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High polymer powdery cement modifier production method

The technology of a cement modifier and its production method, which is applied in the field of cement additives, can solve the problems of short shelf life, low storage and transportation efficiency, and inconvenient storage and transportation, and achieve the advantages of convenient storage and transportation, good modification effect and extended service life. Effect

Inactive Publication Date: 2009-12-02
HUNAN UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For the liquid polymer cement modifier, its main defect is that it is inconvenient to store and transport, and the storage and transport efficiency is not high, because the solid content is only about 50%, the shelf life is short, only about 6 months, and additional preservatives, anti-corrosion agents, etc. need to be added. Toxic additives such as mold agents, these defects are especially obvious in environments with large temperature changes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment one, for waterproof leakage:

[0023] Add 1.5 parts of sodium sulfate, 0.8 parts of zinc stearate, 4.0 parts of sodium silicate, and 0.7 parts of sodium chloride into a pulverizer, mix and pulverize to 150 mesh. Then the above pulverized mixture, 90 parts of ethylene-vinyl acetate copolymer redispersible latex powder, 20 parts of silane modified polymer powder, 5 parts of methyl cellulose ether, 25 parts of quartz sand and 8 parts of fly ash were added to In the powder mixer, the silane-modified polymer powder is selected from BS Powder A produced by Weikai Polymer Co., Ltd. of Germany, and it is fully mixed to obtain a powder polymer cement modifier. The polymer cement modifier prepared by this formula not only can improve the flexural strength and compressive strength of cement products and parts, but also has a special effect on improving the waterproof and leakage properties of cement products and parts. Therefore, it can be used in tunnels , culverts, u...

Embodiment 2

[0024] Embodiment two, for increasing concrete strength:

[0025] Add 2 parts of sodium sulfate, 3 parts of sodium silicate, 1 part of zinc stearate, 0.5 parts of sodium chloride, and 3.5 parts of fumed silicon dioxide into the pulverizer, mix and pulverize to 120 mesh. Then add the above pulverized mixture, 100 parts of ethylene-vinyl acetate copolymer redispersible latex powder, 3 parts of methyl cellulose ether, 20 parts of quartz sand, and 5 parts of fly ash into the powder mixer, and mix well That is, the powder polymer cement modifier is obtained. The polymer cement modifier prepared by this formula is mainly used to improve the flexural strength, compressive strength and wear resistance of cement products and parts, so it is suitable for roads, airports, bridge decks, etc. For example, if 5% of the powder polymer cement modifier of the above formula is added to 52.5 grade Portland cement, the water content of the concrete is reduced by 11% compared with that without th...

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Abstract

This invention relates to a method for producing a powder high molecular cement modifier. The procedures comprise: according to weight ratio, mix the sodium sulfate 0.1-2.5 share, zinc stearate 0.1-2.0 share, sodium silicate 0.5-5.0 share, sodium chloride 0.5- 1.5 share, gas phase silicon dioxde 0-5.0 share and grind them to less than 100 order particles; and then mix this mixture with ethylene-vinyl acetate copolymer dispersible emulsion powder 50.0-100.0 share, arenaceous quartz 10.0-30.0 share, coal ash 0-15.0 share, methyl cellulose ether 0-10.0 share and silicane modified polymer powder 0-25.0 share. The modifier amount added is 1.5%- 10% of the cement weight used. Compared to the current liquid high molecular cement modifier, it has benefits of convenient transportation and better modification effect. Therefore, it can be broadly used in high-way cement road, airport, underground waterproof engineering, traffic culvert, ship port, hydraulic engineering and civilian construction, to enable the projects waterproof and leak resistance and extend the durability.

Description

technical field [0001] The invention belongs to a cement additive for polymer composite materials, namely a method for preparing a powder polymer cement modifier. Background technique [0002] The polymer cement modifier mixed into concrete and cement mortar can make the internal structure more compact and tough, so that the cement products and parts have water resistance, crack resistance, impact resistance, wear resistance, The physical and chemical properties such as acid and alkali resistance are significantly improved, and can effectively improve its construction performance, and it has the effects of accelerating coagulation and early strength. [0003] At present, there are two types of polymer cement modifier products, one is based on natural and natural modified polymers, such as rosin and lignosulfonate polymer cement modifier products, and the other is based on synthetic Polymer as the main material, such as ethylene-vinyl acetate copolymer polymer cement modifie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B14/06C04B18/08C04B24/24C04B24/38C04B24/08C04B22/12C04B22/14
CPCY02W30/91
Inventor 周诗彪周光明张维庆张儒祥
Owner HUNAN UNIV OF ARTS & SCI
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