In many places in our country, especially in the south, the rainy season lasts for a long time, and stone maintenance projects are generally constructed on dry slabs. The rainy season brings various troubles to stone maintenance projects. It is imminent to solve the problems of stone maintenance projects in rainy seasons, and it is also what various engineering companies are eager to solve. question. The south has entered the rainy season, and the rainy summer in the north is also coming. Even though the maintenance and refurbishment of wet stone is much more troublesome than that of dry stone, the project cannot be delayed due to delays in the rainy season.
The principle of stone maintenance and renovation is that the active ingredients in the curing agent chemically react with the ionic water on the inner surface of the stone pores, so that silicon atoms or siloxane can be chemically bonded with the stone surface, from the outside to the outside. The surface layer of the internal pores of the inner stone grows into a complex network structure. In recent years, with the development of related chemical science and technology, the synthesis ability of new silicone products has also been continuously improved. In this way, the problem of stone maintenance and construction in the rainy season has also been well solved. Now let’s talk about the specific countermeasures and plans for the maintenance and construction of stone in the rainy season: 1. From the perspective of stone maintenance principles, the curing agent is related to the ionic state in the stone. The amount of water on the surface of the stone has no inevitable influence on the curing reaction of the curing agent in the pores, but if the curing is carried out, the curing reaction of the wet stone is slower than that of the dry stone, and the formed curing layer There is no dry board compact.
Sometimes the water content in the pores inside the stone is too high. If a solvent-based curing agent is used, the solute cannot enter the pores of the stone, and the ideal curing effect cannot be achieved. When renovating the rain-soaked exterior wall, you can use the strong penetrating emulsion stone curing agent to paint it several times after the surface of the exterior stone material is slightly dry. For wet stone with water spots, it can only be maintained by washing first, then drying, and then painting.
2. Water spots are deliquescent saline-alkali inside the stone, and these deliquescent saline-alkali will absorb a large amount of water in the air, resulting in obvious wet marks on the surface of the stone. No matter whether the external weather is dry or not, these wet marks will It can't be done. When dealing with this type of board, because the stone surface is alkaline, it can be cleaned to neutral with an acidic cleaning agent, then the stone surface is forced to dry quickly, and then cured with a solvent-based fast-curing stone curing agent. If the general stone curing agent is used for curing, because the curing reaction is relatively slow (usually 24 hours), the salt and alkali will continue to return before the curing reaction is completed.
The solvent-based fast-curing stone curing agent has a faster curing reaction time, and the curing effect can be achieved in 15-40 minutes, and can effectively prevent various types of saline and alkali from returning to the stone surface again, so as to achieve the effect of long-term prevention and control of water spots. 3. Compared with the maintenance and construction of dry stone, wet stone has certain defects. The mesh protective layer formed by the curing agent on the surface of the pores inside the wet stone is not as dense as the mesh protective layer formed on the surface of the pores inside the dry stone. , the protective effect is relatively weak, but it can shorten the construction period and improve the utilization rate of the site in the rainy season, so it has been recognized by many construction units. Now there are stone protective agents suitable for wet stone protection in rainy seasons on the market. Construction units can use this kind of protective agents to protect stones when they encounter rainy seasons or projects with tight construction schedules.
This type of protective agent can be used for protective construction on freshly finished wet specification engineering boards or various stone materials that have been wet by rain. It is understood that at present, many domestic enterprises are implementing the above-mentioned process methods to avoid the influence of the rainy season or humid environment on the stone slab protection construction.
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