Concrete Technology (130605)  


Sr. Topics Teaching Hours Module Weightage
Historical background, composition of concrete, general note on strength mechanism, current practice and future trends.
Ingredients of Concrete
1. Cement- Chemical composition, hydration, heat of hydration, hydrated structure, various types of cement, testing of cement as per Indian standard. 2. Aggregates-Function in concrete, classification, effect of geometry & texture, strength, mechanical properties, moisture content, water absorption, bulking of sand, deleterious substances, sieve analysis,various grading and grading requirements, sampling & testing as per Indian Standards.3. Water- General Requirements & limiting values of impurities. 4. Admixtures- Additives and admixtures, types, need and benefits Mineral admixture - Fly ash, silica fume, blast furnace slag, and other pozzolanic materials. Chemical admixtures - Accelerator, retarder, water reducing elements, plasticizer and super-plasticizer, their functions and dosage.
Fresh concrete
Methods of mixing, transporting and placing of concrete. Workability – Definition and need, factors affecting workability, various tests as per IS ad ASTM. Segregation and bleeding, stiffening, re-tempering. Curing: necessity and various methods, microcracking.
Hardened concrete
Compressive and tensile strength and their relationship, various tests as per IS and ASTM. Factors affecting strength – water cement ratio, gel space ratio, aggregate cement ratio, properties of ingredients, effect of age, maturity, aggregate cement-paste interface, various finishes of concrete. Introduction to aspects of elasticity, shrinkage and creep. Tests for strength of concrete: Destructive, semi destructive and non- destructive tests with their limitations, test methods as per IS and ASTM.
Durability and permeability of concrete
Definitions, causes, carbonation, cracking
Concrete in aggressive environment
Alkali – aggregate reaction, sulphate attack, chloride attack, acid attack, effect of sea water, special coating for water proofing, sulphate chloride and acid attack, concrete for hot liquids.
Special Concrete
Review of behavior and characteristics of high strength concrete, high performance concrete, fiber reinforced concrete, mass concrete, light weight and heavy weight concrete, Precast concrete.
Special concreting techniques
Pumped concrete, shotcrete, underwater concrete, pre-placed concrete, vacuum dewatered concrete, hot and cold weather concreting, Ready mixed concrete.
Concrete mix design
Principles of mix proportioning, probabilistic parameters, factors governing selection of mix. Road note - 4, DOE, ACI and IS method of concrete mix design, Variability of test results, acceptance criteria, various IS code provisions.
Repair and rehabilitation
Distress in structure – causes and precautions, damage assessment of structural elements, repairing techniques and repairing materials.
Term Work
(A) Term work shall consist of tests on cement and aggregate, fresh concrete and hardened concrete. It includes destructive, partial destructive and non- destructive tests. (B) Term work shall include report on topic assigned by respective lab in-charge. (C) Term work shall include field visit and students will have to submit a report on it. (D) Oral/Practical marks include viva-voce on practical performed and submitted reports.