Specific formula ratio of color brick brightener

Color brick brightener production technology

 

Color brick brightener production technology

I. Main production equipment:

1. Mortar mixer, used to mix color brick surface mortar

2. Forced mixer or self-falling mixer, used to mix structural layer

3. Vibrating table

4. Mold requirements:

(1) Inner surface gloss ≥ 50 gloss units

(2) Has a certain rigidity and is not easy to deform.

(3) Has good toughness and impact resistance

II. Materials:

1. Color brick brightener: Among the main raw materials, brightener is the key to affecting the surface brightness of colored bricks. The requirements for brightener are: 40±2%, PH value 8-10, density 1.2±0.02g/ml, no black odor and sediment.

2. Cement: The decorative surface generally uses white silicate cement or colored silicate cement above 425#, and the design method of the basic part is C45 ordinary concrete.

3: Fine aggregate: (white stone or fly-sized flower stone) to make finished products.

III.  Ratio: 

1. Ratio of fine aggregate to cement content: Because fine aggregate can improve the wear resistance of brick surface, and the price of fine aggregate is much lower than cement, so appropriately increasing the amount of fine aggregate can improve the wear resistance of brick surface and reduce cost, but too much fine aggregate is difficult to shape and compact; too little amount is easy to delaminate and crack.

The recommended dosage ratio of cement to fine aggregate is 1:15.5~2.0.

2. Material ratio of cement to whitening agent: Appropriately increasing the amount of whitening agent can significantly improve the durability, wear resistance and glossiness of the finishing layer. If the content is too high, it will have adverse effects on the product, such as the brick surface is brittle, easy to stick to the mold, and the molding time is too long. In addition, it will lead to an increase in product cost. Depending on the cement, the recommended ratio of cement to brightener is 100~2~7.

3. Water-cement ratio: Brightener can greatly reduce the water content of concrete and improve the workability of concrete. Therefore, under the premise of meeting the requirements of mortar molding, the water consumption should be minimized. And the material is very thin.  Poor performance, slow curing, and difficult to shape when drying.

4. The material ratio of the finishing layer is recommended as follows: (experiments are required to determine the most appropriate mixing amount)

Colored cement 100 kg

Fine aggregate 170+10 kg

Brightener 5+/-1 kg

Water 34+2 kg

1. Mix aggregate, colored cement, water, and brightener in proportion.

Aggregate-15%~25% water-stir for 10~15 seconds-cement-stir for 15~20 seconds-whitening agent-stir evenly-shake the mold for standby use.

2. The structural layer is configured according to the general requirements of C45, and the bottom layer is poured into the vibration molding of the existing layer cloth. (Note: After lamination, it needs to stand for 40~45 minutes), and the base material can be poured and cured together with the mold.

3. The demoulding time is generally 3~4 days. Demolding too early will affect the gloss.  The mold should be airtight after take-off, and hung in a dark environment for 24 hours. It should not be exposed to water for 4 days (i.e., it should not be soaked in water). The color brick is suitable for initial storage and maintenance in a humidity environment of 70%~80%.

1. Glossiness of the brightener surface of colored bricks: After testing, it is generally above 20 glossiness units, and can reach up to 50 glossiness units.

2. Improve color durability: Compared with pressed color bricks, bright color bricks generally extend for more than two years in tests under natural conditions.

3. The quality inspection department tests the factory use according to the jc446-91 industry standard, and the results can meet the quality requirements