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A kind of cement mortar dry powder and its preparation method and application

A cement mortar and dry powder technology, which is applied in the field of cement mortar dry powder and its preparation, can solve problems such as the content requirements of calcium oxide active ingredients, defects in freeze-thaw resistance, corrosion of metal components, etc., and achieve controllable initial hardening time and good crack resistance. and freeze-thaw resistance, the effect of promoting the formation of crystals

Active Publication Date: 2019-09-17
辽宁兆利高新路面材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are defects in the anti-freezing and thawing performance, especially in Northeast China, after freezing and thawing in winter and summer, some parts of the wellhead will fall off; due to the large amount of calcium oxide, there will be efflorescence during application, which will cause corrosion to metal components ; There is cracking phenomenon in the application process of mortar; In addition, due to the high content of fast-hardening sulfoaluminate cement used, the required brand is also high, and the content of active components of calcium oxide used is also high (greater than 90%), so the cost higher

Method used

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  • A kind of cement mortar dry powder and its preparation method and application
  • A kind of cement mortar dry powder and its preparation method and application
  • A kind of cement mortar dry powder and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Under confirming that various raw materials and equipment dry state, take by weighing the active calcium oxide of 2.0kg (active calcium oxide mass content is 80%), the lignin amine (quaternary ammonium salt type) of 2.0kg, the amphoteric oxide of 5.0kg ( Al 2 o 3 ), 5.0kg of fiber (kapok fiber), add to 100.0kg of quartz sand and mix well; then add 10.0kg of U-shaped expansion agent (specific surface area is 2800cm 2 / g), 50.0kg of fly ash (particle size 0.05mm), 100.0kg of aluminate cement with a strength grade of 425, and 160.0kg of Portland cement with a strength grade of 525, mix well; finally add 566.0 kg of quartz sand, fully mixed, to obtain cement mortar dry powder A of the present invention, sealed packaging. See Table 1 for the ratio.

Embodiment 2

[0051] After confirming the dry state of various raw materials and equipment, weigh 4.0kg of activated calcium oxide (the mass content of activated calcium oxide is 72%), 10.0kg of ligninamine (tertiary amine type), 10.0kg of amphoteric oxide (ZnO ), 10.0kg of fiber (polyester fiber), add to 36.0kg of river sand and mix well; then add 30.0kg of U-shaped expansion agent (specific surface area is 3000cm 2 / g), 100.0kg of fly ash (particle size 0.04mm), 200.0kg of aluminate cement with strength grade of 325, 200.0kg of Portland cement with strength grade of 425, mix well; finally add 400kg The river sand is fully mixed uniformly to obtain dry cement mortar powder B of the present invention, which is sealed and packaged. See Table 1 for the ratio.

Embodiment 3

[0053] After confirming the dry state of various raw materials and equipment, weigh 3.0kg of active calcium oxide (active calcium oxide mass content is 75%), 6.0kg of ligninamine (polyamine type), 7.5kg of amphoteric oxide (TiO 2 ), 7.5kg of fiber (asbestos fiber), add to 51.0kg of sea sand and mix well; then add 20.0kg of U-shaped expansion agent (specific surface area is 2900cm 2 / g), 75.0kg of fly ash (particle size is 0.06mm), 150.0kg of aluminate cement with a strength grade of 525, and 180.0kg of Portland cement with a strength grade of 325, mix well; finally add 500kg The sea sand is fully mixed uniformly to obtain dry cement mortar powder C of the present invention, which is sealed and packaged. See Table 1 for the ratio.

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Abstract

The invention discloses cement mortar dry powder as well as a preparation method and application thereof. The cement mortar dry powder comprises fine sand, Portland cement, aluminate cement, coal ash, an expanding agent, fibers, amphoteric oxides, lignin amine and active calcium oxide. When being used, the cement mortar dry powder disclosed by the invention is uniformly mixed with water, and then cement mortar is made. The cement mortar dry powder disclosed by the invention has the characteristics of high early strength, controllability, no cracking, no whiskering and the like, in addition is low in preparation cost, and can not only meet management of sewer wells of city streets and rapid repairing of airfield runways, cement pavements, tunnels and the like, but also meet rapid construction requirements of back grouting of equipment foundation and reinforcement of foundation bolts.

Description

technical field [0001] The invention relates to a cement mortar dry powder and a preparation method thereof, in particular to a controllable quick-setting super early strength anti-cracking cement mortar dry powder and a preparation method thereof. The dry mortar powder is suitable for rapid treatment of sewer wells in urban streets, rapid repair of airports and cement pavements or bridge decks, secondary grouting of equipment foundations, reinforcement of anchor bolts, rapid construction or maintenance of tunnels or culverts, etc. Background technique [0002] Cement mortar or grouting material is mainly used in the fixing of corner bolts, machine base, steel structure and foundation interface, secondary grouting of equipment foundation, etc. Some projects require the cement mortar used to have the characteristics of rapid setting, rapid hardening, and early strength, especially for the fixing of corner bolts and the treatment of sewer wells. In order to speed up the constr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B111/70
Inventor 金晓铭
Owner 辽宁兆利高新路面材料有限公司
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