Marshall Test, fatigue experiment, creep test, dynamic elastic modulus test and four-point bending fatigue experiment.Other step and parameter are identical with one of embodiment one to six.
Claims (7)
1. a control method for quality of asphalt mixtures, is characterized in that the control method of quality of asphalt mixtures comprises:
One, building database;
Two, field mix material quality is predicted and monitored; Wherein said field mix material be by pitch, gathering materials mixes with breeze;
Three, field mix material quality is carried out to the adjustment of cold burden and hot material ratio, according to the production mix proportion after adjusting, carry out mix, control asphalt mixture gradation and form, completed the control method of quality of asphalt mixtures.
2. the control method of a kind of quality of asphalt mixtures according to claim 1, is characterized in that the concrete steps of building database described in step 1 are:
(1) analyze on-the-spot starting material, carry out performance index test; Wherein, described on-the-spot starting material comprise pitch, gather materials and breeze;
(2) mineral aggregate is carried out to investigation and sampling, analyze each mineral aggregate gradation and form situation, according to the proportion of composing of Target Mixture Ratio or production mix proportion, carry out at random final gradation, obtain the gradation composition scope of asphalt, judge the fluctuation of formate gradation composition and as quality control foundation; Wherein, described mineral aggregate comprises and gathering materials and breeze;
(3) the gradation composition scope of the asphalt obtaining according to step (2), design the asphalt that 2～5 kinds of typical gradings form, carry out the test of the asphalt consumption performance of different gradation composition, draw the performance of asphalt mixture that different pitches consumption and different gradation form;
(4) the Performance Test on Asphalt Mixture result forming according to the different pitches consumption in the performance index test-results in step (1) and step (3), different gradation, and the test-results of Target Mixture Ratio and production mix proportion, calculate asphalt membrane thickness, set up material index, film thickness, grating and mixture performance database.
3. the control method of a kind of quality of asphalt mixtures according to claim 2, is characterized in that described in step (1), performance index are:
(a) density and penetration degree, softening temperature, ductility, viscosity and the solubleness conventional index of test pitch;
(b) scene gathers materials and the density of breeze and sieve the screening group obtaining according to density;
(c) the shape composition that screening group is gathered materials is analyzed in size analysis;
(d) according to screening group aggregate shape ratio, be divided into each analytical unit, numbering recording quality;
(e) superficial makings of test analysis unit and structure.
4. the control method of a kind of quality of asphalt mixtures according to claim 3, is characterized in that calculating asphalt membrane thickness described in step (4), sets up material index, film thickness, grating and mixture performance database and is specially:
(a) density and penetration degree, softening temperature, ductility, viscosity and the solubleness conventional index of test pitch;
(b) scene gathers materials and the density of breeze and sieve the screening group obtaining according to density;
(c) analyze the shape composition that screening group is gathered materials;
(d) according to screening group aggregate shape ratio, be divided into each analytical unit, numbering recording quality;
(e) superficial makings of test analysis unit and structure;
(f) interaction of adhesivity or interaction analysis of experiments mineral aggregate and pitch;
(g) according to screening result, according to production mix proportion, carry out final gradation, analyze synthetic result, be optimized;
(h) according to the result of Gradation Optimization, analyze relevant variability metrics, adopt the ANALYSIS OF CALCULATING specific surface area of specific surface area;
(i) asphalt content and density index, the pitch volume of Units of Account quantity compound;
(j) according to specific surface area, calculate the surface-area of Board Lot compound Mineral Material.
5. the control method of a kind of quality of asphalt mixtures according to claim 4, is characterized in that in step 2, field mix material quality being predicted and monitoring is specially:
(A) calculate asphalt membrane thickness; Wherein, described asphalt membrane thickness comprises average or effective bitumen film thickness;
(B) analyze gradation composition and asphalt membrane thickness; Wherein, described asphalt membrane thickness comprises average or effective bitumen film thickness;
(C) result in formate gradation composition, asphalt membrane thickness and database is contrasted to the property of prediction asphalt
Can;
(D) the asphalt properties of prediction and Target Mixture Ratio and < < standard specification for construction and acceptance of highway asphalt pavement > > contrast, judge whether asphalt meets performance of asphalt mixture requirement.
6. the control method of a kind of quality of asphalt mixtures according to claim 5, is characterized in that in step 3, field mix material quality being adjusted with control and being specially:
(1) when performance of asphalt mixture meets performance requriements: if carry out production mix proportion optimization, only, according to the production mix proportion of optimizing, carry out the adjustment of cold burden, hot material ratio, carry out mix according to the production mix proportion after adjusting; If without carrying out production mix proportion optimization, carry out the mix of compound according to original production proportioning; Wherein, described adjustment is according to quality control data storehouse, final gradation curve is reached or farthest approach the gradation composition curve of mixture performance excellence in database;
(2) when performance of asphalt mixture does not meet performance requriements, analyze the adjusted value of asphalt membrane thickness, inverse pitch quantity, calculates asphalt content, and according to the gradation composition of optimization or former proportioning, according to new asphalt content, readjust, according to the construction proportioning of readjusting, carry out the adjustment of cold burden, hot material ratio, and asphalt content, according to the production mix proportion after adjusting, carry out mix;
(3) utilize the construction proportioning that the database in step 1 is adjusted to carry out mixture performance or salient features test;
(4), when performance index do not meet mixture performance requirement, get back to step 2 and step 3 and restart to analyze;
(5) when performance index meet mixture performance requirement, according to the construction proportioning production mix proportion of readjusting, carry out the adjustment of cold burden, hot material ratio, according to the production mix proportion after adjusting, carry out mix.
7. the control method of a kind of quality of asphalt mixtures according to claim 6, is characterized in that in step (three), mixture performance test comprises Marshall Test, wheel tracking test, girder pliability test, freeze thawing split test, immersion Marshall Test, fatigue experiment, creep test, dynamic elastic modulus test and four-point bending fatigue experiment.
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| CN103940396A (en) * | 2014-04-16 | 2014-07-23 | 哈尔滨工业大学 | Test method for determining CRTSI type CA mortar asphalt film thickness |
| CN104195921A (en) * | 2014-08-20 | 2014-12-10 | 山西路桥建设集团有限公司 | Embedded display and input method of matching curve of asphalt mixing equipment |
| CN104652230A (en) * | 2014-12-25 | 2015-05-27 | 长安大学 | Adjusting method for gradation of cold-recycling mixture before and after compacting |
| CN106116266A (en) * | 2016-06-16 | 2016-11-16 | 吉林大学 | The control method of contents of ground slag in asphalt |
| CN107587399A (en) * | 2017-08-28 | 2018-01-16 | 厦门理工学院 | A kind of grading proportioning computational methods of asphalt mineral aggregate |
| CN109447953A (en) * | 2018-10-10 | 2019-03-08 | 深圳增强现实技术有限公司 | Asphalt quality detection method, system and electronic equipment based on textural characteristics |
| CN110631961A (en) * | 2019-09-27 | 2019-12-31 | 深圳市市政工程总公司 | Method for determining optimal mixing amount of warm-mix agent of fiber warm-mix asphalt mixture |
| CN113506599A (en) * | 2021-07-19 | 2021-10-15 | 中国水利水电科学研究院 | Digital mixing and intelligent dynamic regulation and control system for cemented dam |
| CN113740193A (en) * | 2021-08-25 | 2021-12-03 | 北京路新沥青混凝土有限公司 | Asphalt concrete quality monitoring method and equipment thereof |
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| CN103940396B (en) * | 2014-04-16 | 2016-05-25 | 哈尔滨工业大学 | A kind of test method of definite CRTS I type CA mortar asphalt membrane thickness |
| CN103940396A (en) * | 2014-04-16 | 2014-07-23 | 哈尔滨工业大学 | Test method for determining CRTSI type CA mortar asphalt film thickness |
| CN104195921B (en) * | 2014-08-20 | 2017-02-15 | 山西路桥建设集团有限公司 | Embedded display and input method of matching curve of asphalt mixing equipment |
| CN104195921A (en) * | 2014-08-20 | 2014-12-10 | 山西路桥建设集团有限公司 | Embedded display and input method of matching curve of asphalt mixing equipment |
| CN104652230A (en) * | 2014-12-25 | 2015-05-27 | 长安大学 | Adjusting method for gradation of cold-recycling mixture before and after compacting |
| CN104652230B (en) * | 2014-12-25 | 2017-01-04 | 长安大学 | A kind of for cold regeneration mix hit real before and after the method for adjustment of grating |
| CN106116266A (en) * | 2016-06-16 | 2016-11-16 | 吉林大学 | The control method of contents of ground slag in asphalt |
| CN107587399A (en) * | 2017-08-28 | 2018-01-16 | 厦门理工学院 | A kind of grading proportioning computational methods of asphalt mineral aggregate |
| CN109447953A (en) * | 2018-10-10 | 2019-03-08 | 深圳增强现实技术有限公司 | Asphalt quality detection method, system and electronic equipment based on textural characteristics |
| CN110631961A (en) * | 2019-09-27 | 2019-12-31 | 深圳市市政工程总公司 | Method for determining optimal mixing amount of warm-mix agent of fiber warm-mix asphalt mixture |
| CN113506599A (en) * | 2021-07-19 | 2021-10-15 | 中国水利水电科学研究院 | Digital mixing and intelligent dynamic regulation and control system for cemented dam |
| CN113740193A (en) * | 2021-08-25 | 2021-12-03 | 北京路新沥青混凝土有限公司 | Asphalt concrete quality monitoring method and equipment thereof |
| CN113740193B (en) * | 2021-08-25 | 2022-12-20 | 北京路新沥青混凝土有限公司 | Asphalt concrete quality monitoring method and equipment thereof |
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