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

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...

Examples

preparation example Construction

[0011] A kind of preparation method of environment-friendly glass magnesium board, it is characterized in that: described preparation method comprises the following steps: a, weigh the MgO that is 20-30% by weight, the MgCl of 20-30% 2 , 0.1-0.5% composite water reducer, 30-55% fly ash, 1.2-2% activator, 6-10% wood chips and 6-10% perlite for later use; b. Stir the above materials Mix, or add in batches and mix in turn, and finally make a slurry; c, prepare the sheet by rolling the slurry; d, cure the prepared sheet, and remove the mold after curing for 1-2 days, and then wet - Dry-wet-dry cycle maintenance.

[0012] In the a step, the MgO, 22-25% MgCl of 22-25% by weight are weighed 2 , 0.2-0.3% composite water reducer, 30-55% fly ash, 1.2-2% activator, 8-10% wood chips and 8-10% perlite for later use. In the a step, adopt the MgCl of Baume degree 24 2 , the activator is produced by Nuoshengtai Innovation Technology Research Institute, the product name is fly ash early act...

Embodiment 1

[0016] Weigh 20% MgO, 20% MgCl by weight 2 , 0.3% composite water reducer, 40% fly ash, 2% activator, 8% wood chips and 9.7% perlite for use. MgCl with Baume 24 2 , the activator is produced by Nuoshengtai Innovation Technology Research Institute, the product name is fly ash early activity activator, and the composite water reducing agent used is produced by Jinan Aiterun Building Materials Co., Ltd., product name AD-M. Add water reducer to MgCl 2 Dissolve in the solution, then add MgO and stir evenly, then add wood chips and perlite in turn, 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, demolded after curing for 1-2 days, and then wet-dry-wet-dry cycle curing is carried out to facilitate the stimulation of the reactivity of fly ash and other admixtures, which is beneficial to increase the later strength and maintain The process lies in alternating dry and wet curing. The wet ...

Embodiment 2

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

[0020] The raw materials are put together and stirred for 5 minutes, and the above slurry is rolled to prepare a board. The prepared boards are cured for 1-2 days for demoulding, and then wet-dry-wet-dry cycle curing is carried out, so as to stimulate the activity of fly ash. At the same time, in the gelling system of the present invention, the concept of the quaternary gelling system is proposed for the first time. In the case of a large amount of fly ash, SiO 2 -MgO-MgCl 2 -H 2 O complex system, which is different from previous crystal struc...

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...

Examples

preparation example Construction

[0011] A kind of preparation method of environment-friendly glass magnesium board, it is characterized in that: described preparation method comprises the following steps: a, weigh the MgO that is 20-30% by weight, the MgCl of 20-30% 2 , 0.1-0.5% composite water reducer, 30-55% fly ash, 1.2-2% activator, 6-10% wood chips and 6-10% perlite for later use; b. Stir the above materials Mix, or add in batches and mix in turn, and finally make a slurry; c, prepare the sheet by rolling the slurry; d, cure the prepared sheet, and remove the mold after curing for 1-2 days, and then wet - Dry-wet-dry cycle maintenance.

[0012] In the a step, the MgO, 22-25% MgCl of 22-25% by weight are weighed 2 , 0.2-0.3% composite water reducer, 30-55% fly ash, 1.2-2% activator, 8-10% wood chips and 8-10% perlite for later use. In the a step, adopt the MgCl of Baume degree 24 2 , the activator is produced by Nuoshengtai Innovation Technology Research Institute, the product name is fly ash early act...

Embodiment 1

[0016] Weigh 20% MgO, 20% MgCl by weight 2 , 0.3% composite water reducer, 40% fly ash, 2% activator, 8% wood chips and 9.7% perlite for use. MgCl with Baume 24 2 , the activator is produced by Nuoshengtai Innovation Technology Research Institute, the product name is fly ash early activity activator, and the composite water reducing agent used is produced by Jinan Aiterun Building Materials Co., Ltd., product name AD-M. Add water reducer to MgCl 2 Dissolve in the solution, then add MgO and stir evenly, then add wood chips and perlite in turn, 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, demolded after curing for 1-2 days, and then wet-dry-wet-dry cycle curing is carried out to facilitate the stimulation of the reactivity of fly ash and other admixtures, which is beneficial to increase the later strength and maintain The process lies in alternating dry and wet curing. The wet ...

Embodiment 2

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

[0020] The raw materials are put together and stirred for 5 minutes, and the above slurry is rolled to prepare a board. The prepared boards are cured for 1-2 days for demoulding, and then wet-dry-wet-dry cycle curing is carried out, so as to stimulate the activity of fly ash. At the same time, in the gelling system of the present invention, the concept of the quaternary gelling system is proposed for the first time. In the case of a large amount of fly ash, SiO 2 -MgO-MgCl 2 -H 2 O complex system, which is different from previous crystal struc...