CN101549971B - Preparation method of quick-setting agent for magnesite cementitious material - Google Patents

Abstract

The invention discloses a preparation method of a magnesite cement material accelerator which consists of accelerating powder and accelerating liquid, wherein the accelerating powder consists of raw materials with following weight ratio: 40 portions to 70 portions of aluminum sulphate, 10 portions to 25 portions of tiny silicone powder and 15 portions to 35 portions of fly ash; the preparation method of the accelerating powder comprises the steps that the aluminum sulphate, the tiny silicone powder and the fly ash are taken according to the respective weight percentage, put into a bender, blended evenly, taken out of the blender and put into bags to obtain finished products; the accelerating liquid consists of raw materials with the following weight ratios: 30 portions to 60 portions of water, 10 portions to 35 portions of calcium chloride, 10 portions to 30 portions of ammonium nitrate and 2 portions to 15 portions of trolamine; the preparation method of the accelerating liquid comprises the steps that the water and the calcium chloride which are weighted according to the weight ratio are added into a reaction kettle and blended for 30 minutes to be dissolved, and then taken out of the reaction kettle and put into buckets to obtain finished products. The using method of the magnesite cement material accelerator comprises the steps of adding 1 portion to 3 portions of the accelerating powder and 1 portion to 3 portions of the accelerating liquid into 100 portions of evenly blended magnesite cement grout and then blending the mixture evenly, and eventually magnesite cement material accelerator is ready for use. The magnesite cement material accelerator is especially suitable for the production of craft wares and can effectively shorten the coagulation time of grout and significantly reduce the mold unloading time, thus improving production efficiency and lowering production cost.

Description

Preparation method of quick-setting agent for magnesite cementitious material

technical field

The invention relates to a preparation process of a quick-setting agent, in particular to a preparation method of a magnesite gelling material quick-setting agent.

Background technique

Magnesite cement is an air-hardening cementitious material. When using this material to manufacture products, it does not require moisture curing; when it is above 20°C, its strength increases rapidly, and its flexural and compressive strength are high; weak alkalinity, Low corrosion, high elasticity, good toughness, light weight; it has good bonding properties to organic and inorganic materials or fibers, and is widely used in construction, decoration, urban construction, agriculture and other fields. Magnesite craft products developed in recent years, such as flower pots, murals, reliefs, rockery, etc., have been favored by people at home and abroad because of their ornamental and decorative arts, green environmental protection, and low price. It has begun to replace The relatively expensive plexiglass resin has developed rapidly in the southern coastal areas of my country, such as Jiangsu, Zhejiang, Shanghai, Fujian, and Guangdong, and is gradually expanding to the northern areas. The products are exported to Europe, America, Southeast Asia and other countries and regions. Even so, since most of the handicraft products are special-shaped, non-standard, and complex-shaped products, there are many types of molds used, the demoulding time is long, and the mold turnover is slow. Therefore, when making handicraft products with this material, the production efficiency is reduced and increased. Mold manufacturing costs increase energy consumption.

Contents of the invention

The task of the present invention is to provide a kind of quick-setting agent for magnesite cementitious material that can effectively shorten the magnesite cement slurry setting time and shorten the product demoulding time under production conditions (low temperature, normal temperature, high temperature) in order to overcome the above-mentioned defects. Preparation.

The object of the present invention is achieved in the following manner, the quick-setting powder is made up of the raw materials of following weight ratio: 40-70 parts of aluminum sulfate, 10-25 parts of silicon micropowder, 15-35 parts of fly ash; The preparation steps are as follows: Measure aluminum sulfate, silicon micropowder and fly ash according to the percentage and add them to the mixer, stir evenly, take out and pack into bags to obtain the finished product;

The quick-setting water is composed of the following raw materials in the weight ratio: 30-60 parts of water, 10-35 parts of calcium chloride, 10-30 parts of ammonium nitrate, 2-15 parts of triethanolamine; the preparation steps are as follows: water, chloride After the calcium is measured, add it to the reaction kettle, stir for 30 minutes to dissolve it, then add the measured ammonium nitrate and continue stirring for 15 minutes until it dissolves, and finally add the measured triethanolamine, stir for 30 minutes, take it out and put it in a barrel to obtain the finished product;

How to use quick-setting agent: Add 1-3 parts of quick-setting powder and 1-3 parts of quick-setting water into 100 parts of magnesite cement slurry that has been stirred evenly, and stir evenly.

Compared with the prior art, the quick-setting agent prepared by the method of the present invention has the beneficial effect of adding quick-setting powder and quick-setting water in the magnesite cement slurry in a ratio of 1% and 1.5%, especially for molding In complicated process products, it can effectively shorten the setting time of slurry, greatly shorten the demoulding time of products, improve production efficiency, save energy and molds, and reduce production costs.

Magnesite products are light-burned magnesia that is calcined at a temperature of 800-850°C and finely ground by Raymond mills, magnesium chloride solution and fly ash with a specific gravity of 1.21-1.23g/ ^cm3 , It is composed of inorganic filler materials such as calcite powder and sand, and organic plant fibers such as rice husk powder and saw powder. When the quick-setting agent of the present invention is mixed in the magnesite slurry, it will react with the ^Mg in the slurry to generate a magnesium salt of organic polymer, thereby speeding up the reaction speed and shortening the Clotting time.

Detailed ways

Example 1

The quick-setting agent of the present invention is made up of quick-setting powder and quick-setting water two-component material, wherein:

The quick-setting powder is composed of the following raw materials in the weight ratio: 40 kg of aluminum sulfate, 10 kg of silica powder, and 15 kg of fly ash; the preparation steps are as follows: measure aluminum sulfate, silica powder, and fly ash according to the percentage and then add them to the mixture In the machine, stir evenly and take out the bag to be the finished product;

The quick-setting water is composed of the following raw materials in the weight ratio: 30 kg of water, 10 kg of calcium chloride, 10 kg of ammonium nitrate, and 2 kg of triethanolamine; the preparation steps are as follows: measure the water and calcium chloride and add them to the reaction kettle , stir for 30 minutes to make it melt, then add the measured ammonium nitrate and continue to stir for 15 minutes until it dissolves, finally add the measured triethanolamine, stir for 30 minutes, take it out and put it in a barrel to get the finished product;

How to use the quick-setting agent: Add 1 kg of quick-setting powder and 2 kg of quick-setting water into 100 kg of magnesite cement slurry that has been stirred evenly, and stir evenly.

Example 2

The quick-setting agent of the present invention is made up of quick-setting powder and quick-setting water two-component material, wherein:

The quick-setting powder is composed of the following raw materials in the weight ratio: 70 kg of aluminum sulfate, 25 kg of silicon powder, and 35 kg of fly ash; the preparation steps are as follows: measure aluminum sulfate, silicon powder, and fly ash according to the percentage and add them to the mixture In the machine, stir evenly and take out the bag to be the finished product;

Quick-setting water is composed of raw materials with the following weight ratio: 60 kg of water, 35 kg of calcium chloride, 30 kg of ammonium nitrate, and 15 kg of triethanolamine; the preparation steps are as follows: measure water and calcium chloride and add them to the reaction kettle , stir for 30 minutes to make it melt, then add the measured ammonium nitrate and continue to stir for 15 minutes until it dissolves, finally add the measured triethanolamine, stir for 30 minutes, take it out and put it in a barrel to get the finished product;

How to use the quick-setting agent: Add 2 kg of quick-setting powder and 2 kg of quick-setting water into 100 kg of magnesite cement slurry that has been stirred evenly, and stir evenly.

Example 3

The quick-setting agent of the present invention is made up of quick-setting powder and quick-setting water two-component material, wherein:

The quick-setting powder is composed of the following raw materials in the weight ratio: 55 kg of aluminum sulfate, 20 kg of silica powder, and 25 kg of fly ash; the preparation steps are as follows: measure aluminum sulfate, silica powder, and fly ash according to the percentage and add them to the mixture In the machine, stir evenly and take out the bag to be the finished product;

Quick-setting water is composed of raw materials with the following weight ratio: 50 kg of water, 22 kg of calcium chloride, 25 kg of ammonium nitrate, and 5 kg of triethanolamine; the preparation steps are as follows: measure water and calcium chloride and add them to the reaction kettle , stirred for 30 minutes to make it melt, then added the measured ammonium nitrate and continued to stir for 15 minutes until it melted, finally added the measured triethanolamine, stirred for 30 minutes, took it out and packed it into a barrel to obtain the finished product.

How to use the quick-setting agent: Add 2 kg of quick-setting powder and 3 kg of quick-setting water into 100 kg of magnesite cement slurry that has been stirred evenly, and stir evenly.

Example 4

The quick-setting agent of the present invention is made up of quick-setting powder and quick-setting water two-component material, wherein:

The quick-setting powder is composed of the following raw materials in the weight ratio: 50 kg of aluminum sulfate, 22 kg of silica powder, and 28 kg of fly ash; the preparation steps are as follows: measure aluminum sulfate, silica powder, and fly ash according to the percentage and add them to the mixture In the machine, stir evenly and take out the bag to be the finished product;

Quick-setting water is composed of raw materials with the following weight ratio: 55 kg of water, 25 kg of calcium chloride, 20 kg of ammonium nitrate, and 5 kg of triethanolamine; the preparation steps are as follows: measure water and calcium chloride and add them to the reaction kettle , stirred for 30 minutes to make it melt, then added the measured ammonium nitrate and continued to stir for 15 minutes until it melted, finally added the measured triethanolamine, stirred for 30 minutes, took it out and packed it into a barrel to obtain the finished product.

How to use the quick-setting agent: Add 3 kg of quick-setting powder and 3 kg of quick-setting water into 100 kg of magnesite cement slurry that has been stirred evenly, and stir evenly.

Example 5

The quick-setting agent of the present invention is made up of quick-setting powder and quick-setting water two-component material, wherein:

The quick-setting powder is composed of the following raw materials in the weight ratio: 55 kg of aluminum sulfate, 20 kg of silica powder, and 25 kg of fly ash; the preparation steps are as follows: measure aluminum sulfate, silica powder, and fly ash according to the percentage and add them to the mixture In the machine, stir evenly and take out the bag to be the finished product;

The quick-setting water is composed of the following raw materials in the weight ratio: 50 kg of water, 25 kg of calcium chloride, 20 kg of ammonium nitrate, and 5 kg of triethanolamine; the preparation steps are as follows: measure the water and calcium chloride and add them to the reaction kettle , stirred for 30 minutes to make it melt, then added the measured ammonium nitrate and continued to stir for 15 minutes until it melted, finally added the measured triethanolamine, stirred for 30 minutes, took it out and packed it into a barrel to obtain the finished product.

How to use the quick-setting agent: Add 3 kg of quick-setting powder and 2 kg of quick-setting water into 100 kg of magnesite cement slurry that has been stirred evenly, and stir evenly.

Embodiment 6:

The quick-setting agent of the present invention is made up of quick-setting powder and quick-setting water two-component material, wherein:

The weight proportion that each raw material of quick-setting agent accounts for is:

Quick-setting powder: 50 kg of aluminum sulfate, 20 kg of silicon micropowder, and 30 kg of fly ash.

Measure the aluminum sulfate, silicon micropowder and fly ash according to the percentage and add them into the mixer, and stir evenly.

Quick-setting water: 45 kg of water, 25 kg of calcium chloride, 15 kg of ammonium nitrate, and 15 kg of triethanolamine;

Measured water and calcium chloride were added to the reaction kettle, stirred for 30 minutes to dissolve, then added the measured ammonium nitrate and continued to stir for 15 minutes until dissolved, and finally added the measured triethanolamine, stirred for 30 minutes.

Use of quick-setting agent: Add 1 kg of quick-setting powder and 3 kg of quick-setting water into 100 kg of magnesite cement slurry that has been stirred evenly, and stir evenly.

Embodiment 7:

The quick-setting agent of the present invention is made up of quick-setting powder and quick-setting water two-component material, wherein:

Quick-setting powder: 55 kg of aluminum sulfate, 20 kg of silicon micropowder, and 25 kg of fly ash.

Measure the aluminum sulfate, silicon micropowder and fly ash according to the percentage and add them into the mixer, and stir evenly.

Quick-setting water: 45 kg of water, 20 kg of calcium chloride, 25 kg of ammonium nitrate, and 10 kg of triethanolamine;

Measured water and calcium chloride were added to the reaction kettle, stirred for 30 minutes to dissolve, then added the measured ammonium nitrate and continued to stir for 15 minutes until dissolved, and finally added the measured triethanolamine, stirred for 30 minutes.

Use of quick-setting agent: Add 2 kg of quick-setting powder and 2 kg of quick-setting water into 100 kg of magnesite cement slurry that has been stirred evenly, and stir evenly.

Embodiment 8:

The quick-setting agent of the present invention is made up of quick-setting powder and quick-setting water two-component material, wherein:

Quick-setting powder: 60 kg of aluminum sulfate, 20 kg of silicon micropowder, and 20 kg of fly ash.

Measure the aluminum sulfate, silicon micropowder and fly ash according to the percentage and add them into the mixer, and stir evenly.

Quick-setting water: 50 kg of water, 25 kg of calcium chloride, 20 kg of ammonium nitrate, 5 kg of triethanolamine;

Measured water and calcium chloride were added to the reaction kettle, stirred for 30 minutes to dissolve, then added the measured ammonium nitrate and continued to stir for 15 minutes until dissolved, and finally added the measured triethanolamine, stirred for 30 minutes.

Use of quick-setting agent: Add 1 kg of quick-setting powder and 1.5 kg of quick-setting water into 100 kg of magnesite cement slurry that has been stirred evenly, and stir evenly.

Test Results:

In the magnesite process product workshop, use the quick-setting agent of the present invention to produce flower pots, under different curing temperatures, the test result of the influence of the quick-setting agent on the setting time (min) of magnesite cement slurry proves that adding the quick-setting agent and not The addition of accelerator has a great influence on the setting time and directly affects the demoulding time.

The test results are as follows:

In February 2009, we used the quick-setting agent of the present invention in the magnesite craft product workshop. At that time, the temperature of the production workshop was about 10°C without any heating facilities. It can be demoulded within 1 hour, while it takes 7 to 8 hours for the flowerpot without accelerator to be demoulded;

In April 2009, the quick-setting agent of the present invention was used in the magnesite craft product workshop. The temperature in the workshop was about 22°C. After using the quick-setting agent, the magnesite flowerpot could be demoulded in 2.5 to 3 hours without adding the quick-setting agent. It takes 5 to 6 hours for the flowerpot of the coagulant to be demoulded.

The practical application of the quick-setting agent in production proves that the demoulding time can be shortened by more than 50% by using the quick-setting agent, the production efficiency is significantly improved, and energy and molds are saved.

Claims (2)

1. the preparation method of magnesite cementitious material quick-setting agent is characterized in that being made up of the material of quick-setting powder and quick-setting water two-component, wherein: The quick-setting powder is composed of the following raw materials in the weight ratio: 40-70 parts of aluminum sulfate, 10-25 parts of silicon powder, and 15-35 parts of fly ash; the preparation steps are as follows: aluminum sulfate, silicon powder, and fly ash are pressed After the percentage is measured, add it to the mixer, stir evenly, take it out and pack it into a bag to become the finished product; The quick-setting water is composed of the following raw materials in the weight ratio: 30-60 parts of water, 10-35 parts of calcium chloride, 10-30 parts of ammonium nitrate, 2-15 parts of triethanolamine; the preparation steps are as follows: water, chloride After the calcium is measured, add it to the reaction kettle, stir for 30 minutes to dissolve it, then add the measured ammonium nitrate and continue stirring for 15 minutes until it dissolves, and finally add the measured triethanolamine, stir for 30 minutes, take it out and put it in a barrel to obtain the finished product; How to use quick-setting agent: Add 1-3 parts of quick-setting powder and 1-3 parts of quick-setting water into 100 parts of magnesite cement slurry that has been stirred evenly, and stir evenly. 2. The method according to claim 1, characterized in that, consists of quick-setting powder and quick-setting water two-component material, wherein: The quick-setting powder is composed of the following raw materials in the weight ratio: 60 parts of aluminum sulfate, 20 parts of silicon micropowder, and 20 parts of fly ash; the preparation steps are as follows: measure aluminum sulfate, silicon micropowder and fly ash according to the percentage and add them to the mixture In the machine, stir evenly and take out the bag to be the finished product; The quick-setting water is composed of the following raw materials in the weight ratio: 50 parts of water, 25 parts of calcium chloride, 20 parts of ammonium nitrate, and 5 parts of triethanolamine; the preparation steps are as follows: measure water and calcium chloride and add them to the reaction kettle , stir for 30 minutes to make it melt, then add the measured ammonium nitrate and continue to stir for 15 minutes until it dissolves, finally add the measured triethanolamine, stir for 30 minutes, take it out and put it in a barrel to get the finished product; How to use the quick-setting agent: Add 1 part of quick-setting powder and 1.5 parts of quick-setting water into 100 parts of magnesite cement slurry that has been stirred evenly, and stir evenly.