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Measuring method for MB value of recycled micro-powder

A technology of regenerated micropowder and determination method, which is applied in the preparation of test samples and analysis using chemical indicators, etc. It can solve the problems of low detection accuracy and unclear color halo at the end point of judgment, and achieve obvious color halo, mud powder and stone powder The effect of content increase and accuracy difficulty

Inactive Publication Date: 2014-09-24
北京东方建宇混凝土科学技术研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that there is no method for measuring the recycled micropowder in the recycled aggregate in the prior art, thereby proposing a method for measuring the MB value of the recycled micropowder, and further solving the problem of methylene blue MB in the prior art. In the process of value determination, the color halo of the end point is not clear enough and the detection accuracy is low

Method used

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  • Measuring method for MB value of recycled micro-powder
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  • Measuring method for MB value of recycled micro-powder

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Preparation of methylene blue solution: put methylene blue powder in an oven, dry at 105°C to constant weight, weigh 10.03g of dried methylene blue powder, pour the methylene blue powder Put it into a beaker filled with 600ml of distilled water, heat the distilled water and keep it at 35°C, keep stirring for 40min, after the methylene blue powder dissolves, cool to room temperature; transfer the obtained solution into a 1000ml volumetric flask and add distilled water to dilute to scale, then transfer the solution in the volumetric flask to a dark storage bottle and store it in a dark place, mark the date of preparation and the shelf life, and then obtain the methylene blue solution, and the shelf life of the methylene blue solution is 28 days;

[0028] (2) Weigh 400.3g of the regenerated micropowder sample, put it in an oven, and dry it at 102°C to constant weight. After the regenerated micropowder is cooled to room temperature, sieve out particles with a particle si...

Embodiment 2

[0037] The assay method of the regenerated micropowder MB value described in the present embodiment, comprises the steps:

[0038] (1) Preparation of methylene blue solution: put methylene blue powder in an oven, dry at 100°C to constant weight, weigh 5.02g of dried methylene blue powder, pour the methylene blue powder Put it into a beaker containing 300ml of distilled water, heat the distilled water and keep it at 35°C, keep stirring for 30min, after the methylene blue powder dissolves, cool to room temperature; transfer the obtained solution into a 500ml volumetric flask and add distilled water to dilute to scale, then transfer the solution in the volumetric flask to a dark storage bottle and store it in a dark place, mark the date of preparation and the shelf life, and then obtain the methylene blue solution, and the shelf life of the methylene blue solution is 28 days;

[0039] (2) Weigh 150.3g of regenerated micropowder, put it in an oven, and dry it at 100°C to constant ...

Embodiment 3

[0046] The assay method of the regenerated micropowder MB value described in the present embodiment, comprises the steps:

[0047] (1) Preparation of methylene blue solution: put methylene blue powder in an oven, dry at 102°C to constant weight, weigh 10.03g of dried methylene blue powder, pour the methylene blue powder Put it into a beaker filled with 600ml of distilled water, heat the distilled water and keep it at 38°C, keep stirring for 40min, after the methylene blue powder dissolves, cool to room temperature; transfer the obtained solution into a 1000ml volumetric flask and add distilled water to dilute to scale, then transfer the solution in the volumetric flask to a dark storage bottle and store it in a dark place, mark the date of preparation and the shelf life, and then obtain the methylene blue solution, and the shelf life of the methylene blue solution is 28 days;

[0048] (2) Weigh 250.2g of regenerated micropowder, put it in an oven, and dry it at 102°C to consta...

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Abstract

The invention discloses a measuring method for the MB value of recycled micro-powder. The measuring method comprises the steps that (1) a methylene blue solution is prepared; (2) a recycled micro-powder sample is prepared, and matrix powder of which the MB value is known is added into the recycled micro-powder sample to form mixed powder, wherein the weight ratio of the matrix powder to the recycled micro-powder sample is 1:1; (3) recycled micro-powder sample suspending liquid to be measured is prepared; (4) contamination testing is performed on the sample suspending liquid to be measured; (5) the volume of the added methylene blue solution is recorded when a chromatic halo lasts for 5 min, and the MB value of methylene blue of the recycled micro-powder is calculated. The detection method solves the technical problem that main components of recycled micro-powder in construction waste cannot be judged at present. In addition, the method is quick and accurate, thereby having great significance for comprehensive utilization of the recycled micro-powder. As the matrix powder of which the MB value is known is introduced into the sample to be measured, the halo is obvious in the contamination testing, and then the accuracy for determining the end point of the contamination testing is improved.

Description

technical field [0001] The invention belongs to the field of resource regeneration treatment of construction waste. Specifically, it relates to a method for measuring the MB value of regenerated micropowder. Background technique [0002] In recent years, with the acceleration of urbanization and small town construction in my country, the renewal of industrial and civil buildings, and the increasing scale of municipal relocation, the amount of construction waste generated by the disintegration of buildings has increased sharply. The composition of construction waste is complex, most of which are concrete, mortar, stone, brick and tile, and the rest are steel bars, wood blocks, glass, lime, plastic products, etc. The occupation of natural resources and the negative impact of construction waste on the environment make construction waste The recycling of recycled resources has become a research hotspot. The main technical approach is to crush, clean, classify and mix waste buil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/22G01N1/28
Inventor 王安岭武俊宇段遵莉赵玉芳李香李习章
Owner 北京东方建宇混凝土科学技术研究院有限公司
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