Aminosilane-modified ecological nano cementing material and preparation method thereof

A technology of aminosilane and nanomaterials, which is applied in the field of building materials, can solve the problems such as the inability to disperse silica fume, and achieve the effect of improving dispersibility and microstructure

Active Publication Date: 2016-06-22
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the field of rubber industry, silane coupling agent plays an important role in the dispersant of nanomaterials. However, in the field of rubber materials, most of the matrix is ​​weakly acidic, while the matrix of cement materials is strongly alkaline. The polymerization state in the state is also completely different, therefore, it is impossible to disperse silica fume by deriving the method described in the patent CN102964881B

Method used

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  • Aminosilane-modified ecological nano cementing material and preparation method thereof
  • Aminosilane-modified ecological nano cementing material and preparation method thereof
  • Aminosilane-modified ecological nano cementing material and preparation method thereof

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Effect test

Embodiment 1

[0026] An aminosilane modified ecological nano-gelling material, by weight, the water-cement ratio is 0.15, other components except water and the mass percentage are as follows: cement is 35%, ecological nano-material is 3%, limestone powder 19.987%, high-quality Class I low-calcium fly ash is 40%, aminosilane modifier is 0.013%, and polycarboxylate superplasticizer is 2%.

[0027] Surface potential diagrams of silica fume particles before and after modification figure 1 As shown, the picture shows that the potential of the modified silica fume particles is converted into a positive potential; the microscopic morphology comparison of the silica fume particles before and after modification combined with the water reducer is shown in figure 2 As shown in the picture, the dispersibility of silica fume after modification is obviously improved.

Embodiment 2

[0029] An aminosilane modified ecological nano-gelling material, by weight, the water-cement ratio is 0.20, and the other components and mass percentages except water are as follows: 38.5% for cement, 5% for ecological nano-materials, limestone powder 17%, high-quality Class I low-calcium fly ash is 38%, aminosilane modifier is 0.017%, and high-efficiency water reducer is 1.483%.

Embodiment 3

[0031] An aminosilane modified ecological nano-gelling material, by weight, the water-cement ratio is 0.25, and the other components and mass percentages except water are as follows: 42% for cement, 11% for ecological nano-materials, limestone powder 14%, high-quality Class I low-calcium fly ash is 32%, aminosilane modifier is 0.024%, and high-efficiency water reducer is 0.976%.

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Abstract

The invention discloses an aminosilane-modified ecological nano cementing material and a preparation method thereof. According to the aminosilane-modified ecological nano cementing material, the ratio of water to ash is 0.15-0.35; except the water, the cementing material is prepared from the following raw materials in percentage by mass: 35%-55% of cement, 3%-11% of an ecological nano material, 10%-20% of limestone powder, 30%-40% of flyash, 0.013%-0.024% of an aminosilane modification agent and 0.2%-2% of a water reducer. The ecological nano material silicon powder is pre-dispersed, so that the dispersibility of the ecological nano material in a cement-based material is greatly improved; the micro-aggregate effect, the filling effect and the volcanic ash effect of the ecological nano material are more fully exerted; the properties such as microstructure, the physical and mechanical properties and the durability and the like of the cementing material are more effectively improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an aminosilane-modified ecological nano-gelling material and a preparation method thereof. Background technique [0002] Silica fume is an ecological nanomaterial with micro-nano particles, which has been widely used in the configuration and use of building materials such as cement concrete. Silica fume has a good pozzolanic effect and particle filling effect, which can significantly improve the microstructure of cement-based materials and improve their mechanical and durability properties. It is precisely because of the extremely high surface area and surface energy of silica fume that silica fume particles are easy to agglomerate in the natural state, resulting in the complete loss of many excellent characteristics of micro-nano silica fume, and the actual use effect is not good. Therefore, how to eliminate The agglomeration effect between silica fume particles has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/02
CPCC04B20/02C04B28/04C04B2111/00008C04B18/146C04B14/28C04B18/08C04B24/42C04B24/24C04B20/0016C04B20/0004
Inventor 郭丽萍雷东移
Owner SOUTHEAST UNIV
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