VTU Civil Engineering (Semester 8)
Advanced Concrete Technology
June 2014
Total marks: --
Total time: --
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) Enumerate the importance of Bogue's compounds in ordinary port land cement.
7 M
1 (b) Explain the rheology of concrete in terms of Binghan's parameter.
7 M
1 (c) Determine capillary porosity, total porosity and gel space ratio for a cement paste with W/C ratio 0.5 and degree of hydration 90%.
6 M

2 (a) Explain the mechanism of 'deflocculation' of cement particles by super plasticizers with neat sketches.
10 M
2 (b) What is optimum dosage of super plasticizer? How do you determine the optimum dosage of super plasticizer?
6 M
2 (c) Explain the effect of fly ash on hardened state of concrete.
4 M

3 (a) Explain the factors affecting the mix design of concrete.
6 M
3 (b) Using Indian standard code M20 grade method of mix design, arrive to a mix proportion for the following data [M20 grade]
maximum size of aggregate = 20 mm
Degree of workability = 0.90 compactor factor
Degree of quality control = good
Type of exposure = mild
Specific gravity of cement = 3.15
Specific gravity of coarse aggregate = 2.65
Specific gravity of fine aggregate = 2.60
Water absorption coarse aggregate = 0.5%
Water absorption fine aggregate= 1.0%
Free surface moisture coarse aggregate = Nil
Free surface moisture fine aggregate = 2.0%.
Coarse aggregate percentage of different friction 60%:40%.
Fine agrregate belongs to zone II.
14 M

4 (a) Discuss permeability of concrete.
6 M
4 (b) Discuss in brief alkali aggregate reaction. What precautions are necessary to minimize, the same?
6 M
4 (c) Explain corrosion in reinforcement concrete.
8 M

5 (a) What ir RMC? Explain briefly advantages of RMC.
6 M
5 (b) Explain shot crete and under water concreting.
8 M
5 (c) Mention the need for self compacting concrete. Mention its properties. What are different test methods for determining the rheology of SCC?
6 M

6 (a) What are the factors affecting properties of fibre reinforced concrete. List the various applications of fibre reinforced concrete.
8 M
6 (b) What are the different types of fibres used in concrete?
6 M
6 (c) What is Ferro-cement? List the various applications of Ferro cement.
6 M

Write short notes on:
7 (a) (i) Light weight concrete
5 M
7 (a) (ii) High density concrete
5 M
7 (b) Discuss in brief the properties of high performance concrete in fresh and hardened state.
10 M

Explain the following:
8 (a) Tests of hardened concrete.
8 M
8 (b) Rebound Hammer Test (NDT)
6 M
8 (c) Pulse velocity test (NDT)
6 M

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