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Cement-based grouting material for reinforcement and repair, its preparation method and application

A grouting material, cement-based technology, applied in the field of building materials, can solve the problems of organic grouting materials such as non-environmental protection, poor volume stability and durability, and not easy to disperse, so as to ensure volume stability and durability, and improve construction properties, increase the bond strength

Inactive Publication Date: 2015-10-28
BEIJING NEW VISION BUILDING CONSTR TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mainly manifested in: (1) poor fluidity, low early strength; (2) only expansion in the later stage, poor filling performance of grouting; (3) high shrinkage, poor volume stability and durability in the later stage; (4) high viscosity, not easy to disperse ; (5) Organic grouting materials are not environmentally friendly

Method used

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  • Cement-based grouting material for reinforcement and repair, its preparation method and application
  • Cement-based grouting material for reinforcement and repair, its preparation method and application
  • Cement-based grouting material for reinforcement and repair, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The distribution of each group is as follows:

[0041] Portland cement (Qinhuangdao Asano Cement Plant P·I, strength 42.5MPa, specific surface area 450cm 2 / g)

[0042] 300 copies,

[0043] The fineness is 200 parts of superfine fly ash of 1250 mesh,

[0044] heavy calcium 400 parts,

[0045] Polycarboxylate superplasticizer 5 parts,

[0046] Activated carbon 0.1 part,

[0047] 15 parts of calcium oxide expansion agent (model ZS of Zhengzhou Zhengsen New Materials Co., Ltd.),

[0048] Cellulose ether (Dow Chemical MKW4000PF, viscosity 400cps at 20°C) 0.1 parts,

[0049]Calcium formate (Shanghai Qiyi Chemical) 2 parts,

[0050] Organosiloxane defoamer (German munzing-chemie company P803) 1 part,

[0051] Dodecylphenol polyoxyethylene ether (Jiangsu Haian Chemical OP-15) 0.02 parts,

[0052] The above-mentioned components are put into a JS-500 mixer according to their mass parts, and continuously stirred and mixed fo...

Embodiment 2

[0057] The distribution of each group is as follows:

[0058] Ordinary Portland cement (Taihang Brand P·O42.5R of Handan Cement Factory) 200 parts,

[0059] Sulphoaluminate cement (Polar Bear brand 42.5 grade of Tangshan Polar Bear Cement Factory) 300 parts

[0060] 200 parts of superfine fly ash with a fineness of 1500 mesh,

[0061] Steel slag powder 300 parts

[0062] Polycarboxylate superplasticizer 6 parts,

[0063] Activated carbon 0.2 part,

[0064] Magnesium oxide expansion agent (Tianjin Baoming Co., Ltd.) 20 parts,

[0065] Starch ether (German munzing-chemie company 235) 0.2 parts,

[0066] Sodium silicate (Yongqing Juli Chemical Industry) 1 part,

[0067] Organosiloxane defoamer (Germany munzing-chemie company P801) 0.8 parts,

[0068] Nonylphenol polyoxyethylene ether (Jiangsu Haian Chemical SOP-20) 0.03 parts,

[0069] The above-mentioned components are put into a JS-500 mixer according to their mass parts, and continuously stirred and mixed for 5 to 10 m...

Embodiment 3

[0074] The distribution of each group is as follows:

[0075] Sulphoaluminate cement (Polar Bear brand 42.5 grade of Tangshan Polar Bear Cement Factory) 300 parts,

[0076] The fineness is 100 parts of superfine fly ash of 1500 mesh,

[0077] Fineness is 150 parts of superfine wollastonite powder of 1500 mesh,

[0078] Kaolin 400 parts,

[0079] 4 parts of melamine superplasticizer,

[0080] 0.5 parts of aluminum powder,

[0081] 7 parts of ettringite expansion agent (UEA of Tianjin Baoming Co., Ltd.),

[0082] Zeolite (Qingdao Jiade Filter Material Co., Ltd.) 8 parts

[0083] Xanthan gum (viscosity 800cps at 20°C) 0.1 part,

[0084] Lithium carbonate 2 parts,

[0085] Organosiloxane defoamer (German munzing-chemie company P801) 1.2 parts,

[0086] Nonylphenol polyoxyethylene ether (Jiangsu Haian Chemical SOP-20) 0.05 parts,

[0087] Put the above-mentioned components into JS-500 type mixer according to their mass parts, and continuously stir and mix for 5-10 minutes ...

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Abstract

The invention relates to a cement-based grouting material used for strengthening repairing as well as a preparation method and application thereof. The cement-based grouting material comprises the following components in parts by weight: 300-500 parts of cement, 200-300 parts of admixtures, 300-400 parts of fillers, 3-6 parts of water-reducing components, 0.1-1 part of plastic swelling component, 10-20 parts of hardened swelling components, 0.01-0.2 part of stable component, 1-4 parts of early strength components, 0.2-2 parts of defoaming components and 0.01-0.2 parts of emulsifying component. The cement-based grouting material disclosed by the invention has performance advantages such as higher injection-molding performance, initial fluidity not greater than 17s, impermeability not exceeding 1mm, wear resistance not exceeding 10cm<3> / cm<2>, compressive strength within 2 hours not lower than 5MPa, compressive strength within 1 day not lower than 30 MPa, and the like. The cement-based grouting material has composite swelling, the free swelling ratio within 3 hours is 0.02%-2% and grouting is full and dense; the viscosity is low, the volume stability is good and durability is good; the cement-based grouting material does not contain VOC (volatile organic compounds), and is environment-friendly.

Description

technical field [0001] The invention belongs to the technical application field of building materials, and relates to a cement-based grouting material suitable for reinforcement and repair, its preparation method and its application. The cement-based grouting material is suitable for shaft grouting in fields such as mines and coal mines, and can also be used in weathered zones, rock formation grouting reinforcement, and crack repair in concrete engineering. Background technique [0002] Water damage in mines, coal mines and other fields is one of the main disasters in safe production. Once the karst development of limestone in the lower part of the stratum in northern my country is affected by mining, serious mine water damage may occur, and the water inrush may range from hundreds of cubic meters per hour. Tens of thousands of cubic meters can easily cause serious safety accidents. Due to the negative hydrogeological conditions of the deep fractured rock mass, the existing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B28/06
Inventor 任恩平宋涛文于大第陈夙
Owner BEIJING NEW VISION BUILDING CONSTR TECH
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