Gravity adsorption type test rod for rapidly detecting content of chloride ions in sandstone material, preparation method and application thereof

A technology of chloride ion content and sand and gravel materials, which is applied in the direction of analyzing materials through chemical reactions, material analysis and sampling devices through observation of the impact on chemical indicators, etc., can solve the problems of poor portability, time-consuming and laborious, and practical Inconvenient and other problems, to achieve the effect of low cost, good adsorption effect, fast and accurate detection

Pending Publication Date: 2020-10-16
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods have the disadvantages of poor portability, time-consuming and laborious, and inconvenient actual use.

Method used

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  • Gravity adsorption type test rod for rapidly detecting content of chloride ions in sandstone material, preparation method and application thereof
  • Gravity adsorption type test rod for rapidly detecting content of chloride ions in sandstone material, preparation method and application thereof
  • Gravity adsorption type test rod for rapidly detecting content of chloride ions in sandstone material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A new gravity adsorption test rod for rapid detection of chloride ion content in sand and gravel materials, such as figure 1 and figure 2 As shown, it includes a test rod 2 and a hard plastic case 1 with scales. The test rod 2 is wrapped inside a hard plastic casing 1 with scales, one end of the hard plastic casing 1 is closed for fixing the test rod 2, and the other end is open.

[0025] The test rod 2 is composed of the following materials by weight: cotton fiber, color-changing silica gel, silver chromate, polycarboxylate water reducer and other materials. The shape of the test rod 2 is cylindrical, the length is 50 mm, and the diameter is 10 mm.

[0026] The hard plastic shell 1 is a hollow cylinder with an inner diameter of 10mm, an outer diameter of 12mm and a length of 62mm. The hard plastic shell 1 is made of transparent hard plastic, and its surface is printed with scale lines for reading the discoloration length of the test rod 2 inside it.

[0027] One e...

Embodiment 2

[0029] A method for preparing a gravity adsorption test rod for quickly detecting the content of chloride ions in sand and gravel materials, the details are as follows:

[0030] (1) Prepare 300 mL of silver chromate solution with a mass concentration of 5 g / L, put it into a beaker, and then add water-absorbing silica gel and 0.05 g of polycarboxylate water reducer.

[0031] (2) Weigh 5.9 g of cotton fiber and soak it in the solution prepared in (1) for 1 min.

[0032] (3) Stir the solution described in (2) for 10 min with a stirrer at a speed of 1000 r / min to make a cotton fiber composite base core.

[0033] (4) Put the cotton fiber composite base core prepared in (3) into a mold and vibrate for 3 minutes, then place it in a blast drying oven, and dry it at a temperature of 50°C.

[0034] (5) Weigh 0.5 g of color-changing silica gel, and evenly apply it on the surface of one end of the dried product obtained in (4) to obtain the final product.

[0035] (6) Put the final prod...

Embodiment 3

[0037] A method for detecting chloride ion content in sand and gravel slurry. Use a straw to absorb the filtrate filtered from the sand and gravel material, and then drop the filtrate into the vertically placed test rod through the open end, and the color-changing silica gel at the bottom of the test rod will change color. Finally, read the discoloration length of the test rod and compare it with the discoloration length data of the sample, so as to obtain the chloride ion content in the sand and gravel slurry. details as follows:

[0038] (1) suck the filtrate filtered out from the gravel material with a straw;

[0039] (2) Put the test rod vertically, with the open end facing up, and slowly drop the filtrate in the straw into the open end of the test rod;

[0040] (3) When the filtrate is dripped, observe the discoloration of the discoloration silica gel at the bottom of the test rod;

[0041] (4) When the color-changing silica gel at the bottom of the test rod turns red, ...

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Abstract

The invention discloses a gravity adsorption type test rod for rapidly detecting the content of chloride ions in a sandstone material, a preparation method and application thereof. The test rod comprises a hard plastic shell with scales and a test rod body wrapped in the hard plastic shell, the test rod body is composed of cotton fibers, allochroic silica gel, silver chromate and a polycarboxylicacid water reducing agent, one end of the hard plastic shell is closed and used for fixing the test rod body, and the other end of the hard plastic shell is in an open state. Filtrate filtered from the sandstone material is sucked by a suction pipe, the filtrate is dripped into a vertically placed test rod body through an opening end, the color change length of the test rod body is read after thecolor of the allochroic silica gel at the bottom of the test rod body changes, and is compared with the color change length data of the sample, thereby obtaining the content of chloride ions in the sandstone slurry. The test rod disclosed by the invention has the characteristics of small size, convenient use, high stability, low cost and the like, is large in monitoring range and wide in application range, and has a good development prospect.

Description

technical field [0001] The invention belongs to the field of engineering detection, and in particular relates to a gravity adsorption type test rod for rapidly detecting the content of chloride ions in sand and gravel materials, a preparation method and application thereof. Background technique [0002] Corrosion of steel bars will lead to a decline in the stability of concrete structures. A large number of early concrete structures deteriorated before their useful life, leading to premature failure of the structure and causing huge direct and indirect losses. The economic loss caused by concrete has always been a major concern in countries all over the world. Chloride corrosion is one of the main causes of corrosion of steel bars. If the content of chloride ions in the sand and gravel is too high, it will inevitably cause the corrosion of the steel bars in the concrete and the decrease of the durability of the concrete, which will cause the damage of the concrete buildings...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N1/14
CPCG01N1/14G01N21/78
Inventor 宋子健刘浪刘晴阳张英杰蒋林华储洪强
Owner HOHAI UNIV
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