Who is behind! ! ! The stone curtain wall is easy to get dirty, why?

　　The content of this article is organized and released by the editorial department of [China Curtain Wall Network ALwindoor.com]:

　　Hello, every designer! At present, the average annual stone consumption of stone curtain walls in our country has already exceeded 30 million square meters. No matter which city we are in, we can quickly find large-scale buildings with beautiful design and use of stone curtain walls!

　　However, with the popularization of stone curtain walls comes the pollution of stone curtain walls. Even some glorious buildings will be flooded with pollutants less than three years after the completion and acceptance, making the overall building look old and old.

　　Whether it is cleaning, maintenance, or replacement, it will bring great costs to developers and property companies. Therefore, we can only carefully analyze the various possible causes that may cause the stone curtain wall to become dirty at the beginning of design and construction to eliminate hidden dangers in time It can help the building maintain its bright and beautiful appearance for a longer period of time!

　　So, what should we do?

　　01. Avoid setting the wrong drainage system

　　In many building examples, we often find that the same building, under the same material conditions, often have different levels of pollution in different places. If you observe carefully, it is not difficult to find that in some cases, there are often more polluted locations. At least there will be some water accumulation problems.

(Once the stone curtain wall seeps, it will have a great impact on the appearance and performance)

　　Where does the water accumulation problem come from? Generally speaking, the problem often occurs in two aspects. One is that the drainage slope is designed, but the wrong drainage direction is set, which causes the top water to drain inward, forming a certain amount of water.

　　When the water flows, it drives the accumulation of dust, causing the dust to adhere to the surface of the stone, forming water marks, and over time, there will be more serious pollution on one side. On the other hand, the problem of stagnant water may also be caused by the unreasonable installation of subsequent drainage pipes.

　　As a functional existence, the drainage pipes of many buildings are often exposed on the exterior surface of the building. In order to pursue the integrity of the facade of some high-end villas, the drainage pipes are often set inside the stone curtain wall, which of course can add a lot of color to the appearance. .

　　However, it violates the principle of “form obeys function”. Once the drainage pipe seeps, it is difficult to investigate it in the first time, and it is often found that the water seeps out of the stone panel. By then, it was too late.

　　These two factors that cause hidden dangers of stagnant water are relatively easy to overlook in architectural design in recent years. Due to long-term sewage infiltration, it will cause irreversible damage to the strength and appearance of the stone itself.

　　Also, problems such as broken drain pipes are often difficult to investigate at the first time. Therefore, in actual operation, we should try our best to avoid setting up the wrong drainage system and try to avoid these hidden dangers of water accumulation.

　　02. Try to choose the right surface material

　　There are many kinds of stone, and different stone products have different durability, corrosion resistance and weathering resistance.

　　Natural, there are many stones that are only suitable for indoor use, but are not competent for the complex and changeable natural environment outdoors. If it is used for a long time, its performance and hardness will be affected to a certain extent.

　　In addition, some stones, such as sandstone, have many pores on the surface. Over time, they are prone to dark spots due to the growth of mold, and even green moss grows, which brings great trouble to the nursing work.

(Granite is an ideal outdoor stone curtain wall material)

　　Therefore, in actual work, we should analyze the situation in detail. Through careful inspection and analysis of the climatic conditions around the building and the actual needs of the project design, try to choose the right stone as the curtain wall material, such as granite.

　　Of course, before installation, we must also pay attention to the processing of surface materials. On the one hand, after selecting a suitable stone panel, the six sides of the row need to be immersed for protection to avoid other pollution sources on the outside.

　　It is necessary to ensure that the waterproofing measures are in place as much as possible, and the brushes should not be missed; on the other hand, for the original large pores, cracks, and unequal defects on the base surface, it needs to be repaired and smoothed as much as possible.

　　03. Install the insulation material in the correct way

　　The installation process of many stone curtain walls is often accompanied by the filling of insulation materials. In many practical cases in the past, the staff generally used thermal insulation cotton.

　　In most cases, the outer surface of the thermal insulation cotton will be covered with a layer of aluminum foil when it is transported to the site, which can isolate moisture and keep the thermal insulation cotton dry. However, many workers in the construction unit do not understand its use and are simple. People think that it is just packaging, and it is everywhere to tear it up during the construction process.

　　As a result, once the rainy season occurs, the weight of the thermal insulation cotton increases after fully absorbing the water, causing it to collapse from the original structure, and the thermal insulation material cannot achieve effective thermal insulation and energy saving effects.

　　What's more serious is that the thermal insulation cotton collapses and causes waste cotton to accumulate at the bottom. The thermal insulation cotton that has absorbed enough water adheres to the stone panels and connectors, which not only easily causes oxidation, but also causes moisture to flow from the depths of the pores of the stone. Form uneven water spots. Therefore, in the actual operation process, we must also pay attention to installing the insulation material in the correct way.

(Insulation materials are an indispensable part of the stone curtain wall installation process)

　　04. Use qualified sealant and adapter pendant

　　According to past experience, stone sealant pollutes the stone panel the most.

　　Due to the characteristics of its material, the sealant often penetrates from the side of the stone to the inside during the process of erosion of the stone. Over time, no matter it is physical cleaning or chemical cleaning, it cannot be effectively cleaned.

　　Therefore, during the construction process, we should try our best to choose a good quality sealant, and before using it, we need to conduct an oil leakage test on the selected sealant.

　　Only pollution-free sealant can prevent all kinds of dirty and oily substances from penetrating into the stone and causing pollution.

(The pollution of inferior stone sealant to the surface material is irreversible)

　　In addition, the curtain wall structure needs to be connected with stainless steel or aluminum alloy. In the past, due to cost considerations, stainless steel was usually used more widely. However, there are also some construction companies who cut corners and use stainless steel to make up for it.

　　In the early stage of construction, poor-quality adapter pendants will not have a great impact on the building, but as the years of use increase, the galvanized layer on the metal surface will be worn out, and iron oxide will be formed under the oxidation of water, and rust will again It is easy to gradually penetrate outside through the connecting part, resulting in rust marks on the stone panel.

　　Therefore, during the construction process, we should also strictly control the quality of the adapter to avoid such accidents.

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