The reason of anti-alkali of color brick and corresponding measures

In recent years, the anti-alkali problem of colored bricks has attracted wide attention. Many building exterior wall brick appeared alkaline reaction, resulting in the appearance of falling off, cracking and other problems. Many people do not know the origin of the color brick anti alkali and the response measures, this article will tell you.

Anti-alkali of colored brick refers to the phenomenon of alkaline substance deposition on the surface of colored brick. The main reasons can be summarized as follows:

The material and production process of color brick itself

Color brick is usually made of cement, quartz sand and other materials, if too much alkaline substances are added in the production process, or improper process leads to the alkaline substances in the material can not fully react, it will form alkaline deposits on the surface of the color brick.

Humidity and temperature conditions in the environment

In a humid environment, water will react with alkaline substances in the color brick, producing alkaline deposits. Under the condition of high temperature, the evaporation rate of water is accelerated, which will make the alkaline substance easier to deposit on the surface of the color brick.

Use and maintenance of color bricks

If the color brick is exposed to the wet environment for a long time, or it is not cleaned and maintained in time, the alkaline substances on the surface of the color brick will gradually accumulate and form alkaline deposits.

Construction and use conditions of colored bricks

For example, in the construction process, if there is no adequate waterproof treatment, groundwater or rainwater infiltration into the color brick will accelerate the deposition of alkaline substances. If colored bricks are used in an acidic environment, acidic substances react with alkaline substances, which will also lead to the generation of alkaline deposits.

In order to solve the problem of anti-alkali color brick, the following countermeasures can be taken:

Surface treatment: Before the construction, the surface of the color brick can be pretreated, such as the use of alkaline barrier or brush anti-alkali primer.

Control the construction humidity: in the construction process, to control the construction humidity, avoid excessive water into the color brick and cement substrate between. Appropriate construction technology can be adopted, such as reasonable control of cement mortar water cement ratio, reduce the amount of water used.

Strengthen the basic treatment: before the color brick is pasted, the basic level should be fully processed. Ensure that the base level, dry, and remove the surface of oil, dust and other impurities.

Reasonable construction and maintenance: after the completion of the color brick shop, it is necessary to carry out reasonable maintenance. Avoid color brick surface excessive dry or excessive moisture, can take cover moisturizing, moderate water spray and other methods, maintain appropriate humidity, is beneficial to the curing of cement substrate and reduce the penetration of alkaline substances.

The above is the reason for the anti-alkali of the color brick and the specific countermeasures. For more questions, please click: XT Pigment