STUPIDSID
1 (a)
Clearly mention the four Bogue equations used for estimating potential compound composition of Portland cement. Also mention the two basic assumptions made while developing Bogue equations. Mention ts importance.
8 M
1 (b)
Write note on interfacial transition zone in concrete.
4 M
1 (c)
Draw typical stress-strain curves for concrete under:
i) Biaxial compression
ii) Combined compression and tension
iii) Biaxial tension, and mark salient points.
i) Biaxial compression
ii) Combined compression and tension
iii) Biaxial tension, and mark salient points.
8 M
2 (a)
What are plasticizers? Mention the types of plasticizers. Write brief note on electro chemical activity of super plasticizers.
10 M
2 (b)
With sketch explain the activity of air-entraining agents.
5 M
2 (c)
What are mineral admiztures? Explain briefly the role of i) metakaoline ii) silica fume and iii) fly ash as mineral admixtures.
5 M
3 (a)
Explain briefly the steps in involved in concrete mix design as per Bureau of Indian standards.
10 M
Calculate:
3 (b) (i)
Water-cement ratio to achieve fck=20 N/mm2 at 28 days assuming 30 samples with standard deviation 4.6 for 43 grade cement.
5 M
3 (b) (ii)
Target strength if standard deviation i 5, for fck = 20 N/mm2.
5 M
3 (c)
Mention the relation used for calculating volume of sand and coarse aggregate as per Indian standards, by absolute volume method.
5 M
4 (a)
Explain briefly thermal diffusivity and thermal conductivity.
5 M
4 (b)
Mention the Alkali's Silica reaction. What circumstances are required for the Alkali's Silica reaction (ASR) to take place?
5 M
4 (c)
Mention the three parameters included in the concrete work specification to ensure required impermeability of concrete.
3 M
4 (d)
Define: i) Durability ii) Specific heat iii) Efforescence.
7 M
5 (a)
Sketch a typical layout of the site for RMC plant with auxiliary. Explain any two of the auxiliary in brief.
12 M
5 (b)
Mention the various tests performed to check the properties of fresh self-compacting concrete (SCC). Explain any one of them briefly, with sketches.
8 M
6 (a)
Explain briefly the behaviour of fibre reinforced concrete under:
i) Tension ii) Compression iii) Flexure.
i) Tension ii) Compression iii) Flexure.
12 M
6 (b)
What is Ferro concrete? Mention its properties with application in civil engineering field.
8 M
7 (a)
Write a brief note on proportioning of light weight concrete.
4 M
7 (b)
Explain briefly the salient high performance requirements to produce high performance concrete.
4 M
7 (c)
What is high density concrete? Mention its properties and any four important applications.
12 M
Write short notes on:
8 (a)
Pulse velocity method.
5 M
8 (b)
Rheology of concrete
5 M
8 (c)
Post and pre-cracking FRC beams
5 M
8 (d)
Marsh cone test.
5 M
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