Method of 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, material analysis by observing the influence of chemical indicators, etc., and can solve the problem of periclase content value Large size, long extraction time and other problems, to achieve the effect of improving dispersion, efficient separation, real and accurate detection results

Active Publication Date: 2019-02-22
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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  • Method of 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 50°C water bath 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 cool...

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 an ultrasonic water bath at 55°C for ultrasonic and heat preservation for 10min, 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 the filtrate...

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Abstract

The invention discloses a method of detecting periclase content in cement clinker and belongs to the technical field of detection of building materials. The method comprises the steps of S01, crushingcement clinker, crushing, and screening to obtain a clinker sample; S02, mixing castor oil and anhydrous ethyl alcohol in a mass ratio of (10-15):1 to obtain a shielding agent; S03, adding 1 part bymass of the clinker sample into 40-80 parts by mass of the shielding agent, and holding the temperature of 50-70 DEG C for 10-20 min; S04, adding 40-60 parts by mass of ammonium nitrate and 150-200 parts by mass of anhydrous ethyl alcohol to the obtained material of step S03, heating at 85-95% to allow refluxing for 1-4 h, performing suction filtering while the temperature is high, washing the precipitate with hot anhydrous ethyl alcohol, and combining the washed precipitate with the filtrate; S05, cooling the filtrate of the step S04 to room temperature, and detecting periclase content by means of complexometric titration difference process. The method herein is suitable for more efficiently separating solid-solution magnesia and periclase, detection results for periclase are more real and accurate, and stability of the cement clinker can be correctly estimated.

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 Applications(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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