Download Previous year Diploma Paper of Concrete Technology CT 4th Sem Civil/0512/Dec 2015 Paper
Concrete Technology CT 4th Sem Civil/0512/Dec 2015 Paper
                        SECTION-A
Q1. Do as directed.                                                           15×1=15
Plane cement concrete is strong in compressive.
In concrete water act as key.
Addition of Gypsum increases the setting time of cement.
Appearance of water on the surface of concrete after compaction is called Bleeding.
Round aggregate have more workability.
CaCl2 can be used as an admixture/ retarder
Grade M10 and M15 may be used for P.C.C.
One bag of cement weights 50 kg.
Hydration depends upon fineness of cement.
Curing increases the strength of concrete.                                                                                                                                                                                                                                                                                 (B) True and FalseÂ
Batching is done to increase the workability. T/F       (False)
Bulking of sand is more with fine sand. T/FÂ Â Â Â Â Â Â Â Â Â Â Â (True)
The water cement ratio should be kept constant.T/FÂ Â Â Â (False)
Fineness modulus has no unit.                       (True)
Plasticizers are water reducers.T/FÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (True)
       SECTION-B
Q2. Attempt any five questions.                                  5×6=30
What do you mean by all-in-aggregate?
What are the different types of vibrators used for the compaction of concrete?
What is the difference between screeding and floatin ?
Why construction joints are provided?
What are the limitations of water cement ratio law ?
Differentiate between polymer concrete and fly ash concrete?
What are admixtures ?
What is the importance of non-destructive test?
   SECTION-C
Q3. Attempt any three questions.                            3×10=30
   Q3. What are the various characteristics of aggregates? Discuss any six.
   Q4. Explain the properties of hardened concrete.
  Q5. What do you mean by work ability? How would you determine workability?
  Q6. What are the requirements of a warehouse? What precautions would you take while storing cement in warehouse?
  Q7. (a) Differentiate between normal & controlled concrete.
      (b) What is fiber reinforced concrete?
Section a FILL IN THE BLANKS cONCRETE TECHNOLOGY dec 2015 paper
Strength of concrete increases with time.
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Concrete hard on Drying.
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Concrete pavements are known as Ridge Pavement.  .
Admixtures increases workability.
For determining compressive strength of cement, standard sand is used.
Vicat’s Apparatus is used for determining initial and final setting time of cement.
The weight of one bag of cement is 50 KgÂ
Ready mix concrete is also called site mixed concrete
Chemical reaction between cement & water is called hydration.
Finerthe cement, more is the hydration.
b) State true or false.
Accelerators are used during hot weather concreting. T/F (False)
Curing reduces the shrinkage of concrete. T/F (True)
Height of one bag of cement is 18 cm.T/F (False)
Water cement ratio in hot weather concrete will decrease. T/F (False)
Ware house is used to store concrete.T/F (False)
Admixtures increases workability.
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For determining compressive strength of cement, standard sand is used.
Vicat’s Apparatus is used for determining initial and final setting time of cement.
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The weight of one bag of cement is 50 KgÂ
Ready mix concrete is also called site mixed concrete.
Chemical reaction between cement & water is called hydration.
Finerthe cement, more is the hydration.
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b) State true or false.
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Section B : cONCRETE TECHNOLOGY PAPER MAY 2018 PAPER
Advantages of concrete as compared to other building materialsÂ
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Properties of concrete in plastic & hardened stage.
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Functions of C2S & C3A in cement.
workability of concrete.
Importance of performing slump test
Effect of low temperature of concrete
Uses of fibre reinforced concrete.
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Section c solved concrete technology dec 2017 paper
Difference between segregation and bleeding? Discuss the factors affecting workability.
Importance of batchingÂ
Different tests on hardened concreteÂ
Mix design What is bulking of aggregate?