CN112697636A - Rapid and accurate determination method for mud content of sand for building - Google Patents
Rapid and accurate determination method for mud content of sand for building Download PDFInfo
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- CN112697636A CN112697636A CN202011519294.0A CN202011519294A CN112697636A CN 112697636 A CN112697636 A CN 112697636A CN 202011519294 A CN202011519294 A CN 202011519294A CN 112697636 A CN112697636 A CN 112697636A
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- sand
- weight
- mud
- mud content
- sand material
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- 239000004576 sand Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 21
- 239000004575 stone Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 12
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 238000005303 weighing Methods 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000011010 flushing procedure Methods 0.000 claims abstract description 6
- 238000007873 sieving Methods 0.000 claims abstract description 6
- 229920002472 Starch Polymers 0.000 claims abstract description 3
- 235000019698 starch Nutrition 0.000 claims abstract description 3
- 239000008107 starch Substances 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 5
- 239000004567 concrete Substances 0.000 abstract description 9
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011382 roller-compacted concrete Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a method for quickly and accurately measuring the mud content of building sand, which comprises the following steps: 1) when sampling on a sand material pile, the sampling parts should be uniformly distributed; 2) drying the sand material, and weighing to obtain the weight of the sand material, which is recorded as m 1; 3) dissolving the sand material in water, and fully dispersing agglomerated particles in the sand material; 4) selecting a 200-mesh sieve for the first-step sieving, drying the obtained components with the particle size of more than 75 mu m, and weighing the components to obtain the weight of the sand, wherein the weight is recorded as m 2; 5) and (3) flushing the rest substances by slow flow interruption, flushing the turbid solution to a clear state, collecting precipitated starch powder, drying, weighing to obtain the weight of the stone powder, wherein the weight is recorded as m3, and the calculation formula of the mud content is as follows:
. The invention only takes the mud powder with the grain diameter less than 75 mu m as the mud material to calculate the mud content, so the calculated mud content can better meet the concrete performance of the powder material with different componentsAnd (4) influence rule of energy.
Description
Technical Field
The invention relates to the technical field of material performance detection, in particular to a method for quickly and accurately measuring the mud content of building sand.
Background
At present, the method for testing the mud content mainly comprises a manual screening method: the mud content is calculated by manually putting sand into water, continuously washing and sieving, uniformly taking particles smaller than 75 mu m as mud content, drying and weighing components larger than 75 mu m as sand components. According to an operation method of GB T14685-2011 construction pebble and gravel standard, the calculated mud content of components smaller than 75 mu m as mud substances cannot completely reflect the influence rule of actual concrete performance. The components less than 75 mu m in the sand mainly comprise mud powder and stone powder, wherein the mud powder is a component for reducing the performance of the concrete, but the stone powder can improve the mortar-sand ratio of roller compacted concrete, obviously improve the grindability and interlayer bonding of the concrete, fill fine gaps among particles in the concrete, form dense stacking and improve the strength of the concrete. Therefore, the influence rule of concrete performance is hardly really reflected by the mud content calculated by uniformly using the particle components smaller than 75 μm as mud substances according to the national standard.
In terms of particle structure, stone powder is as different from mud even if the particle size is as fine as mud to less than 75 μm. The mud absorption additive and water are in a three-dimensional space structure, and the fine stone powder is solid granular sand, and the properties of the mud absorption additive and the water are completely different.
Disclosure of Invention
The invention aims to provide a method for quickly and accurately measuring the mud content of construction sand, which can separate mud powder with the particle size of less than 75 microns from stone powder, takes the stone powder content as a sand component rather than a mud-containing substance, and calculates the mud content by taking the mud powder with the particle size of less than 75 microns as the mud-containing substance.
In order to solve the above problems, the present invention adopts the following technical solutions.
A method for quickly and accurately measuring the mud content of building sand comprises the following steps:
1) when sampling on a sand material pile, the sampling parts should be uniformly distributed;
2) drying the sand material, and weighing to obtain the weight of the sand material, which is recorded as m 1;
3) dissolving the sand material in water, and fully dispersing agglomerated particles in the sand material;
4) selecting a 200-mesh sieve for the first-step sieving, drying the obtained components with the particle size of more than 75 mu m, and weighing the components to obtain the weight of the sand, wherein the weight is recorded as m 2;
5) and (3) flushing the rest substances by slow flow interruption, flushing the turbid solution to a clear state, collecting precipitated starch powder, drying, weighing to obtain the weight of the stone powder, wherein the weight is recorded as m3, and the calculation formula of the mud content is as follows:
。
as a further improvement of the invention, in step 3), the agglomerated particles in the sand are fully dispersed by stirring, vibration or ultrasonic waves.
The invention has the advantages of
Compared with the prior art, the invention has the advantages that:
the invention follows the actual situation of the rule of the influence of the mud content on the concrete performance, separates the mud powder with the particle size less than 75 microns from the stone powder, and calculates the mud content only by taking the mud powder with the particle size less than 75 microns as a mud substance, so that the calculated mud content can better accord with the rule of the influence of powder substances with different components on the concrete performance.
Drawings
Fig. 1 is a working principle diagram of the present invention.
FIG. 2 is a flow chart of the operation of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
As shown in figures 1 and 2, the invention improves on the traditional national standard method for measuring the mud content, the particle components with the particle size less than 75 microns are distinguished, the stone powder in the method is not taken as mud material to calculate the mud content, and only the mud powder dissolved in water is taken as the mud material to calculate the mud content.
The working process of the invention is as follows: (1) when sampling in the material pile, the sampling positions should be uniformly distributed. Before sampling, the surface layer of a sampling part is removed, and then 8 parts of sand with approximately equal quantity are randomly extracted from different parts to form a group of samples; (2) sampling quantity: when the mud content is measured, the minimum sampling quantity is 4.4 kg; (3) sample treatment: placing the sample on a flat plate, stirring uniformly in a wet state, stacking into round cakes with a thickness of about 20mm, dividing the round cakes into four parts with equal thickness along two mutually perpendicular diameters, taking two parts of diagonal lines, stirring uniformly again, and stacking into round cakes. The above procedure was repeated until the sample was reduced to the amount required for the test. The sample is reduced to about 500g, is dried in a drying oven at the temperature of 105 +/-5 ℃ to constant volume, and is divided into two parts which are approximately equal after being cooled to room temperature for later use. After the mud content of two samples is measured, the average value is taken as the final mud content measurement value, for the convenience of description, only one sample is measured (4) and weighed, and m1=501.4 g; (5) pouring the sample into a container, and injecting clear water to ensure that the water level is about 150mm higher than the sample level; (6) vibrating and stirring for 10min to disperse the agglomerated particles into sand, stone powder and mud powder; (7) sieving, namely sieving the sample in the container by using a 200-mesh sieve; (8) drying and weighing sand particles larger than 75% on a screen, wherein the weight m2=495.9 g; (9) washing the residual solution by slow flow until the solution is completely clarified, and filtering out the precipitated stone powder by filter paper; (10) weighing the stone powder on the filter paper, wherein the weight of the stone powder is 1.2 g; (11) according to the formula
Calculation was carried out to obtain a sludge content of 0.86%.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (2)
1. A method for quickly and accurately measuring the mud content of building sand is characterized by comprising the following steps:
1) when sampling on a sand material pile, the sampling parts should be uniformly distributed;
2) drying the sand material, and weighing to obtain the weight of the sand material, which is recorded as m 1;
3) dissolving the sand material in water, and fully dispersing agglomerated particles in the sand material;
4) selecting a 200-mesh sieve for the first-step sieving, drying the obtained components with the particle size of more than 75 mu m, and weighing the components to obtain the weight of the sand, wherein the weight is recorded as m 2;
5) and (3) flushing the rest substances by slow flow interruption, flushing the turbid solution to a clear state, collecting precipitated starch powder, drying, weighing to obtain the weight of the stone powder, wherein the weight is recorded as m3, and the calculation formula of the mud content is as follows:
。
2. the method for rapidly and accurately measuring the mud content of the building sand as claimed in claim 1, which is characterized in that:
in the step 3), fully dispersing the agglomerated particles in the sand material by adopting stirring, vibration or ultrasonic waves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011519294.0A CN112697636A (en) | 2020-12-21 | 2020-12-21 | Rapid and accurate determination method for mud content of sand for building |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011519294.0A CN112697636A (en) | 2020-12-21 | 2020-12-21 | Rapid and accurate determination method for mud content of sand for building |
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| Publication Number | Publication Date |
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| CN112697636A true CN112697636A (en) | 2021-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011519294.0A Pending CN112697636A (en) | 2020-12-21 | 2020-12-21 | Rapid and accurate determination method for mud content of sand for building |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114509367A (en) * | 2021-12-31 | 2022-05-17 | 成都宏基建材股份有限公司 | Method for rapidly detecting powder content of sand for concrete |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698241A (en) * | 2013-12-20 | 2014-04-02 | 北京东方建宇混凝土科学技术研究院有限公司 | Method for quantitatively measuring contents of mountain flour and mud in artificial sand or mixed sand |
| CN109357964A (en) * | 2018-11-09 | 2019-02-19 | 于京艾 | The detection method of clay powder content in aggregate |
-
2020
- 2020-12-21 CN CN202011519294.0A patent/CN112697636A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698241A (en) * | 2013-12-20 | 2014-04-02 | 北京东方建宇混凝土科学技术研究院有限公司 | Method for quantitatively measuring contents of mountain flour and mud in artificial sand or mixed sand |
| CN109357964A (en) * | 2018-11-09 | 2019-02-19 | 于京艾 | The detection method of clay powder content in aggregate |
Non-Patent Citations (1)
| Title |
|---|
| 戴慧珍: "《砂子含泥量的快速测定法》", 《建筑技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114509367A (en) * | 2021-12-31 | 2022-05-17 | 成都宏基建材股份有限公司 | Method for rapidly detecting powder content of sand for concrete |
| CN114509367B (en) * | 2021-12-31 | 2024-02-09 | 成都宏基建材股份有限公司 | Method for rapidly detecting powder content of sand for concrete |
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Application publication date: 20210423 |