Preparation method of directional porous special cement

A cement and cement-based technology, which is applied in the production of porous materials and the preparation of directional porous cement, can solve the problems of few reports and so on.

Active Publication Date: 2015-03-11
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many reports on the preparation of oriented porous ceramic materials by freeze-drying at home and abroad, and the related preparation methods and technical applications are relatively mature, but there are relatively few reports on the preparation of cement materials into porous materials.

Method used

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  • Preparation method of directional porous special cement
  • Preparation method of directional porous special cement
  • Preparation method of directional porous special cement

Examples

Experimental program
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Effect test

Embodiment 1

[0044] A preparation method of directional porous cement, comprising the following steps:

[0045] The first is the preparation of cement-based slurry: take Portland cement powder 100g, tert-butanol 100g, ammonium polyacrylate 0.5g, ethyl cellulose 1g according to the ratio of parts by mass, put Portland cement powder into tert-butanol , add ammonium polyacrylate and perform mechanical stirring for 1 hour to obtain a fully mixed mixture. Using zirconia as the ball milling medium, put the organic mixture and ethyl cellulose into a stainless steel ball mill tank for 24 hours to make the cement-based mixture The material is uniformly dispersed, thereby obtaining a cement-based slurry with a solid content of 50wt%;

[0046] said

[0047]

[0048] The second is the production of the frozen body: put the fully mixed cement-based slurry into a vacuum drying box for vacuum degassing, and then cast the cement-based slurry after removing air bubbles into a self-made freezing mold fo...

Embodiment 2

[0054] A preparation method of directional porous cement, comprising the following steps:

[0055] The first is the preparation of cement-based slurry: Take 80g of composite Portland cement powder, 120g of alkene, 0.4g of citric acid, and 1.5g of polyvinyl butyral according to the ratio of parts by mass, and put the composite Portland cement powder into Add citric acid to olefin, and carry out mechanical stirring for 5 hours to obtain a fully mixed mixture. Using zirconia as the ball milling medium, put the mixture and polyvinyl butyral in a stainless steel ball mill tank for 12 hours to make the cement The base mixed material is uniformly dispersed to obtain a cement-based slurry with a solid content of 40wt%;

[0056] said

[0057]

[0058] The second is the production of the frozen body: put the fully mixed cement-based slurry into a vacuum drying box for vacuum degassing, and then cast the cement-based slurry after removing air bubbles into a self-made freezing mold fo...

Embodiment 3

[0064] A preparation method of directional porous cement, which is special in that it comprises the following steps:

[0065] The first is the preparation of cement-based slurry: Take 60g of ordinary Portland cement powder, 140g of ketone, 0.3g of methacrylic acid, and 2g of polyethylene according to the ratio of parts by mass, put the ordinary Portland cement powder into the ketone, Add methacrylic acid and carry out mechanical stirring for 1.5 hours to obtain a fully mixed mixture. Use alumina balls as the ball milling medium, put the mixture and polyethylene into a stainless steel ball mill tank for 36 hours to make the cement-based mixed material evenly dispersed , so as to obtain a cement-based slurry with a solid content of 30wt%;

[0066] said

[0067]

[0068] The second is the production of the frozen body: put the fully mixed cement-based slurry into a vacuum drying box for vacuum degassing, and then cast the cement-based slurry after removing air bubbles into a ...

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Abstract

The invention relates to a preparation method of cement, and in particular relates to a preparation method of directional porous special cement, which belongs to the technical field of a porous material manufacturing method. The preparation method comprises the following four steps of preparation of cement-based slurry, manufacturing of frozen green body, manufacturing of cement-based porous biscuit, and maintaining of the biscuit. According to the preparation method, the process is simple, and the cost is low; the method for preparing the directional porous special cement has the advantages that the opening porosity of the prepared porous material is 50-80% and the average aperture is 0.1-500 micrometers; various organic binders and the dosage are selected, the collapse degree of the biscuit can be reduced and the strength of the biscuit can be improved, and the performance of the final style is affected; as the porous material is prepared by directional freezing, the shape of special pore can be obtained easily and the style with complex shape can be obtained easily; due to the adoption of the method for maintaining in a constant-temperature constant-humidity box to obtain the final style, more energy is saved, the environment is protected, the economic benefit is preferable, and the damage to a sample is slight.

Description

technical field [0001] The invention relates to a method for preparing cement, in particular to a method for preparing oriented porous cement, which belongs to the technical field of porous material manufacturing methods. Background technique [0002] At present, the methods for preparing porous materials mainly include foaming method, organic foam impregnation method, adding pore-forming agent method, solid particle sintering method, sol-gel method, isostatic pressing method and so on. The ideal preparation method not only requires the ability to prepare complex structures, the shape and size of the pores can be adjusted, and has certain mechanical properties, but also requires low cost and simple process. However, none of the present preparation methods can satisfy the ideal preparation method, and all have one or more disadvantages. The directional freeze-drying method can obtain porous materials with small collapse of the finished product, a wide range of porosity...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/04C04B28/04C04B28/06C04B28/34
Inventor 高学理董森杰付丽丽柳蒂
Owner OCEAN UNIV OF CHINA
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