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The south enters the rainy season, and the rainy summer in the north is also coming. Damp stone care renovation is much more troublesome than dry stone, but the project can not be postponed due to the rainy season.
In many places in China, especially in the southern part of the rainy season, stone conservation construction is generally carried out on dry boards. Due to the rainy season, the maintenance of the stone has brought various troubles. It is urgent to solve the problem of stone construction and maintenance in the rainy season. All construction units have dreamed of solving problems they want to solve.
The principle of stone conservation and refurbishment is that the active ingredient in the curing agent chemically reacts with the ionic water in the surface layer of the inner wall of the stone pore, so that the silicon atom or siloxane can be chemically bonded to the surface of the stone, and the surface of the pore inside the stone is externally inward. It grows into a complex network structure. In recent years, with the development of related chemical technology, the synthesis ability of new silicone products has also been continuously improved. The maintenance and construction problems of the rainy season stone have also been well solved. Now we will talk about some specific countermeasures and plans for the maintenance and construction of the rainy season stone. From the perspective of stone conservation principle, the curing agent reacts with the ionic water in the stone. The amount of moisture on the surface of the stone does not have an inevitable effect on the curing reaction of the curing agent in the pores, but the maintenance of the wet stone is relative to the dry stone. In fact, its curing reaction is slow, and the formed protective layer is not dense. Sometimes the amount of water 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 is not achieved.
When renovating the outer wall that is wet by the rain, you can wait for the surface of the outer wall stone to dry a little and then apply it with a strong penetrating lotion stone curing agent (at least 2 times). For wet stone containing water spots, it can only be cured by washing and then drying.
The water spot contains the dehydrated salt and alkali inside the stone, and these deliquescent salines absorb a large amount of water in the air, causing obvious wet marks on the surface of the stone. These wet marks are dry regardless of the weather changes. Nothing. When processing such plates, because the surface of the stone is alkaline, it can be cleaned to neutral with an acidic cleaning agent, and then the surface of the stone is forcibly dried quickly, and the solvent-type fast curing stone curing agent is used for curing. If the general stone curing agent is used for curing, the curing reaction is relatively slow (usually 24 hours) and the salinity will continue to return before the curing reaction is completed. The solvent-type 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, thereby achieving the effect of long-term prevention and control of water spots.
Compared with the maintenance construction of dry stone, wet stone has certain defects. The protective layer of the curing agent formed on the surface of the pores of the wet stone is not as dense as the mesh protective layer formed on the surface of the pores of the dry stone. The effect is relatively weak, but it can shorten the construction period and improve the site utilization rate during the rainy season, so it has been recognized by many construction units.
Nowadays, stone protective agents suitable for the protection of wet stone in the rainy season have appeared on the market. When the construction unit encounters the rainy season or the project with tight construction period, the protective agent can be used to protect the stone. This kind of protective agent can be applied to the newly processed wet specification engineering board or all kinds of stones which are wetted by rain. It is understood that some existing domestic enterprises are implementing some special techniques to avoid the rainy season or humid environment and affect the slate protection construction.
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