Highest bridge than eiffel tower?

Chenab river is passing through Jammu and Kashmir (J&K). For the convenience of people & railways, Indian Railways decided railway bridge will construct on the Chenab river, near Salal Hydro Power Dam which is in between Bakkal and Kauri in the Reasai district which is a part of Udhampur - Srinagar - Baramulla rail link project. This bridge is called Chenab railway bridge & it is also known for World's Highest Single Arch Railway Bridge. 

Photo via business today

Characteristics

• Owner : Indian Railways
• Construct trough : AFCONS Infrastructure
• Type of Design : Single Arch 
• Designed as : Blast Proof
• Help in Design : IISc Bangalore & DRDO
• Material Used : Special Steel & Concrete
• Height of Bridge : 1178 ft.
• Length of Bridge : 4314 ft.
• Span of Arch : 1532 ft.
• Length of Arch : 1570 ft.
• Spans in Bridge :  17 No.

Photo via financial express

It makes 

• The World's Highest Single Arch Railway Bridge
• The bridge with longest span in the Indian Broad Gauge Railway Network
• It is 35m higher than the Eiffel Tower in Paris

Let's see the overview of that bridge at the time of construction. 👇👇

U.V. Radiation : CORONA

Ultraviolet radiation light connection with COVID'19. How it is true, Yes it is true. Let's know it.

Ultraviolet light is used for kill the germs, bacteria as well as viruses. It is also used for killing SARS CoV-2. Ultraviolet rays created by naturally from the sun but it also created by artificially.

Photo via economictimes.indiatimes.com

Why World Health Organisation declares Coronavirus named as COVID'19 ?

Origin of coronavirus is SARS CoV-2, CoV taken a part in that name & after that continue by suffix 19 in COVID'19 that means coronavirus was found in the year 2019 after considering World Health Organisation declares coronavirus named as COVID'19.

Types of U.V. light :

• UVA (Wavelength ranges from 315-400nm)
• UVB (Wavelength ranges from 280-315nm)
• UVC (Wavelength ranges from 100-280nm)

In that the UVC light is used for disinfect the surface, atmosphere means air, liquid. It ranges from 100-280 nm. 

Photo via factcheck

Why UVC light is used for disinfection?

UVC light has more energy. UVC light is absorbed from sun in the Earth ozone. So you are not normally exposed to it. However, there are various phisically made source of UVC light. In UVC light not contain harmful radiation's that causes not only skin burn, skin cancer but also skin aging. Therefore this light is used for disinfection.

Why other light is not used for disinfection instead of UVC light?

Following are the reasons for UVA & UVB light :

• UVA Light - It has the lowest amount of energy. When you are going to outside in the sun then your skin being contact with UVA light & it connects with skin damages and skin aging.
• UVB Light - It settle middle in the UV light spectrum. Some part is sun light contain UVB light & UVB light contain main type of UV light connect with burn causes skin cancer.

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World's Highest Multiple Arch Dam

Meishan Dam is the world's highest multiple arc dam. This dam is situated in East China which make the largest irrigation system in China. The size is 130km from Shine River to Huaikou. It is a largest conservatory & hydropower project.

Photo via en.people.cn

Specifications 👇👇

• Name : Meishan Dam
• Structure Type : Arch Dam
• Hight : 88m
• Start of Construction : Year 1954
• Construction Complete :  Year 1956
• Dam Ready For Utilise : Year 1958

Viewing experience of World's Highest Multiple Arch Dam by clicking below 👇👇

L.E.C. (Light Emitting Concrete)

In the year 2001 Light emitting concrete idea was first introduced by Hungarian architect 'Aron Losonzi'. First light emitting concrete block was successfully produced in year 2003 by adding large amount of optical fibre. It is the mixture of optical fibre & concrete. Light emitting concrete also known as self luminous concrete or glow in the dark concrete. This concrete catch energy during the daytime means this concrete absorb the solar energy and convert it into the light. 

Photo via link.springer.com

Materials Used for L.E.C.  :

• Cement
• Fine Aggregate
• Coarse Aggregate
• Optical Fibres
• Water

Elements of Optical Fibre :

Elements of Optical Fibre

• Core - The thin glass center of fibre where light transfer is called core.
• Cladding - The outer material surrounding of core that reflect the light to core.
• Buffer Coating - It is the plastic coating that protects the fibre from water damage as well as moisture.

Uses of L.E.C.  :

• For decorative & aesthetic purpose 
• This concrete is used for constructing illuminate walls
• It is suitable for pavement, floors and also for load bearing walls
• Used for partition wall where the light is not available in that area
• In the area of creative design
• For roadways, bridges, bike path, etc.

Photo via thearchitecturetimes.com

Advantages of L.E.C. : 

• Energy saving material
• Where light is not able to come then that place use L.E.C.
• Lifespan is about 100 years
• Totally eco-friendly because gas realease during manufacturing process is water vapour
• It can expand light for approx. 12 hr. 

Disadvantages of L.E.C. :

• It is so costly because of using optical fibres
• Casting of L.E.C. blocks is difficult
• Special skilled labour is required 

Photo via australiandesignreview.com

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