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A method for detecting periclase content in cement clinker

A technology of cement clinker and detection method, which is applied in the direction of chemical analysis by titration method, analysis by making materials undergo chemical reactions, and material analysis by observing the impact on chemical indicators, etc., which can solve the problems of long extraction time and square Problems such as large magnesia content, etc., achieve the effects of improving dispersion, efficient separation, and correct evaluation of stability

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

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for detecting periclase content in cement clinker, the steps are as follows:

[0023] S01, the cement clinker is broken and crushed and sieved (0.075mm square hole sieve, the same below), to obtain a clinker sample;

[0024] 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%;

[0025] S03. Weigh 0.2g of the clinker sample and place it in a 150mL ground-necked flask, add 16g of the prepared shielding agent, close the bottle mouth, place it in a 60°C water bath for heat preservation for 20min, and cool to room temperature;

[0026] S04. Add 10 g of ammonium nitrate and 40 g of absolute ethanol simultaneously to the ground-mouth flask, heat to reflux at 85° C. for 1 h, suction filter while hot, wash the precipitate with hot absolute ethanol and incorporate into the filtrate;

[0027] S05. After the filtrate obtained in step S04 was cool...

Embodiment 2

[0040] A method for detecting periclase content in cement clinker, the steps are as follows:

[0041] S01, the cement clinker is broken and crushed and sieved (0.075mm square hole sieve, the same below), to obtain a clinker sample;

[0042] 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 80%;

[0043] S03. 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 water bath at 50°C for heat preservation for 15min, and cool to room temperature;

[0044] S04. Add 12 g of ammonium nitrate and 30 g of absolute ethanol simultaneously to the ground-mouth flask, heat to reflux at 85° C. for 4 h, suction filter while hot, wash the precipitate with hot absolute ethanol and incorporate into the filtrate;

[0045] S05. After the filtrate obtained in step S04 was c...

Embodiment 3

[0047] A method for detecting periclase content in cement clinker, the steps are as follows:

[0048] S01, the cement clinker is broken and crushed and sieved (0.075mm square hole sieve, the same below), to obtain a clinker sample;

[0049] S02, according to the mass ratio of castor oil and absolute ethanol is 15:1, mix and prepare to obtain shielding agent, wherein the content of ricinoleic acid in castor oil is 80%;

[0050] S03. 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 55°C ultrasonic water bath for 10 minutes of ultrasonic and heat preservation treatment, and cool to room temperature;

[0051] S04. Add 10 g of ammonium nitrate and 36 g of absolute ethanol simultaneously to the ground-mouth flask, heat to reflux at 90° C. for 2 h, suction filter while hot, wash the precipitate with hot absolute ethanol and incorporate into the filtrate;

[0052] S05. After th...

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Abstract

The invention discloses a method for detecting the content of periclase in cement clinker, which belongs to the technical field of building material detection, and comprises the following steps: S01, crushing the cement clinker and sieving to obtain a clinker sample; S02, according to castor oil and no The mass ratio of water to ethanol is 10-15:1, mixed and prepared to obtain a shielding agent; S03, take 1 mass part of clinker sample, add 40-80 mass parts of the shielding agent, and place it in an environment of 50-70°C for heat preservation treatment 10-20min; S04, add 40-60 parts by mass of ammonium nitrate and 150-200 parts by mass of absolute ethanol to step S03 at the same time, heat and reflux at 85-95°C for 1-4h, suction filter while it is hot, precipitate with heat-free Washing with water and ethanol is incorporated into the filtrate; after the filtrate obtained in S05 and step S04 is cooled to room temperature, the complexometric titration subtraction method is used to detect the periclase content; the present invention can separate solid solution magnesium oxide and periclase more efficiently, so that The detection results of phaclase are more real and accurate, which is beneficial to correctly evaluate 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 content of periclase in cement clinker. 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 all the magnesia in the ...

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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