5 CE 6.2A: ADVANCED CONCRETE TECHNOLOGY (L- 3)
  Units    Contents of the subjects
I
Concrete Production: Difference in mix proportioning for vibrator compacted concrete, pumpable and roller compacted concrete. Considerations in a plant operations in ready mixed concrete (RMC). Different types of mixers, transportation systems and pumps in RMC.
Rheology of Concrete: Flow ability, Segregation, Bleeding and Viscosity etc. ‐ Factors affecting, related standards including slump flow test, v funnel test, U box test, J Ring test, Stability test, L Box test, rheometer test etc.
II

Mineral and Chemical admixtures in Concrete:
Chemical: Applications of accelerators, importance of chloride free admixtures, Typical dosages and applications, Case studies of use in tunnels. Application of Retarders, particularly in RMC applications.
High range water reducing admixtures: Naphthalene and melamine based, PCE based. Principle of working. Application procedure, Shelf life, Outline of different commercial types available in Indian market (more than 10).

Mineral : Flyash : Basic properties, IS 3812 specifications for use in cement and concrete. Properties of typical flyashes available in the country.Graded flyash, Pozzocrete and its application

Ground Granulated Blast Furnace Slag (GGBFS):Basic properties, Indian standards, Applications. Ultra fine powders: Micro Silica, Metakaolin, Limestone, Calcium carbonate powders etc: Basic properties, role in cement concrete and pplications.
III

Strength of Concrete: Strength‐ porosity relationship, factors affecting compressive strength, behaviour of concrete under uniaxial, biaxial and triaxial stress states, Split Tensile strength and modulus of rupture ‐test methods and empirical formulae for their estimation as per ACI manual of concrete practice and Indian standards. Elasticity, Creep and Shrinkage of Concrete: Elastic behaviour, Method of determination of Elastic modulus, factors affecting modulus of elasticity, early volume change in concrete due to plastic shrinkage, autogeneous shrinkage and drying shrinkage‐ factors affecting them, typical values and their methods of determination.
Creep of concrete‐ specific creep, typical values, creep recovery, factors affecting creep and its determination with ASTM procedure.
IV

Microstructure of Concrete: Interfacial transition zone, hydration kinetics, hydrated cement paste (hcp), ettringite, calcium hydroxide, presence of micro‐cracks in concrete mass ‐ their characteristics and significance on performance of concrete,

Penetrability of Concrete: Permeability, sorptivity and diffusion in concrete‐ test methods and significance. Durability of Concrete: Physical and chemical processes, recently employed methods of tests for ensuring longer and durable concrete structures like Resistivity, RCPT, etc‐ case studies
involving decision based on rapid chloride permeability test (RCPT), DIN permeability, etc
V
Special Aggregates: Light weight, heavy weight‐ their characteristics and uses in concrete. Specific purpose concretes and cement based composites: Self Compacting Concrete : Mix proportioning, EFNARC guidelines. Fiber cements and fiber reinforced cement based composites, mass concrete and polymer concrete etc.‐ materials, production and application areas.
High performance concrete‐ performance characteristics in fresh and hardened states, production precautions ‐ case studies of use of HPC in India: Delhi Metro construction, Mumbai – Worli Sea link project, atomic power projects, Hydro electric power projects etc. Nano Technology in Cement and Concrete: Use of nano silica, CNTs and other nano materials.

 

Suggested Readings:

1.Properties of Concrete by A.M. Neville, Longman Publishers.
2- Concrete Technology by M.S. Shetty, Dahnpat Rai & Sons.
3- Concrete Technology by Nevillee & Brooks, Pearson Education.
4- Concrete Microstructure P.K. Metha, Tata Mc Graw Hill.
5. Concrete Technology- A. S. Santhakumar, Oxford University Press