The advantages and disadvantages of stone curtain wall

1, natural materials, bright crystal, hard permanent, noble and elegant.

2, freezing resistance: stone in the wet state, can resist freezing and thawing without significant destruction, this performance is called frost resistance. The water in the rock pores freezes when the temperature is as low as minus 20 Celsius, and the expansion of water in the pores is 1/10 larger than the original volume. If the rock cannot resist the force of this expansion, it will be destroyed. In general, if the water absorption is less than 0.5%, its frost resistance is not considered.

3. Compressive strength: The compressive strength of stone varies depending on factors such as mineral composition, crystal thickness, uniformity of cemented material, load surface area, loading effect, and angle formed by cleavage. If the other conditions are the same, the dense material, which is usually fine in crystal grains and adhered to each other, has higher strength. After the dense volcanic rocks are dry and saturated, there is no difference in compressive strength (water absorption is extremely low). In the case of porous and water-resistant cemented rocks, there are significant differences in the strength of drying and moisture.

Disadvantages:

1, heavy stone do many high-rise building wall of the many serious dangers in the construction industry bidding is not fully regulated, many stone curtain wall project who is the lowest cost of who won the bid, there are individual sub-contracting, such a low price bid In order not to lose money, we must cut corners. The high-level (50- to 100-meter-high) stone curtain wall is indeed a lot of low-grade granite with 100-200 yuan per square meter. Is this not dangerous?

2. Many design institutes are not familiar with the curtain wall and draw a range on the drawing to indicate what the curtain wall can be. The stone curtain wall is no exception. It is designed by the successful curtain wall company. Some design institutes ask the structural engineer to review it seriously. However, most design institutes go through the formal review. Isn't it dangerous to design this design?

3. For each construction project, the state requires a supervision company to take charge of the quality. This is absolutely correct and necessary. It is the key to ensure the quality of the project. Unfortunately, many supervision engineers are civil engineers and do not understand the curtain wall, let alone the curtain wall. Stone wall. This is because there is a lack of curtain wall materials in the supervision training materials. Many supervision engineers are retired technicians. Without training, they do not understand the supervision of the curtain wall. How can the quality of the final inspection be related to the construction of quality inspection stations around the country? Learning less about new technologies often encounters difficulties in quality acceptance.

4. Fireproof performance of stone curtain walls is very poor. Especially in high-rise buildings, fires are generally ignited in the room. The fire in the building will increase the temperature of the stainless steel plate and metal structure of the hanging stone plate, so that the steel will soften and lose its strength. The stone plate will be damaged. The formation of slate "rain" from the high-level falls not only poses a danger to pedestrians, but also causes difficulty in firefighting. This is just as the United States World Trade Center was hit and smashed, because the World Trade Organization is all steel structure, the steel has lost its strength due to high temperature softening, and the World Trade Center has fallen from top to bottom.