Why do you need to add gypsum to the raw material when the aerated block production line is produced

Why is there gypsum in the raw materials of the gas block production line? Gypsum is a conditioning material. It plays an inhibiting role in the early stage of cement hydration to prevent false solidification of cement.

Inhibits lime digestion, prolongs its digestion time, and lowers its final digestion temperature. Participate in the gassing reaction of aluminum powder to produce calcium sulfoaluminate.

The aerated block production line equipment should be strictly controlled in the selection of raw materials. The raw materials in the aerated block production line are mainly fly ash (sand), white ash, cement, gypsum, etc. Gypsum plays an important role in raw materials, and the role of gypsum in the production of aerated block equipment is twofold.

In the autoclaved fly ash products, due to the participation of gypsum in the formation of hydration products, the addition of gypsum can significantly improve the strength, reduce shrinkage, and the carbon coefficient is also greatly improved. At the same time, during the pouring process, it has an obvious delaying effect on the digestion of lime, thereby slowing down the thickening rate of the slurry. Therefore, the amount of gypsum should not only be considered to improve the performance of the product, but also to control the process parameters.

For example, the water-to-material ratio of the slurry, the quality and amount of lime, etc., the general amount of gypsum is controlled within 5. Related questions can be answered by Deyi Heavy Industry or enter your questions, there will be many relevant professionals to answer for you, I hope my help to you.

The temperature of the lime is dissolved, the pouring is stable, and the strength is improved.

Aerated block is a kind of porous concrete, it is a lightweight porous new building material, aerated block equipment production of aerated block equipment has the advantages of bulk density pure round light, high thermal insulation efficiency, good sound absorption and processability, etc., can be made into wall blocks, insulation blocks, pressure panels, floor slabs, wall panels and insulation pipes and other products, aerated block production line aerated concrete soil has begun to be widely used in industrial and civil buildings in load-bearing or non-load-bearing structures and pipeline insulation in China, becoming an important part of new building materials.

Aerated concrete production requires the use of fly ash, sand, aluminum powder and other raw materials.

Generally, fly ash or sand is used as raw material for aeration.

It provides the main calcareous material for aerated concrete. Cement suitable for the production of fly ash aerated concrete should be mainly selected in two aspects: cement variety and label. In production, the first grade ordinary Portland cement should be selected.

In general, in order to reduce production costs, it is better to choose ordinary Portland cement.

3.Lime: Lime is also one of the main raw materials for the production of fly ash aerated concrete, and its main role is to provide effective calcium oxide in combination with cement, so that it can interact with SiO2 and Al2O3 in siliceous materials under hydrothermal conditions to produce hydrated calcium silicate.

Therefore, lime is one of the main strengths** of this product. The available calcium oxide content of lime used for the production of aerated concrete should be greater than 65%, preferably greater than 80%. It should comply with the (JC T621-1996) standard.

4.Gypsum: Gypsum is in fly ash aerated concrete and is a regulator of the gassing process.

The regulating effect of gypsum is mainly reflected in the delay of quicklime digestion and slurry thickening. The main chemical component of gypsum is caso4. There are three types of gypsum on the market:

Raw plaster, anhydrite, and cooked plaster. In addition, waste gypsum is also generated in the chemical production process. For example, phosphogypsum discharged from the production of phosphate fertilizers, fluorine gypsum discharged from the production of fluorine chemicals, titanium dioxide produced and discharged by titanium dioxide and so on.

These plasters are low-cost and can replace natural gypsum and reduce production costs.

5.Gassing agent: Fly ash aerated concrete [2] must have a gassing material as a gassing agent to make the concrete porosity in order to form a lightweight porous structure.

6.Foam stabilizer: After the gas generator is gasped, due to the thin bubble wall, it is sometimes easy to crack and extinguish the foam under the interference of various conditions, which affects the quality of concrete. Therefore, it is necessary to add a foam stabilizer to the slurry.

Aerated concrete equipment can be produced according to the category of raw materials, quality, process characteristics of the equipment, etc. Under normal circumstances, fly ash or silica sand and slag are ground into a slurry with water, powdered lime, an appropriate amount of cement, gypsum and foaming agent, and foaming agent are stirred and injected into the mold frame, and after the static curing foam is solidified, it is cut into blocks or plates of various specifications, which are sent into the autoclave by the steaming and curing vehicle, and are cured by high temperature and high pressure steam to form porous and lightweight concrete products. The selection and quantity of Qiangyuan Machinery aerated concrete equipment production equipment are determined according to the process design scheme, and due to the different aerated concrete production processes, different equipment technologies reflecting the characteristics of the process are formed.

These technical characteristics are reflected in the cutting unit. Zhengzhou Deyi Heavy Industry Co., Ltd. involves the pouring form, mold, trolley structure, transportation of the green body, demoulding, cutting, yard frame, kettle and other equipment are similar.

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Aerated concrete raw materials include sand, fly ash, aluminum powder, etc.