Nano cement paste

A nano-water and mud technology, applied in the field of nano-cement slurry, can solve problems such as hidden dangers of water conservancy or tunnel engineering, large strength attenuation, etc., and achieve the effect of improving penetration ability, improving late strength, and effectively blocking

Inactive Publication Date: 2015-09-23
ZHANGJIAGANG SHANMU NEW MATERIAL TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term observation shows that after adding alkaline accelerator, although the diffusion range of the slurry and the initial strength of cement stones are improved, the strength of cement stones decays greatly in the middle and late stages, and the decline rate exceeds 40% in severe cases. left a huge security risk

Method used

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  • Nano cement paste

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Comparison scheme
Effect test

Embodiment 1

[0019] A kind of nano cement slurry, the composition of the mass parts of described nano cement slurry is as follows: 40 parts of Portland cement, 12 parts of modified nano silicon dioxide, 10 parts of nano magnesium oxide, 0.08 part of retarder hydroxyethylidene diphosphonic acid , 0.8 parts of tributyl phosphate defoamer, 4 parts of soot, 0.8 parts of polypropylene fiber, 0.2 parts of glass fiber, 4 parts of anti-gas channeling agent, 2 parts of early strength agent.

[0020] Wherein, the mass parts composition of the anti-gas channeling agent is as follows: 6 parts of styrene-butadiene latex, 5 parts of carboxylated styrene-butadiene latex, 0.02 parts of AMPS-AM-AA polymer, 4 parts of nonylphenol polyoxyethylene ether, ethylene glycol 2 parts, 10 parts of water.

[0021] Wherein, the accelerator is selected from liquid silicon dioxide.

[0022] Wherein, the particle size of the liquid silicon dioxide is 20nm.

[0023] Wherein, the modified nano-silica is prepared by the f...

Embodiment 2

[0025] A kind of nano cement slurry, the composition of the mass parts of described nano cement slurry is as follows: Portland cement 45 parts, modified nano silicon dioxide 15 parts, nano magnesium oxide 12 parts, retarder hydroxyethylidene diphosphonic acid 0.12 parts 1.2 parts of defoaming agent tributyl phosphate, 6 parts of soot, 1.2 parts of polypropylene fiber, 0.4 part of glass fiber, 5 parts of anti-gas channeling agent, 3 parts of early strength agent.

[0026] Wherein, the mass parts composition of the anti-gas channeling agent is as follows: 7 parts of styrene-butadiene latex, 6 parts of carboxylated styrene-butadiene latex, 0.03 parts of AMPS-AM-AA polymer, 5 parts of nonylphenol polyoxyethylene ether, ethylene glycol 3 parts, 12 parts of water.

[0027] Wherein, the early strength agent is selected from liquid silicon dioxide and calcium formate.

[0028] Wherein, the particle size of the liquid silicon dioxide is 30nm.

[0029] Wherein, the modified nano-silic...

Embodiment 3

[0031] A kind of nano cement slurry, the composition of the mass parts of described nano cement slurry is as follows: 50 parts of portland cement, 20 parts of modified nano silicon dioxide, 14 parts of nano magnesium oxide, 0.16 part of retarder hydroxyethylidene diphosphonic acid 1.5 parts of defoaming agent tributyl phosphate, 8 parts of soot, 1.6 parts of polypropylene fiber, 0.5 parts of glass fiber, 6 parts of anti-gas channeling agent, 4 parts of early strength agent.

[0032] Wherein, the mass parts composition of the anti-gas channeling agent is as follows: 8 parts of styrene-butadiene latex, 6.8 parts of carboxylated styrene-butadiene latex, 0.05 parts of AMPS-AM-AA polymer, 6 parts of nonylphenol polyoxyethylene ether, ethylene glycol 5 parts, 15 parts of water.

[0033] Wherein, the accelerator is selected from liquid silicon dioxide.

[0034] Wherein, the particle size of the liquid silicon dioxide is 40nm.

[0035] Wherein, the modified nano-silica is prepared b...

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Abstract

The invention relates to the technical field of building materials, in particular to nano cement paste. The nano cement paste comprises, by mass, 40-60 parts of portland cement, 12-28 parts of modified nano-silica, 10-18 parts of nano-magnesia, 0.08-0.24 part of retarder etidronic acid, 0.8-1.8 parts of defoamer tributyl phosphate, 4-12 parts of soot, 0.8-2.4 parts of polypropylene fibers, 0.2-0.8 part of glass fibers, 4-8 parts of gas channeling inhibitor and 2-6 parts of early strength agent. The thickening time and the coagulation time of the nano cement paste can meet the construction safety requirement of squeezing cement in a deep well; by the adoption of the nano cement paste, the penetrability of nano cement is improved, and effective blocking of a deep stratum is achieved. According to the nano cement paste, hydrophilic group nanomaterials are introduced for preparing the cement paste, the liquid rheology characteristic of the cement paste is improved by means of the modification function of cement paste by the nanomaterials, and the strength at the middle stage and later stage of the cement paste is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a nanometer cement slurry. Background technique [0002] At present, cement slurry generally has higher stone body strength, better durability, abundant material sources, convenient slurry preparation, simple operation, and low cost, but the gelation time is long and the diffusion is not easy to control. Chemical slurry has good fluidity, low slurry viscosity, controllable gel, good impermeability and durability, and can be injected into fine cracks, but general chemical slurry is toxic and expensive, and its strength is relatively low. In order to shorten the gel time of cement slurry, accelerators are often used to control the gel time of cement slurry. At present, commonly used quick-setting agents such as water glass are mostly alkaline or weakly alkaline. After adding the quick-setting agent, the setting time of the cement slurry can be controlled from tens of se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/06C04B14/30
Inventor 范佳晨赵云龙徐丹徐凯徐再赵维达
Owner ZHANGJIAGANG SHANMU NEW MATERIAL TECH DEV
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