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A kind of nanoscale cement preparation method

A kind of cement preparation, nano-scale technology, applied in the industrial production of nano-scale cement, in the field of nano-scale cement preparation, to achieve the effect of improving compressive strength and low gas permeability

Active Publication Date: 2015-09-09
重庆子易新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Micron ultra-fine cement is effective in sealing high-permeability and medium-permeability formations, but it cannot do anything for low-permeability formations with small voids

Method used

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  • A kind of nanoscale cement preparation method

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Effect test

Embodiment 1

[0021] A nano-scale cement preparation method provided by the present invention, the first step: control moisture: 1. Use ordinary or ultra-fine silicate, aluminate, phosphate, dental cement and other types of quick-drying cement available in the market A kind of cement or oil well cement is used as cement raw material, and it is dried in electric heating drying equipment for later use. Using the optimization method, it is selected to be dried at 120 degrees Celsius for 4 hours, and the water content is less than 3%, so as to ensure that the ball does not stick to the ball during impact.

[0022] 2. Prepare co-ground cement of composite high polymer or fiber: use one of the above-mentioned cements to dry in the same way, and the additive is polyacrylate (PAE); or polyvinyl ester (PVE); or polyvinyl ester (PVE); Vinylidene (PVDC); or ultra-high molecular weight polyethylene fiber, etc. The amount added to the cement is preferably 0.25%-2%; and the corresponding additive is...

Embodiment 2

[0034] This embodiment is basically similar to Example 1. Further implementation of the co-ground cement is described. The additive is selected as polypropylene fiber 100G and added to the dried Portland cement 5KG. The ratio of addition is 2%. The propylene fiber is loaded into a 12L type double-tube hanging spring liquid-cooled micro-nano ball mill, 2.5KG per can, 50G polypropylene fiber, 5KG steel balls, the ball-to-material ratio is about 2:1, and the ball hammer pulverization is carried out at 35°C , a total of 600 times per minute hammer mill, 8 hours after taking out. Separate the pellets. After sampling, use a vacuum packaging machine to seal the cement with a double-aluminum composite film and put it into storage. At the same time, the sample was measured by X-ray small-angle scattering method for particle distribution, average particle size and specific surface area. And detect the specific surface area and the strength, permeability and microstructure of ceme...

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Abstract

The invention discloses a method for preparing nanoscale cement. The method includes the following steps that firstly, moisture is controlled; secondly, ball hamming type ball milling grinding is conducted, wherein cement in the first step serves as raw materials, the ratio of grinding balls to the raw materials is 2 to 1, the grinding balls and the raw materials are placed into a hanging spring type double-barrel liquid cooling micro-nano ball mill grinding tank for high-energy ball hamming type sealed ball milling, and ball materials are separated and packaged through a 100-mesh screen. In the first step, two methods are adopted for controlling the moisture, firstly, cement needing to be prepared are selected and dried for 4 hours in a 120-DEG C electrothermal drying device; secondly, co-milling cement containing high polymers or fibers is prepared, additive is added to the cement, the added additive accounts for 0.25% to 2% of the cement, the cement is dehumidified for 6 hours in a sealed environment, and through the two methods, the moisture content of the cement is smaller than 3%. The method has the following advantages that the nanoscale cement can enter a hypotonic stratum with gaps with the diameter below the micrometer scale or concrete gaps; compressive strength is improved by 3 times; a microstructure with gas phase permeability lower than one or more times fundamentally changes.

Description

technical field [0001] The invention relates to the technical field of mechanical preparation of ultra-fine cement, and in particular provides a nano-scale cement preparation method, which is suitable for industrial production of nano-scale cement. Background technique [0002] Cement is a powdery hydraulic gelling material that can harden in air and water. It is widely used in various fields that human life depends on, such as construction, transportation, water conservancy, petroleum, electric power and national defense projects. , thus constituting the world's second largest product (by weight). [0003] With the development of ultra-fine crushing technology, the size of cement particles becomes smaller and smaller, which increases the permeability in micro-cracks and greatly expands the application range of cement grouting engineering method. Therefore, the research on various new functions of ultra-fine cement has become a hot spot in engineering circles and academic c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/52
Inventor 曲少忠
Owner 重庆子易新材料科技有限公司
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