Quick test method for metakaolin activity used for inorganic polymer gelled material

An inorganic polymer, metakaolin technology, applied in the direction of chemical reaction of materials, material analysis by observing the effect on chemical indicators, etc. Metakaolin activity and other issues, to achieve the effect of low cost

Inactive Publication Date: 2008-12-03
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reactions of these two methods are different from those of preparing inorganic polymer gelling materials. Therefore, although they can distinguish whether metakaolin is active or not, there is no direct correspondence between the activity and the absorption, and they are not suitable for use. Evaluation of the activity of metakaolin

Method used

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  • Quick test method for metakaolin activity used for inorganic polymer gelled material
  • Quick test method for metakaolin activity used for inorganic polymer gelled material
  • Quick test method for metakaolin activity used for inorganic polymer gelled material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Kaolin is calcined in an experimental electric furnace with a heating rate of 10°C / min, kept at 800°C for 2 hours, and cooled to about 60°C to take out the material. Weigh 0.5002 g of the calcined metakaolin sample, pour it into 20 mL of standard hydrochloric acid with a mass percent concentration of 20% heated to 80° C. in a constant temperature water bath, and stir for 2 hours. Filter, pour the filtrate into a 200mL volumetric flask, and dilute to the mark at 200mL. Use a pipette to pipette 20 mL of the filtrate into a 300 mL jar, add 20 mL of acetic acid-ammonium acetate buffer solution to adjust the pH of the solution to 3, add 20 mL of 0.035 mol / L EDTA standard titration solution, and dilute to 100 mL with distilled water. Cover the bottle with a watch glass and boil for 2 minutes, then cool to room temperature. Add 2 mL of nitroso red salt as indicator, and titrate with 0.035 mol / L copper sulfate standard titration solution, the indicator changes from yellow to e...

Embodiment 2

[0064] Kaolin is calcined in an experimental electric furnace with a heating rate of 10°C / min, kept at 700°C for 2 hours, and cooled to about 60°C to take out the material. Weigh 0.5000 g of the calcined metakaolin sample, pour it into 20 mL of standard hydrochloric acid with a mass percent concentration of 20% heated to 80° C. in a constant temperature water bath, and stir for 2 hours. Filter, pour the filtrate into a 200mL volumetric flask, and dilute to the mark. Use a pipette to pipette 20 mL of the filtrate into a 300 mL jar, add 20 mL of acetic acid-ammonium acetate buffer solution to adjust the pH of the solution to 4.5, add 0.035 mol / L EDTA standard titration solution 20 mL, and dilute to 100 mL with distilled water. Cover the bottle with a watch glass and boil for 3 minutes, then cool to room temperature. Add 2.5 mL of nitroso red salt as indicator, and titrate with 0.035 mol / L copper sulfate standard titration solution, the indicator changes from yellow to emerald g...

Embodiment 3

[0068] The kaolin was calcined in an experimental electric furnace with a heating rate of 10°C / min, kept at 600°C for 2 hours, and cooled to about 60°C to take out the material. Weigh 0.5000 g of the calcined metakaolin sample, pour it into 20 mL of standard hydrochloric acid with a mass percent concentration of 20% heated to 80° C. in a constant temperature water bath, and stir for 2 hours. Filter, pour the filtrate into a 200mL volumetric flask, and dilute to the mark. Use a pipette to pipette 20 mL of the filtrate into a 300 mL jar, add 20 mL of acetic acid-ammonium acetate buffer solution to adjust the pH of the solution to 4.5, add 0.035 mol / L EDTA standard titration solution 20 mL, and dilute to 100 mL with distilled water. Cover the bottle with a watch glass and boil for 3 minutes, then cool to room temperature. Add 3 mL of nitroso red salt as indicator, and titrate with 0.035 mol / L copper sulfate standard titration solution, the indicator changes from yellow to emeral...

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Abstract

The invention discloses a rapid detection method for detecting the activity of inorganic polymer cement used metakaolin. The method comprises the steps of metakaolin preparation by hydrochloric acid dissolution and calcinations, complex reaction and titration; the hydrochloric acid is the standard hydrochloric acid with the mass percentage concentration of 20%, the dissolution is carried out for 2 hours at 80 DEG C; 2-3 ml of nitroso salt indicator is added to the solution obtained after the complex reaction, 0.035 mol / L of bluestone standard volumetric solution is used for titration with the end point that the yellow indicator is changed from emerald to grass green, and the activity of the metakaolin obtained through calcinations is evaluated through calculating the dissolution rate of alumina. The detection shows that a positive correlation exists between the intensity of a hardenite and the diction method when the same metakaolin is used with a sodium silicate solution for preparing inorganic polymer cement, The method for detecting the metakaolin has the characteristics of convenience, rapidness, exactness, low cost and so on, and only three hours is required for detecting a sample.

Description

technical field [0001] The invention relates to a method for quickly testing the activity of metakaolin used in inorganic polymer gelling materials, which is mainly used for quickly testing the activity of calcined kaolin used in preparing inorganic polymer gelling materials. technical background [0002] Inorganic polymer cementitious materials, also known as soil polymer materials and geopolymer materials (Geopolymer), are a general term for a class of polyaluminosilicate (Polysalate, Sialate is the abbreviation of silicon-oxo-aluminate) materials. Its formation mechanism is: at room temperature, using the chemical action of alkali to break and repolymerize the aluminum oxygen bond and silicon oxygen bond in metakaolin to form a polymeric aluminosilicate product with a frame-like zeolite structure, so it can be called "Inorganic polymer gelling materials". Inorganic polymer cementitious materials have excellent properties such as rapid early strength development, high lat...

Claims

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Application Information

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IPC IPC(8): G01N21/79
Inventor 殷素红文梓芸徐海军任俊徐小彬钟开红杨建军
Owner SOUTH CHINA UNIV OF TECH
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