Rr210103 Building Materials And Construction

Set No. 1

Code No: RR210103

II B.Tech I Semester Supplimentary Examinations, November 2007 BUILDING MATERIALS AND CONSTRUCTION (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) What are the qualities of good building stones? Discuss them. (b) What is the texture of rock. Enumerate its various types.

[8+8]

2. (a) Discuss the varieties of terra-cotta? (b) Write the advantages, disadvantages and uses of terra-cotta.

[8+8]

3. (a) Describe the chemical composition of cement. (b) What are the good characteristics of aggregate used in cement concrete?[8+8] 4. (a) Draw a neat cross-section of an exogenous tree and show various components of it and explain. (b) Distinguish between mild steel and hard steel.

[10+6]

5. (a) What is a raft foundation ? When and where is it preferred to other shallow foundations. Explain with a neat sketch. (b) What are floating foundations? Where are they useful? How does they differ from other foundations. [10+6] 6. (a) Discuss the advantages of modular bricks . (b) Discuss the advantages of brick masonry over stone masonry.

[8+8]

7. (a) State briefly the requirements of a good staircase. (b) How are treads & risers proportioned. (c) Where do you use the following types of stairs i. Dog-legged stair. ii. Open newel stair. iii. Geometrical stair.

[5+5+6]

8. Describe the procedure of carrying out plastering in cement mortar on new and old wall separately? [16] ⋆⋆⋆⋆⋆

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Set No. 2

Code No: RR210103

II B.Tech I Semester Supplimentary Examinations, November 2007 BUILDING MATERIALS AND CONSTRUCTION (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Give the list of explosives used in blasting and explain their composition. (b) Define natural bed of a stone and discuss its importance.

[8+8]

2. (a) What are the harmful ingredients in brick earth and explain them. (b) Explain the classification of brick earth.

[8+8]

3. (a) What is soundness of cement ? how it is determined in laboratory ? (b) What is fineness of cement ? How it is determined in laboratory?

[8+8]

4. (a) Differentiate between exogenous trees and endogenous trees. (b) Describe the properties of mild steel.

[8+8]

5. (a) Describe the various loads to be considered in designing foundations. (b) Enumerate the objects of foundations

[8+8]

6. (a) Explain some specially shaped bricks, along with their places of use (with neat sketches) (b) Explain the following with sketches i. ii. iii. iv.

Perpend. Lap. Bed. Arises.

[10+6]

7. Define roof covering? What are the various types of roof coverings commonly adopted in India? Explain them in detail. [16] 8. What is a varnish and why is it used? Classify different kinds of varnish and give brief description of each? [16] ⋆⋆⋆⋆⋆

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Set No. 3

Code No: RR210103

II B.Tech I Semester Supplimentary Examinations, November 2007 BUILDING MATERIALS AND CONSTRUCTION (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) What are the precautions to be taken in the process of blasting. (b) Write a brief note on preservation of stones.

[8+8]

2. (a) Explain different classification of bricks. (b) Write the uses of bricks.

[8+8]

3. (a) List out and explain physical properties of Portland cement. (b) Describe the effect of water cement ratio on strength and workability of concrete. [2+6+8] 4. (a) Differentiate between natural seasoning and artificial seasoning. (b) Enumerate various market forms of steel and explain any two.

[8+2+3+3]

5. (a) What is a raft foundation ? When and where is it preferred to other shallow foundations. Explain with a neat sketch. (b) What are floating foundations? Where are they useful? How does they differ from other foundations. [10+6] 6. (a) State the advantages of cavity walls. (b) Explain with the help of sketches, the details of cavity walls at the Foundation level and the Parapet level. [6+10] 7. Define roof covering? What are the various types of roof coverings commonly adopted in India? Explain them in detail. [16] 8. What preparatory work should be done before repainting of an old painted surface. [16] ⋆⋆⋆⋆⋆

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Set No. 4

Code No: RR210103

II B.Tech I Semester Supplimentary Examinations, November 2007 BUILDING MATERIALS AND CONSTRUCTION (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Write a brief note on deterioration of stones. (b) Explain wedging and blasting methods of stone Quarrying.

[8+8]

2. (a) What are the advantages, disadvantages and uses of sand-lime bricks. (b) Explain the compressive strength and water absorption tests for bricks. [6+10] 3. (a) Describe the field tests for cement. (b) Can seawater be used for making concrete? Explain.

[8+8]

4. Write short notes on: (a) Dry rot and wet rot. (b) Kiln seasoning. (c) Fire resistance of timber.

[6+5+5]

5. Differentiate between the following (a) Floating foundation and raft foundation. (b) Combined footing and strap footing. 6. Describe the following Ashlar masonry with neat sketches.

[2x8] [4x4]

(a) Ashlar rough-tooled masonry. (b) Ashlar quarry faced masonry. (c) Ashlar chamfered masonry. (d) Ashlar block-in-course masonry. 7. Explain design specifications for a staircase?

[16]

8. (a) What are the requirements of good plaster? (b) Discuss the mortars which are used for painting and plastering. ⋆⋆⋆⋆⋆

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[6+10]