There is always white powder coming out of the concrete floor next to the balcony washing machine, a

Pansine alkali is a common disease on the surface of buildings, according to its different causes and manifestations, there are a variety of names such as frosting, whitening, whitening, frosting, wall and decorative surface erosion, etc., it is a disease phenomenon that destroys the original building materials with the change of external environment such as temperature and humidity in the soluble saline alkali of soil, adobe, brick, cement, mortar, concrete, masonry, ceramic tiles, coatings and other building materials. The degree of erosion damage is also very different, and the common phenomena are rejuvenation, foaming, pulverization, bulging, hollowing, cracking, peeling, mildew, crystallization, etc.

The hazards are: It affects the visual effect of the façade of the building and the quality rating of the construction project, and gives people a sense of insecurity. Affect the quality of the stucco, the adhesion between the base layer and the surface stucco layer is not enough, and the veneer paste is not firm, which affects the quality of the decoration project and even causes quality accidents.

In the process of water migration in the wall, the erosion and dissolution of the brick and mortar reduce the compressive bearing capacity of the wall, and the pulverization and peeling of the wall surface make the structural section of the wall continuously decrease, and the load per unit area increases, which increases the unsafe factors of the structure.

Nitrate, laundry detergent, powder, etc. are the result of damp and long-term contact with the cement floor. Dilute sulfuric acid solution 1:100

It should be the residual laundry dripping on the floor, causing a chemical reaction

Alkali, right? There will also be these things outside the pot for a long time.