厂告诉您制砖成分 Permeable brick factory tells you the ingredients of making bricks
1. The fly ash aerated concrete block produced by lime should use calcium quicklime with useful calcium oxide content greater than 60% and digestion speed of 10 ~ 30mm.
The permeable brick factory has two main effects in the production of its products: supply of calcium ingredients. The useful calcium oxide in quicklime and the active silica and alumina in fly ash react under hydrothermal conditions to produce crystalline or colloidal hydrated calcium silicate and calcium aluminosilicate products, which make the product have Other functions of a certain strength; second, gas and thicken the slurry during production. On the one hand, the alkalinity of the slurry is improved to make Lv Fan gas; on the other hand, the heat released is expelled, and the gas, thickening and hardening of the slurry is accelerated.
2. All kinds of gypsum can be used when gypsum produces fly ash aerated concrete blocks. Its effect in the production of the product is to digest the lime, adjust the digestion speed of lime, and reduce the digestion temperature; increase the strength of the green body, so that the green body can withstand various effects during the transfer, cutting, and steam curing process; Promote the hydration effect of calcium oxide and silica, and improve product strength.
3． The quality of fly ash used in the production of fly ash aerated concrete blocks from fly ash shall comply with the rules of JC409 "Fly ash for silicate building products". Its effect in the production of products is similar to the useful calcium oxide in lime. Under the hydrothermal effect, more hydration products are generated, and the strength and other functional requirements of the product are satisfied.
The requirements of the permeable brick factory point out that the production of fly ash aerated concrete blocks requires other functions such as low dry shrinkage in the same place that requires high strength. Therefore, the fineness requirements of fly ash are not as fine as possible.
4． Fly ash aerated concrete blocks produced by cement should use portland cement and ordinary portland cement. Its effect in the production of products is mainly to adjust the thickening time of the aerated concrete slurry to ensure the stable pouring of the slurry.
At the same time, the hydration, agglomeration, and hardening of cement can improve the strength of the green body, and can supply Ca (OH) 2 with the silico-aluminum component in fly ash, which makes the product have a certain strength and good durability.