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Preparation method for high-molecular compound-containing metakaolin-based geopolymer cement

A technology of high molecular compound and metakaolin, which is applied in the field of preparation of metakaolin-based soil-polymer cement, can solve the problems of low flexural strength and mechanical properties of soil-polymer cement to be improved, and achieve enhanced compressive strength, simple process, easy-to-operate effect

Inactive Publication Date: 2013-03-27
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Geopolymer cement has defects such as brittleness and low flexural strength, which usually affect its wide application. The mechanical properties of existing geopolymer cement need to be improved

Method used

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  • Preparation method for high-molecular compound-containing metakaolin-based geopolymer cement
  • Preparation method for high-molecular compound-containing metakaolin-based geopolymer cement
  • Preparation method for high-molecular compound-containing metakaolin-based geopolymer cement

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A method for preparing metakaolin-based soil polycement containing polymer compounds, which is to add 10-40 parts by mass of sodium hydroxide into 30-50 parts by mass of water glass (modulus 3.2), and stir to prepare alkali-excited cement. agent. Weigh 100-200 parts by mass of metakaolin, add 1-5 parts by mass of sodium tripolyphosphate and 1-5 parts by mass of sodium hexafluorosilicate, then add 40-60 parts by mass of alkali activator and 10-40 parts by mass part of water, mix and stir to form a slurry, and add 0.1-15 parts by mass of polyvinyl alcohol. After stirring for 5 minutes, pour into a mold of 20mm×20mm×20mm, put it into a curing box with a temperature of 20±3°C and a relative humidity of 90%-95% for 24 hours. Remove the mold and continue curing to the corresponding age (1d, 3d or 7d), to obtain the final product - metakaolin-based geopolymer cement containing polymer compounds. The compressive strength of the prepared cement added with polyvinyl alcohol was...

Embodiment 2

[0027] A method for preparing metakaolin-based soil polycement containing polymer compounds, which is to add 10-40 parts by mass of sodium hydroxide into 30-50 parts by mass of water glass (modulus 3.2), and stir to prepare alkali-excited cement. agent. Weigh 100-200 parts by mass of metakaolin, add 1-20 parts by mass of polyacrylamide, add 1-5 parts by mass of sodium tripolyphosphate and sodium hexafluorosilicate, mix well, and then add alkali activator 40- 60 parts by mass and 10-40 parts by mass of water, mixed and stirred for 5 minutes to form a slurry, and poured into a 20mm×20mm×20mm mold, placed in a room with a temperature of 20±3°C and a relative humidity of 90%-95%. Curing in the curing box for 24 hours. Remove the mold and continue curing to the corresponding age (1d, 3d or 7d) to obtain the final product - metakaolin-based soil-polymer cement containing polymer compounds. It is measured that the compressive strength of the prepared cement is higher than that of th...

Embodiment 3

[0029] A method for preparing metakaolin-based soil polycement containing polymer compounds, which is to add 10-40 parts by mass of sodium hydroxide into 30-50 parts by mass of water glass (modulus 3.2), and stir to prepare alkali-excited cement. agent. Weigh 100-200 parts by mass of metakaolin, add 1-15 parts by mass of epoxy resin, add 1-5 parts by mass of sodium tripolyphosphate and 1-5 parts by mass of sodium hexafluorosilicate, mix well, and then Add 40-60 parts by mass of alkali activator and 10-40 parts by mass of water, mix and stir for 5 minutes to form a slurry, and inject it into a mold of 20mm×20mm×20mm. Curing in the curing box for 90%-95% for 24 hours. Remove the mold and continue curing to the corresponding age (1d, 3d or 7d) to obtain the final product - metakaolin-based soil polycement containing polymer compounds. The compressive strength of the prepared cement was measured to be higher than that of the cement without epoxy resin added.

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Abstract

The invention discloses a preparation method for high-molecular compound-containing metakaolin-based geopolymer cement. The preparation method is characterized by comprising the steps: taking the following raw materials in parts by weight: 100 parts of metakaolin, 50-70 parts of alkali-activator, 10-30 parts of water, and 0.1-15 parts of high-molecular compound, wherein the alkali-activator is prepared by mixing 10-40 parts of sodium hydroxide and 30-50 parts of sodium silicate by weight, and the high-molecular compound is one of polyvinyl alcohol, polyacrylamide and epoxy resin; mixing and agitating the raw materials for 3-6min into pulp, and injecting into a mold for forming; and curing for 24h under conditions that the temperature is 19-23 DEG C and the relative humidity is 90-95%, demolding, and continuing curing in a standard curing box to obtain the product. By adopting the preparation method, the high-molecular compound-containing metakaolin-based geopolymer cement prepared has high strength and less emitted carbon dioxide, thereby being novel environment-friendly cement.

Description

technical field [0001] The invention belongs to the preparation of geopolymer cement, and relates to a preparation method of metakaolin-based geopolymer cement containing polymer compounds. The obtained geopolymeric cement is a new type of environmentally friendly green cement with good performance. Background technique [0002] Portland cement is an indispensable building material in construction engineering, but its production process consumes a lot of non-renewable resources and energy, seriously pollutes the environment, and its durability is insufficient. Geopolymer is a new type of inorganic high-polymer cementitious material developed in recent years, that is, geopolymer or geopolymer cement. It was first discovered and named by French scientist Professor Joseph Davidovits in the 1970s. Compared with Portland cement, geopolymeric cement has abundant raw material resources, low energy consumption and almost no pollution. The unique structure of the hydration product...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/04
Inventor 张驰王静罗学刚张亚萍
Owner SOUTHWEAT UNIV OF SCI & TECH
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