CN107132075A - A kind of quick discrimination method of marching into the arena of concrete flyash - Google Patents
A kind of quick discrimination method of marching into the arena of concrete flyash Download PDFInfo
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- CN107132075A CN107132075A CN201710297683.5A CN201710297683A CN107132075A CN 107132075 A CN107132075 A CN 107132075A CN 201710297683 A CN201710297683 A CN 201710297683A CN 107132075 A CN107132075 A CN 107132075A
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- flyash
- sample
- concrete
- arena
- marching
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/2806—Means for preparing replicas of specimens, e.g. for microscopal analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N2001/1006—Dispersed solids
Abstract
The invention discloses a kind of quick discrimination method of marching into the arena of concrete flyash, comprise the following steps：S1, flyash sample screening；S2, flyash sample microscopic observation and photo acquisition；S3 flyash sample micrograph results contrasts and analysis judge.The quick discrimination method of marching into the arena for the concrete flyash that the present invention is provided has the advantages that accuracy rate height, visual result, detection efficiency be high, easy to operate, environmental protection and energy saving, compared to the detection method of existing flyash observation mode, the microstructure of flyash after testing can be shot and recorded, and analysis contrast is carried out using standard master drawing, its testing result is more credible, can be differentiated by the distribution for recording the spherical vitreum of flyash.
Description
Technical field
The present invention relates to field of civil engineering, more particularly to a kind of concrete is quickly marched into the arena discrimination method with flyash..
Background technology
High-speed railway concrete is detected at present with flyash follows current specifications《Railway concrete engineering construction quality is checked and accepted
Standard》（TB10424-2010）In eight Testing index, respectively fineness, water demand ratio, loss on ignition, Cl-It is content, aqueous
Amount, SO3Content, CaO content and free CaO content, but this full item Testing index is only in raw feed source and same producer, same specification production
Product are used to be detected up to more than 6 months；The entry test of flyash only needs detection fineness, water demand ratio, burns and lose three indexs.
Middle discovery problems with was detected marching into the arena by current specifications：One is that detection time is long, most long up to 48 hours,
And job mix station requires that powder transport vehicle reaches discharging immediately；Two be that detection parameter is inaccurate, has lot of documents report to march into the arena
Flyash meets existing entry test code requirement, but is found to be false flyash through chemical analysis；Three be that Testing index is more, needs flower
Take a large amount of manpowers, instrument and equipment to be detected；Four be big to construction infection to testing result, has a strong impact on the duration.If according to existing
Professional etiquette model result is underproof flyash, and building site, which is typically handled, will enter tank flyash extraction storage tank, then reorganize goods
Source is marched into the arena, detected, for up to one week or so, the construction period is caused and had a strong impact on.Therefore, in flyash site acceptance mistake
Cheng Zhong, it would be highly desirable to find a kind of accurate, directly perceived, quick, easy flyash quality detection method to meet actual demands of engineering.
The content of the invention
It is an object of the invention to overcome in the presence of prior art above-mentioned not enough there is provided a kind of concrete flyash
Quick discrimination method of marching into the arena.The discrimination method compares current specifications detection side without carrying out any chemical treatment to flyash
Method, reduces efficiency, improves detection efficiency.
In order to realize foregoing invention purpose, the invention provides following technical scheme：
A kind of quick authentication method of marching into the arena of concrete flyash, comprises the following steps：
S1, flyash sample to be measured is poured into 45 μm of screen clothes, sieved；
If the total amount of residue on sieve is more than 45%, it is determined as unqualified, is withdrawn from the arena by program organization；
Further examined using step S2 if the fineness of residue on sieve is less than the scope of rank requirement；
S2, multiplication factor is placed on flyash sample to be measured for 80~150 times of micro objective, from microscope ocular
Flyash sample, adjustment focal length is to clearly sample state is observed, collection is photographed to record；
S3, the flyash sample photo amplifying observation to be measured for collecting step S2；
If vitreum quantity accounts for more than the 50-80% of observation total amount, flyash enters tank detection；
When vitreum quantity accounts for less than the 30% of observation total amount, it is unqualified flyash that can differentiate it；
If vitreum quantity accounts for the 30%-50% of observation total amount, complete detection should be carried out.
The present invention filters out the flyash for meeting fineness requirement by first carrying out screening primary election to flyash sample to be measured,
Microscopic observation and acquisition and recording of taking pictures then are carried out to flyash sample, and analysis contrast is carried out using standard master drawing, it is observed
The distribution situation of middle impurity and vitreum, so as to quickly judge whether the quality of censorship batch flyash meets standard.This hair
The concrete of bright offer is not required to carry out flyash sample to be measured any chemical treatment with the quick discriminating method of approach of flyash,
The characteristics of being in the globular glass body that size differs under the microscope according to flyash itself, by the size distribution model of flyash
Enclose, extract more than 45 μm residue on sieves and be observed, its visual result, accuracy rate are high.
Further, the above method also includes flyash sample extraction step, and the flyash sample extraction step includes：
It is sampled using 3.5m~4.5m flyash sampler from more than 15 different parts on flyash transport vehicle.
In the such scheme of the application, the flyash that diverse location is waited including powder underbody portion can be extracted,
Ensure the comprehensive of sample.
Further, in above-mentioned steps S1, screen cloth is placed on negative pressure screen analyzer sieve seat and sieved.
Further, in above-mentioned steps S1 negative pressure screen analyzer run time be 3min, range of negative pressure be 4000pa~
6000pa。
Further, above-mentioned steps S1 and step S2 are using three Duplicate Samples experiments.
In the such scheme of the application, it is ensured that experiment has more authenticity and representativeness, prevents the generation of accidental error.
Further, the above method also includes different manufacturers flyash micrograph establishment of standard.
In the such scheme of the application, because the raw material of different manufacturers are different, therefore flyash microstructure also
Difference, flyash micrograph establishment of standard is in flyash sample warp《Railway concrete engineering construction quality acceptance criteria》
（TB10424-2010）What eight Testing index were set up on the basis of meeting, the form of flyash under the microscope is size
The ball vitreum differed, it is substantially spherical in shape；By local microscopic observation, it is internal with the yellowish-brown colored foreign of only a few, impurity
In irregular angular granule, the flyash sample for meeting eight Testing index requirements is acquired note to its microstructure
Record, its standard micrograph is set up for producer's flyash, and the flyash marched into the arena later is passed through and micrograph standard comparing
Quick result.
Further, microscope is hand-held double tube microscope in above-mentioned steps S2.
Further, used in above-mentioned steps S2 and microscope observation is carried out after light source light filling.
Compared with prior art, beneficial effects of the present invention：
1st, the concrete that provides of the present invention with the quick discriminating method of approach of flyash without being appointed to flyash sample to be measured
What is chemically treated, after only flyash need to be sieved, using microscope it was observed that the form of flyash, and direct using digital device
The microcosmic morphological image of flyash is gathered, can distinguish that flyash is good and bad immediately using visual method, with advantage easy to operate.
2nd, the quick discriminating method of approach of concrete flyash that the present invention is provided according to flyash from microscope
The characteristics of being in the globular glass body that size differs down, by the particle size distribution of flyash, extract more than 45 μm residue on sieves
It is observed, its visual result, accuracy rate are high.
3rd, the quick discriminating method of approach for the concrete flyash that the present invention is provided compares existing flyash observation mode
Detection method, the microstructure of flyash after testing can be shot and recorded, and be analyzed using standard master drawing
Contrast, its testing result is more credible, can be differentiated by the distribution for recording the spherical vitreum of flyash.
Brief description of the drawings
Fig. 1 is the qualified flyash standard micrograph of certain factory and its partial enlarged drawing.
Fig. 2 is the unqualified flyash standard micrograph of certain factory and its partial enlarged drawing.
Fig. 3, which is that the qualified flyash of certain factory is actual, checks and accepts micrograph and its partial enlarged drawing.
Fig. 4 is the unqualified flyash micrograph of certain factory and its partial enlarged drawing.
Fig. 5 is the micrograph and its partial enlarged drawing of certain qualified flyash.
Fig. 6 is the micrograph and its partial enlarged drawing of certain unqualified flyash.
Fig. 7 is the micrograph and its partial enlarged drawing of certain unqualified flyash.
Embodiment
With reference to test example and embodiment, the present invention is described in further detail.But this should not be understood
Following embodiment is only limitted to for the scope of above-mentioned theme of the invention, it is all that this is belonged to based on the technology that present invention is realized
The scope of invention.
Embodiment 1
Concrete is quickly marched into the arena discriminating with flyash
S1, flyash sample are extracted
According to《Sampling method of cement》（GB12573-2008）Disclosed sampling method, from 16 differences on ash transfer car
Position is sampled.It should be noted that following 2 points in sampling process：One is that flyash sampler special need to reach 3.5m, Neng Gouti
Take powder underbody portion flyash；Two is representative when being sampling, the every batch of flyash must per car must examine, it is to avoid there is centre
The flyash appearance of different cars and different quality.
S2, sample screening and screening result judge
1. sample is sieved
Scene is extracted to the sample returned to be sufficiently mixed uniformly by 0.9mm square hole screen, it is standby to 1kg with quartering division；
Precise flyash sample about 10g, is accurate to 0.01g, pours into 45 μm of square hole screens, and sieve is placed in into negative pressure screen analyzer sieve seat
On, close the lid, the setting time is 3min, adjustment negative pressure is 4000pa~6000pa；Constantly struck in screening process with rubber bar
Lid is beaten, prevents from adhering to flyash on lid；Screen analysis finishes rear precise residue on sieve and pours into clean by residue on sieve and dry
Plastic pallet in it is standby.
2. screening result judges
Residue on sieve after screening is more than the 45% of flyash sample total amount, the batch flyash is judged to be unqualified, by program organization
Withdraw from the arena.
Embodiment 2
Concrete is quickly marched into the arena discriminating with flyash
S1, flyash sample are extracted
According to《Sampling method of cement》（GB12573-2008）Disclosed sampling method, from 20 differences on ash transfer car
Position is sampled.It should be noted that following 2 points in sampling process：One is that flyash sampler special need to reach 4.5m, Neng Gouti
Take powder underbody portion flyash；Two is representative when being sampling, the every batch of flyash must per car must examine, it is to avoid there is centre
The flyash appearance of different cars and different quality.
S2, sample screening and screening result judge
1. sample is sieved
Scene is extracted to the sample returned to be sufficiently mixed uniformly by 0.9mm square hole screen, it is standby to 1kg with quartering division；
Precise flyash sample about 10g, is accurate to 0.01g, pours into 45 μm of square hole screens, and sieve is placed in into negative pressure screen analyzer sieve seat
On, close the lid, the setting time is 3min, adjustment negative pressure is 4000pa~6000pa；Constantly struck in screening process with rubber bar
Lid is beaten, prevents from adhering to flyash on lid；Screen analysis finishes rear precise residue on sieve and pours into clean by residue on sieve and dry
Plastic pallet in it is standby.
2. screening result judges
Residue on sieve after screening is less than the 45% of flyash sample total amount, therefore, it is determined that it meets fineness requirement, is entered using step S2
One step is examined.
S3, observation prepare
1. environmental requirement
5~40 DEG C of environment temperature, humidity≤50% during experiment；Avoid many dirt, direct sunlight, vibrations, wet environment；Need heavily fortified point
Gu, planar table or workbench.
2. observation prepares
On operating desk tile dried and clean unfolded printing paper one, by the flyash after screening weigh about 1.5g pour into beat
Printing paper Zhang Zhongxin, it is evenly laid out in being made thinner on paper, without accumulation with small scraper.
S4, sample observation, photo acquisition
1. microscope work main points
Camera lens must be protected, photoscope is contacted without hand or hard thing, wiping camera lens must be wiped with lens wiping paper.Should not be excessive
Regulation focusing gear；Avoid beating shock；Should not sun direct projection；Should not arbitrarily it dismantle, it is to avoid scratch eyeglass；For a long time without using
When, battery is taken out.
2. observing samples, extract photo
100 times of hand-held double tube microscope object lens are gently placed on flyash, LED/light source is opened, eyepiece is observed, adjustment focal length is clear
It is clear to observe sample state, then will be capable of taking pictures and as number for 8,000,000 smart mobile phone is adjusted to the state of taking pictures, by mobile phone object lens
（Camera）It is close to magnifying glass eyepiece, clearly observes that sample state can be gathered and photograph to record.
S5, results contrast, analysis judge
1. interpretation of result
Smart mobile phone is collected into flyash photo to be transferred on computer in time, by comparative analysis, in flyash micrograph,
Random to intercept figure using square, interception figure is chosen in micrograph partial enlarged drawing, it is observed that wherein vitreum quantity
More than the 70% of observation total amount is accounted for, another 2 parallel sample situations are identical, then the batch flyash can enter tank detection.
The foundation of certain producer's flyash standard micrograph
The raw material of different manufacturers are different, therefore the microstructure of flyash is also different, and the foundation of standard microgram is in fine coal
Grey sample warp《Railway concrete engineering construction quality acceptance criteria》（TB10424-2010）The basis that eight Testing index meet
On set up, satisfactory flyash sample is acquired note by the same steps of embodiment 2 to its microstructure
Record, sets up its standard micrograph for producer's flyash, the flyash marched into the arena later is compared its micrograph and can differentiated
As a result.The form of flyash under the microscope is ball vitreum not of uniform size, substantially spherical in shape；By local micro- sight
Survey, it is internal with the yellowish-brown colored foreign of only a few, impurity is in irregular angular granule, such as Fig. 1 is the qualified fine coal of the producer
Grey standard micrograph and partial enlarged drawing.And the form of fine-ground fly-ash under the microscope only has few ball vitreum, through office
Amplification observation its internal impurity in portion's is generally irregular angular granule, then flyash is unqualified, is the factory as shown in Figure 2
The standard micrograph and partial enlarged drawing of the unqualified flyash of family.
Embodiment 3 is with producer's different batches fine coal ash analysis decision method
To set up the quasi- micrograph of flyash standard same producer's different batches flyash sample by embodiment 2 the step of carry out
Quick entry test, its actual micrograph are as shown in figure 3, its fineness is 10.6% after testing, and through being compared with Fig. 1, its form is basic
Flyash standard micrograph requirement is met, differentiation can enter tank, through further detection, its loss on ignition is 4.8%, remaining seven detection refers to
Mark is satisfied by《Railway concrete engineering construction quality acceptance criteria》（TB10424-2010）Current specifications requirement.Fig. 4 is the factory
The micrograph of unqualified flyash, its fineness is 11.2%, and through being compared with Fig. 2, flyash micrograph is hardly visible any spherical
Vitreum, flyash is made up of impurity such as black carbon slag, stone flour, clinkers, and vitreum is can't see completely, therefore differentiation is moved back by program
, but after testing, its loss on ignition is 7.3%, needs water ratio to be 103%, meets current specifications entry test requirement.Even press existing rule
The index of model entry test differentiates that this flyash is qualified；If differentiating by this method, this flyash be it is underproof, can be with
Directly it is determined as false flyash.
Embodiment 4
Flyash described in Application Example 2 discrimination method of marching into the arena carries out the collection of micrograph to the flyash of different batches and remembered
Record, respectively as illustrated in figs. 5-7, accordingly quickly judges it for acceptance or rejection flyash according to result.
Claims (8)
1. the quick authentication method of marching into the arena of a kind of concrete flyash, it is characterised in that comprise the following steps：
S1, flyash sample to be measured is poured into 45 μm of screen clothes, sieved；
If the total amount of residue on sieve is more than 45%, it is determined as unqualified, is withdrawn from the arena by program organization；
Further examined using step S2 if the fineness of residue on sieve is less than the scope of rank requirement；
S2, multiplication factor is placed on flyash sample to be measured for 80~150 times of micro objective, from microscope ocular
Flyash sample, adjustment focal length is to clearly sample state is observed, collection is photographed to record；
S3, the flyash sample photo amplifying observation to be measured for collecting step S2；
If vitreum quantity accounts for more than the 50-80% of observation total amount, flyash enters tank detection；
When vitreum quantity accounts for less than the 30% of observation total amount, it is unqualified flyash that can differentiate it；
If vitreum quantity accounts for the 30%-50% of observation total amount, complete detection should be carried out.
2. the quick discrimination method of marching into the arena of concrete flyash according to claim 1, it is characterised in that methods described
Also include flyash sample extraction step, the flyash sample extraction step includes：Taken using 3.5m~4.5m flyash
Sample device is sampled from more than 15 different parts on flyash transport vehicle.
3. the quick discrimination method of marching into the arena of concrete flyash according to claim 1, it is characterised in that the step
In S1, screen cloth is placed on negative pressure screen analyzer sieve seat and sieved.
4. the quick discrimination method of marching into the arena of concrete flyash according to claim 3, it is characterised in that the step
The run time of negative pressure screen analyzer is 3min in S1, and range of negative pressure is 4000pa~6000pa.
5. the method for quick identification of concrete flyash according to claim 1, it is characterised in that the step S1 and
Step S2 is using three Duplicate Samples experiments.
6. the method for quick identification of concrete flyash according to claim 1, it is characterised in that methods described is also wrapped
Include different manufacturers flyash micrograph establishment of standard.
7. the method for quick identification of concrete flyash according to claim 1, it is characterised in that the microscope is
Hand-held double tube microscope.
8. the method for quick identification of concrete flyash according to claim 1, it is characterised in that use light source light filling
Microscope observation is carried out afterwards.
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| CN201710297683.5A CN107132075A (en) | 2017-04-28 | 2017-04-28 | A kind of quick discrimination method of marching into the arena of concrete flyash |
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| CN201710297683.5A CN107132075A (en) | 2017-04-28 | 2017-04-28 | A kind of quick discrimination method of marching into the arena of concrete flyash |
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| CN103771807A (en) * | 2014-01-24 | 2014-05-07 | 东南大学 | Light aggregate cell concrete self-insulating building block and preparation method thereof |
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| CN105158121A (en) * | 2015-08-13 | 2015-12-16 | 中交第二航务工程局有限公司 | Novel detection method of pulverized fly ash |
| US9376343B2 (en) * | 2010-05-20 | 2016-06-28 | Flashfill Services, Llc | Foamed composition for pavement patching, and methods of utilizing and producing the same |
-
2017
- 2017-04-28 CN CN201710297683.5A patent/CN107132075A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798207A (en) * | 2010-04-07 | 2010-08-11 | 西南科技大学 | Ready-mixed concrete with phosphorus slag powder |
| US9376343B2 (en) * | 2010-05-20 | 2016-06-28 | Flashfill Services, Llc | Foamed composition for pavement patching, and methods of utilizing and producing the same |
| CN102520114A (en) * | 2011-12-15 | 2012-06-27 | 华南理工大学 | Rapid testing method for distinguishing quality of coal ash |
| CN103771807A (en) * | 2014-01-24 | 2014-05-07 | 东南大学 | Light aggregate cell concrete self-insulating building block and preparation method thereof |
| CN104876520A (en) * | 2015-04-21 | 2015-09-02 | 太原钢铁(集团)有限公司 | Manufacturing method for powder ash air-entrained concrete blocks |
| CN105158121A (en) * | 2015-08-13 | 2015-12-16 | 中交第二航务工程局有限公司 | Novel detection method of pulverized fly ash |
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