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Nano aluminum oxide modified ultra-light cement-based composite material as well as preparation method and application thereof

A technology of nano-alumina and composite materials, which is applied in the field of nano-alumina modified ultra-light cement-based composite materials and its preparation, and can solve problems such as poor contact between raw materials and cement slurry matrix, affecting the mechanical properties of materials, and affecting compactness, etc. , to achieve the effects of dense hydration products, improving mechanical properties, and accelerating the hydration process

Pending Publication Date: 2021-11-02
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The nano-alumina modified ultra-light cement-based composite material and its preparation method provided by the present invention are mainly used to solve the problem of the large number of porous layers in the current common ultra-light cement-based composite material due to the large amount of residual air. , affecting its compactness, leading to poor contact or weakening of the bond between other raw materials and the cement slurry matrix, seriously affecting the mechanical properties of the material

Method used

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  • Nano aluminum oxide modified ultra-light cement-based composite material as well as preparation method and application thereof
  • Nano aluminum oxide modified ultra-light cement-based composite material as well as preparation method and application thereof
  • Nano aluminum oxide modified ultra-light cement-based composite material as well as preparation method and application thereof

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Effect test

Embodiment 1

[0047] A nano-alumina modified ultra-light cement-based composite material, comprising the following components in parts by weight: 836 parts of cement, 73 parts of micro-silica fume, 348 parts of hollow microspheres, 8.36 parts of nano-alumina, and 39 parts of steel fiber Parts, 13 parts of water reducing agent, 14 parts of shrinkage reducing agent, 245 parts of water.

[0048] Such as figure 1 As shown, the preparation method of the nano-alumina modified ultra-light cement-based composite material comprises the following steps:

[0049] S1. Weigh 836kg of cement, 73kg of microsilica fume and 348kg of hollow microspheres, pour them into a forced mixer, stir for 3 minutes at a speed of 48rpm / min and mix evenly to obtain a dry mix;

[0050] S2. Weigh 13kg of water reducer and 8.36kg of nano-alumina, add 183.75kg of water to the water-reducer, and after uniform dispersion, add nano-alumina to the diluted water-reducer, and after uniform dispersion, Then add the mixture of nano...

Embodiment 2

[0055] A nano-alumina modified ultra-light cement-based composite material, comprising the following components in parts by weight: 836 parts of cement, 73 parts of micro-silica fume, 348 parts of hollow microspheres, 25.08 parts of nano-alumina, and 39 parts of steel fiber Parts, 13 parts of water reducing agent, 14 parts of shrinkage reducing agent, 245 parts of water.

[0056] Such as figure 1 As shown, the preparation method of the nano-alumina modified ultra-light cement-based composite material comprises the following steps:

[0057] S1. Weigh 836kg of cement, 73kg of microsilica fume and 348kg of hollow microspheres, pour them into a forced mixer, stir for 3 minutes at a speed of 48rpm / min and mix evenly to obtain a dry mix;

[0058] S2. Weigh 13kg of water reducer and 25.08kg of nano-alumina, add 183.75kg of water to the water reducer, and after uniform dispersion, add nano-alumina to the diluted water reducer, and after uniform dispersion, Then add the mixture of na...

Embodiment 3

[0063] A nano-alumina modified ultra-light cement-based composite material, comprising the following components in parts by weight: 836 parts of cement, 73 parts of micro-silica fume, 348 parts of hollow microspheres, 8.36 parts of nano-alumina, and 35 parts of steel fiber Parts, 15 parts of water reducing agent, 12 parts of shrinkage reducing agent, 273 parts of water.

[0064] Such as figure 1 As shown, the preparation method of the nano-alumina modified ultra-light cement-based composite material comprises the following steps:

[0065] S1. Weigh 836kg of cement, 73kg of microsilica fume and 348kg of hollow microspheres, pour them into a forced mixer, stir for 5 minutes at a speed of 48rpm / min and mix evenly to obtain a dry mix;

[0066] S2. Weigh 15kg of water reducer and 8.36kg of nano-alumina, add 204.75kg of water to the water reducer, and after uniform dispersion, add nano-alumina to the diluted water reducer, and after uniform dispersion, Then add the mixture of nano...

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Abstract

The invention relates to the technical field of building materials, and discloses a nano aluminum oxide modified ultra-light cement-based composite material and a preparation method and application thereof. The nano aluminum oxide modified ultra-light cement-based composite material is prepared from, by weight, 836 parts of cement and 73 parts of silica fume; 348 parts of hollow microspheres; 8.36 to 25.08 parts of nano aluminum oxide; 35 to 39 parts of steel fiber; 13 to 15 parts of a water reducing agent; 12-14 parts of a shrinkage reducing agent; and 245 to 273 parts of water. The nano aluminum oxide modified ultra-light cement-based composite material is wide in raw material source, reasonable in dosage ratio and good in feasibility of the preparation method, and the prepared nanometer aluminum oxide modified ultra-light cement-based composite material product is light in weight, high in strength, good in mechanical property and excellent in durability by adding nanometer aluminum oxide for modification. The nano aluminum oxide modified ultra-light cement-based composite material can be used for preparing ULCC plates by combining with GFRP ribs, and has the potential to become an important material for super high-rise buildings or large-span members.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a nano-alumina modified ultra-light cement-based composite material and a preparation method and application thereof. Background technique [0002] Concrete is the most used building material today. However, concrete has disadvantages such as heavy weight, high brittleness, low tensile strength, and poor toughness, which largely affect and limit its application range. At present, modern building structures are gradually developing towards long-span and super high-rise buildings, and civil engineering is gradually expanding underground and into the ocean, which means that the performance requirements of concrete are increasing. Maintain its mechanical properties even better. At the same time, with the vigorous promotion of prefabricated buildings in recent years, the use of lightweight and high-strength materials to prepare prefabricated building components can greatly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/00C04B14/30C04B14/02E04C2/06E04C5/07
CPCC04B28/04C04B14/303C04B14/02C04B20/008E04C2/06E04C5/07C04B2201/50C04B18/146C04B14/48C04B2103/302C04B2103/0068
Inventor 谢建和蔡超俊何建华冯源麦子桦李江林袁兵
Owner GUANGDONG UNIV OF TECH
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