This set of Tough Concrete Technology Questions and Answers focuses on “Sulphur Infiltrated Concrete, FRC”.
1. Main component in this concrete is _______
a) Cement
b) Sulphur
c) Sulphur and aggregates
d) Aggregates
View Answer
Explanation: Sulphur concrete is a composite construction material, composed mainly of sulphur and aggregate (generally a coarse aggregate made of gravel or crushed rocks and a fine aggregate such as sand).
2. What is the compressive strength of this concrete?
a) 60-115 MPa
b) 10-16 MPa
c) 35-50 GPa
d) 500 GPa
View Answer
Explanation: 60-115 MPa is the compressive strength of the Sulphur concrete where as OPC has 15-60 MPa.
3. What is the bending strength of this concrete?
a) 60-115 MPa
b) 10-16 MPa
c) 35-50 GPa
d) 500 GPa
View Answer
Explanation: 10-16 MPa is the bending strength of the Sulphur Infiltered concrete where as OPC has 6-7 MPa.
4. What is the value of modulus of elasticity?
a) 60-115 MPa
b) 10-16 MPa
c) 35-50 GPa
d) 500 GPa
View Answer
Explanation: 35-60 GPa is the range of modulud of elasticity for the Sulphur infiltered concrete whereas the OPC has the range of 25-28 GPa.
5. What is the range of contraction for this concrete in mm/m?
a) .5-1
b) .6
c) <1
d) >1
View Answer
Explanation: 0.5-1 mm/m is the range of contraction for Sulphur infiltered concrete where as .6mm/m is for OPC.
6. What is the linear coefficient of thermal expansibility for this concrete in 10-6/K?
a) 8-12
b) 8-10
c) 10-15
d) 12-15
View Answer
Explanation: 8*10-6/K to 12*10-6/K is the linear coefficient of thermal expansibility for sulphur infiltered concrete where as 8*10-6/K to 10*10-6/K is for OPC.
7. What is the density for this concrete in kg/m3?
a) 2400
b) 2200
c) 2000
d) 1800
View Answer
Explanation: 2400 kg/m3 is the density for sulphur infiltered concrete 2200 kg/m3 is the density of Ordinary Portland cement.
8. _______ % is the range for porosity of this concrete.
a) 1-4
b) 5
c) 0-1
d) 9-15
View Answer
Explanation: 1 % to 4% is the range for porosity of sulphur infiltered concrete and 9% to 15 % is the range for OPC.
9. _______ % is the range for absorptivity of this concrete.
a) 1-4
b) 5
c) 0-1
d) 9-15
View Answer
Explanation: 0 % to 1% is the range for absorptivity of Sulphur in filtered concrete and 5 % is the range for OPC.
10. Diameter of Round Steel Fiber lies in the range of _______ mm.
a) .3-.5
b) .25-.75
c) .155-.41
d) .25-.90
View Answer
Explanation: Round steel fiber are commonly used and produced by cutting round wire into the short length. The diameter lies in the range of 0.25mm to 0.75mm.
11. What is the thickness of the steel fiber after silting in mm?
a) .3-.5
b) .25
c) .155-.41
d) .25-.90
View Answer
Explanation: Steel fibers having a rectangular cross section are produced by silting the sheets about 0.25mm thick.
12. What is the thickness of the flat sheet fibers after silting in mm?
a) .3-.5
b) .25
c) .15-.41
d) .25-.90
View Answer
Explanation: 0.15 mm to 0.41 mm is the thickness of the flat sheet fibers produced by silting of flat sheets.
13. What is the width of the flat sheet fibers after silting in mm?
a) .3-.5
b) .25
c) .15-.41
d) .25-.90
View Answer
Explanation: 0.25 mm to 0.90 mm is the width of the flat sheet fibers produced by silting of flat sheets.
14. Polypropylene fibers is hydrophobic in nature. True or false?
a) True
b) False
View Answer
Explanation: Polypropylene fibers is hydrophobic in nature that’s why they can be easily mixed as they do not need long time during mixing.
15. Glass fiber is made up from _______ individual filaments.
a) 100-200
b) 200-400
c) 500
d) >500
View Answer
Explanation: Glass fiber is made up from 200-400 individual filaments which are loosely bonded to make up a single stand. These stands can be chopped into various lengths, or combined to make cloth mat or tape.
Sanfoundry Global Education & Learning Series – Concrete Technology.
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