CN109187533B - Method for detecting chloride ion content in sand for power transmission line engineering foundation concrete - Google Patents
Method for detecting chloride ion content in sand for power transmission line engineering foundation concrete Download PDFInfo
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- CN109187533B CN109187533B CN201811237378.8A CN201811237378A CN109187533B CN 109187533 B CN109187533 B CN 109187533B CN 201811237378 A CN201811237378 A CN 201811237378A CN 109187533 B CN109187533 B CN 109187533B
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- 239000004576 sand Substances 0.000 title claims abstract description 59
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title claims abstract description 53
- 239000004567 concrete Substances 0.000 title claims abstract description 42
- 230000005540 biological transmission Effects 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000012153 distilled water Substances 0.000 claims abstract description 31
- 229910001961 silver nitrate Inorganic materials 0.000 claims abstract description 27
- 238000003756 stirring Methods 0.000 claims abstract description 25
- QLOKJRIVRGCVIM-UHFFFAOYSA-N 1-[(4-methylsulfanylphenyl)methyl]piperazine Chemical compound C1=CC(SC)=CC=C1CN1CCNCC1 QLOKJRIVRGCVIM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002244 precipitate Substances 0.000 claims abstract description 10
- 238000005086 pumping Methods 0.000 claims abstract description 8
- -1 chlorine ions Chemical class 0.000 claims abstract description 7
- OJKANDGLELGDHV-UHFFFAOYSA-N disilver;dioxido(dioxo)chromium Chemical compound [Ag+].[Ag+].[O-][Cr]([O-])(=O)=O OJKANDGLELGDHV-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910021607 Silver chloride Inorganic materials 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims abstract description 5
- 229910052709 silver Inorganic materials 0.000 claims abstract description 4
- 239000004332 silver Substances 0.000 claims abstract description 4
- 238000002955 isolation Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 13
- 239000011449 brick Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 abstract 1
- 229910052801 chlorine Inorganic materials 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 150000001804 chlorine Chemical class 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 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
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/82—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a precipitate or turbidity
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The invention relates to a method for detecting the content of chloride ions in sand for power transmission line engineering foundation concrete, which comprises the following steps: s1, filling a sand sample with a set volume into a first transparent color cylinder; s2, pumping distilled water in the second transparent cylinder into the first transparent cylinder through a water pump, and stirring through a stirring shaft to dilute chloride ions in the sand sample; step S3, dropwise adding a set volume of potassium chromate to a third space, dropwise adding silver nitrate to the third space, reacting the silver nitrate with chloride in distilled water to generate white silver chloride precipitate, using potassium chromate as an indicator, and after all chlorine ions and silver ions in distilled water are reacted, generating brick-red silver chromate precipitate with excessive silver nitrate to complete the reaction; and S4, reading data on the first metering switch, the second metering switch and the third metering switch to obtain the content of chloride ions. The invention can obtain the chloride ion content value in the sand for concrete.
Description
Technical Field
The invention relates to the field of power transmission line engineering, in particular to a method for detecting the content of chloride ions in sand for power transmission line engineering foundation concrete.
Background
The demand of the building sand in the coastal economic developed areas of southeast China is quite large, meanwhile, with the increasing importance of society on environmental problems, the related departments of the country start to limit the sand collection activities in river channels and the like to a certain extent, the supply of the building sand tends to be tense, and a certain degree of sand barren appears in many places. At present, the purchasing of the foundation raw materials by companies is only cement steel bars, the concrete is purchased by a sand subcontractor, and the monopoly supply of the foundation raw materials is carried out by the potential force of the ubiquitous places in partial areas. In addition, the distribution of the conventional power transmission circuit engineering is small scattered points, the single-base foundation has relatively less sand consumption in the basic engineering, and the single-base foundation is transported in a scattered manner, so that the supervision difficulty on the material sources is very high. Driven by economic benefits, the "sea sand resources" unique to coastal areas are easily "sub-filled" into the power transmission foundation sub-projects.
Since both substances are important factors affecting durability of concrete and reinforced concrete in sea sand containing chloride salt and shells, sea sand which has not been strictly treated cannot be used. Because of the chlorine salt in the sea sand, the serious corrosion damage of the steel bars in the concrete can be caused, and the corrosion of the steel bars is an important factor affecting the durability of the reinforced concrete and the prestressed reinforced concrete structure. The shells in the sea sand can not only prevent the cement from being bonded with the sand, but also reduce the strength of the concrete; meanwhile, the water consumption of the concrete is increased, so that the shrinkage of the concrete is increased, and the freezing resistance and the impermeability are reduced.
At present, the construction site is used for screening the sand for the concrete only by visual observation, hand touch, mouth taste and other 'soil experience', and the content of chloride ions (Cl-) in the sand for the concrete needs to be sampled and sent to a professional laboratory for inspection, so that the conditions of long result period, high test cost and the like exist, and all transported sand for the construction cannot be monitored.
Therefore, the rapid detection of the sand for the foundation concrete is studied in depth and a solution is found, and the method has certain theoretical significance and practical significance.
According to practical engineering experience, the best method is to examine early buildings, discover problems and treat the early buildings by measuring the content of chloride ions in the raw materials doped with the chloride ions. Timely treatment can increase the reliability of the foundation construction and reduce the unstable building to a certain extent.
Disclosure of Invention
In view of the above, the invention aims to provide a method for detecting the content of chloride ions in sand for basic concrete of power transmission line engineering, which can obtain the content of chloride ions in the sand for concrete rapidly.
The invention is realized by adopting the following scheme: the method for detecting the chloride ion content in the sand for the power transmission line engineering foundation concrete comprises the steps that a detection device is needed to be provided, the detection device comprises a workbench, a color card and a transparent color cylinder are arranged on the workbench, a first isolation plate and a second isolation plate are arranged in the transparent color cylinder, and the transparent color cylinder is divided into a first space, a second space and a third space by the first isolation plate and the second isolation plate; a first transparent color cylinder, a second transparent color cylinder and a telescopic rod are arranged in the first space side by side, scale values are engraved on the walls of the first transparent color cylinder and the second transparent color cylinder, a supporting plate is arranged at the top of the telescopic rod, a driving motor is arranged on the supporting plate, a driving motor rotating shaft penetrates through the supporting plate, a stirring shaft is connected below the driving motor rotating shaft, a water suction pump is arranged in the second transparent color cylinder, the water suction pump is connected with a conveying pipe, one end of the conveying pipe is connected with the first transparent color cylinder, a first water outlet pipe is arranged on the outer side wall of the first transparent color cylinder, one end of the first water outlet pipe is connected with a first metering switch, scale values are engraved on the walls of the third transparent color cylinder and the fourth transparent color cylinder side by side, a first water inlet pipe is arranged on the side wall of the third transparent color cylinder and the fourth transparent cylinder, the other end of the first water outlet pipe penetrates through the second space, the third transparent color cylinder and the third water outlet pipe are arranged in the third space, a third metering switch and a third water outlet pipe are arranged below the third transparent color cylinder and the third water outlet pipe respectively, and a third metering switch and a third water outlet pipe are arranged in the third space and a third metering switch and a third water outlet pipe respectively;
the detection method comprises the following steps:
step S1, filling sand for power transmission line engineering foundation concrete with a set volume into a first transparent cylinder, filling distilled water into a second transparent cylinder, filling potassium chromate into a third transparent cylinder, and filling silver nitrate into a fourth transparent cylinder;
s2, pumping distilled water in a second transparent cylinder into a first transparent cylinder through a water pump, recording the volume of the pumped distilled water, stirring through a stirring shaft to dilute chloride ions in a sand sample of the sand for the power transmission line engineering foundation concrete, conveying a solution with the chloride ions into a third space through a first water outlet pipe, and obtaining the volume of the chloride ion solution through a first metering switch;
step S3, dropwise adding a set volume of potassium chromate into a third space, wherein the dropwise adding volume of the potassium chromate is obtained through a second metering switch, then dropwise adding silver nitrate into the third space, reacting the silver nitrate with chloride in distilled water to generate white silver chloride precipitate, using the potassium chromate as an indicator, and after all chloride ions and silver ions in the distilled water are reacted, generating brick-red silver chromate precipitate with the excessive silver nitrate to finish the reaction; closing the third water outlet pipe;
and S4, obtaining the volume of silver nitrate dripping through a third metering switch, and reading data on the first metering switch, the second metering switch and the third metering switch to obtain the content of chloride ions. Specifically, the algorithm for determining the chloride ion content can adopt the existing traditional calculation method, and calculate the required parameters, namely the data from the first metering switch, the second metering switch and the third metering switch.
Further, the step S2 is further specifically: and (3) stretching the telescopic rod outwards, adding sand for the power transmission line engineering foundation concrete into the first transparent color cylinder, pumping distilled water in the second transparent color cylinder into the first transparent color cylinder after adding, contracting the telescopic rod downwards, starting the driving motor to stir, and closing the driving motor after stirring.
Further, a first cover plate is arranged on the stirring shaft, and the first cover plate is close to the supporting plate.
Further, a second cover plate is arranged on the second transparent color cylinder body, and the second cover plate is in threaded connection with the second transparent color cylinder body.
Further, a drain pipe is arranged on the side wall of the bottom of the first transparent cylinder body, and a valve is arranged on the drain pipe.
Further, a fourth water outlet pipe is arranged at the bottom of the third space of the transparent color cylinder, and a valve is arranged on the fourth water outlet pipe.
Further, in step S3, the silver chromate is precipitated and then compared with the colorimetric card to determine whether the silver chromate is brick red.
Compared with the prior art, the invention has the following beneficial effects:
1. in the process of detecting the chloride ion content in the sand for the power transmission line engineering foundation concrete, the color chart is used as a reference object, so that the time for controlling the brick red precipitation to occur can be more accurately obtained, and the chloride ion content in the sand obtained through detection is more accurate.
2. The chloride ions in the sand are rapidly and fully dissolved through the stirring of the stirring shaft, and the content of the chloride ions in the sand obtained by obtaining data through a plurality of metering switches is more accurate.
Drawings
FIG. 1 is a flow chart of a method according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a first use state according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a second use state according to an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1 to 3, the present embodiment provides a method for detecting chloride ion content in sand for foundation concrete of power transmission line engineering, where the method includes providing a detection device, where the detection device includes a workbench 1, a color card 2 and a transparent color cylinder 3 are disposed on the workbench 1, a first isolation board 31 and a second isolation board 32 are disposed in the transparent color cylinder 3, and the first isolation board 31 and the second isolation board 32 divide the transparent color cylinder 3 into a first space 33, a second space 34 and a third space 35; the first space 33 is provided with a first transparent color cylinder 331, a second transparent color cylinder 332 and a telescopic rod 333 in parallel, scale values 334 are engraved on the walls of the first transparent color cylinder 331 and the second transparent color cylinder 332, a supporting plate 335 is arranged at the top of the telescopic rod 333, a driving motor 336 is arranged on the supporting plate 335, a rotating shaft of the driving motor 336 penetrates through the supporting plate 335, a stirring shaft 337 is connected below the rotating shaft of the driving motor 336, the bottom of the telescopic rod 333 is fixed on the first isolation plate 31, the telescopic rod is manually stretched or contracted, when the telescopic rod is contracted, a first cover plate on the telescopic rod just covers the first transparent color cylinder 331, when sand for power transmission line engineering foundation concrete needs to be added into the first transparent color cylinder, the telescopic rod is stretched, water in the second transparent color cylinder 332 is pumped into the first transparent color cylinder after the adding is finished, the telescopic rod is contracted, and the driving motor is started to stir; a water pump 3321 is arranged in the second transparent color cylinder 332, the water pump 3321 is connected with a conveying pipe 3322, one end of the conveying pipe 3322 is connected with the first transparent color cylinder 331, a first water outlet pipe 3311 is arranged on the outer side wall of the first transparent color cylinder 331, one end of the first water outlet pipe 3311 is connected with a first metering switch 3312, and filter cotton is arranged in one end of the first water outlet pipe 3311 and can filter water containing chloride ions, namely, sand for basic concrete of power transmission line engineering is prevented from entering the third space 35; a third transparent color cylinder 341 and a fourth transparent color cylinder 342 are arranged in the second space 34 side by side, scale values 334 are engraved on the walls of the third transparent color cylinder 341 and the fourth transparent color cylinder 342, a first water inlet pipe 3411 is arranged on the side walls of the third transparent color cylinder 341 and the fourth transparent color cylinder 342, distilled water is filled in the second transparent color cylinder, sand for filling foundation concrete of a power transmission line project is filled in the first transparent color cylinder, potassium chromate is filled in the third transparent color cylinder, and silver nitrate is filled in the fourth transparent color cylinder; the other end of the first water outlet pipe 3311 passes through the second space 34 and is located in the third space 35, a second water outlet pipe 3412 and a third water outlet pipe 3421 are respectively disposed below the third transparent color cylinder 341 and the fourth transparent color cylinder 342, the second water outlet pipe 3412 and the third water outlet pipe 3421 pass through the second isolation plate 32 and are located in the third space 35, and a second metering switch 3413 and a third metering switch 3422 are respectively disposed on the second water outlet pipe 3412 and the third water outlet pipe 3421. Wherein, this transparent look section of thick bamboo is fixed on the workstation.
The detection method comprises the following steps:
step S1, filling sand for power transmission line engineering foundation concrete with a set volume V into a first transparent cylinder, filling distilled water into a second transparent cylinder, filling potassium chromate into a third transparent cylinder, and filling silver nitrate into a fourth transparent cylinder;
s2, pumping distilled water in a second transparent cylinder into a first transparent cylinder through a water pump, recording the volume of the pumped distilled water, stirring through a stirring shaft to dilute chloride ions in a sand sample of the sand for the power transmission line engineering foundation concrete, conveying a solution with the chloride ions into a third space through a first water outlet pipe, and obtaining the volume of the chloride ion solution through a first metering switch; the step S2 is further specifically: and (3) stretching the telescopic rod outwards, adding sand for the power transmission line engineering foundation concrete into the first transparent color cylinder, pumping distilled water in the second transparent color cylinder into the first transparent color cylinder after adding, contracting the telescopic rod downwards, starting the driving motor to stir, and closing the driving motor after stirring.
Step S3, dropwise adding a set volume of potassium chromate into a third space, wherein the dropwise adding volume of the potassium chromate is obtained through a second metering switch, then dropwise adding silver nitrate into the third space, reacting the silver nitrate with chloride in distilled water to generate white silver chloride precipitate, using the potassium chromate as an indicator, and after all chloride ions and silver ions in the distilled water are reacted, generating brick-red silver chromate precipitate with the excessive silver nitrate to finish the reaction; closing the third water outlet pipe;
and S4, obtaining the volume of silver nitrate dripping through a third metering switch, and reading data on the first metering switch, the second metering switch and the third metering switch to obtain the content of chloride ions.
In the present invention, a first cover plate 338 is disposed on the stirring shaft 337, and the first cover plate 338 is adjacent to the supporting plate 335. When the distilled water and the sand for the power transmission line engineering foundation concrete are mixed and stirred, the first cover plate covers the first transparent cylinder, so that the mixed liquid of the distilled water and the sand for the power transmission line engineering foundation concrete cannot splash.
The second transparent cylinder 332 is provided with a second cover 339 in a spiral shape. Thus, the second cover 339 can prevent moisture in the outside air from flowing into the distilled water, resulting in inaccurate detection of the chloride ion content.
The bottom side wall of the first transparent cylinder 331 is provided with a drain pipe 3313, and a valve 3314 is provided on the drain pipe 3313. Thus, when the mixed solution of the distilled water and the sand for the power transmission line engineering foundation concrete is not needed, the mixed solution can be discharged through the drain pipe 3313, a fourth water outlet pipe (not shown) is arranged at the bottom of the third space 35 of the transparent color cylinder, and a valve (not shown) is arranged on the fourth water outlet pipe. After the chlorine ion content is detected, the solution can be discharged through the fourth water outlet pipe.
Wherein can set up a control box in the workstation, be provided with MCU in this control box, this MCU is 51 singlechip series, wherein is provided with shift knob (i.e. the button in the workstation the place ahead in fig. 2) outside the control box, and control operation can be carried out to driving motor, valve, suction pump, first measurement switch, second measurement switch, third measurement switch to the control box. The control manner of the control box is already prior art and will not be described in detail here.
The working principle of the invention is as follows:
filling a certain volume of sand for power transmission line engineering foundation concrete into a first transparent cylinder, filling distilled water into a second transparent cylinder, filling potassium chromate into a third transparent cylinder, filling silver nitrate into a fourth transparent cylinder, pumping distilled water in the second transparent cylinder into the first transparent cylinder through a water pump, recording the volume of the pumped distilled water, stirring through a stirring shaft and a driving motor, determining a certain volume of sand sample to be fused into a certain volume of distilled water, diluting chloride ions in the sand sample, inputting a solution with the chloride ions into a third space through a first water outlet pipe, obtaining the volume of a chloride ion solution through a scale value on the third space, dripping a certain volume of potassium chromate into the third space through a first metering switch, taking the volume of potassium chromate as an indicator, slowly dripping silver nitrate into the third space through a second metering switch, reacting the silver nitrate with chloride in the distilled water to generate white silver chloride, and taking the potassium chromate indicator as a red precipitate, and completely precipitating silver nitrate ions after the potassium chromate is used as an indicator, and the silver nitrate is completely precipitated, and the total precipitation is completely achieved after the silver nitrate ions and the silver nitrate precipitate. At the moment, the volume of silver nitrate dripping is obtained through the third metering switch, and the content of chloride ions can be calculated through reading data on the first metering switch, the second metering switch and the third metering switch through a traditional calculation formula.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. A method for detecting the content of chloride ions in sand for power transmission line engineering foundation concrete is characterized by comprising the following steps: the detection method comprises the steps that a detection device is needed to be provided, the detection device comprises a workbench, a color card and a transparent color cylinder are arranged on the workbench, a first isolation plate and a second isolation plate are arranged in the transparent color cylinder, and the first isolation plate and the second isolation plate divide the transparent color cylinder into a first space, a second space and a third space; a first transparent color cylinder, a second transparent color cylinder and a telescopic rod are arranged in the first space side by side, scale values are engraved on the walls of the first transparent color cylinder and the second transparent color cylinder, a supporting plate is arranged at the top of the telescopic rod, a driving motor is arranged on the supporting plate, a driving motor rotating shaft penetrates through the supporting plate, a stirring shaft is connected below the driving motor rotating shaft, a water suction pump is arranged in the second transparent color cylinder, the water suction pump is connected with a conveying pipe, one end of the conveying pipe is connected with the first transparent color cylinder, a first water outlet pipe is arranged on the outer side wall of the first transparent color cylinder, one end of the first water outlet pipe is connected with a first metering switch, scale values are engraved on the walls of the third transparent color cylinder and the fourth transparent color cylinder side by side, a first water inlet pipe is arranged on the side wall of the third transparent color cylinder and the fourth transparent cylinder, the other end of the first water outlet pipe penetrates through the second space, the third transparent color cylinder and the third water outlet pipe are arranged in the third space, a third metering switch and a third water outlet pipe are arranged below the third transparent color cylinder and the third water outlet pipe respectively, and a third metering switch and a third water outlet pipe are arranged in the third space and a third metering switch and a third water outlet pipe respectively;
the detection method comprises the following steps:
step S1, filling sand for power transmission line engineering foundation concrete with a set volume into a first transparent cylinder, filling distilled water into a second transparent cylinder, filling potassium chromate into a third transparent cylinder, and filling silver nitrate into a fourth transparent cylinder;
s2, pumping distilled water in a second transparent cylinder into a first transparent cylinder through a water pump, recording the volume of the pumped distilled water, stirring through a stirring shaft to dilute chloride ions in a sand sample of the sand for the power transmission line engineering foundation concrete, conveying a solution with the chloride ions into a third space through a first water outlet pipe, and obtaining the volume of the chloride ion solution through a first metering switch;
step S3, dropwise adding a set volume of potassium chromate into a third space, wherein the dropwise adding volume of the potassium chromate is obtained through a second metering switch, then dropwise adding silver nitrate into the third space, reacting the silver nitrate with chloride in distilled water to generate white silver chloride precipitate, using the potassium chromate as an indicator, and after all chloride ions and silver ions in the distilled water are reacted, generating brick-red silver chromate precipitate with the excessive silver nitrate to finish the reaction; closing the third water outlet pipe;
and S4, obtaining the volume of silver nitrate dripping through a third metering switch, and reading data on the first metering switch, the second metering switch and the third metering switch to obtain the content of chloride ions.
2. The method for detecting the chloride ion content in the sand for the power transmission line engineering foundation concrete according to claim 1, wherein the method comprises the following steps of: the step S2 is further specifically: and (3) stretching the telescopic rod outwards, adding sand for the power transmission line engineering foundation concrete into the first transparent color cylinder, pumping distilled water in the second transparent color cylinder into the first transparent color cylinder after adding, contracting the telescopic rod downwards, starting the driving motor to stir, and closing the driving motor after stirring.
3. The method for detecting the chloride ion content in the sand for the power transmission line engineering foundation concrete according to claim 1, wherein the method comprises the following steps of: the stirring shaft is provided with a first cover plate, and the first cover plate is close to the supporting plate.
4. The method for detecting the chloride ion content in the sand for the power transmission line engineering foundation concrete according to claim 1, wherein the method comprises the following steps of: the second transparent color cylinder is provided with a second cover plate, and the second cover plate is in threaded connection with the second transparent color cylinder.
5. The method for detecting the chloride ion content in the sand for the power transmission line engineering foundation concrete according to claim 1, wherein the method comprises the following steps of: the side wall of the bottom of the first transparent cylinder body is provided with a drain pipe, and a valve is arranged on the drain pipe.
6. The method for detecting the chloride ion content in the sand for the power transmission line engineering foundation concrete according to claim 1, wherein the method comprises the following steps of: the bottom of the third space of the transparent color cylinder is provided with a fourth water outlet pipe, and a valve is arranged on the fourth water outlet pipe.
7. The method for detecting the chloride ion content in the sand for the power transmission line engineering foundation concrete according to claim 1, wherein the method comprises the following steps of: in step S3, comparing whether the silver chromate is in brick red after the precipitation reaction by the colorimetric card.
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| CN201811237378.8A CN109187533B (en) | 2018-10-23 | 2018-10-23 | Method for detecting chloride ion content in sand for power transmission line engineering foundation concrete |
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| CN201811237378.8A CN109187533B (en) | 2018-10-23 | 2018-10-23 | Method for detecting chloride ion content in sand for power transmission line engineering foundation concrete |
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| CN109187533B true CN109187533B (en) | 2024-02-09 |
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