High-rise buildings are made of concrete, but they will burn up after a fire. Why? superplasticizer

If you are looking for high-quality products, please feel free to contact us and send an inquiry, email: brad@ihpa.net

Concrete is one of the most heat-resistant and fire-resistant building materials to day. It is mainly made from sand, accumulations, concrete and water combined in a specific proportion and does not consist of combustible parts. From an additional point of view, concrete is also a type of masonry, such as common red bricks and rocks, which will certainly not burn.

Concrete is made up of a variety of accumulations, and they will certainly not be damaged by fire unless they are revealed to heats of thousands of degrees Celsius. Keep in mind that this has to do with destruction, not burning. Normally speaking, in order to affect the concrete framework, the called for temperature must reach at the very least 1100 ℃. Such a temperature is additionally far more than the temperature level of a general high-rise fire. In a much more severe high-temperature state, concrete will not burn, yet it will decay and end up being breakable. The decomposition caused by very high temperatures is called "removing" in academic community.

Take a strong firewall software as an instance. If it is subjected to a high temperature of 1099 ℃ for approximately 4 hours, the concrete will certainly disappoint any type of structural damages. If it is a basic timber framework, this temperature level and period will enable it to burn and disintegrate entirely.

Security of concrete

As far as the performance of concrete is concerned, concrete itself will certainly not ignite and can prevent the spread of fire to a specific level. It is non-flammable on its own, so the flame can not boost the fire by burning concrete. Rigid foam board is very usual in home decoration. When the concrete is put, the building and construction team generally lays a layer of rigid foam between the concrete walls. Stiff foam can play a specific duty in insulation. In the style of modern high-rise buildings, numerous residences generally install cables and a multitude of electric tools materials in the wall for the sake of attractive layout.

On top of that, this layer of rigid foam can additionally play a role in insulation. In winter, the wall surface will not shed warmth rapidly, causing your house to cool off rapidly. Certainly, from the point of view of material choice, the inflexible foam itself is not flammable and will thaw when revealed to high temperatures. Nevertheless, it is not ruled out that this layer of textile will not shed in severe atmospheres.

The state of various accumulations throughout the heating process, but because some structures cut corners in terms of products, it ought to be non-flammable stiff foam, and this layer of foam will certainly enter into contact with electric wires.

With time, it isn't very easy to make sure that the cable will not short-circuit because of aging and spark the foam in the wall surface. Based upon the possible causes of fire and the scenario of fire getting out of control discussed above, the majority of the moment, it is caused by human negligence. For instance, unextinguished cigarette butts or randomly piled combustible products that spontaneously ignite due to high temperature, etc

On top of that, the design of skyscrapers themselves likewise helps the spread of fire to a certain degree. The upright passages in high-rise buildings are much longer, that makes it less complicated for fires to pass through fire flows, lift shafts and various other locations to trigger a "chimney result." In the chimney result, interior air rises or falls along an area with a vertical slope, thus creating air convection to be boosted. One of the most common is the procedure of a boiler, where warm air increases with the smokeshaft and leaves on top of the smokeshaft. As the hot air in the chimney leaves, outside air is ultimately attracted to fill the gap in the combustion-supporting materials, making the fire more tough.

For instance, in the Garley Structure fire in Hong Kong in 1996, when the building was changing lifts, workers built bamboo scaffolding in the lift shaft. However later on, when the employees were welding and reducing metal, the high-temperature metal items that dropped in the elevator shaft stired up the wooden debris and structure materials in the elevator lobby on the second floor. This caused a large fire, and the fire was so intense as a result of the large quantity of combustibles and enough burning conditions that the structure eventually ended up being a tragedy.

Consequently, the root cause of fire in high-rise buildings is not the structure itself but human aspects. This is why, till today, there are still safety monitoring organizations that remain to emphasize the issue of fire security in high-rise buildings.

Distributor

Cabr-Concrete is a supplier of Concrete Admixture with over 12 years of experience in nano-building energy conservation and nanotechnology development. It accepts payment via Credit Card, T/T, West Union and Paypal. TRUNNANO will ship the goods to customers overseas through FedEx, DHL, by air, or by sea. If you are looking for high quality Concrete Admixture, please feel free to contact us and send an inquiry.

All articles and pictures are from the Internet. If there are any copyright issues, please contact us in time to delete.

Inquiry us