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Model making and characterization method of magnesium oxychloride cement foam concrete pore structure based on magnesium phosphate cement

A technology of magnesium oxychloride cement and foam concrete, which is applied to ceramic products, manufacturing tools, ceramic molding machines, etc., can solve the problems that the depth of the pore structure is not accurately displayed, and the real situation of the internal pores of the foam concrete cannot be directly reflected.

Active Publication Date: 2021-06-08
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its biggest disadvantage is that it can only get a virtual picture of the foam concrete structure, and there is no accurate display of the depth of the hole structure
[0009] Through the above analysis, it is found that no matter the calculation method or the image method, each method can basically only reflect the parameters of one kind of hole, and the above method cannot directly reflect the real situation of the inner hole of the foam concrete

Method used

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  • Model making and characterization method of magnesium oxychloride cement foam concrete pore structure based on magnesium phosphate cement
  • Model making and characterization method of magnesium oxychloride cement foam concrete pore structure based on magnesium phosphate cement
  • Model making and characterization method of magnesium oxychloride cement foam concrete pore structure based on magnesium phosphate cement

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Effect test

Embodiment 1

[0041] A method for making a pore structure model of magnesium oxychloride cement foam concrete based on magnesium phosphate cement, comprising the following steps:

[0042] Select a representative magnesium oxychloride cement foam concrete, and cut out the cross-section. The cross-section is kept clean and tidy, and the cut-off sample size is 100mm×100mm×100mm;

[0043] Magnesium phosphate cement is prepared by putting magnesium oxide, phosphate and modifier into a ball mill for pulverization and mixing to obtain MPC dry powder. , magnesite or dolomite ore calcined inactive magnesium oxide powder, the phosphate is ammonium dihydrogen phosphate, the modifier is borax, magnesium oxide, phosphate and modified The particle size of agent is all less than 75 μ m, and the mass ratio of described magnesia, described phosphate, described modifying agent is 1.5:1:0.1; Add distilled water in described MPC dry powder and mix into magnesium phosphate cement slurry, described MPC The mass...

Embodiment 2

[0058] A method for making a pore structure model of magnesium oxychloride cement foam concrete based on magnesium phosphate cement, comprising the following steps:

[0059] Select a representative magnesium oxychloride cement foam concrete, and cut out the cross-section. The cross-section is kept clean and tidy, and the cut-off sample size is 100mm×100mm×100mm;

[0060] Magnesium phosphate cement is prepared by putting magnesium oxide, phosphate and modifier into a ball mill for pulverization and mixing to obtain MPC dry powder. , magnesite or dolomite ore calcined inactive magnesium oxide powder, the phosphate is ammonium dihydrogen phosphate, the modifier is borax, magnesium oxide, phosphate and modified The particle size of agent is all less than 75 μ m, and the mass ratio of described magnesia, described phosphate, described modifying agent is 2:1:0.08; Add distilled water in described MPC dry powder and mix into magnesium phosphate cement slurry, described MPC The mass ...

Embodiment 3

[0068] A method for making a pore structure model of magnesium oxychloride cement foam concrete based on magnesium phosphate cement, comprising the following steps:

[0069] Select a representative magnesium oxychloride cement foam concrete, and cut out the cross-section. The cross-section is kept clean and tidy, and the cut-off sample size is 100mm×100mm×100mm;

[0070] Magnesium phosphate cement is prepared by putting magnesium oxide, phosphate and modifier into a ball mill for pulverization and mixing to obtain MPC dry powder. , magnesite or dolomite ore calcined inactive magnesium oxide powder, the phosphate is potassium dihydrogen phosphate, the modifier is citric acid, magnesium oxide, phosphate and modifier in the MPC dry powder The particle size of the modifier is all less than 75 μm, and the mass ratio of the magnesium oxide, the phosphate, and the modifying agent is 1.5:1:0.1; adding distilled water to the MPC dry powder is mixed into a magnesium phosphate cement slu...

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Abstract

The invention discloses a method for making a pore structure model of magnesium oxychloride cement foam concrete based on magnesium phosphate cement. Using the hydrolysis characteristics of MOC in water and the water resistance of magnesium phosphate cement, the magnesium phosphate cement with excellent water resistance is tiled on the MOC foam On the concrete section, a magnesium phosphate cement-MOC foam concrete integral specimen is formed; then the magnesium phosphate cement-MOC foam concrete integral specimen is hydrolyzed, and the remaining part is the pore structure model of the magnesium oxychloride cement foam concrete. The obtained magnesium phosphate cement forms an intuitive model of the internal pore structure of concrete. By using microscopes, SEM and other instruments to observe various characteristic parameters of the pores, this characterization method can not only see the internal pore structure of MOC foam concrete more intuitively, but also characterize Various parameters of the internal pores of MOC foam concrete are obtained. The method of testing different hole parameters with one method is simple and easy, which simplifies the scientific research approach.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for making and characterizing the pore structure model of magnesium oxychloride cement foam concrete based on magnesium phosphate cement. Background technique [0002] Foamed concrete is made of mineral admixtures, cement-based materials, etc. as the main cementitious material, adding water and admixtures, and can also add fine sand or some lightweight aggregates to make a slurry, which is foamed by a foaming agent. It is a lightweight concrete material that contains a large number of independent, small and evenly distributed air cells that are poured and cured at the construction site or factory. Due to the large number of closed air cells inside, foam concrete not only has light weight and thermal insulation properties, but also has a "breathing" function, which can improve the comfort of the living environment. The dry bulk density of foam conc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/34C04B38/00B28B19/00
CPCB28B19/00C04B28/342C04B2111/40C04B24/06C04B24/10C04B24/00C04B22/08C04B38/00
Inventor 李宝兰郑卫新丁秀萍
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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