Method for quickly analyzing phase component of building gypsum

A technology for composition analysis and plaster of Paris, which is applied in the direction of removing certain components and weighing, etc., can solve the problems of high requirements for analytical instruments, high requirements for analysis conditions, and long analysis time, so as to avoid the interference of human factors and simplify the test. Operational process, the effect of shortening the test time

Inactive Publication Date: 2011-09-07
SHANGHAI RES INST OF BUILDING SCI CO LTD
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Problems solved by technology

The disadvantages of the prior art are: high requirements for analytical instruments; high requirements for analysis conditions; long analysis time; complicated operation steps; if any of these factors cannot be satisfied, the accuracy and stability of the analysis results will be greatly affected

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  • Method for quickly analyzing phase component of building gypsum

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Embodiment Construction

[0071] The present invention will be further described below through specific embodiments.

[0072] In order to illustrate the accuracy and good repeatability of the analysis method of building gypsum phase composition, four samples were sent to the laboratory of Shanghai Academy of Building Research, the laboratory of Huaneng Shidongkou No. 1 Power Plant and the laboratory of Shanghai Waigaoqiao Power Plant. For the test, the three laboratories all used the HS-43 halogen moisture analyzer produced by Mettler. A, B, C, and D adopt this patent: a rapid phase composition analysis method of building gypsum, and a, b, c, and d adopt the alcohol solution hydration method (normal pressure drying). A corresponds to a, and so on. The results of the two groups are listed in the table below, and the variance statistics are compared. It can be seen from the following table that the three laboratories adopt this patent: the experimental results measured by a rapid phase composition anal...

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Abstract

The invention belongs to the technique of building material analysis and relates to a method for quickly analyzing a phase component of building gypsum. The defects in the prior art are as follows: the demand on analytical instrument is high, the demand on the test condition is high, the analysis time is long and the operation steps are complex. The method comprises the following three steps: for quickly finishing the phase component analysis for the building gypsum, by utilizing the principle that the building gypsum loses the adhered water at 50 plus/minus 5 DEG C, loses all the crystal water above 180 DEG C and can have hydration reaction with water, the anhydrous gypsum in the building gypsum can combine with water in a 95% ethanol solution so as to form the hemi-hydrated gypsum, and the dihydrate gypsum cannot be generated by combining the hemi-hydrated gypsum with the water, wherein the three steps are as follows: measuring the contents of the adhered water and the anhydrous gypsum, measuring the content and purity of the hemi-hydrated gypsum, and measuring the content of the dihydrate gypsum. The method provided by the invention has the advantages that the analysis device is simple, only one halogen moisture tester is required, the test time is short, and the analysis result has stability and repeatability.

Description

technical field [0001] The invention belongs to building material analysis technology, in particular to a rapid phase composition analysis method of building gypsum. Background technique [0002] Building gypsum is made from dihydrate gypsum through high-temperature calcination, and β hemihydrate gypsum CaSO 4 1 / 2H 2 O is the main component. During the calcination process, a certain amount of soluble anhydrite type III CaSO tends to be produced 4 and undehydrated dihydrate gypsum CaSO 4 2H 2 O. [0003] The prior art shows that the performance of building gypsum is related to the ratio of the three phases of hemihydrate gypsum, soluble anhydrite and undehydrated dihydrate gypsum, and also related to the impurities it contains. This requires accurate analysis of the content of each phase in the building gypsum to control the quality of the building gypsum. [0004] There are many analytical methods for determining the phase composition of building gypsum at home and ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
Inventor 谈晓青陈宁
Owner SHANGHAI RES INST OF BUILDING SCI CO LTD
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