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Eighth Semester B.E. Degree Examination, Dec.2015

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Time: 3 hrs.

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Design a concrete mix of M30 grade of concrete for the following data: Design parameters: Max size of aggregate - 20 mm Coarse aggregate - 20 mm and 12.5 mm mixed in the ratio of 60:40 Shape of coarse aggregate - Angular Degree of workability - 0.85 Degree of quality,pontrol - Fair Degree of exposure - Severe Cement - OPC 53 Grade Specific gravity of cement - 3.15 Specific gravity of Fine aggregate - 2.6 Specific gravity of coarse aggregate Free Surfagb moisture: Coarse Aggregate - Nil Fine Aggregate - 2oh Watqr Absorption: Coarse Aggregate - 0.5% Fine Aggre gate - l.0o/o Entrapped Ai - 2%

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Explain in brief various types and causes of cracks in concrete. (10 Marks) Discuss in brief the mechanism of chloride induced corrosion of steel and its control.

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What is the role of chemical admixtures in concrete and its mechanisms? Mention four tlpes of chemical admixtures and its functions. (10 Marks) Explain the mechanism by which mineral admixtures are able to improve the durability, pumpability and finishability of concrete mixtures. Name some of the pozzolanic admixtures used in concrete. (10 Marks)

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problems of the cement? (10 Marks) Discuss the physical-chemical characteristics of the C-S-H and Calcium Hydroxide in a well hydrated cement paste. How many types of voids and water are associated with saturated cement paste? (10 Marks)

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PART _ A Explain the four major components of Portland cement contributes the strength development. Which compounds are responsible for rapid stiffbning and early settling

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Answer any FIVE full questions, selecting atleust TWO qaestions from each part. 2. Use of 1540262-2009 code is permitted.

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Advanced Goncrete Technology

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(RMC) High Volume Flyash Concrete (HVFC) Ready Mixed Concrete

(05 Marks) (05 Marks)

Define self compacting concrete (SCC) and its benefits & requirements/ characteristics. (10 Marks)

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10cv81

a.

What are the factors affecting the properties of fiber reinforced concrete (FRC) and its

b.

Explain briefly "Ferrocement" casting techniques and its

a. b. c.

Explain in brief following types of concrete with respect to properties, method of pfdifu"btion and its application: (06 Marks) Structural light weight concrete (06 Marks) High Density concrete (08 Marks) High perfoffnance concrete

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(06 Marks) What are the factors influencing the strength of concrete? How to determine flexural strength of concrete under three-poiht Mding method? (06 Marks) What are the factors affecting the measurement of pulse v,.glo-city with respect to properties (08 Marks) of concrete?

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Advanced Concrete Technology Jan 2016 (2010 Scheme).pdf ...

Page 1 of 2. USN 10cv81. Eighth Semester B.E. Degree Examination, Dec.2015 I J an.20l6. Advanced Goncrete Technology. Time: 3 hrs. Max. Marks:100.

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