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A mixed crystal nano tio 2 Reinforced cement mortar and its preparation method

A cement mortar and mixed crystal technology, which is applied in the field of mixed crystal nano-TiO2 reinforced cement mortar and its preparation, can solve the problems of unsatisfactory performance of nano-TiO2 particle-reinforced composite mortar, and achieve the effect of improving performance

Active Publication Date: 2022-04-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, nano-TiO 2 Although it will not directly react with pozzolan on the cement matrix, its nano-scale particle size will have an important impact on the hydration hardening process of the cement matrix and the basic properties of the material
But nano TiO 2 The performance of particle reinforced composite mortar is not ideal, therefore, it is necessary to find ways to further improve the performance of composite mortar

Method used

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  • A mixed crystal nano tio <sub>2</sub> Reinforced cement mortar and its preparation method
  • A mixed crystal nano tio <sub>2</sub> Reinforced cement mortar and its preparation method
  • A mixed crystal nano tio <sub>2</sub> Reinforced cement mortar and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A polycrystalline mixed nano-TiO 2 Reinforced composite mortar, the composite mortar is prepared from the following raw materials: cement: 15%, standard sand: 65%, water: 17.98%, nano-TiO in mixed crystal form of anatase and rutile 2 (Anatase:rutile=4:1): 2%, sodium silicate: 0.02%.

[0022] Polycrystalline mixed nano-TiO described in this embodiment 2 The preparation method of the reinforced composite mortar specifically comprises the following steps:

[0023] (1) Nano-TiO 2 Preparation of the suspension: Mix 40g of anatase and rutile nano-TiO 2 Add it into 120g of water and stir at room temperature (below 30°C) for 20min, add 0.4g of sodium silicate dropwise during the stirring process, and then place it in an ultrasonic disperser for ultrasonic dispersion for 30min to obtain uniformly dispersed nano-TiO 2 suspension.

[0024] (2) Mixed crystal nano TiO 2 Preparation of high-strength and high-purification rate composite cement mortar: 300g cement, 1300g standard...

Embodiment 2

[0030] A polycrystalline mixed nano-TiO 2 Enhanced composite mortar, the composite mortar is prepared from the following raw materials: cement: 15%, standard sand: 65%, water: 18.98%, nano-TiO in the mixed crystal form of anatase and rutile 2 (Anatase: Rutile=1:1) 1%, sodium silicate 0.02%.

[0031] Polycrystalline mixed nano-TiO described in this embodiment 2 The preparation method of the reinforced composite mortar specifically comprises the following steps:

[0032] (1) Nano-TiO 2 Preparation of the suspension: mix 20g of anatase and rutile nano-TiO 2 Add it into 100g of water and stir at room temperature (below 30°C) for 20 minutes, add 0.4g of sodium silicate dropwise during the stirring process, and then place it in an ultrasonic disperser for ultrasonic dispersion for 40 minutes to obtain uniformly dispersed nano-TiO 2 suspension.

[0033] (2) Mixed crystal nano TiO 2 Preparation of high-strength and high-purification rate composite cement mortar: 300g cement, 130...

Embodiment 3

[0042] A polycrystalline mixed nano-TiO 2 Enhanced composite mortar, the composite mortar is prepared from the following raw materials: cement: 17%, standard sand: 60%, water: 24.5%, brookite, rutile mixed nano-TiO 2 (brookite:rutile=2:1) ​​8%, sodium silicate 0.5%.

[0043] Polycrystalline mixed nano-TiO described in this embodiment 2 The preparation method of the reinforced composite mortar specifically comprises the following steps:

[0044] (1) Nano-TiO 2 Preparation of suspension: mix 160g of anatase and brookite with nano-TiO 2 Add it into 490g of water and stir evenly at room temperature (below 30°C) for 45min, add 10g of sodium silicate dropwise during the stirring process, and then place it in an ultrasonic disperser for ultrasonic dispersion for 30min to obtain uniformly dispersed nano-TiO 2 suspension.

[0045] (2) Mixed crystal nano TiO 2 Preparation of high-strength and high-purification rate composite cement mortar: 340g of cement and 1200g of standard sand...

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Abstract

The invention discloses a mixed crystal nano TiO 2 The reinforced cement mortar and its preparation method belong to the technical field of building material preparation. The composite mortar is prepared from the following raw materials, and the raw materials and their mass percentages are: 10%-20% of cement, 55%-70% of standard sand, mixed crystal nano-TiO 2 1% to 10%, the addition of sodium silicate is 0.01 to 0.75%, water is 5 to 25%, and the sum of the mass percentages of all raw materials is 100%. Among them, sodium silicate is used as mixed crystal nano-TiO 2 the dispersant. The mixed crystal nano-TiO 2 It is composed of two or three of the three crystal forms of brookite, anatase and rutile; the present invention finds for the first time that two or three of the three crystal forms of brookite, anatase and rutile are combined in a certain proportion Adding the mixed crystals formed by mixing to cement mortar can significantly improve its mechanical properties and endow the cement mortar with the function of environmental purification.

Description

technical field [0001] The invention relates to a mixed crystal nano TiO 2 The reinforced cement mortar and its preparation method belong to the technical field of building material preparation. Background technique [0002] Cement mortar is a very important engineering material in the field of civil engineering. It is made by mixing sand with water in a certain proportion. With the rapid development of modern science and technology, people's requirements for the performance of cement mortar are increasing day by day. Traditional cement mortar has the disadvantages of low tensile strength, high brittleness, and single function, which has been difficult to meet the needs of modern production and life. Modern cement mortar needs to gradually develop towards high performance and multi-function. At present, the performance of cement mortar is improved by adding different nanoparticles including nano-SiO2 to Portland cement and sand as matrix materials. 2 , Nano TiO 2 And so ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B14/30
CPCC04B28/04C04B14/305C04B2201/50C04B14/06C04B22/002C04B12/04
Inventor 董祥孙亮张兰岑启宏赵焱
Owner KUNMING UNIV OF SCI & TECH
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