Cement concrete strength improver

A technology of cement concrete and enhancer, applied in the field of cement concrete strength enhancer, can solve problems such as difficulty in enhancing strength and increase production cost, and achieve the effects of reducing production cost and improving cement strength

Inactive Publication Date: 2015-05-13
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding it to cement concrete in this state is difficult to improve the strength
Therefore, in order to decompose the agglomerate state of metakaolin, it is necessary to introduce crushing, grading and other processes after firing metakaolin, which increases the production cost

Method used

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  • Cement concrete strength improver
  • Cement concrete strength improver
  • Cement concrete strength improver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A cement concrete strength enhancer, in parts by weight, its preparation raw materials include 90 parts of granular metakaolin with a particle size of 10-3 μm, 10 parts of needle-shaped and long columnar metakaolin with a particle size of 10-3 μm; wherein, the granular metakaolin The aspect ratio of acicular and long columnar metakaolin is 2.9; the aspect ratio of metakaolin is 3.1;

[0028] The preparation method of metakaolin is:

[0029] (1) In parts by weight, weigh 80 parts of granular kaolinite with a particle size of 20 to 3 μm, and 20 parts of acicular and elongated columnar halloysite with a particle size of 10 to 3 μm; the aspect ratio of the granular kaolinite is 2.9; The aspect ratio of acicular and long columnar halloysite is greater than 4.6;

[0030] (2) Add the granular kaolinite and acicular and columnar halloysite weighed in step 1 into the mixer according to the proportion and mix until uniform;

[0031] (3) The mixture obtained in step 2 is roasted...

Embodiment 2

[0034] The same part of this example and Example 1 will not be repeated, the difference is: in parts by weight, weigh 90 parts of granular kaolinite with a particle size of 20-3 μm, and acicular and long columnar stones with a particle size of 10-3 μm Halloysite 10 parts.

Embodiment 3

[0036] The same parts of this example and Example 1 will not be repeated, the difference is: in parts by weight, weigh 50 parts of granular kaolinite with a particle size of 20-3 μm, and acicular and long columnar stones with a particle size of 10-3 μm Halloysite 50 parts.

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Abstract

The invention relates to a cement concrete strength improver. The cement concrete strength improver comprises the materials in parts by weight: 100 parts of granular metakaolin with the grain size of 10-3 microns and 10-100 parts of needle-shaped and columnar metakaolin with the grain size of 10-3 microns, wherein the length-width ratio of the granular metakaolin is less than 3, and the length-width ratio of the needle-shaped and columnar metakaolin is greater than 3. Compared with cement concrete without any additive, cement concrete into which the cement concrete strength improver is added has the advantages that the strength can be enhanced in the initial stage and the growth term.

Description

technical field [0001] The invention belongs to the technical field of building admixtures, in particular to a cement concrete strength enhancer. Background technique [0002] As we all know, metakaolin is an intermediate of amorphous structure obtained by heating kaolin clay minerals at 500-900 ° C. It is a highly active artificial pozzolan material that can make cement paste, mortar and concrete. The filling effect increases the compactness and enhances the strength. Kaolinite is a representative mineral of kaolin series clay minerals. It is generally flaky crystals of more than ten μm in size. After heating, it is easy to form anhydrous amorphous aluminum silicate metakaolin, but metakaolin is easy to agglomerate after cooling. Form clumps. Adding it to cement concrete in this state is difficult to improve the strength. Therefore, in order to decompose the agglomerate state of metakaolin, it is necessary to introduce crushing and grading processes after firing metakaol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/08
Inventor 袁海滨易伟欣李凯琦
Owner HENAN POLYTECHNIC UNIV
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