field study of rcc structures

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this field study was done on the basis of IS:13920 and Is 456.

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field study of rcc structures

  1. 1. FIELD STUDY OF RCCCONSTRUCTION PROJECT SANJIB DAS (CIB11019) MANJEET YADAV (CIB11040)
  2. 2. Introduction INTRODUCTIONCONSTRUCTION OF RCC STRUCTUREIMPLEMENTATION OF IS 13920:1993
  3. 3. FOUNDATIONIt is the earth that provides theultimate supporting for thestructure.
  4. 4. TYPE OF FOUNDATION SHALLOW FOUNDATION if Df/B ≤ 1DEEP FOUNDATION with Df/B greater than 1 but less than 15, aremoderately deep. Deep foundations such as pile foundationshave Df/B ratio greater than 15.
  5. 5. SOIL TESTINGIt is the scientific method todetermine the following properties:Bearing capacity of soil testPermeability testWater absorption testCore cutterBulking of sand
  6. 6. SPT (Standard Penetration Test)The standard penetration test (SPT) is an in-situdynamic penetration test designed to provideinformation on the geotechnical engineeringproperties of soil.
  7. 7. PILINGIt is a type of deep foundation distinguished from shallow foundations by the depth they are embedded into the ground.It is necessary where the soil i.e, the base of the construction site is poor where the actual construction is to done. Otherwise we can directly go for the footing of the basement
  8. 8. SUPER STRUCTURE It is generally the portion of the building located above ground, in contrast with the basement and substructure underground.Designing superstructures requires considering the pressure and force they will exert on the finished construction and balancing this to address concerns about safety and stability.The size of the superstructure is an important factor in base design, as the base of the structure must be able to support the entire laden weight
  9. 9. REINFORCEMENTSteel is used as the reinforcing material in concrete to make it good in tension. steel bars up to 12 mm in diameter are designated as bars while bars more than 12 mm in diameter are termed as rods.The four types of steel used in concrete structures as specified in cl. 5.6 of IS 456 are given below: (i) Mild steel and medium tensile steel barsconforming to IS 432 (Part 1) (ii) High yield strength deformed (HYSD) steel barsconforming to IS 1786 (iii) Hard-drawn steel wire fabric conforming to IS 1566 (iv) Structural steel conforming to Grade A of IS 2062.
  10. 10. IGNORANCE IN FIELD IS 13920FIELD SAMPLE RECOMENDATION  Both end should be bent at an angle of 135° but in this sample only one end is at 135°
  11. 11. Lap joint is absent inthis sample whichviolates IS code
  12. 12. The gap between the bars is less than 25 mm between the middle longitudinal bar.
  13. 13.  Stirrup bent is not done nor welded
  14. 14. CONCRETE Concrete consists of a rationally chosen mixture of binding material such as lime or cement, well graded fine and coarse aggregates, water and admixtures (to produce concrete with special properties).The stages of concrete production are:1. Batching or measurement of materials2. Mixing3. Transporting4. Placing5. Compacting6. Curing7. Finishing
  15. 15. COMPARISIONIN FIELD IS 456 RECOMENDATION Mixing time of concrete in  It should be atleast 2 tilt mixer was about 30- 40 minute seconds  Separate weighing box Mix design ratio was should be used for 1:1.62:2.97. The weighing batching of sand and box used to obtain this ratio gravels. was same for sand and gravels.
  16. 16. Hand made weighing box is used whichDisturb the desired mix ratio.
  17. 17. MORTAR AND BRICK WORKMortar is a workable paste used to bindconstruction blocks together and fill the gapsbetween them. The blocks may be stone,brick, cinder blocks, etc.
  18. 18. Brick should be soak in water for 1.5- 2 hour beforeusing it with mortar. But in this project the bricks werehardly soak in water for 10-20 minutes as a result brickwill absorb water from mortar reducing the bond strengthbetween mortar and bricks.
  19. 19. CONCLUSIONDue to lack of awareness of IS code and time, IS Code is not alwaysfollowed
  20. 20. THANK YOU

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