A method for detecting periclase content in cement clinker based on chemical method

A technology of cement clinker and chemical method, which is applied in the direction of material analysis by observing the influence of chemical indicators, chemical analysis by titration method, and analysis by making materials undergo chemical reactions, etc., which can solve the problem of periclase content value Large size, long extraction time, etc., to achieve the effect of improving dispersion, efficient separation, and ensuring contact

Active Publication Date: 2021-06-04
湖北建研科峰工程质量检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method not only takes a long time to extract, but also dissolves part of the silicate phase (solid solution magnesium oxide), resulting in a relatively large periclase content in the cement clinker

Method used

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  • A method for detecting periclase content in cement clinker based on chemical method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for detecting periclase content in cement clinker based on a chemical method, the steps are as follows:

[0024] S01, the cement clinker is broken and crushed and sieved (0.075mm square hole sieve, the same below), to obtain a clinker sample;

[0025] S02, according to the mass ratio of castor oil and absolute ethanol is 10:1, mix and prepare to obtain shielding agent, wherein the content of ricinoleic acid in castor oil is 85%;

[0026] S03, according to the mass ratio of absolute ethanol and glycerol is 3:1, mixed and prepared to obtain the extraction solvent;

[0027] S04. Weigh 0.2g of the clinker sample and place it in a 150mL ground-necked flask, add 12g of the prepared shielding agent, close the bottle mouth, place it in a 70°C water bath for heat preservation for 15min, and cool to room temperature;

[0028] S05, simultaneously add 12 g of ammonium nitrate and 50 g of the extraction solvent prepared in step S03 to the ground-mouth flask, heat to reflux...

Embodiment 2

[0042] A method for detecting periclase content in cement clinker based on a chemical method, the steps are as follows:

[0043] S01, the cement clinker is broken and crushed and sieved (0.075mm square hole sieve, the same below), to obtain a clinker sample;

[0044] S02, according to the mass ratio of castor oil and absolute ethanol is 16:1, mix and prepare to obtain shielding agent, wherein the content of ricinoleic acid in castor oil is 80%;

[0045] S03, according to the mass ratio of absolute ethanol and glycerol is 3:1, mixed and prepared to obtain the extraction solvent;

[0046] S04. Weigh 0.2g of the clinker sample and place it in a 150mL ground-necked flask, add 15g of the prepared shielding agent, close the bottle mouth, place it in a 55°C water bath for heat preservation for 20min, and cool to room temperature;

[0047] S05, simultaneously add 10 g of ammonium nitrate and 48 g of the extraction solvent prepared in step S03 to the ground-mouth flask, heat to reflux...

Embodiment 3

[0050] A method for detecting periclase content in cement clinker based on a chemical method, the steps are as follows:

[0051] S01, the cement clinker is broken and crushed and sieved (0.075mm square hole sieve, the same below), to obtain a clinker sample;

[0052] S02, according to the mass ratio of castor oil and absolute ethanol is 12:1, mix and prepare to obtain shielding agent, wherein the content of ricinoleic acid in castor oil is 88%;

[0053] S03, according to the mass ratio of absolute ethanol and glycerol is 3:1, mixed and prepared to obtain the extraction solvent;

[0054] S04. Weigh 0.2g of the clinker sample and place it in a 150mL ground-necked flask, add 8g of the prepared shielding agent, close the bottle mouth, place it in a 60°C ultrasonic water bath for 20 minutes of ultrasonic and heat preservation treatment, and cool to room temperature;

[0055] S05, simultaneously add 8 g of ammonium nitrate and 44 g of the extraction solvent prepared in step S03 to th...

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Abstract

The invention discloses a method for detecting the periclase content in cement clinker based on a chemical method, which belongs to the technical field of building material detection. The invention first uses a shielding agent to treat the cement clinker, and then uses nitric acid in an anhydrous ethanol-glycerin mixed solvent system Extracting periclase with ammonium can more efficiently separate solid solution magnesia and periclase, making the detection results of periclase more real and accurate, which is conducive to correctly evaluating the stability of cement clinker.

Description

technical field [0001] The invention belongs to the technical field of building material detection, in particular to a method for detecting the periclase content in cement clinker based on a chemical method. Background technique [0002] Cement is obtained by grinding cement clinker with appropriate amount of gypsum and mixed materials, and is a hydraulic cementitious material that can firmly bond sand, stone and other materials together. The quality of cement mainly depends on the quality of clinker. Magnesium oxide (MgO) in cement clinker can be divided into solid solution magnesium oxide and free magnesium oxide (periclase) according to its existence. According to Chinese standards, the content of magnesia in cement shall not exceed 5% (mass fraction, the same below), and the allowable content of magnesia shall be relaxed to 6% for the cement whose stability has passed the autoclave test. However, the magnesia that really affects the long-term stability of cement is not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N31/16
CPCG01N21/78G01N31/16
Inventor 陈万友
Owner 湖北建研科峰工程质量检测有限公司
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