Previous year question paper for CT (Diploma Civil Engineering 4th)

1. Introduction: Definition of concrete, uses of concrete in comparison to other

building materials. (02 hrs)

2. Ingredients of Concrete: (06 hrs)

2.1 Cement: physical properties of cement; different types of cement as per IS

Codes

2.2 Aggregates:

2.2.1 Classification of aggregates according to size and shape

2.2.2 Characters

5. Properties of Concrete: (08 hrs)

5.1 Properties in plastic state: Workability, Segregation, Bleeding and

Harshness

5.2 Properties in hardened state: Strength, Durability, Impermeability,

Dimensional changes;

6. Proportioning for Normal Concrete: (04 hrs)

6.1 Objectives of mix design, introduction to various grades as per IS:456- 2000; proportioning for nominal mix design as prescribed by IS 456-2000

6.2 Adjustment on site for: Bulking of fine aggregate, water absorption of

aggregate, workability

6.3 Difference between nominal and controlled concrete

6.4. Introduction to IS-10262-2009-Code for controlled mix design

7. Introduction to Admixtures (chemicals and minerals) for improving performance

of concrete (03 hrs)

8. Special Concretes (only features) (06 hrs)

8.1 Concreting under special conditions, difficulties and precautions before,

during and after concreting

8.1.1 Cold weather concreting

8.1.2 Under water concreting

8.1.3 Hot weather concreting

8.2 Ready mix concrete

8.3 Fibre reinforced concrete

8.4 Polymer Concrete

8.5 Fly ash concrete

8.6 Silica fume concrete

9. Concreting Operations: (12 hrs)

**9.1 Storing of Cement:

9.1.1 Storing of cement in a warehouse

9.1.2 Storing of cement at site

9.1.3 Effect of storage on strength of cement

9.1.4 Determination of warehouse capacity for storage of Cement

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**9.2 Storing of Aggregate: Storing of aggregate at site

9.3 Batching (to be shown during site visit )

9.3.1 Batching of Cement

9.3.2 Batching of aggregate by:

9.3.2.1 Volume, using gauge box (farma) selection of proper gauge

box

9.3.2.2 Weight spring balances and batching machines

9.3.3 Measurement of water

** 9.4 Mixing:

9.4.1 Hand mixing

9.4.2 Machine mixing - types of mixers, capacities of mixers, choosing

appropriate size of mixers, operation of mixers

9.4.3 Maintenance and care of machines

**9.5 Transportation of concrete: Transportation of concrete using: wheel

barrows, transit mixers, chutes, belt conveyors, pumps, tower crane and

hoists etc.

9.6 Placement of concrete:

Checking of form work, shuttering and precautions to be taken during

placement

** 9.7 Compaction:

9.7.1 Hand compaction

9.7.2 Machine compaction - types of vibrators, internal screed vibrators

and form vibrators

9.7.3 Selection of suitable vibrators for different situations

9.8 Finishing concrete slabs - screeding, floating and trowelling

9.9 Curing:

9.9.1 Objectives of curing, methods of curing like ponding, membrane

curing, steam curing, chemical curing

9.9.2 Duration for curing and removal of form work

9.10 Jointing: Location of construction joints, treatment of construction joints,

expansion joints in buildings - their importance and location

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9.11 Defects in concrete: Identification of and methods of repair

10. Importance and methods of non-destructive tests (introduction only) (01 hr)