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The advantages and disadvantages of three kinds of curtain wall contrast
The advantages and disadvantages of a, stone curtain wall
Advantages:
1, natural texture, bright and glittering and translucent, hard and permanent, noble and elegant.
2, frost resistance: stone under wet condition, resistance to freezing and thawing without significant vandals, this performance is called frost resistance. Within the rock pore water in low temperature to minus 20 degrees Celsius, the freezing, pore water in expansion is larger than the original size 1/10, rock failure to resist the expansion force of what happened, will appear damage phenomenon. Do not consider when prajnaparamita bibulous rate is less than 0.5%, the antifreeze performance.
3, compressive strength, compressive strength of stone material will because of mineral elements, crystal thickness, the uniformity of cementing material, load area, factors such as load effect and cleavage into Angle, and differ somewhat. If all other things being equal, crystal particles usually small and bond with each other the density of the material, with high strength. Dense volcanic rocks in a dry and saturated water, compressive strength, bibulous rate is very low and no difference, if cemented rock porosity and fear of water, the dry and wet strength, there is significant difference between.
Disadvantages:
1, heavy stone do high-rise building external wall of serious danger in construction bidding is not fully specification, a lot of stone curtain wall project whose cost is the lowest who won the bid, a few of the subcontract, such low price bidding, in order not to lose money to cut corners. Top (50 ~ 100 m) stone curtain wall with 100 ~ 200 yuan a square meter of the low level of granite really many, it's not dangerous?
2, a lot of design institute of curtain wall are not familiar with, draw a range on the drawings, indicate what curtain wall. Stone curtain wall is not exceptional also, by the curtain wall companies own design, some design institute structure division, please carefully review, but most of the design institute of the formal review, not design close to it's not dangerous?
3, various construction projects, the national requirements have supervision company is responsible for the quality, it is entirely correct and necessary, is the key to guarantee the project quality, but unfortunately there is a lot of supervision engineer is a civil engineer, don't understand the curtain wall, not to mention stone curtain wall. This is because in the supervision training materials without a curtain wall materials, a lot of supervision, a retired technical staff to bear, no trained and ignorant of the supervision of curtain wall, how can the good final quality? Around the construction quality inspection station, since there is little study to new technology, also often encounter various difficulties in quality inspection.
4, stone curtain wall of fire prevention performance is very poor, especially in high-rise buildings, fire in general are light indoors, can make hanging tablets in the building of the fire temperature, stainless steel plate and the metal structure to soften steel and lose strength, the SLATE will develop from the top slab "rain", is not only dangerous to pedestrians, also create difficulties to fire put out the fire. It just like the United States was the world trade center fell down, because the wto are all steel structure, steel high temperature softening lose strength, the world trade center to form a top-down caving.
Second, the advantages and disadvantages of glass curtain wall
Advantages:
Glass curtain wall is a new type of contemporary wall, it was given to building the biggest characteristic of the architectural aesthetics, function, building energy efficiency and building structure factors such as organically unify, buildings present a different color from the different Angle, along with the change of sunlight, moonlight, lighting gives a person with dynamic beauty. The continents in the world's major cities are built magnificent glass curtain wall construction, such as New York's world trade center, petroleum building, the sears tower in Chicago is adopted the glass curtain wall. Hong Kong and Shanghai bank of China tower, Beijing Great Wall hotel fellowship buildings also have adopted.
Disadvantages:
Glass curtain wall also exist some limitations, such as large energy consumption, light pollution and other issues. In addition, the natural beauty of glass curtain wall is bright and clean transparent is not resistant to pollution, especially in atmospheric dust content more, air pollution, the lack of rain of the northern region, glass curtain wall dust nurgle extremely easily, the urban landscape, rather than "light", but "face". The inferior material used, construction quality is not high, appear uneven color, different corrugated, cannot be controlled by light reflection, cause the clutter of light environment. But the problem with appearance of new material, new technology, is gradually into the architectural modeling, building material, building energy conservation and comprehensive study of the system, as a whole the design problems are further discussed.
The advantages and disadvantages of three, metal curtain wall
Advantages:
Leading products of metal curtain wall 椔 ripple change Angle? So far, the metal curtain wall in the aluminum sheet curtain wall has been dominant in the metal curtain wall, lightweight material, reduce the load of building and choose for high-rise building provides a good condition; Waterproof, anti-fouling, corrosion resistant performance is good, guarantees the building exterior surface lasting new long; Processing, transportation, installation, construction is easy to implement, provide strong support for the widely used; The diversity of color and can be combined into the appearance of different shapes, expand the architect's design space; High performance and low cost, easy maintenance, long service life, accord with the requirement of owner. Therefore, aluminum curtain wall, as a kind of extremely rich wallop of architectural form, popularity.
Disadvantages:
Resistance to deformation ability: 1, curtain wall system must be in every important parts of the curtain wall system for science and mechanics calculation, such as earthquake, typhoon, weight of wind pressure, and temperature effect on the curtain wall system, the influence of the built-in parts, connection systems, keel, panel and fastener to check carefully, to ensure the safety of the curtain wall.
2, whether the plate connected by floating; Floating connection to ensure the recovery after curtain wall deformation ability, ensure the integrity of the curtain wall and doesn't make the curtain wall deformation caused by the force, avoid the happening of curtain wall drum convex or concave surface.
3, plate fixed way: the installation of fixed way to plate flatness of the plates plays a decisive role. Plate does not agree all the fixed point of the surface deformation of the material will influence effect, so the plate fixed way must adopt spacer clamp fixed way, to ensure that the curtain wall surface roughness.
4, composite material surface materials, sealing side whether there is reinforcing measures: for flanging composite panel materials keep only the positive plate thickness, thickness thin, strength is reduced, so the edge must have a reliable reinforcement measures.
5, the back plate is reasonable set up to strengthen, to increase the surface strength and stiffness. And the distance of stiffener arrangement to strengthen itself strength and stiffness, must meet the requirements, to ensure the use function and safety of curtain wall.
6, waterproof sealing way is reasonable: waterproof seal, waterproof structure, internal waterproof glue sealing, different way of sealing the price also is not the same, choose suitable sealing methods used in engineering, ensure the function of the curtain wall and outside decoration effect.
7, selects the material whether meet the specification, standards and design requirements.
