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Cement additive

A technology of cement additives and initiators, applied in the field of cement, can solve the problems of difficult construction and operation, high cost, aging resistance, etc., and achieve the effect of strong price advantage and cost reduction.

Inactive Publication Date: 2015-12-02
TONGLING HAIYUAN SUPERFINE POWDER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 3. Liquid resin also has many problems such as storage and transportation inconvenience
[0007] For a long time, asphalt, linoleum and organic materials have been the main waterproof materials. Some materials are poisonous and odorous, difficult to operate and not resistant to aging.
For this reason, several kinds of rigid waterproof coatings have been introduced successively in China, but the cost is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, a cement additive, the parts by weight of various component ratios are as follows: 2 parts of polyvinyl alcohol, 2 parts of methyl acrylate, 0.5 parts of emulsion polystyrene butadiene rubber, 0.5 parts of sodium silicate or sodium metasilicate part, 0.5 part of sodium dodecyl sulfonate, 1 part of nano silicon dioxide and 1 part of initiator.

[0016] Its preparation method is as follows:

[0017] 1) Dissolve polyvinyl alcohol into water;

[0018] 2) Add ethyl acrylate to the solution and stir for 10 minutes;

[0019] 3) Continue to add polystyrene butadiene rubber to the solution and stir for 20 minutes;

[0020] 4) Add sodium silicate or metasilicate, sodium dodecylsulfonate and nano silicon dioxide to the solution, and stir for 10 minutes;

[0021] 5) Add the initiator to the solution and stir for 5 minutes;

[0022] 6) Put the obtained solution in a water bath and keep the temperature at 60°C;

[0023] 7) Bubble nitrogen into the solution for 2h. ...

Embodiment 2

[0024] Embodiment 2, a cement additive, the parts by weight of various component ratios are as follows: 4 parts of polyvinyl alcohol, 4 parts of methyl acrylate, 2.5 parts of emulsion polystyrene butadiene rubber, 1 part of sodium silicate or sodium metasilicate 1 part, 1 part of sodium dodecyl sulfonate, 1.5 parts of nano silicon dioxide and 2.5 parts of initiator.

[0025] Its preparation method is as follows:

[0026] 1) Dissolve polyvinyl alcohol into water;

[0027] 2) Add ethyl acrylate to the solution and stir for 25 minutes;

[0028] 3) Continue to add polystyrene butadiene rubber to the solution and stir for 45 minutes;

[0029] 4) Add sodium silicate or metasilicate, sodium dodecylsulfonate and nano silicon dioxide to the solution, and stir for 20 minutes;

[0030] 5) Add the initiator to the solution and stir for 8 minutes;

[0031] 6) Put the obtained solution in a water bath and keep the temperature at 90°C;

[0032] 7) Bubble nitrogen into the solution for 1...

Embodiment 3

[0033] Embodiment 3, a cement additive, the parts by weight of various component ratios are as follows: 3 parts of polyvinyl alcohol, 3 parts of methyl acrylate, 1 part of emulsion polystyrene butadiene rubber, 1 part of sodium silicate or sodium metasilicate 1 part, 1 part of sodium dodecyl sulfonate, 1 part of nano silicon dioxide and 2 parts of initiator.

[0034] Its preparation method is as follows:

[0035] 1) Dissolve polyvinyl alcohol into water;

[0036] 2) Add ethyl acrylate to the solution and stir for 15 minutes;

[0037] 3) Continue to add polystyrene butadiene rubber to the solution and stir for 30 minutes;

[0038] 4) Add sodium silicate or metasilicate, sodium dodecylsulfonate and nano silicon dioxide to the solution, and stir for 15 minutes;

[0039] 5) Add the initiator to the solution and stir for 7 minutes;

[0040] 6) Put the obtained solution in a water bath and keep the temperature at 75°C;

[0041] 7) Bubble nitrogen into the solution for 8h.

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PUM

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Abstract

The invention discloses a cement additive which comprises the following components in parts by weight: 2-4 parts of polyvinyl alcohol, 2-4 parts of methyl acrylate, 0.5-2.5 parts of emulsion polymerized butadiene styrene rubber, 0.5-1 part of sodium silicate or sodium metasilicate, 0.5-1 part of sodium dodecyl sulfonate, 1-1.5 parts of nano silicon dioxide and 1-2.5 parts of an initiator. Polyvinyl alcohol and polyacrylate form a copolymer by adopting a free radical polymerization method, and advantages of polyvinyl alcohol and polyacrylate which are matched with emulsion polymerized butadiene styrene rubber, sodium silicate or sodium metasilicate, sodium dodecyl sulfonate and nano silicon dioxide are fully utilized to prepare a copolymer cement waterproof additive suitable for waterproof cement. The production cost of raw materials used by the additive disclosed by the invention is lower than that of a marketed waterproof emulsion at present, and the cost is further lowered in quantity production. The cement additive disclosed by the invention has a relatively strong price advantage.

Description

technical field [0001] The invention relates to the field of cement, in particular to a cement additive for waterproofing. Background technique [0002] The polymers used to prepare polymer cement waterproof concrete can be divided into three types, namely polymer emulsions, water-soluble polymers, and liquid resins. At present, the most commonly used and the best modification effect is polymer emulsion. [0003] 1. The main components of polymer emulsion are polymer particles (size 0.1-1μm), emulsifier, stabilizer, dispersant, etc., and its solid phase content is between 40% and 70%. The polymer particles are uniformly dispersed in the aqueous solution through the action of the emulsifier to form an emulsion, and under the action of the dispersant and the stabilizer, the emulsion can be kept for a long time without segregation and flocculation. In addition, in order to prevent the air bubbles brought in by the emulsion from affecting the quality of the concrete, a certa...

Claims

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Application Information

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IPC IPC(8): C04B24/24
Inventor 王东蒋海托刘英汪清王玉舟
Owner TONGLING HAIYUAN SUPERFINE POWDER
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