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Cement additive

A technology for cement additives and reinforcing agents, applied in the field of cement additives, can solve the problems of complex reactions of organic additives, complex components, and large power consumption of cement grinding, so as to reduce the phenomenon of overgrinding, improve grinding efficiency, and improve flow. sexual effect

Inactive Publication Date: 2015-06-17
马健
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing cement additives are generally composed of organic or inorganic substances. Inorganic additives have complex components and high cost. They are prone to demulsification and even lead to material failure under unfavorable storage conditions. Organic additives react complexly and slowly. , the power consumption of cement grinding is large, which is lacking in improving the quality of cement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A cement additive, made from the following raw materials in parts by weight: 35 parts of triisopropanolamine, 2 parts of triethanolamine, 10 parts of dispersible polymer, 8 parts of polycarboxylate water reducer, and 1 part of short chemical fiber , 15 parts of bentonite, 1 part of sodium polyacrylate, and 1 part of reinforcing agent, wherein the reinforcing agent is mixed with slag and limestone in a weight ratio of 1:1, and its particle size is 200 mesh.

[0017] The method for preparing the cement additive is:

[0018] 1) Mix triisopropanolamine, triethanolamine and sodium polyacrylate according to the measurement, and dissolve them in water, stir evenly, concentrate, and then dry to obtain powder a;

[0019] 2) Add the polycarboxylate superplasticizer into the bentonite according to the measurement, stir evenly and dry at 100°C for 2 hours, grind it into a powder with a particle size of 300 mesh, then add the dispersible polymer and step 1) to obtain Mix the powder...

Embodiment 2

[0022] A cement additive, made from the following raw materials in parts by weight: 20 parts of triisopropanolamine, 10 parts of triethanolamine, 25 parts of dispersible polymer, 2 parts of polycarboxylate water reducer, 7 parts of short chemical fiber , 8 parts of bentonite, 5 parts of sodium polyacrylate, and 5 parts of reinforcing agent, wherein the reinforcing agent is mixed with slag and limestone in a weight ratio of 1:1, and its particle size is 300 mesh.

[0023] The method for preparing above-mentioned cement additive is:

[0024] 1) Mix triisopropanolamine, triethanolamine and sodium polyacrylate according to the measurement, and dissolve them in water, stir evenly, concentrate, and then dry to obtain powder a;

[0025] 2) Add the polycarboxylate superplasticizer into the bentonite according to the measured amount, stir evenly and dry at 160°C for 0.5 hours, grind it into a powder with a particle size of 200 mesh, then add the dispersible polymer and step 1) to obtai...

Embodiment 3

[0028] A cement additive, made from the following raw materials in parts by weight: 30 parts of triisopropanolamine, 7 parts of triethanolamine, 20 parts of dispersible polymer, 5 parts of polycarboxylate water reducer, 3 parts of short chemical fiber , 11 parts of bentonite, 4 parts of sodium polyacrylate, and 3 parts of reinforcing agent, wherein the reinforcing agent is mixed with slag and limestone in a weight ratio of 1:1, and its particle size is 300 mesh.

[0029] The method for preparing the cement additive is the same as in Example 2.

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Abstract

The invention discloses a cement additive. The cement additive is prepared from the following raw materials in parts by weight: 20-35 parts of triisopropanolamine, 2-10 parts of triethanolamine, 10-25 parts of dispersible polymer, 2-8 parts of polycarboxylate superplasticizer, 1-7 parts of chemical short fibers, 8-15 parts of bentonite, 1-5 parts of sodium polyacrylate and 1-5 parts of enhancer. The cement additive is compounded by use of inorganic matters and organic matters, and is non-toxic and odorless; the cement additive is capable of improving the fluidity of the cement, improving the grinding efficiency of a grinder and reducing the phenomenon of over-grinding of the cement, and therefore, the cement quality can be improved and the cost can be relatively low.

Description

technical field [0001] The invention relates to a building material, in particular to a cement additive. Background technique [0002] Cement additives refer to additives added to improve or achieve various characteristics during cement application, such as quick-drying or strengthening, such as water reducing agents, and water content reduction, such as setting retarders. Cement additive is a title in foreign countries. In China, both cement additives and cement admixtures refer to cement grinding aids. [0003] Cement additive is a chemical additive to improve the grinding effect and performance of cement, which can significantly increase the output of cement grinding table and the strength of cement at various ages. Cement additives can greatly reduce the phenomenon of electrostatic adsorption and encapsulation formed in the grinding process, and can reduce the tendency of re-agglomeration of ultrafine particles formed in the grinding process, reducing the phenomenon of ...

Claims

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Application Information

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IPC IPC(8): C04B24/26C04B24/12
Inventor 马健
Owner 马健
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