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Silanization processing method of silicon powder and high damping concrete containing silanized silicon powder

A technology of silanization treatment and silanization of silicon powder, which is applied in the field of silanization treatment of silicon powder and high damping concrete containing silanization silicon powder, which can solve the problems of low damping capacity and increase impermeability and compactness Effect

Inactive Publication Date: 2010-09-22
刘铁军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low damping capacity of existing concrete structural materials, and provide a silanization treatment method of silicon fume and high damping concrete containing silanized silicon powder

Method used

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  • Silanization processing method of silicon powder and high damping concrete containing silanized silicon powder
  • Silanization processing method of silicon powder and high damping concrete containing silanized silicon powder
  • Silanization processing method of silicon powder and high damping concrete containing silanized silicon powder

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specific Embodiment approach 1

[0020] Specific embodiment 1: The silanization treatment method of silicon powder in this embodiment is as follows: 1. Place the silicon powder in a desiccator to constant dryness; 2. Immerse the silicon powder processed in step one to a mass concentration of 0.6%, In KH 550 silane coupling agent solution at 80℃ for 1h, then filter and dry; 3. Dry the silicon powder treated in step 2 at 105℃ for 12h, and then dry to constant weight to obtain silanized silicon powder.

[0021] The mechanism of action of the silane coupling agent in this embodiment is as follows:

[0022] The chemical formula of silane coupling agent is RSiX 3 , Where R is an organic group and X is a hydrolyzable group.

[0023] First, when the silicon powder is immersed in the KH 550 silane coupling agent solution, the silane coupling agent is wrapped on the surface of the silicon powder, mainly for physical adsorption.

[0024] Secondly, the X group in the silane coupling agent is hydrolyzed to form silanol, the reac...

specific Embodiment approach 2

[0034] Specific embodiment two: the high damping concrete containing silanized silicon powder per cubic meter in this embodiment is highly efficient from 480kg cement, 28.8kg of silanized silicon powder prepared in embodiment one, 200kg water, 638kg sand, 1042kg stones and 2.4kg FDN Composition of water reducing agent.

[0035] The high damping concrete containing silanized silicon powder in this embodiment is made by mixing the components of the high damping concrete containing silanized silicon powder.

[0036] The cement used in this embodiment is 32.5 ordinary Portland cement, the basic physical and mechanical properties of 32.5 ordinary Portland cement are shown in Table 2, and the chemical composition (%) of 32.5 ordinary Portland cement is shown in Table 3.

[0037] Table 2

[0038]

[0039] table 3

[0040]

[0041] The sand used in this embodiment is medium sand, and the grain gradation of medium sand is zone II gradation. The performance indexes of sand are shown in Table 4: ...

specific Embodiment approach 3

[0047] Specific implementation mode 3: In this embodiment, 9 concrete beams are prepared according to the ratio in Table 6, and the size of the specimen is 60×60×900mm 3 , Each test piece is 0.06×0.006×0.9=0.00324m 3 , That is, each test piece is 3.24 liters. We make 4 liters according to the ratio. P in Table 6 stands for benchmark concrete, SF stands for benchmark concrete mixed with unmodified silica fume, and GSF stands for specific embodiment two containing silanized silica fume High damping concrete.

[0048] Table 6

[0049]

[0050] Three kinds of concrete beams prepared according to the proportions in Table 6 were respectively tested with a three-point bending beam type large-size material damping test device:

[0051] The cross-sectional dimension of the three-point bending beam is 60mm×60mm×900mm. Input the sinusoidal excitation signal, obtain the displacement response of the sample from the data acquisition system, use MATLAB programming to obtain the phase difference be...

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Abstract

The invention discloses a silanization processing method of silicon powder and a high damping concrete containing silanized silicon powder, relating to a method for processing silicon powder and a concrete containing the silicon powder. The invention solves the problem that traditional concrete structural materials have low damping capacity. The silanization processing method of silicon powder comprises the following steps: immersing constantly dried silicon powder in KH 550 silane coupling agent water solution with the temperature of 80 DEG C for 1h, and then filtering, airing, and drying to constant weight to obtain the silanized silicon powder; each cubic meter of the high damping concrete containing the silanized silicon powder is made of 480 kg of cement, 28.8 kg of silanized silicon powder, 200 kg of water, 638 kg of sand, 1042 kg of stones and 2.4 kg of FDN efficient water reducer. By adding the silanized silicon powder into common concrete materials, the invention improves the damping performance of the concrete material and structure, thereby realizing the aim of improving self-shock resistance of the structure without a control device.

Description

Technical field [0001] The invention relates to a method for processing silicon powder and concrete containing the silicon powder. Background technique [0002] At present, concrete structures are developing in the direction of height, size, length, light weight and high strength. The damping of the concrete structure itself is obviously reduced, and the dynamic effect under the action of wind and earthquake is more serious. The concrete structure vibration control developed in the past 30 years, especially the energy-consuming vibration reduction technology, can effectively reduce the vibration of the concrete structure caused by wind, earthquake and sea waves. These technologies mainly increase the damping of the structure by installing various mechanical or hydraulic devices in the concrete structure to achieve the purpose of vibration reduction. [0003] Composite materials are widely used in structures due to their high strength and rigidity. Damping in structures is usually...

Claims

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Application Information

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IPC IPC(8): C04B22/02
Inventor 刘铁军隋莉莉邹笃建
Owner 刘铁军
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