RCC and Structural Codes Quiz

Study Notes

IS 456:2000 outlines practices for plain and reinforced concrete.
IS 800:2007 and IS 800:1984 define limit state method (LSM) and working stress method (WSM) for steel structure design, respectively.
IS 875:1987 provides criteria for load calculations, including:
- Part I: Dead load
- Part II: Imposed load
- Part III: Wind load
- Part IV: Snow loads
- Part V: Special load & load combinations.
IS 1343:1980 focuses on prestressed concrete design.
IS 1893:2002 sets standards for earthquake-resistant structures.
IS 3370:1965 addresses concrete structures for liquid storage.
IS 10262:2009 is a guideline for concrete mix proportioning.
IS 13920:1993 relates to ductile detailing of concrete under seismic forces.
SP 6 (1):1964 is a handbook for structural engineers with practical insights.
SP 16:1980 aids reinforced concrete design per IS 456:2000.
SP 23:1982 offers guidance on concrete mixes.
SP 24:1983 serves as an explanatory handbook for IS 456:2000.
SP 34:1987 focuses on concrete reinforcement and detailing work.

Contains 5 sections and 8 annexures. Key sections are:
- Section 2: Material, Workmanship, Inspection, and Testing, which covers essential materials like cement, aggregates, water, and admixtures.

Cement: A critical binding material in concrete.
Aggregates: Essential for concrete mix, varying in size and type.
Water: Vital for hydration of cement.
Admixtures: Include:
- Mineral admixtures like fly ash, silica fume, and rice husk ash.
- Chemical admixtures, for example:
  - Accelerators (calcium chloride, fluosilicate).
  - Retarders (sodium tartrate, tartaric acid).
  - Water-reducing agents (calcium lignosulphate).
Reinforcement: Steel bars or mesh used to increase concrete tensile strength.

Strength:
- Characteristic compressive strength (fck) is the value below which 5% of test results are expected to fail.
- Mean strength reflects the average, where 50% of the results are expected to pass.
Young's Modulus of Elasticity: Defined by IS 456:2000; measures the stiffness of concrete.
Creep and Shrinkage: Affects long-term strength and performance of concrete.

Measured by various tests to assess its ease of placement:
- Compaction Factor Test: Suitable for low workability.
- Slump Test: Commonly used, varies from 25mm to 150mm.
- Vee Bee Test: Assesses workability at high levels.
- Flow Test: Measures very fluid concrete characteristics.

Slump ranges for different applications:
- Concrete for road works: 20-28 mm.
- Ordinary RCC works: 50-100 mm.
- Columns and retaining walls: 12-25 mm.
- Mass concrete: 75-175 mm.
Correlation between slump values and compacting factors:
- 0-25 mm slump: 0.78-0.80 compacting factor.
- 25-75 mm slump: 0.85-0.87 compacting factor.
- 50-100 mm slump: 0.92-0.935 compacting factor.
- 100-150 mm slump: 0.95-0.96 compacting factor.