How do you ensure that quality of water is satisfactory for concrete works?
[3 marks]Explain the role of each Bogue’s compound in the process of hydration of cement.
[4 marks]Determine the fineness modulus of the coarse aggregate for which sieve result is as shown below. Sample taken = 3000 g. Sieve 80 40 20 16 10 4.75 2.36 1.18 0.6 0.3 0.15 size (mm) Weight 0 0 2622.50 349.25 28.25 0 0 0 0 0 0 retained
[7 marks]How is aggregate classified according to: (a) size, (b) shape and (c) texture?
[3 marks]What are mineral admixtures? Why are they generally used? List various mineral admixtures used with concrete.
[4 marks]In a mix design, the following results are obtained: Water = 185 kg, Fine Aggregate (FA) = 778 kg, and Coarse Aggregate (CA) = 1024 kg. If FA at site is found to contain 2% moisture and CA contains 1% moisture, determine the correct weight of Water, FA and CA.
[7 marks]What is meant by shrinkage of concrete? Briefly discuss various types of shrinkage taking place in concrete.
[7 marks]When do you recommend use of lightweight and heavy-weight aggregates?
[3 marks]What is fly ash? Explain its use as admixture in making concrete.
[4 marks]Explain the term durability of concrete and explain the factors influencing it.
[7 marks]What is compaction of concrete? Why it is necessary?
[3 marks]Write explanatory notes on pervious concrete.
[4 marks]Briefly explain the wet process of cement manufacture.
[7 marks]After designing concrete mix for first trial, how do you proceed to finalize the mix with further trial?
[3 marks]Explain the term permeability of concrete and its effect on concrete.
[4 marks]State the steps involved in designing concrete mixes as per IS:10262.
[7 marks]Explain about segregation of concrete.
[3 marks]List various precautions to be taken during underwater concreting.
[4 marks]What do you understand by creep of concrete? Discuss the factors affecting creep of concrete.
[7 marks]Explain different types of slump with sketch.
[3 marks]What is curing? Explain its importance.
[ marks]Define workability and explain various factors influencing workability.
[7 marks]Explain about grading of aggregate and its significance.
[3 marks]Explain mechanism of sulphate attack on concrete.
[4 marks]Explain the basic principle on which rebound hammer works. What are its limitations?
[7 marks]