09A50101 Concrete Technology B.Tech Question Paper : sphoorthyengg.com
Name of the College : Sphoorthy Engineering College
University : JNTUH
Department : CIVIL ENGINEERING
Subject Code/Name : 09A50101/DESIGN OF REINFORCED CONCRETE STRUCTURES
Degree : B.Tech
Year/Sem : III/I
Website : sphoorthyengg.com
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/sphoorthyengg.com/4863-09A50101-CONCRETETECHNOLOGY.pdf
Concrete Technology Question Paper :
III B.Tech I Semester Examinations,December 2011
Time: 3 hours
Max Marks: 75
Related : Sphoorthy Engineering College 09A50104 Geotechnical Engineering-I B.Tech Question Paper : www.pdfquestion.in/4855.html
Answer any FIVE Questions :
All Questions carry equal marks :
1. (a) Explain in detail the compressive strength test on cement.
(b) Explain the role of C3S and C3A on the properties of cement. [7+8]
2. Discuss in detail about new generation super plasticizers. [15]
3. Explain in detail how initial tangent modulus is determined in the laboratory. [15]
4. (a) What is the eect of vibration on the strength and durability of concrete?
(b) Explain dierent types of vibrators. [8+7]
5. Design M 35grade concrete mix for the following data using BIS method: [15]
CA: 16mm crushed granite
FA: River sand confirming to zone III
Workability : medium
Quality control : medium
Exposure : Moderate
Cement : OPC 53 grade
Specific gravity :convert : 2.99; FA: 2.65; CA: 2.55
Water absorption by CA : 3 %
Free surface moisture in FA: 3%
Bulky of FA: 10%
6. (a) Explain how aggregate impact value is determined and its range.
(b) Explain the bulking phenomenon of fine aggregate and its eect. [8+7]
7. (a) Explain the factors aecting the strength of hardened concrete.
(b) Estimate the strength of concrete at 21 days using maturity concept for M30Grade cement cured at 100C for 4 hours and 160C for 8 hours and 200C for the rest of the period? Ploughmans coecients are A:21; B:61. [8+7]
8. Explain in detail about High strength and high performance concretes. [15]
Code No: 09A50101
R09 Set No. 4
1. (a) Explain about the durability of concrete.
(b) How do you convert to mix proportion by weight into volumetric proportion? [8+7]
2. (a) Define workability of fresh concrete.
(b) Explain the factors aecting workability of concrete. [7+8]
3. (a) Explain the method of determining the specific gravity of fine aggregate.
(b) Explain classification of aggregates. [7+8]
4. (a) How does the drying shrinkage eect creep? Explain in detail.
(b) Explain about carbonation and shrinkage and its eects. [7+8]
5. (a) What is the role of special concretes in the modern construction industry? Discuss.
(b) Dierentiate between High strength and high performance concretes. [7+8]
6. (a) With reference to the mineral composition, explain the role of yash and silica fume in the hydration of cement.
(b) Explain about air – entraining admixtures. [8+7]
7. Estimate the strength of concrete using Abraim’s law and Gel/Space law at 28 days for 750 grams of cement with 0.3;0.5; 0.65; water/cement ratios on full and 60 percent hydration? [15]
8. For a given cement C3S = 55%, C2S = 15%, C3A = w%, C4 AF = 12% Others=8 15]
III B.Tech I Semester Examinations,December 2011 :
Concrete Technology :
1. What are chemical admixtures? Explain dierent types of admixtures. [15]
2. (a) Explain the relation between compressive and tensile strengths of concrete.
(b) Explain steam curing at atmospheric pressure and high high pressure. [7+8]
3. (a) Explain the method of determining aggregate impact value.
(b) Explain specic gravity test on ne aggregate. [7+8]
4. (a) How durability is taken care in the BIS method of mix design? Explain.
(b) Discuss about various parameters to be considered in designing a durable concrete mix. [8+7]
5. (a) Explain the role of light weight concretes in structures.
(b) What is no nes concrete? What are its advantages? [8+7]
6. (a) Explain dierent types of static modulus of concrete.
(b) Explain about carbonation and shrinkage of concrete. [7+8]
7. (a) Explain Bogues compounds? Given the chemical composition of cement, how the Bogues compounds are calculated?
(b) Explain heat of hydration of dierent Bogues compounds? [7+8]
8. (a) Explain how setting times of fresh concrete are determined.
(b) Explain slump test on fresh concrete. [8+7]
III B.Tech I Semester Examinations,December 2011 :
Concrete Technology :
1. (a) Explain the relation between tensile and compressive strengths of concrete.
(b) Explain the split tension tests on cylinders and cubes with neat sketches.[8+7]
2. (a) Explain the soundness test using Lechatelier’s equipment.
(b) Discuss about heat of hydration of cement. [7+8]
3. (a) Explain various deleterious material in aggregates and their limits.
(b) Explain the method of determining aggregate crushing value of coarse Aggre- gate.