Environment-friendly glass fiber-magnesium cement board and preparation method thereof

A glass magnesium board, environmental protection technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of poor performance of fireproof boards such as waterproof, anti-halogenation, warping, etc., and achieve crystal structure Compactness, increased strength, and good freeze-thaw resistance

Inactive Publication Date: 2016-05-11
SCFM MATERIAL TECH SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an improved environment-friendly glass magnesium board and its preparation method, whi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0011] A preparation method of environmentally friendly glass magnesium board, characterized in that: the preparation method includes the following steps: a. Weighing 20-30% MgO and 20-30% MgCl by weight 2 , 0.1-0.5% composite water reducing agent, 30-55% fly ash, 1.2-2% activator, 6-10% wood chips and 6-10% perlite for use; b. Stir the above materials Mix, or add in batches and stir and mix in order, and finally make a slurry; c. Prepare the board by rolling the slurry; d. Curing the prepared board, curing for 1-2 days for demoulding, and then wet -Dry-wet-dry cycle maintenance.

[0012] In step a, weigh 22-25% MgO and 22-25% MgCl 2 , 0.2-0.3% composite water reducer, 30-55% fly ash, 1.2-2% activator, 8-10% sawdust and 8-10% perlite for use. In step a, use MgCl with a Baume degree of 24 2 The activator is produced by Nuoshengtai Institute of Innovation and Technology, and its product name is fly ash early active activator, and the composite water reducing agent used is produced ...

Example Embodiment

[0015] Example 1

[0016] Weigh 20% MgO and 20% MgCl 2 , 0.3% of composite water reducing agent, 40% of fly ash, 2% of activator, 8% of wood chips and 9.7% of perlite for use. Using Baume 24 MgCl 2 The activator is produced by Nuoshengtai Institute of Innovation and Technology, and its product name is fly ash early active activator, and the composite water reducing agent used is produced by Jinan Aiterun Building Materials Co., Ltd., and its product name is AD-M. Add water reducing agent to MgCl 2 Dissolve in the solution, then add MgO and stir evenly, then sequentially add sawdust and perlite, stir for 5 minutes, finally add fly ash and activator and stir evenly, and prepare the board by rolling the slurry. The prepared board is cured, cured for 1-2 days for demoulding, and then undergoes wet-dry-wet-dry cycle curing to help stimulate the reactivity of fly ash and other admixtures, and help increase the later strength and curing The process is dry and wet alternate curing. The ...

Example Embodiment

[0018] Example 2

[0019] Weigh 25% MgO and 25% MgCl 2 , 0.2% of composite water reducing agent, 31.8% of fly ash, 2% of activator, 8% of wood chips and 8% of perlite for use. Using Baume 24 MgCl 2 The activator is produced by Nuoshengtai Institute of Innovation and Technology, and its product name is fly ash early active activator, and the composite water reducing agent used is produced by Jinan Aiterun Building Materials Co., Ltd., and its product name is AD-M.

[0020] Put the raw materials together for stirring, the stirring time is 5 minutes, and prepare the board by rolling the above slurry. The prepared board is cured, cured for 1-2 days for demoulding, and then undergoes wet-dry-wet-dry cycle curing to facilitate the activation of fly ash. At the same time, in the gelling system of the present invention, the concept of a quaternary gelling system is proposed for the first time. In the case of a large amount of fly ash, SiO is formed 2 -MgO-MgCl 2 -H 2 O complex system, whi...

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PUM

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Abstract

The invention relates to an environment-friendly glass fiber-magnesium cement board and a preparation method thereof. The environment-friendly glass fiber-magnesium cement board comprises, by weight, 20 to 30% of MgO, 20 to 30% of MgCl2, 0.1 to 0.5% of a composite water reducer, 30 to 50% of fly ash, 1.2 to 2% of an exciting agent, 6 to 10% of wood chip and 6 to 10% of perlite. According to the invention, the water reducer and exciting agent are used in combination to excite activity of fly ash, so the strength of the whole board is improved, and in particular, later strength of the board is improved by nearly 20%; the concept of a four-component gelling system is provided for the first time, and the complex four-component gelling system SiO2-MgO-MgCl2-H2O exists in the process of hydration of magnesium cement; formation of novel crystal phases provides sufficient mechanical support; eventual addition of fly ash enables silicon-containing mine dregs to pose decisive influence on the strength of the fireproof board; disadvantages of original boards are overcome, an interior crystal structure is more compact, and the prepared board has the advantages of high strength, no overflowing of brine water, warping resistance, good resistance to freezing and thawing, etc.; and the preparation method is a green technology with development prospects.

Description

technical field [0001] The invention relates to the technical field of fireproof board preparation, in particular to a method for preparing a fireproof board by using a large amount of fly ash, in particular to an environmentally friendly glass magnesium board and a preparation method thereof. Background technique [0002] At present, in magnesia cementitious materials, there are very few examples of using fly ash in a large amount to prepare fireproof building materials. Improve some functions of the magnesium oxychloride fireproof board, such as improving the waterproof, anti-halogen, warping and other properties of the fireproof board. There is almost no large amount of fly ash above 30%, because the large amount of fly ash seriously affects the physical properties of the fireproof board without a suitable activator, so the large amount of fly ash has an important role in fire protection. Board utilization is a bottleneck. [0003] There have been examples of high-volum...

Claims

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Application Information

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IPC IPC(8): C04B28/32C04B18/08C04B18/26
CPCY02W30/91
Inventor 李占强
Owner SCFM MATERIAL TECH SHANGHAI
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