STUPIDSID
1 (a)
What are the various laboratory tests conducted on cement?
5 M
1 (b)
Explain the importance of conducting the soundness test on cement and the procedure of conducting the soundness test.
10 M
1 (c)
Explain with the flow chart the manufacture of cement by wet process.
5 M
2 (a)
Explain the importance of shape and texture of aggregate used in concrete.
10 M
2 (b)
Which are various tests conducted on coarse aggregates for determining its strength?
5 M
2 (c)
Explain bulking of aggregates.
5 M
3 (a)
What is an admixture? What is the effect of air entrainment on the properties of concrete?
12 M
3 (b)
Write short notes on accelerators and retarders.
8 M
4 (a)
Define workability and list the factors affecting workability.
8 M
4 (b)
List the various tests to measure workability and explain KEE BEE consistometer test.
12 M
5 (a)
What are factors affecting the strength of concrete?
4 M
5 (b)
Explain the accelerated curing test on concrete cubes.
8 M
5 (c)
Write short notes on Bond strength of concrete.
8 M
6 (a)
Explain briefly the factors affecting modulus of elasticity of concrete.
10 M
6 (b)
Discuss the factors affecting creep.
10 M
7 (a)
Explain the different methods of controlling sulphate attack on concrete.
10 M
7 (b)
Discuss the durability of concrete in sea water.
10 M
8
Design a concrete mix by IS method for M30 grade concrete as per IS 10262-2009.
a) Grade: M30
b) Cement: OPC-43 Grade
c) Maximum Nominal size of aggregate: 20mm
d) Minimize cement content: 320 Kg/m3
e) Max, w/c Ratio: 0.45
f) Workability: 100mm slump
g) Exposure condition: Severe (Reinforced concrete)
h) Method of concrete placing: pumping
i) Degree of super vision: Good
j) Type of aggregate: Crushed Angular
k) Max. Cement content: 450 K'g/m3
l) Chemical admixture: Super plasticizer
Test Data for materials:
i) Specific Gravity of cement: 3.15
ii) Specific Gravity of C.A. :2.74
iii) Specific Gravity of F.A.: 2.74
iv) Water Absorption for
1) C.A.: 0.5%
2) F.A: 1.0%
v) Free surface moisture
1) C.A.: NIL (Absorbed moistrure also NIL)
2) F.A.: NIL
vi) Fine Aggregate conforms to grading zone-I
1) of table 4 of IS 383
2) Coarse Aggregate
a) Grade: M30
b) Cement: OPC-43 Grade
c) Maximum Nominal size of aggregate: 20mm
d) Minimize cement content: 320 Kg/m3
e) Max, w/c Ratio: 0.45
f) Workability: 100mm slump
g) Exposure condition: Severe (Reinforced concrete)
h) Method of concrete placing: pumping
i) Degree of super vision: Good
j) Type of aggregate: Crushed Angular
k) Max. Cement content: 450 K'g/m3
l) Chemical admixture: Super plasticizer
Test Data for materials:
i) Specific Gravity of cement: 3.15
ii) Specific Gravity of C.A. :2.74
iii) Specific Gravity of F.A.: 2.74
iv) Water Absorption for
1) C.A.: 0.5%
2) F.A: 1.0%
v) Free surface moisture
1) C.A.: NIL (Absorbed moistrure also NIL)
2) F.A.: NIL
vi) Fine Aggregate conforms to grading zone-I
1) of table 4 of IS 383
2) Coarse Aggregate
| IS sieve size (mm) | Analysis of coarse Aggregate fraction | % of different Fraction | Remark | |||
| I | II |
I 60% |
II 40% |
Combined 100% |
||
|
20 10 4.75 2.36 |
100 0
|
100 71.20 2.40 0 |
60 0
|
40 28.5 3.7
|
100 28.5 3.7
|
Conforming To Table 2 of IS 383
|
10 M
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