Silicon coated nano-titania-doped cement-based composite material and preparation method thereof

A technology of titanium dioxide and composite materials, applied in the field of building materials, can solve the problems of large porosity and internal looseness of cement matrix, and achieve the effects of improving flexural strength, increasing strength and superior mechanical properties

Active Publication Date: 2016-12-07
DALIAN UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This is mainly because nano-titanium dioxide has template nucleation and filling functions, which can promote the hydration reaction of cement to a certain extent, but the cement matrix has its own defects such as large porosity and loose interior, resulting in the bonding interface of the cement matrix. have certain problems

Method used

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  • Silicon coated nano-titania-doped cement-based composite material and preparation method thereof
  • Silicon coated nano-titania-doped cement-based composite material and preparation method thereof
  • Silicon coated nano-titania-doped cement-based composite material and preparation method thereof

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Embodiment

[0063] A cement-based composite material containing silicon nano-titanium dioxide

[0064] Table 1 raw material weight ratio ratio

[0065]

[0066] Note: The calculation of the dosing amount of silicon-coated nano-titanium dioxide adopts the internal doping method.

[0067] S1. Weigh the substances described in Table 1, pour water, water reducer, and silicon-coated nano-titanium dioxide (not added to specimen 1) into the stirring pot, set the stirring speed to 140±5r / min, stir for 20s, and then put the silica fume Pour it into a stirring pot, set the stirring speed to 140±5r / min, stir for 60s, then add cement and fly ash into the stirring pot in turn, set the stirring speed to 140±5r / min, stir for 2min, then put Change the stirring speed to 285±10r / min, stir for 2min, and finally pour the sand into the stirring pot, set the stirring speed at 140±5r / min, after stirring for 1min, then change the stirring speed to 285±10r / min, and stir for 4min ;

[0068] S2, pour the mixt...

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Abstract

The invention discloses a silicon coated nano-titania-doped cement-based composite material. The silicon coated nano-titania-doped cement-based composite material contains cement, silicon coated nano-titania, silica fume, coal ash, sand, a water reducer and water. The invention further discloses a preparation method of the cement-based composite material. Experiment results show that the silicon coated nano-titania-doped cement-based composite material combines the advantages of titania and silicon dioxide and takes full advantage of the characteristics of toughening effects, filling effects, nucleation effects, volcanic ash effects and high strength and toughness of nano-titania and silicon dioxide, so that the rupture strength, compressive strength and durability of the silicon coated nano-titania-doped cement-based composite material are better that those of a silicon coated nano-titania-doped cement-based composite material. Besides, the silicon coated nano-titania-doped cement-based composite material further has electrical properties and can meet the requirements on multifunction and intelligence of structural materials in future.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a cement-based composite material containing silicon nano-titanium dioxide and a preparation method thereof. Background technique [0002] As one of the most important building materials today, cement-based materials have the advantages of high compressive strength, convenient use, low price, and simple production methods, making them widely used in civil and water conservancy projects. However, with the rapid development of modern society, the problems of cement materials such as heavy weight, low toughness, and single role can no longer meet the requirements of material performance in some special environments. At present, there is an urgent need for a structure with small dead weight, high strength, and high toughness. And a cement-based material with versatility. [0003] Nano-titanium dioxide has been proven to improve the strength, toughness and other mechanical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B22/06C04B111/94
CPCC04B20/1066C04B28/04C04B2111/94C04B22/06C04B18/146C04B18/08C04B14/06C04B2103/302
Inventor 韩宝国李祯张立娜欧进萍
Owner DALIAN UNIV OF TECH
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