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Transparent concrete

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Transparent concrete

  2. 2.  Transparent material means which can be seen from one part to another part.  Light transmitting concrete (LiTraCon) also known as translucent concrete, is a concrete based building material having light-transmissive property.  It is a new technique different from normal concrete. Translucent concrete allow more light and less weight compared to normal concrete.  Light-transmissive property is mainly due to uniform distribution of optical fibers throughout its body.  It is available as prefabricated building blocks and panels.  It is used in floors, pavements, ceiling, load-bearing walls, partition walls etc.
  3. 3. HISTORY  In 2001 the idea of transparent concrete was found by Hungarian architect Aron Losonczi.  Successfully produced in 2003, named LiTraCon.  In 2004, he started a German company, named LiTraCon and started producing LiTraCon commercially. Aron Losonczi
  4. 4.  The two basic materials used for making transparent concrete: 1. Fine Concrete 2. Optical Fibers  Fine Concrete: consists of cement and fine aggregate such as sand & instead of coarse aggregate optical fibers are used.  Optical fibers: 1. An optical fiber is a hair thin cylindrical fiber made of glass or transparent dielectric medium 2. Its function is to guide visible infrared light over long distances.
  5. 5. 3. It has three parts :  CORE:- central tube of very thin size made up of optical transparent dielectric medium and carries the light from transmitter to receiver. The core diameter can vary from about 5um to 100um.  CLADDING:- outer optical material surrounding the core having reflecting index lower than core. It helps to keep the light within the core throughout the phenomena of internal reflection.  BUFFER COATING:- plastic coating made of silicon rubber which protects the fiber. The typical diameter of fiber after coating is 250um -300um. 4. Three kinds of optical fiber: I. multimode graded-index fiber. II. multimode step-index fiber. III. single mode step-index fiber.
  6. 6. STRUCTURE 7
  7. 7. MATERIALS CONTINUED......  Cement: Ordinary Portland cement is used for transparent concrete.  Sand: The size of sand should pass through 1.18mm sieve. 8
  8. 8. CONTINUED......  Water: Water to be used for transparent concrete should be of drinking water quality.  Optical fibers: Thickness of the optical fibers can be varied between 2 µm and 2 mm. 9
  9. 9.  Transparent concrete works based on “Nano-Optics”.  The principle behind the transmission of light in an optical fiber is total internal reflection. The light should incident at an angle greater than the critical angle.  In the optical fiber the rays undergo repeatedly until the total number of reflections run out to the other end of the fiber even if the fiber is bent.
  10. 10. MANUFACTURING PROCESS  The manufacturing process of transparent concrete is almost same as regular concrete.  Small layers of concrete ( with a ratio of 1:2 for mixing ) are poured into the mould and on top of the each layers, a layer of fibers is infused.  Fabric and concrete are alternately inserted into moulds at intervals of approximately 2mm to 5mm. Another Method-  Many holes are punched on side walls of the mould.  Optical fibers have to be run through these holes from one end to another & clay is used to withstand optical cables for support and concrete is poured into it.  Adding 4% to 5% optical fibers by volume into the concrete mixture.  1000’s of strands of optical fibers are cast into concrete.  The casted material is cut into panels or blocks & polished typically.
  11. 11.  choosing a desire mould.  make a needed design.  attach clay on the bottom of the mould.  induce optical fiber cables at desired shape.  after that pour fine concrete at its approximate ratio.  set to dry and allow to curing. EXPERIMENTAL SET UP
  12. 12.  Finally we get the transparent concrete in desire shape.
  13. 13. STRENGTH PROPERTY  The casted material is cut into panels or blocks of the specified thickness and the surface is then typically polished, resulting in finishes ranging from semi-gloss to high-gloss. PRODUCT LITRACON - LIGHT TRANSMITTING CONCRETE Form Prefabricated blocks Ingredients 96% concrete, 4% optical fibre Density 2100-2400 Kg/m3 Block size 600mm x 300mm Thickness 25-500mm Colour White, Grey or Black Fibre distribution Organic Finished Polished Compressive strength 50 N/mm2 Bending Tensile strength 7 N/mm2
  14. 14. APPLICATIONS Transparent concrete blocks is suitable for :  Floors  Ceiling  Pavements  Load-bearing walls  Partitions wall 15 Panels illuminate in different colours
  15. 15. Contd…  In furniture for the decorative and aesthetic purpose.  Light sidewalks at night.  Increasing visibility in dark subway stations.  Lighting indoor fire escapes, in the event of a power failure. 16 Stairs
  16. 16.  Energy saving can be done by utilization of transparent concrete in building.  It has very good architectural properties for giving good aesthetical view to the building.  Highest UV resistance. ADVANTAGES 17
  17. 17. 1) Very high cost about $1000/m2. 2) Labours with technical skills are required to use it. 18
  18. 18. 1)THE EUROPE GATE  It is located in Fortress Monostor in the Hungarian town, Komarom  The sun illuminates the 37.6ft large Litracon piece of the statue in the mornings and late afternoons  In night an even more impressive view can be seen because of the embedded light sources. 19 Day view Night view
  19. 19. 2) CELLA SEPTICHORA , PECS, HUNGARY It has a door made of Litracon Panels set in a steel frame. CONTD… 20 Day viewNight view
  20. 20. 3) NEW HEADQUARTERS OF BANK OF GEORGIA:  Walls, walks, receptions, offices and consultation desks are illuminated by transparent concrete CONTD… 21
  21. 21.  Light transmitting concrete is an emerging trend in concrete technology.  Its initial cost is high. But, routine maintenance is not required and in long run it may be advantageous.  It’s a green building material reducing the lightning cost during day time. It’s proved to provide both aesthetic appearance and structural stability.  In future the it’s cost is expected to decrease.  It is one of the best applications of optical glass fibers which is related to technical textiles. CONCLUSION 23
  22. 22. REFERENCES   Https://     Concrete power point PPT presentation  concrete/92  quiz.html