What is hollow blocks made of ?concrete hollow blocks formula
The cement brick machine production line is used to produce cement when it is used to produce cement. Clay with less sand, 1 Clay: Contains a certain amount of loose particles. Sand can be added to the soil. Clay with less sand and harder, must be ground and then sanded.
Can improve the strength and water resistance of bricks, 2 cement: blended with 10% 425# ordinary Portland cement. Does not crack after immersion in water. Otherwise, the bricks will crack.
Can also reduce the amount of cement, 3 admixture: the addition of a small amount of admixture (reinforcing agent) in addition to improve the brick's induration strength. Reduce the cost of the product.
The strength of the brick is high. Molding water is low, 4 water: water consumption is appropriate. The strength of the brick is poor, the material has large resistance in the mold, the pressure on one side is pressed, and the bottom surface of the brick is not dense; the molding water is much, the bottom surface is wet, and it is easy to be damaged when the mold is discharged. When the moisture content of the sand is 35%, the water consumption at the time of molding is preferably 10%. If the raw material is too much fine, it will drop to 8%.
Cement brick production process operation
The time is too long or too short, 1 mixing time: mixing time can be mixed evenly. The dry mix for 20 minutes has an increase in strength of 1523% wet mix time over 10 minutes, so that the material does not agglomerate. The storage time of the mixed materials is preferably about 2 hours. Will reduce the compressive strength of the brick.
It is best to 500 kg per square centimeter. Under this pressure, 2 molding pressure: the pressure when the clay cement brick is molded. Its products have high compressive strength and good water resistance. The pressure is too low to be compacted.
