The so-called alkali reversion is actually the problem of hoarfrost on the surface of refractory bricks. During the firing process, due to factors such as technology and raw materials, the brick body will have certain pores, so there will be a certain water absorption rate. The soluble salt is transferred to the surface of the brick together with moisture, forming what we call hoarfrost. In order to avoid such problems, the following problems should be paid attention to during construction.
1. The cement used for construction should be Portland cement produced by a formal manufacturer, and slag cement produced by an informal manufacturer shall not be used. We have found that if the Portland cement produced by a regular manufacturer is used, there will be almost no hoarfrost on the brick surface. If slag cement is used, the hoarfrost on the brick surface will be more serious.
2. the water used for refractory brick construction should be river water, not sea water. If seawater is used in construction, the salt contained in the seawater will also cause hoarfrost on the brick surface. River sand should be used for construction sand, and sea sand should be avoided.
3. Before laying refractory bricks, the cushion should be laid as soon as possible. The advantage of this is that the alkali in the cement cushion will be released in advance before paving, so that a large amount of weathering will not appear on the surface of the refractory brick after paving.
Notes: During the construction process, workers must pay attention to the cleaning of the brick surface. Refractory bricks The brick surface should be cleaned and covered with fine sand during paving. This can prevent the formation of cement ash on the surface of the brick body during the construction of the garden. Remove stains.
Therefore, in order to avoid the problem of refractory bricks and re-alkali, fundamentally speaking, we must choose regular products when purchasing products and follow the correct construction guidelines for construction, so that high-quality construction can be carried out. can be completed.
