CN108627609A - A kind of evaluation method that paver laterally isolates - Google Patents
A kind of evaluation method that paver laterally isolates Download PDFInfo
- Publication number
- CN108627609A CN108627609A CN201810467845.XA CN201810467845A CN108627609A CN 108627609 A CN108627609 A CN 108627609A CN 201810467845 A CN201810467845 A CN 201810467845A CN 108627609 A CN108627609 A CN 108627609A
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- China
- Prior art keywords
- sieve pore
- pass
- paver
- percent
- bottom plate
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/42—Road-making materials
Abstract
The present invention relates to high road pavement construction technical fields, specifically, are related to a kind of evaluation method that paver laterally isolates, the evaluation method includes the following steps：(1) embedding sampler, sampling；(2) combustion method sieve test is used to determine each shelves sieve pore percent of pass of each group sampler；(3) it is sampled in mixing building and calculates each shelves sieve pore percent of pass；(4) the key analytical sieve pore of isolation is determined according to nominal maximum aggregate size；(5) coefficient of variation of key analytical sieve pore percent of pass is calculated；(6) degree is laterally isolated according to the coefficient of variation of key analytical sieve pore percent of pass judgement paver；The key index provided by the invention for judging the coefficient of variation of key analytical sieve pore percent of pass as isolation realizes tradition and qualitatively judges to quantitatively judging, and clear concept defines, and improves the judgement efficiency of isolation, reduces test work load；It realizes the judgement laterally isolated to paver, and the judgement of other isolations of road surface can be applied to.
Description
Technical field
The present invention relates to high road pavement construction technical fields, specifically, are related to a kind of evaluation that paver laterally isolates
Method.
Background technology
Currently, the coarse aggregate that some regions easily occurs in the construction process in bituminous paving is concentrated, the thin collection in other regions
Material is concentrated, and mixture becomes uneven in appearance, as isolates.Isolation is substantially grading and asphalt content and design not phase
Symbol, causes road surface poor structure and texture features occur.Isolation is the common common quality defect of bituminous paving, the generation of isolation with
Mix, transport, construction with paving machine temperature have certain relationship, wherein isolation is most important factor caused by paver, saw
Statistics, 60% or more isolation are related with the performance of paver.
In the prior art, mainly there are ocular estimate, nucleon density method, construction depth method, coring for the evaluation method of isolation
Extraction process etc., the statement that these methods have are unclear, it is difficult to which the degree of quantitative analysis isolation, some are only limitted to commenting for apparent isolation
Valence, some road pavement globality damages are larger, are difficult to meet the condition of popularization and application.
Invention content
For the problems of the prior art, the purpose of the present invention is to provide a kind of evaluation sides that paver laterally isolates
Method realizes that paver laterally isolates the quantitative assessment of degree.
To achieve the goals above, the present invention is achieved by the following scheme：
A kind of evaluation method that paver laterally isolates, includes the following steps：
(1) 5~9 samplers are laid along the screed assembly length direction of paver, opens paver and normally paves,
It paves and takes out sampler before completion, first pressing, mark position is simultaneously encapsulated to send to laboratory and analyzed；
(2) combustion method sieve test is used, combustion method screening is carried out to one group of mixture of sampling, each shelves sieve pore is calculated and passes through
Rate；
(3) comparison grading is determined：It is sampled in mixing building discharge port, one group was taken every 1 hour, totally 3 groups, burning is sieved and counted
Each shelves sieve pore percent of pass is calculated, is averaged；
(4) different sieve pores is chosen as key analytical sieve pore according to the nominal maximum aggregate size of each mixture in step (2)：
As nominal maximum aggregate size >=26.5mm, key analytical sieve pore is 9.5mm；
When nominal maximum aggregate size >=13.2mm and less than 26.5mm when, key analytical sieve pore be 4.75mm；
As nominal maximum aggregate size ＜ 13.2mm, key analytical sieve pore is 2.36mm；
(5), for same section, to calculate and analyze same section, different measuring points key point along screed assembly length direction
The standard deviation for analysing sieve pore percent of pass is calculated according to following formula：
Mi=Ti-T0
Wherein：
Ti(%)：The percent of pass of key analytical sieve pore after the burning of same section, one group of difference measurement point is sieved；
T0(%)：The percent of pass of key analytical sieve pore after the sampling burning screening of mixing building discharge port；
N：The number of same section survey point；
Mi (%)：The percent of pass of key analytical sieve pore and mixing building discharging after the burning screening of same section difference measurement point
The difference of the percent of pass of key analytical sieve pore after mouth sampling burning screening；
S (%)：Same section, one group of different measuring points key analytical sieve pore percent of pass standard deviation；
CV(%)：Same section, one group of different measuring points key analytical sieve pore percent of pass the coefficient of variation；
(6) degree that paver laterally isolates is determined, according to same section, one group of different measuring points key sieve percent of pass
The degree that coefficient of variation judgement paver laterally isolates, chooses the average value of 3 groups of data, is carried out according to following criterion：
As Cv≤5%, judgement does not isolate；
When 5% ＜ Cv≤10%, slight isolation is judged；
As 10% ＜ Cv≤20%, judgement moderate isolation；
As Cv ＞ 20%, judgement severe isolation.
Preferably, the installation position of the sampler includes the both sides screw distribution of feed opening, side-by-side mounting point, paver
Device endpoint.
Preferably, the spacing distance of the sampler is 1.5~2.5m.
Preferably, the sampler includes bottom plate and the column cylinder being arranged on bottom plate upper face, column cylinder
Nozzle is upwards and its bottom is welded as a whole with bottom plate, and drawing hanging ring, the center line of drawing hanging ring are additionally provided on the bottom plate
It is welded on bottom plate positioned at horizontal direction and its edge, it is convenient after determining the position of sampler by the setting of drawing hanging ring
Take out sampler.
Preferably, the bottom plate is equipped with several bottom plate nail hole and is fixed on ground for screw.
Preferably, several spaced apart magnet steel are additionally provided on the bottom plate, in this way, convenient quickly determine after paving
The specific location of sampler.
Compared with prior art, the present invention has the following technical effects：
1, the embed-type sampler that the present invention uses realizes the sampling of the undisturbed after road pavement paves, it is ensured that right
The material that paves isolates the accuracy of degree measurement, after sampler is taken out, is repaired without damage to the pit-hole that sampling is left, operation side
Just, there is universal promotional value and significant economic benefit；
2, the present invention improves the judgement efficiency of isolation by the isolation key analytical sieve pore of the different nominal particle diameters of offer,
Reduce test work load；
3, provided by the invention using the coefficient of variation of key analytical sieve pore percent of pass as the key index of isolation judgement, it is real
Traditional qualitatively judge is showed and has arrived quantitative judgement, clear concept defines；
4, the present invention proposes the criterion of different sepn degree, realizes the judgement laterally isolated to paver, and can
It is applied to the judgement of other isolations of road surface.
Description of the drawings
Fig. 1 is the schematic diagram of sampler provided by the invention；
Figure label explanation：10- bottom plates, 11- bottom plate nail hole, 12- magnet steel, 20- column cylinders, 30- drawing hanging rings.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
Conjunction is specifically illustrating and specific embodiment, and the present invention is furture elucidated.
Embodiment 1
For big DT1800 pavers as experimental subjects, the screed assembly width of the paver is 11 to the present embodiment in
Rice, practical paving width are 11.5 meters, position centered on the position of discharge port, centered on discharge port, along the ironing of paver
Plate assembly length direction lays a sampler every 2.5 meters, totally 5 samplers, numbers -5.0, -2.5,0,2.5,5.0 respectively
And it is tagged on sampler to show difference.
The sampler is as shown in Figure 1, the column cylinder 20 for including bottom plate 10 and being arranged on 10 upper face of bottom plate, column
The nozzle of shape cylinder 20 is upwards and its bottom is welded as a whole with bottom plate 10, and drawing hanging ring 30 is additionally provided on the bottom plate 10,
The center line of drawing hanging ring 30 is located at horizontal direction and its edge is welded on bottom plate 10, specifically, the drawing hanging ring 30
Nut is directly used, on nut-welding to bottom plate 10, convenient for lifting out sampler after paving.
The bottom plate 10 is equipped with several bottom plate nail hole 11 and is fixed on ground for screw；
Several spaced apart magnet steel 12 are additionally provided on the bottom plate 10, the arrangement of the magnet steel 12, which can facilitate, to be taken out
Quick positioning when sampler.
Sampler is taken out after normal pave, before first pressing, laboratory is sent to and carries out burning sieve test, obtain each shelves sieve pore
Percent of pass, and be recorded in table 1.
The technological means that above-mentioned burning sieve test is well known to those skilled in the art, this will not be repeated here by the present invention.
1 each group sample combustion sieve test result of table
It is sampled in mixing building discharge port, per taking one group every other hour, takes three groups altogether, take mixture to fire with quartering after mixing
Screening is burnt, obtains comparing each shelves sieve pore percent of pass, determines comparison grading, and be recorded in table 2.
Each shelves sieve pore percent of pass of the mixture of 2 mixing building of table sampling
As seen from Table 1, the nominal maximum particle diameter of mixture is 19mm, chooses pass of the 4.75mm sieve pores as isolation analysis
Key sieve pore, is computed, and the standard deviation of key sieve percent of pass is 2.72%, the 4.75mm sieves being calculated after mixing building samples
Hole percent of pass mean value is 38.1%, and the coefficient of variation for further calculating to obtain key sieve percent of pass is 7.14%.
The coefficient of variation is 7.14%, and the lateral isolation of the paver belongs to slight isolation.
The evaluation method that paver provided by the invention laterally isolates, it is simple and convenient, to paver by the way of quantitative
Lateral isolation degree characterized, the performance of paver is fast, easily understood convenient for engineering staff.
The basic principles and main features and the features of the present invention of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement is both fallen in the range of claimed invention.The scope of protection of present invention is by appended claims
And its equivalent thereof.
Claims (6)
1. a kind of evaluation method that paver laterally isolates, it is characterised in that：Include the following steps：
(1) 5~9 samplers are laid along the screed assembly length direction of paver, opens paver and normally pave, is paving
It completes, take out sampler before first pressing, mark position and encapsulation, which are sent to laboratory, to be analyzed；
(2) combustion method sieve test is used, combustion method screening is carried out to one group of mixture of sampling, calculates each shelves sieve pore percent of pass；
(3) comparison grading is determined：It is sampled in mixing building discharge port, one group was taken every 1 hour, totally 3 groups, burning is sieved and calculated each
Shelves sieve pore percent of pass, is averaged；
(4) different sieve pores is chosen as key analytical sieve pore according to the nominal maximum aggregate size of each mixture in step (2)：
As nominal maximum aggregate size >=26.5mm, key analytical sieve pore is 9.5mm；
When nominal maximum aggregate size >=13.2mm and less than 26.5mm when, key analytical sieve pore be 4.75mm；
As nominal maximum aggregate size ＜ 13.2mm, key analytical sieve pore is 2.36mm；
(5), for same section, to calculate and analyze same section, different measuring points key analytical sieve along screed assembly length direction
The standard deviation of hole percent of pass is calculated according to following formula：
Mi=Ti-T0
Wherein：
Ti(%)：The percent of pass of key analytical sieve pore after the burning of same section, one group of difference measurement point is sieved；
T0(%)：The percent of pass of key analytical sieve pore after the sampling burning screening of mixing building discharge port；
N：The number of same section survey point；
Mi (%)：The percent of pass of key analytical sieve pore takes with mixing building discharge port after the burning screening of same section difference measurement point
The difference of the percent of pass of key analytical sieve pore after sample burning screening；
S (%)：Same section, one group of different measuring points key analytical sieve pore percent of pass standard deviation；
CV(%)：Same section, one group of different measuring points key analytical sieve pore percent of pass the coefficient of variation；
(6) degree that paver laterally isolates is determined, according to same section, the variation of one group of different measuring points key sieve percent of pass
The degree that coefficient decision paver laterally isolates chooses the average value of 3 groups of data, is carried out according to following criterion：
As Cv≤5%, judgement does not isolate；
When 5% ＜ Cv≤10%, slight isolation is judged；
As 10% ＜ Cv≤20%, judgement moderate isolation；
As Cv ＞ 20%, judgement severe isolation.
2. the evaluation method that paver according to claim 1 laterally isolates, wherein the installation position packet of the sampler
Include the both sides spiral distributor endpoint of feed opening, side-by-side mounting point, paver.
3. the evaluation method that paver according to claim 2 laterally isolates, wherein the spacing distance of the sampler is
1.5~2.5m.
4. the evaluation method that paver according to claim 1 laterally isolates, wherein the sampler include bottom plate and
The column cylinder being arranged on bottom plate upper face, the nozzle of column cylinder is upwards and its bottom is welded as a whole with bottom plate, described
Bottom plate on be additionally provided with drawing hanging ring, the center line of drawing hanging ring is located at horizontal direction and its edge is welded on bottom plate.
5. the evaluation method that paver according to claim 4 laterally isolates, wherein if the bottom plate is equipped with dry bottom
Plate nail hole is fixed to for screw on ground.
6. the evaluation method that paver according to claim 4 laterally isolates, wherein be additionally provided on the bottom plate several
Spaced apart magnet steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810467845.XA CN108627609A (en) | 2018-05-16 | 2018-05-16 | A kind of evaluation method that paver laterally isolates |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810467845.XA CN108627609A (en) | 2018-05-16 | 2018-05-16 | A kind of evaluation method that paver laterally isolates |
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| Publication Number | Publication Date |
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| CN108627609A true CN108627609A (en) | 2018-10-09 |
Family
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Citations (5)
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|---|---|---|---|---|
| CN103342483A (en) * | 2013-05-10 | 2013-10-09 | 长安大学 | Grading design method of skeleton dense structure for grading macadam base |
| CN105387939A (en) * | 2014-08-27 | 2016-03-09 | 约瑟夫福格勒公司 | System for a paver for determining a cooling behavior |
| CN105784543A (en) * | 2016-05-25 | 2016-07-20 | 王壹帆 | Waste tire rubber powder asphalt separation test and evaluation method |
| CN106018762A (en) * | 2016-05-12 | 2016-10-12 | 华南理工大学 | Gradational segregation situation considered method for detecting asphalt content through laboratory test |
| CN106290464A (en) * | 2016-08-10 | 2017-01-04 | 同济大学 | The isolation evaluation methodology of a kind of asphalt temperature based on infrared imaging |
-
2018
- 2018-05-16 CN CN201810467845.XA patent/CN108627609A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342483A (en) * | 2013-05-10 | 2013-10-09 | 长安大学 | Grading design method of skeleton dense structure for grading macadam base |
| CN105387939A (en) * | 2014-08-27 | 2016-03-09 | 约瑟夫福格勒公司 | System for a paver for determining a cooling behavior |
| CN106018762A (en) * | 2016-05-12 | 2016-10-12 | 华南理工大学 | Gradational segregation situation considered method for detecting asphalt content through laboratory test |
| CN105784543A (en) * | 2016-05-25 | 2016-07-20 | 王壹帆 | Waste tire rubber powder asphalt separation test and evaluation method |
| CN106290464A (en) * | 2016-08-10 | 2017-01-04 | 同济大学 | The isolation evaluation methodology of a kind of asphalt temperature based on infrared imaging |
Non-Patent Citations (3)
| Title |
|---|
| 中国石油化工集团公司: "《中国石化油田企业HSE培训教材 测井与射孔》", 31 May 2016 * |
| 四川省交通运输厅公路规划勘察设计研究院: "《农村公路路面典型结构设计指南》", 31 May 2017 * |
| 陈发根: "埋置式取样法用于沥青路面离析程度的评价", 《公路交通科技(应用技术版)》 * |
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Application publication date: 20181009 |