Concrete Technology important questionsMost repeated in SPPU papers
These 18 questions appeared in more than one SPPU Concrete Technology paper we have: 5 papers, from Mar 2024 to Mar 2026. The most-asked come first. Each one links to the papers it was asked in.
Repeated questions
Endsem questions (16)
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Using Indian Standard recommended guidelines, design a concrete mixfor a reinforced concrete structure to be subjected to the mild exposure conditions for the following requirements: A) Stipulations for proportioning i) Grade designation: M30 ii) Standard deviation, s = 5 iii) Type of cement: OPC 53 grade conforming to IS 8112 iv) Workability : 75 mm (slump) v) Degree of supervision: Good vi) Exposure condition: Moderate vii) Type of aggregate: Angular coarse 20 mm aggregate, viii) Minimum and maximum cement content 300 kg/m3and 450 kg/m 3 respectively B) Test data for materials i) Specific gravity of cement: 3.15 ii) Specific gravity of: (I) Coarse aggregate - 2.74 (II) Fine aggregates - 2.74 iii) Water absorption: (I) Coarse aggregates - 0.5 % (II) Fine aggregates - 1.00 % iv) Free surface moisture : (I) Coarse aggregates - Nil (absorbed moisturealso nil) (II) Fine aggregates - Nil v) Sieve analysis (I) Coarse aggregate : IS Analysis of Percentage of different Remarks Sieve coarse fractions sizes in aggregate mm fraction I II I II Combined (60%) (40%) (100%) Confirming of table 2 20 100 100 60 40 100 of IS 383 10 0 71.2 0 28.5 28.5 4.75 9.40 3.7 3.7 2.36 0 (II) Fine aggreatate : Conforming to grading zone I (III) Design considerations : Table 1: From IS 10262: Maximum water content per cubic meter ofconcrete : Sr. Nominal Maximum Size of Maximum water No. aggregate in mm content in kg 1 10 208 2 20 186 3 30 165 Table 2: From IS 10262; Volume of Coarse Aggregate per UnitVolume of Total Aggregate: Sr.No Nominal Volume of coarse aggregate per unit volume Maximum size of of total aggregate for differentzone of fine aggregate in mm aggregate Zone I Zone II Zone III Zone IV 1 10 0.50 0.48 0.46 0.44 2 20 0.66 0.64 0.62 0.60 3 30 0.75 0.73 0.71 0.69 Table 3: From IS 456, Different Exposure conditions for reinforcedconcrete Exposure Minimum cement Maximum Minimum content (kg/m 3 ) water cement grade of ratio concrete Mild 300 0.55 M20 Moderate 300 0.50 M25 Severe 320 0.45 M30 Very Severe 340 0.45 M35 Extreme 340 0.40 M40
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Insem questions (2)
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Questions count as repeated when their wording matches closely across papers. Numericals that depend on a figure are left out, since the figure changes from paper to paper.