CN110255981A - A kind of lightweight geopolymer plate and preparation method thereof - Google Patents

Abstract

The invention discloses a kind of lightweight geopolymer plate and preparation method thereof, the fly ash geopolymer plate of lightweight can be made using this method, and the plate has many advantages, such as that compression strength is high, stability is good, preparation process is simple, energy conservation and environmental protection.Lightweight geopolymer plate of the invention is formulated by 500 ~ 750 weight parts of fine coal ash, 300 ~ 750 parts by weight haydites, 400 ~ 750 parts by weight waterglass, preparation method is to demould the fly ash geopolymer slurry that haydite is added after 50 DEG C of maintenance 12h, then place it in steam-cured 60h in 50 DEG C of water bath with thermostatic control curing box.

Description

A kind of lightweight polymer board and preparation method thereof

technical field

The invention belongs to the technical field of building materials, and in particular relates to a light polymer plate and a preparation method thereof.

Background technique

Fly ash is one of the industrial wastes with a large amount of discharge in my country. If it is not treated, the long-term discharge and accumulation will cause environmental problems such as dust and water pollution. The utilization of fly ash as a resource not only solves the problems of waste stacking and environmental pollution for enterprises, but also effectively reduces the consumption of resources and energy in traditional cement production. Therefore, the preparation of new building materials with fly ash as raw material has great potential for development.

Geopolymer is an aluminosilicate gelling material formed by alkali-excited silicon-rich aluminum inorganic minerals, which belongs to a new type of green inorganic gelling material. The material has the advantages of high compressive strength, good corrosion resistance, fast strength development, etc., and has the advantages of abundant raw materials, simple preparation process, and low pollutant emission. It is a hot research topic in the material field at present.

The light-weight polymer sheet and its preparation method of the present invention use industrial waste slag-fly ash as the main raw material, supplemented with ceramsite and water glass to make a geopolymer sheet with excellent performance, which has light weight, high strength, high performance The advantages of stability, energy saving and environmental protection have broad application prospects.

Contents of the invention

The purpose of the present invention is to provide a light-weight polymer board and its preparation method, which can solve the resource and environmental problems caused by the production of cement-based light-weight board, and provide new ideas for the popularization and application of fly ash geopolymer materials.

The object of the present invention is achieved through the following technical solutions:

The light polymer plate of the present invention is prepared from 500-750 parts by weight of fly ash, 300-750 parts by weight of ceramsite, and 400-750 parts by weight of water glass.

The further technical proposal of the lightweight polymer board of the present invention is that the fly ash is Class I ash with an average particle size of 26.4 μm.

The further technical solution of the lightweight polymer board of the present invention is that the ceramsite is building ceramsite, the particle size is 3mm~6mm, and the bulk density is 510kg/m ³ .

The light weight polymer plate of the present invention, its further technical scheme is that described water glass is prepared by adding water to water glass with a modulus of 1.5, and the proportioning ratio of the two is as follows in parts by weight: water glass with a modulus of 1.5 70. Water 30; a further technical solution is that the water glass with a modulus of 1.5 is prepared by adding analytically pure sodium hydroxide to water glass with a modulus of 3.2.

The preparation method of the lightweight polymer plate of the present invention, its further technical scheme is that the described preparation steps are as follows:

Step 1. Take fly ash and ceramsite in proportion, and stir slowly for 30s with a mortar mixer to obtain a uniformly mixed material;

Step 2, take water glass in proportion, and quickly add it to the material obtained in step 1, stir it slowly for 1 minute with a mortar mixer, and then stir it quickly for 2 minutes to obtain a geopolymer slurry;

Step 3. Quickly inject the geopolymer slurry prepared in step 2 into the molding mold, and then demould after being cured at 50°C for 12 hours, and then place the demoulded geopolymer sheet in a constant temperature water bath curing box at 50°C to steam Raise for 60h.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The light polymer sheet of the present invention uses industrial solid waste - fly ash as the main raw material, realizes the resource utilization of industrial solid waste, and has positive environmental benefits.

(2) The raw materials used in the lightweight polymer sheet of the present invention do not contain cement, which avoids environmental pollution caused by cement production, and has the advantages of saving resources and protecting the environment.

(3) The raw materials used in the lightweight polymer sheet of the present invention are simple, which avoids the complexity of the production process caused by the use of multiple raw materials.

(4) The lightweight polymer sheet of the present invention has the characteristic of controllable curing rate, which can effectively improve production efficiency and reduce production cost.

(5) The lightweight polymer sheet of the present invention has the characteristics of excellent durability and corrosion resistance, and the development and application of this product can effectively improve the service performance and service life of the lightweight sheet.

(6) The preparation method of the lightweight polymer sheet of the present invention adopts the technical method of low-temperature steaming, which can further accelerate the progress of the solidification reaction of the geopolymer and improve the early mechanical properties of the material, which is not only beneficial to the improvement of production efficiency, but also Product yield can be improved.

Detailed ways

The present invention is illustrated below through specific examples, but the present invention is not limited to these examples.

Example 1

A light-weight polymer board is prepared from the following raw materials: 500g of fly ash, 300g of ceramsite, and 400g of water glass.

A kind of preparation method of light texture polymer board, it is prepared according to the steps of following order:

Step 1, the fly ash and ceramsite are stirred slowly for 30s by a mortar mixer to obtain a uniformly mixed material;

Step 2: Quickly add water glass to the material prepared in Step 1, stir slowly with a mortar mixer for 1 minute, and then stir quickly for 2 minutes to obtain a geopolymer slurry;

Step 3. Quickly inject the geopolymer slurry prepared in step 2 into the molding mold, and then demould after being cured at 50°C for 12 hours, and then place the demoulded geopolymer sheet in a constant temperature water bath curing box at 50°C to steam After cultivating for 60 hours, the performance results of the light weight polymer sheet are shown in Table 1.

Example 2

A light-weight polymer plate is prepared from the following raw materials: 500g of fly ash, 600g of ceramsite, and 550g of water glass.

A kind of preparation method of light texture polymer board, it is prepared according to the steps of following order:

Step 1, the fly ash and ceramsite are stirred slowly for 30s by a mortar mixer to obtain a uniformly mixed material;

Step 2: Quickly add water glass to the material prepared in Step 1, stir slowly with a mortar mixer for 1 minute, and then stir quickly for 2 minutes to obtain a geopolymer slurry;

Step 3. Quickly inject the geopolymer slurry prepared in step 2 into the molding mold, and then demould after being cured at 50°C for 12 hours, and then place the demoulded geopolymer sheet in a constant temperature water bath curing box at 50°C to steam After cultivating for 60 hours, the performance results of the light weight polymer sheet are shown in Table 1.

Example 3

A light-weight polymer plate is prepared from the following raw materials: 500g of fly ash, 750g of ceramsite, and 650g of water glass.

A kind of preparation method of light texture polymer board, it is prepared according to the steps of following order:

Step 1, the fly ash and ceramsite are stirred slowly for 30s by a mortar mixer to obtain a uniformly mixed material;

Step 2: Quickly add water glass to the material prepared in Step 1, stir slowly with a mortar mixer for 1 minute, and then stir quickly for 2 minutes to obtain a geopolymer slurry;

Step 3. Quickly inject the geopolymer slurry prepared in step 2 into the molding mold, and then demould after being cured at 50°C for 12 hours, and then place the demoulded geopolymer sheet in a constant temperature water bath curing box at 50°C to steam After cultivating for 60 hours, the performance results of the light weight polymer sheet are shown in Table 1.

Example 4

A light-weight polymer plate is prepared from the following raw materials: 600g of fly ash, 400g of ceramsite, and 500g of water glass.

A kind of preparation method of light texture polymer board, it is prepared according to the steps of following order:

Step 1, the fly ash and ceramsite are stirred slowly for 30s by a mortar mixer to obtain a uniformly mixed material;

Step 2: Quickly add water glass to the material prepared in Step 1, stir slowly with a mortar mixer for 1 minute, and then stir quickly for 2 minutes to obtain a geopolymer slurry;

Step 3. Quickly inject the geopolymer slurry prepared in step 2 into the molding mold, and then demould after being cured at 50°C for 12 hours, and then place the demoulded geopolymer sheet in a constant temperature water bath curing box at 50°C to steam After cultivating for 60 hours, the performance results of the light weight polymer sheet are shown in Table 1.

Example 5

A light-weight polymer plate is prepared from the following raw materials: 700g of fly ash, 500g of ceramsite, and 600g of water glass.

A kind of preparation method of light texture polymer board, it is prepared according to the steps of following order:

Step 1, the fly ash and ceramsite are stirred slowly for 30s by a mortar mixer to obtain a uniformly mixed material;

Step 2: Quickly add water glass to the material prepared in Step 1, stir slowly with a mortar mixer for 1 minute, and then stir quickly for 2 minutes to obtain a geopolymer slurry;

Step 3. Quickly inject the geopolymer slurry prepared in step 2 into the molding mold, and then demould after being cured at 50°C for 12 hours, and then place the demoulded geopolymer sheet in a constant temperature water bath curing box at 50°C to steam After cultivating for 60 hours, the performance results of the light weight polymer sheet are shown in Table 1.

Example 6

A light-weight polymer board is prepared from the following raw materials: 750g of fly ash, 750g of ceramsite, and 750g of water glass.

A kind of preparation method of light texture polymer board, it is prepared according to the steps of following order:

Step 1, the fly ash and ceramsite are stirred slowly for 30s by a mortar mixer to obtain a uniformly mixed material;

Step 2: Quickly add water glass to the material prepared in Step 1, stir slowly with a mortar mixer for 1 minute, and then stir quickly for 2 minutes to obtain a geopolymer slurry;

Step 3. Quickly inject the geopolymer slurry prepared in step 2 into the molding mold, and then demould after being cured at 50°C for 12 hours, and then place the demoulded geopolymer sheet in a constant temperature water bath curing box at 50°C to steam After cultivating for 60 hours, the performance results of the light weight polymer sheet are shown in Table 1.

Table 1 List of properties of lightweight polymer sheets

Example Dry density/(g cm^-3) Compressive strength (7 days)/MPa Example 1 1.23 19.1 Example 2 0.91 11.1 Example 3 0.85 5.7 Example 4 1.20 17.3 Example 5 1.16 16.1 Example 6 1.10 14.5

From the data in Table 1, it can be seen that using fly ash and ceramsite as raw materials, through the action of water glass, under the condition of low-temperature steam curing (50°C), light-weight and high-strength geopolymer boards can be prepared, which are suitable for walls. Body partition, interior decoration and other fields. At the same time, the application of the inventive technology can provide new ideas for resource utilization of fly ash, and also provide new materials and new technology support for the industrial application of fly ash geopolymers.

Claims (6)

1. a kind of lightweight geopolymer plate, it is characterised in that be formulated by the raw material of following parts by weight: flyash 500 ~ 750, haydite 300 ~ 750, waterglass 400 ~ 750.

2. lightweight geopolymer plate according to claim 1, it is characterised in that the flyash is I grade of ash, average Partial size is 26.4 μm.

3. lightweight geopolymer plate according to claim 1, it is characterised in that the haydite is building porcelain granule, partial size For 3mm~6mm, bulk density 510kg/m³。

4. lightweight geopolymer plate according to claim 1, it is characterised in that the waterglass is 1.5 by modulus Waterglass is formulated after adding water, and the two is as follows by weight ratio: waterglass 70, the water 30 of 1.5 moduluses.

5. lightweight geopolymer plate according to claim 4, it is characterised in that the modulus be 1.5 waterglass by The waterglass that modulus is 3.2 is added analysis pure cerium hydroxide sodium and modulates.

6. the preparation method of lightweight geopolymer plate described in a kind of claim 1-5 any one, it is characterised in that preparation step It is rapid as follows:

Step 1: weighing flyash and haydite in proportion, and 30s is mixed slowly with mortar mixer, obtains uniformly mixed object Material；

Step 2: weighing waterglass in proportion, and rapidly join in material made from step 1, is mixed slowly through mortar mixer Geopolymer slurry is made after then quickly stirring 2min again in 1min；

Step 3: geopolymer slurry made from step 2 is rapidly injected in molding die, demoulded after 50 DEG C of maintenance 12h, The geopolymer plate after demoulding is placed in steam-cured 60h in 50 DEG C of water bath with thermostatic control curing box again.