CN109187381A - A kind of method of quick measurement Machine-made Sand MB value - Google Patents
A kind of method of quick measurement Machine-made Sand MB value Download PDFInfo
- Publication number
- CN109187381A CN109187381A CN201810865834.7A CN201810865834A CN109187381A CN 109187381 A CN109187381 A CN 109187381A CN 201810865834 A CN201810865834 A CN 201810865834A CN 109187381 A CN109187381 A CN 109187381A
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- machine
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- made sand
- suspension
- added dropwise
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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
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0118—Apparatus with remote processing
- G01N2021/0143—Apparatus with remote processing with internal and external computer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0162—Arrangements or apparatus for facilitating the optical investigation using microprocessors for control of a sequence of operations, e.g. test, powering, switching, processing
- G01N2021/0175—Arrangements or apparatus for facilitating the optical investigation using microprocessors for control of a sequence of operations, e.g. test, powering, switching, processing for selecting operating means
Abstract
The invention discloses a kind of methods of quickly measurement Machine-made Sand MB value.Machine-made Sand to be measured is dried, the part of partial size 2.36mm or more is weeded out, the Machine-made Sand for weighing quality G, which pours into quickly to stir in the beaker for fill distilled water, forms stable suspension；Methylene blue solution is added dropwise into suspension by peristaltic pump, while being added dropwise, the ultraviolet-visible spectrophotometer by connecting computer measures the absorbance of suspension, when absorbance reaches absorbance A corresponding to light blue tinge0When stop be added dropwise methylene blue solution；The methylenum careuleum volume V being added dropwise is shown by reading peristaltic pump, is calculated by formula to obtain the MB value of fine aggregate.By the measurement of absorbance compared with the judgment criteria for occurring light blue tinge in GB/T 14584-2011, data are more scientific, accurate.By way of peristaltic pump automatic dripping, wriggling pump speed and time are controllable, and test is physically easier to perform and controllably.
Description
Technical field
The invention belongs to technical field of concrete, and in particular to a method of quickly measurement Machine-made Sand MB value.
Background technique
Since natural river sand resource is increasingly short, employment mechanism sand is natural to replace more and more for Concrete Industry at present
River sand.Mountain flour and clay powder content have opposite impacts on concrete performance in Machine-made Sand, and suitable mountain flour can be to a certain degree
The upper workability and durability for improving concrete, but mud powder is but easy to generate unfavorable shadow to the intensity and durability of concrete
It rings.National standard GB/T 14584-2011 " building sand " judges the micro mist ingredient for being less than 0.075mm in concrete Machine-made Sand at present
It is that need to be detected with methylenum careuleum (MB value) method based on mountain flour or based on mud powder.When MB value is less than 1.4, based on mountain flour,
When MB value is greater than 1.4, based on mud powder, the content of stone powder limitation of Machine-made Sand will be tightened up at this time.
The MB value test method of " building sand " (GB/T 14584-2011) standard recommendation, it is general although being widely adopted
All over the disadvantages of there is operating difficulties, time-consuming, and measurement error is big.Analyzing its reason mainly has the following:
In methylene blue solution adition process, it is common to use pipette or dropper, for operating unskilled experimenter,
It is difficult to accomplish accurately to draw 5ml solution in one minute, and completes contamination process.
The sediment of specified diameter 8-12mm in standard when around 1mm or so occur and stablizing light blue tinge, stops being added
Methylene blue solution.Personnel not abundant enough for experience, it is difficult to the depth of color is judged by naked eyes, and due to different tests
Personnel's judgment criteria is inconsistent, be easy to cause test result different.
If providing in standard, tinge disappears in 4min, adds 5ml methylene blue solution, if tinge disappears in 5min
It loses, adds 2ml methylene blue solution, until the sustainable 5min of tinge.Entire test process is complicated and takes a long time, and needs to test
Personnel concentrate one's energy to participate in the overall process.
Summary of the invention
Present invention aims in view of the deficiencies of the prior art, provide a kind of new quick measurement Machine-made Sand methylenum careuleum MB value
Method.
In order to achieve the above objectives, as follows using technical solution:
A kind of method of quick measurement Machine-made Sand MB value, comprising the following steps:
1) Machine-made Sand to be measured is dried, weeds out the part of partial size 2.36mm or more, the Machine-made Sand for weighing quality G, which pours into, to be filled
Quickly stirring forms stable suspension in the beaker of distilled water；
2) methylene blue solution is added dropwise into suspension by peristaltic pump, while being added dropwise, by the purple for connecting computer
Outside-visible spectrophotometer measurement suspension absorbance, when absorbance reaches absorbance A corresponding to light blue tinge0When
Stop that methylene blue solution is added dropwise；
3) the methylenum careuleum volume V being added dropwise is shown by reading peristaltic pump, the MB of fine aggregate is calculated as follows
Value；
Wherein, MB is methylene blue number, and unit g/kg, G are Machine-made Sand quality to be measured, and unit g, V are the methylenum careuleum of consumption
Overall solution volume, Unit/mL.
According to the above scheme, the absorbance A0Confirm in the following manner:
The dry sand 200g of known MB value is poured into the beaker for filling 500ml distilled water, stirring forms suspension, instills
The methylene blue solution of 20*MBmL, the absorbance of suspension is A at this time0。
Absorbance A at this time0In the methylene blue solution concentration reflected, as " building sand " (GB/T 14584-2011)
There is methylenum careuleum concentration corresponding to light blue tinge.
The present invention has the beneficial effect that:
Other than the drying weighing of front, methylenum careuleum is added dropwise by computer control peristaltic pump in the equal operable automatically of whole process
Solution, when ultraviolet-visible spectrophotometer detects that suspension absorbance reaches A0, computer, which controls peristaltic pump, stops that Asia is added dropwise
First indigo plant solution, while dripping quantity at this time is recorded, the MB value of Machine-made Sand to be measured can be calculated automatically according to formula, be greatly saved
Manpower and time.
By the measurement of absorbance compared with the judgment criteria for occurring light blue tinge in GB/T 14584-2011, data are more
It is scientific, accurate.
By way of peristaltic pump automatic dripping, wriggling pump speed and time are controllable, have been added dropwise from what peristaltic pump was read
Methylenum careuleum amount is more accurate compared with pipette and dropper, and test is physically easier to perform and controllably.
Specific embodiment
Following embodiment further illustrates technical solution of the present invention, but not as limiting the scope of the invention.
Embodiment 1
Demarcate the absorbance A of suspension when methylenum careuleum-Machine-made Sand occurs stablizing tinge0。
Use Lafarge Machine-made Sand for standard sample, having surveyed MB value is 1.0.Machine-made Sand 500g drying is weighed, and is sieved
Except the particle for being greater than 2.36.It takes processed Machine-made Sand 200g to pour into the beaker for filling 500ml distilled water, is stirred with impeller
Machine forms suspension with (600 ± 60) r/min stirring 5min, instills the methylene blue solution of 20MB (ml) (i.e. 20ml), measures this
When suspension absorbance A0.Absorbance A at this time0The methylene blue solution concentration reflected, as " building sand " (GB/
T14584-2011 occurs stablizing methylenum careuleum concentration corresponding to light blue tinge in).
Embodiment 2
Measure the MB value of sample Machine-made Sand.
Selection Wenchuan machine sand is sample machine sand, weighs experimental machine sand and is no less than 500g drying, weeds out and be wherein greater than
The particle of 2.36mm weighs Machine-made Sand 200g and pours into the beaker of 500ml, is stirred with turbine stirrer with (600 ± 60) r/min
It mixes 5min and forms suspension, off-test is then continued stirring until with (400 ± 40) r/min revolving speed.
By peristaltic pump to suspension be added dropwise methylene blue solution, while with connect computer spectrophotometry
The absorbance of meter record suspension.When absorbance reaches above-mentioned absorbance A0When, stop that methylene blue solution is added dropwise, at this time peristaltic pump
The methylene blue solution volume V being added dropwise1For 24ml.It is 1.2 according to the MB value that formula I calculates the sample Machine-made Sand.
Its MB value is measured by 7.5 chapters in GB/T 14584-2011 " construction sand " standard using Machine-made Sand of the same race, is surveyed three times
Determining result is respectively 1.2,1.1,1.2.Test result is consistent with test result of the invention.
Embodiment 3
Measure the MB value of sample Machine-made Sand.
Selection jade machine sand is sample machine sand, weighs experimental machine sand and is no less than 500g drying, weeds out and be wherein greater than
The particle of 2.36mm weighs Machine-made Sand 200g and pours into the beaker of 500ml, is stirred with turbine stirrer with (600 ± 60) r/min
It mixes 5min and forms suspension, off-test is then continued stirring until with (400 ± 40) r/min revolving speed.
By peristaltic pump to suspension be added dropwise methylene blue solution, while with connect computer spectrophotometry
The absorbance of meter record suspension.When absorbance reaches above-mentioned absorbance A0When, stop that methylene blue solution is added dropwise, at this time peristaltic pump
The methylene blue solution volume V1 being added dropwise is 20ml.It is 1.0 according to the MB value that formula I calculates the sample Machine-made Sand.
Its MB value is measured by 7.5 chapters in GB/T 14584-2011 " construction sand " standard using Machine-made Sand of the same race, is surveyed three times
Determining result is respectively 1.0,1.1,1.0.Test result is consistent with test result of the invention.
Embodiment 4
Selection Qing Chuan machine sand is sample machine sand, weighs experimental machine sand and is no less than 500g drying, weeds out and be wherein greater than
The particle of 2.36mm weighs Machine-made Sand 200g and pours into the beaker of 500ml, is stirred with turbine stirrer with (600 ± 60) r/min
It mixes 5min and forms suspension, off-test is then continued stirring until with (400 ± 40) r/min revolving speed.
By peristaltic pump to suspension be added dropwise methylene blue solution, while with connect computer spectrophotometry
The absorbance of meter record suspension.When absorbance reaches above-mentioned absorbance A0When, stop that methylene blue solution is added dropwise, wriggles at this time
Pumping the methylene blue solution volume V1 being added dropwise is 22ml.It is 1.1 according to the MB value that formula I calculates the sample Machine-made Sand.
Its MB value is measured by 7.5 chapters in GB/T 14584-2011 " construction sand " standard using Machine-made Sand of the same race, is surveyed three times
Determining result is respectively 1.0,1.1,1.1.Test result is consistent with test result of the invention.
Claims (2)
1. a kind of method of quickly measurement Machine-made Sand MB value, it is characterised in that the following steps are included:
1) Machine-made Sand to be measured is dried, weeds out the part of partial size 2.36mm or more, the Machine-made Sand for weighing quality G, which pours into, fills distillation
Quickly stirring forms stable suspension in the beaker of water；
2) methylene blue solution is added dropwise into suspension by peristaltic pump, while being added dropwise, by connection computer it is ultraviolet-can
The absorbance for seeing spectrophotometric determination suspension, when absorbance reaches absorbance A corresponding to light blue tinge0When stop drop
Add methylene blue solution；
3) the methylenum careuleum volume V being added dropwise is shown by reading peristaltic pump, the MB value of fine aggregate is calculated as follows；
Wherein, MB is methylene blue number, and unit g/kg, G are Machine-made Sand quality to be measured, and unit g, V are the methylene blue solutions of consumption
Total volume, Unit/mL.
2. quickly measuring the method for Machine-made Sand MB value as described in claim 1, it is characterised in that the absorbance A0In the following manner
Confirmation:
The dry sand 200g of known MB value is poured into the beaker for filling 500ml distilled water, stirring forms suspension, instills 20*MB
The methylene blue solution of mL, the absorbance of suspension is A at this time0。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810865834.7A CN109187381A (en) | 2018-08-01 | 2018-08-01 | A kind of method of quick measurement Machine-made Sand MB value |
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| CN201810865834.7A CN109187381A (en) | 2018-08-01 | 2018-08-01 | A kind of method of quick measurement Machine-made Sand MB value |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562194A (en) * | 2020-05-19 | 2020-08-21 | 中交第四航务工程局有限公司 | Quick test method for MB value of machine-made sand |
| CN111735787A (en) * | 2020-07-09 | 2020-10-02 | 兰州理工大学 | Test method for rapidly measuring mud content in machine-made sand |
| CN112461767A (en) * | 2020-11-17 | 2021-03-09 | 中建商品混凝土有限公司 | Automatic high-precision MB value rapid detection device and use method thereof |
| CN113552119A (en) * | 2021-07-20 | 2021-10-26 | 广东华路交通科技有限公司 | Fine aggregate methylene blue value testing method |
| CN113848185A (en) * | 2021-09-30 | 2021-12-28 | 中建西部建设建材科学研究院有限公司 | Sand MB value testing system and method |
| CN116559162A (en) * | 2023-07-11 | 2023-08-08 | 四川蜀道建筑科技有限公司 | Sand MB value rapid judging method based on image recognition technology |
| CN117309825A (en) * | 2023-11-30 | 2023-12-29 | 四川蜀道建筑科技有限公司 | Light-transmitting device for detecting methylene blue MB value |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562194A (en) * | 2020-05-19 | 2020-08-21 | 中交第四航务工程局有限公司 | Quick test method for MB value of machine-made sand |
| CN111562194B (en) * | 2020-05-19 | 2022-03-18 | 中交第四航务工程局有限公司 | Quick test method for MB value of machine-made sand |
| CN111735787A (en) * | 2020-07-09 | 2020-10-02 | 兰州理工大学 | Test method for rapidly measuring mud content in machine-made sand |
| CN111735787B (en) * | 2020-07-09 | 2023-06-02 | 兰州理工大学 | Test method for rapidly determining mud content in machine-made sand |
| CN112461767A (en) * | 2020-11-17 | 2021-03-09 | 中建商品混凝土有限公司 | Automatic high-precision MB value rapid detection device and use method thereof |
| CN113552119A (en) * | 2021-07-20 | 2021-10-26 | 广东华路交通科技有限公司 | Fine aggregate methylene blue value testing method |
| CN113848185A (en) * | 2021-09-30 | 2021-12-28 | 中建西部建设建材科学研究院有限公司 | Sand MB value testing system and method |
| CN113848185B (en) * | 2021-09-30 | 2024-03-01 | 中建西部建设建材科学研究院有限公司 | Sand MB value test system and method |
| CN116559162A (en) * | 2023-07-11 | 2023-08-08 | 四川蜀道建筑科技有限公司 | Sand MB value rapid judging method based on image recognition technology |
| CN116559162B (en) * | 2023-07-11 | 2023-09-08 | 四川蜀道建筑科技有限公司 | Sand MB value rapid judging method based on image recognition technology |
| CN117309825A (en) * | 2023-11-30 | 2023-12-29 | 四川蜀道建筑科技有限公司 | Light-transmitting device for detecting methylene blue MB value |
| CN117309825B (en) * | 2023-11-30 | 2024-04-09 | 四川蜀道建筑科技有限公司 | Light-transmitting device for detecting methylene blue MB value |
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