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A composite lightweight ceramic ecological building material with humidity control function and preparation method thereof

A lightweight ceramic and functional technology, applied in the field of building materials, can solve the problems of reducing the moisture absorption rate and saturated moisture absorption, unstable powder structure, destroying the microporous structure, etc., to reduce damage, reduce the use of precious resources, absorb The effect of moisture release and quick response

Inactive Publication Date: 2015-09-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high-temperature firing will destroy the microporous structure in the raw material, reduce the moisture absorption speed and saturated moisture absorption
For powder humidity control materials, although inorganic salt modification can increase its moisture absorption sensitivity, due to the unstable powder structure, the inorganic salt after moisture absorption and hydration is not easy to stay in the powder structure, which will cause secondary pollution

Method used

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  • A composite lightweight ceramic ecological building material with humidity control function and preparation method thereof
  • A composite lightweight ceramic ecological building material with humidity control function and preparation method thereof
  • A composite lightweight ceramic ecological building material with humidity control function and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Diatomaceous earth, Yonghe mud, Zhongshan mud, washed mud, Zhuhai mud, potassium sodium sand, quartz sand, talc sand, limestone, and polyacrylamide are in a mass ratio of 40:5:5:2:3:10:10: 5:15:5 Weigh the material, mix evenly, add 0.5% sodium tripolyphosphate and 0.5% sodium lignosulfonate in total mass, material: ball: water according to 1:1:0.6 ball mill for 24 hours, the mud after ball milling is removed The iron is then passed through a million-hole sieve, with 2% remaining in the sieve, sprayed and granulated, and 10% of the total weight of the powder is added to the starch that has passed through a 200-mesh sieve, and mixed evenly with a high-speed jet mill. The mixed powder is stale for 24 hours, and then pressed into shape , the molding pressure is 16MPa, fired at 850°C, kept for 20min, after firing, spray 5% CaCl 2 Determination of its moisture absorption and release properties. figure 1 For the x-ray diffraction pattern of this embodiment, from figure 1 It ...

Embodiment 2

[0028] The diatomite, Yonghe mud, Zhongshan mud, washed mud, Zhuhai mud, potassium sodium sand, quartz sand, talc sand, limestone, and sodium polyacrylate are in a mass ratio of 10:5:5:7:3:30:10: 5:20:5 Weigh the material, mix evenly, add 0.5% sodium tripolyphosphate and 0.5% sodium lignosulfonate by total mass, material: ball: water according to 1:1:0.6 ball mill for 24 hours, the mud after ball milling is removed The iron is then passed through a multi-hole sieve, and the remaining 2% is sieved, sprayed and granulated, and 5% of the total weight of the powder is added to the wood chips passed through a 250-mesh sieve, and mixed evenly with a high-speed jet mill. The mixed powder is stale for 24 hours, and then pressed into shape , with a molding pressure of 20MPa, fired at 900°C, and kept for 30 minutes to measure its moisture absorption and desorption properties. Figure 4 It is the moisture absorption and release curve of this embodiment.

Embodiment 3

[0030]Diatomaceous earth, Yonghe mud, Zhongshan mud, washed mud, Zhuhai mud, potassium sodium sand, quartz sand, talc sand, limestone, and polyacrylamide are in a mass ratio of 30:7:3:5:5:20:10: 4:14:2 Weigh the material, mix evenly, add 0.5% sodium tripolyphosphate and 0.5% sodium lignosulfonate in total mass, material: ball: water according to 1:1:0.6 ball mill for 24 hours, the mud after ball milling is removed The iron is then passed through a million-hole sieve, with 2% remaining in the sieve, sprayed and granulated, and 5% of the total weight of the powder is added to the coal cinder passed through a 250-mesh sieve, and mixed evenly with a high-speed jet mill. The mixed powder is stale for 24 hours, and then pressed into shape , the molding pressure is 20MPa, fired at 950°C, and kept for 30 minutes, and its moisture absorption and desorption properties are measured. Figure 5 It is the moisture absorption and release curve of this embodiment.

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Abstract

The invention discloses a composite light weight ceramic ecological building material with a humidifying function and a preparation method thereof. The composite light weight ceramic ecological building material is prepared from the following raw materials in percentage by weight: 10-50% of diatomite, 10-30% of clays, 10-25% of potassium sodium sands, 5-35% of quartz sands, 1-10% of talc sands, 1-5% of water soluble pore forming substance, 5-25% of solid pore forming substance and 15-25% of limestones. The composite humidifying light weight building material with a hierarchical porous structure can be prepared by the following steps: mixing the raw materials; ball-milling; granulating; forming; drying; sintering at a low temperature; and compounding 1-5% of CaCl2. The light weight humidifying building material is high in saturated wet compacted weight and rapid in moisture absorption and liberation response, and use of precious resources such as diatomite are greatly reduced and the production cost is lowered. The material has the functions of adjusting the indoor air humidity, preventing mildew and alleviating the load of a wall structure, saving energy resources and improving the living environment of human.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing a composite lightweight ceramic ecological building material with a humidity-regulating function. Background technique [0002] Relative air humidity is an important parameter to measure the comfort of the indoor environment, and it is of great significance to human health, air quality and object preservation. Currently commonly used humidity control means include humidifiers or humidity control materials. The humidity control materials are mainly divided into the following categories: one is to use diatomite, zeolite, sepiolite, gypsum and other natural porous materials as humidity control materials alone; the other is polymer water-absorbing resin; the other is salt Humidity-conditioning material. Among them, humidification equipment needs to consume a large amount of electric energy; and the use of a certain mineral raw material alone to pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/06C04B41/85
Inventor 李治程小苏曾令可王慧刘平安
Owner SOUTH CHINA UNIV OF TECH