Concrete canvas shelters a type

It is a reinforced cement cloth attached to a inflatable structure which can be readily used as a secured structure at war zones, war affected areas and refugees camps, covid-19 treatment centers etc.

1. CONCRETE CANVAS SHELTERS - A TYPE OF RIGIDIFIED INFLATABLE STRUCTURE GUIDE: ARUN. K. A BY AKHIL. A. M SYANECE005 CIVIL DEPT. SIMAT 1

2. CONTENT Introduction Scope Concrete canvas shelter(CCS) Parts of CCS Rigidified inflatable structure(RIS) Concrete cloth Inflatable building Vs Air-supported buildings Key facts of CCS Erecting procedure for CCS 2

3. CCS variants Advantages Limitations RIS application Application of concrete cloth Conclusion Reference 3

4. INTRODUCTION Concrete is most extensively used for construction. There are many advantages of concrete, but one of the drawback is that, it is not flexible. This drawback can be overcome by concrete cloth Concrete cloth is majorly applied in concrete canvas shelter(CCS). The CCS technology dramatically influenced over the pas few years. 4

5. SCOPE Can be used as emergency shelter on regions where disaster like natural calamities, war occurred. Can be used for storing food materials, weapons etc. Can be used as field hospitals. Can be used as a permanent house for homeless. Can be used as tourist tents in hotels and resorts. Can be used as in-situ office for engineers. Can be used for scientist working in remote areas like Antarctica, Amazon forest etc. 5

6. CONCRETE CANVAS SHELTER(CCS) CCS are rapidly deployable semi-permanent buildings which require only air and water for construction. Concrete Canvas Shelters (CCS) are more operational and financial than conventional tented shelter. They provide a hardened structure from the very first day of operation. They provide much better environmental protection, security and improved medical capability. The key to Concrete Canvas Shelter is the use of inflation to create a surface that is optimized for compressive loading. 6

7. CONCRETE CANVAS SHELTER 7

8. 8

9. Parts of CCS Rigidified inflatable structure – Inner bladder. Concrete Cloth – Outer covering. 9

10. RIGIDIFIED INFLATABLE STRUCTURE (RIS) Rigidified inflatable structure (RIS) membranes are typically composed of high-strength fibres embedded in a more elastic polymeric matrix. In CCS, polyethylene(PE) and a reactive plasticizers is used as semi-IPN to make the inflatable membrane. These flexible membrane structures after deployment gets harden because of chemical or physical change of the membrane. 10

11. RIS CROSS SECTION 11

12. CONCRETE CLOTH Concrete cloth is a flexible, concrete impregnated fabric that hardens when hydrated, to form a thin, durable, water proof and fire resistant concrete layer. Concrete cloth consists of a 3- dimensional fibre matrix containing a specially formulated dry concrete mix. PVC backing on one surface makes it waterproof. 12

13. 13

14. INFLATABLE BUILDING VS AIR-SUPPORTED BUILDINGS An inflatable building is a structure constructed using two layers of membrane connected together, typically using spars made from the same material. The cavity formed between the layers is pressurized with air producing a rigid structural element which allows large span structures to be achieved. Since a much lower volume of air is pressurized, inflatable buildings requires only less power for continuous operation. 14

15. Air-supported buildings requires an airlocks at all the access points to prevent air being lost, when doors are opened since the entire occupied space of the building is pressurized. The air pressure on the envelope is equal to the air pressure exerted on the inside ground, pushing the whole structure up. It needs to be securely anchored to the ground 15

16. INFLATABLE BUILDING 16

17. AIR-SUPPORTED STRUCTURE 17

18. KEY FACTS OF CCS Rapid Insulating Durable Secure Semi-Permanent No foundation required Easy demolition Fire resistant 18

19. ERECTING PROCEDURE Step 1- Delivery 19

20. Step 2 - Inflation 20

21. Step 3- Hydration 21

22. Step 4- Setting 22

23. CCS VARIANTS Manufactures supplies CCS in two variants – CCS 25 CCS 50 23

24. CCS 25 PRE DEPLOYMENT LENGTH - 2.61m WIDTH - 2.30m HEIGHT - 1.13m WEIGHT - 1900kg POST DEPLOYMENT LENGTH - 5.00m WIDTH - 5.60m HEIGHT - 2.45m AREA - 25m 2 24

25. CCS 50 PRE DEPLOYMENT LENGTH – 2.90m WIDTH - 2.24m HEIGHT - 1.70m WEIGHT - 3100kg POST DEPLOYMENT LENGTH – 9.00m WIDTH – 5.60m HEIGHT – 2.60m AREA - 50m 2 25

26. ADVANTAGES CCS is secure with good earthquake performance protecting personal and equipments in unstable environment . Provides head start in rebuilding infrastructure of a shattered community. Structure can be delivered sterile which helps to perform surgical procedures from the first day of crisis. An asset to post disaster economy recovery. 26

27. LIMITATIONS CCS requires lot of water to erect. Do not jet high pressure water directly onto the Concrete cloth as this may wash channel in the material. Working time will be reduced in hot climates. If Concrete cloth is not fully saturated, the set may be delayed and strength get reduced. 27

28. RIS APPLICATIONS ARK NOVA Ark Nova is the first large-scale inflatable concert hall ever constructed. Constructed in response to the massive earthquake and tsunami that hit Japan in the year2011. Has a capacity of 500 people inside its translucent membrane that is made of a PVC-coated polyester of 2000 square meters. 28

29. 29

30. 30

31. DITCH LINING Rapidly uncontrolled to form ditch or tank lining. Protects water from seeping in ditch. It is significantly quicker and less expensive to install, than conventional concrete. 31 APPLICATION OF CONCRETE CLOTH

32. 2.SLOPE PROTECTION In addition to shallow erosion or reduction of shear strength caused by seasonal rainfall , weight above the slope, digging at mid-slope or at the foot of the slope. Concert cloth can be used as slope stabilization and other erosion control applications such as temporary and permanent slope protection. 32

33. 3.PIPELINE PROTECTION Concrete cloth can be used as a coating for overland or underwater pipeline protection. Provides safety against corrosion and direct impacts on pipes In remote areas it can be used to coat steel pipe on site without expensive wet concrete application plants. 33

34. 3.SAND BAG REINFORCEMENT CC has been proven to prevent the degradation of sandbags from sustained incoming fire, outgoing muzzle fly ash and environmental exposure. There is currently over 5500sqm of CC being used by the British Army in Afghanistan 34

35. CONCLUSION Concrete Canvas is a clever means to erect a sturdy, semi-permanent structure anywhere. Although it is tent, like any concrete structure the walls can be drilled to install electricity, light fixtures, surfaces, or whatever the situation calls for. CCS will be a best choice at emergency situations and when one need to erect a permanent structure in minimum time using less amount of manpower giving a good design life. 35

36. REFERENCE [1] IJFEAT- International journal for engineering applications and technology pp: 2-7 \Concrete cloth and its application. [2] Prof. K. Srinivas and Prof. Ravinder \Concrete Cloth - Its Uses and Application in Civil Engineering" NBM media (journal) may 2012 pp: 41-46 [3] International Journal on Applications in Civil and Enviornmental Engineering Volume 1: Issue 3: March 2015, pp 6-12. \Concrete cloth". [4] Study of a Honeycomb-Type Rigidied Inatable Structure for Housing Ritesh A. Khire1; Steven Van Dessel; Achille Messac; and Anoop A. Mullur [5] Feasibility of Rigidied Inatable Structures for Housing Steven Van Dessel ; Abdol R. Chini ; and Achille Messac [6] www.concretecanvas.co.uk 36