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of Questions : 6]
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SEAT No. :
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P5106 [Total No. of Pages : 4
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BE/Insem.-506
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B.E. (Civil Engineering)
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(c) ADVANCED CONCRETE TECHNOLOGY
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(2012 Pattern) (Elective - I) (Semester - I) 13
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Time : 1 Hour] [Max. Marks : 30
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Instructions to the candidates:
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1) Answer Q.1 or 2, 3 or 4 and 5 or 6.
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2) Neat diagrams must be drawn wherever necessary.
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3) Figures to the right indicate full marks.
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4) Your answers will be valued as a whole.
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5) Use of electronic pocket calculator is allowed.
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6) Assume suitable data, if necessary.
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7) Use of IS code 10262,456 is not allowed.
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Q1) a) Write a short note on manufactured sand as a fine aggregate. [4]
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b) What do you mean by quality assurance and quality control? Give the IS
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recommendations of quality assurance. [6]
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Q2) a) What is heat of hydration? Explain the factors affecting heat of hydration.
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[4]
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b) Explain workability as a quality measure of green concrete . On which
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factors workability of concrete depends? [6]
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Q3) a) What is light weight concrete? How it can be achieved in practice? [4]
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b) Write a short notes on : [6]
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i) High strength concrete
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ii) High performance concrete
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Q4) a) What are the different types of industrial waste materials useful for
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construction industry? Explain any one waste material based concrete in
detail. [4]
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b) Write a short notes on : [6]
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i) Jet cement concrete (Ultra rapid hardening concrete)
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ii) Vacuum concrete.
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Q5) Using Indian Standard recommended guidelines, design a concrete mix for a
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reinforced concrete structure to be subjected to the very severe exposure
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conditions for the following requirements : [10]
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A) Stipulations for proportioning
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a) Grade designation : M35,
b) Standard deviation, s = 5
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c) Type of cement : OPC 53 grade conforming to IS 8112
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d) Maximum water-cement ratio : 0.45
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e) Workability : 75 mm(slump)
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f) Degree of supervision : Good
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g) Type of aggregate : Crushed Angular aggregate,
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h) Maximum cement content : 450 kg/m3
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i) Minimum Cement content : 340 kg/m3
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j) Method of concrete placing Pumping
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k) Chemical admixture type : Super plasticizer
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B) Test data for materials
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a) Specific gravity of cement : 3.15
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b) Specific gravity of admixture : 1.145
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c) Specific gravity of
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i) Coarse aggregate - 2.74
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ii) Fine aggregate - 2.74
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d) Water absorption
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i) Coarse aggregates - 0.5%
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ii) Fine aggregates - 1.00%
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e) Free surface moisture
i) Coarse aggregates - Nil(absorbed moisture also nil)
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ii) Fine aggregates - Nil
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f) Sieve analysis
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i) Coarse aggregate :
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IS Sieve Analysis of Percentage of Remark
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sizes (mm) Coarse different
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Aggregate Fractions
Fraction
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I II I II Combined Confirming
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(60%) (40%) (100%) of Table 2
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20 100 100 60 40 100 of IS 383
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10 0 71.2 0 28.5 28.5
4.75 9.40 3.7 3.7
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ii) Fine aggregate : Conforming to grading zone I
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C) Design considerations :
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Table 1 : From IS 10262; Maximum water content per cubic meter
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of concrete
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Sr. No. Nominal Maximum Maximum Water
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Size of Aggregate (mm) Content (kg)
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ii) 20 186
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iii) 40 165
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Table 2 : From IS 10262; Volume of Coarse Aggregate per Unit
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Volume of Total Aggregate
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SI. Nominal Volume of Coarse Aggregate Per
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No. Maximum Size of Unit Volume of Total Aggregate
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Aggregate (mm) for Different Zones of Fine
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(1) (2) Aggregate
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Zone Zone Zone Zone
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IV III II I
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i) 10 0.50 0.48 0.46 0.44
ii) 20 0.66 0.64 0.62 0.60
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iii) 40 0.75 0.73 0.71 0.69
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OR
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Q6) a) Write a short note on ground penetration radar technique. [4]
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b) Write a short notes on non destructive testing methods. [6]
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i) Stress wave propagation method
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ii) Nuclear method.
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