Home › B.Tech Civil › civilengineering › Strength of Concrete › Per §7.6.3, the physical mechanism most often ci…
Per §7.6.3, the physical mechanism most often cited for creep deformation in concrete is:
A{'text': 'Crack propagation slowly through the coarse aggregate', 'label': 'A'}
B{'text': 'Carbonation reactions with atmospheric carbon dioxide CO2', 'label': 'B'}
C{'text': 'Loss of bond between hardened cement paste and the steel', 'label': 'C'}
D{'text': 'Movement and shear of inter-crystal absorbed gel water', 'label': 'D'}
Answer & Solution
Correct answer: D. {'text': 'Movement and shear of inter-crystal absorbed gel water', 'label': 'D'}
1. §7.6.3: 'Creep in the concrete occurs due to movement of inter crystal absorbed water due to squeezing or due to shear deformation between the crystal. On removal of load some of the driven out inter crystal water may come back but not fully hence creep deformation is not recoverable fully.'
2. Hence creep is a slow, partially-recoverable process rooted in gel water mechanics.
_Source: IGNOU ET-522 Block-2 Unit-7 Strength of Concrete, §7.6.3, p. 59_
Related questions
Per §7.6.4, the three types of shrinkage recognised in hardened-concrete deformation are:Per §7.6.3, if the creep deformation at 1 year is taken as unity, the source quotes the rePer §7.6.3, creep of concrete is best defined as the:Per §7.6.2, the modulus of elasticity of concrete typically scales approximately as which Per §7.6.1, the dynamic modulus of elasticity of concrete determined by ultrasonic-pulse /Per §7.6.1, for practical design, concrete may reasonably be treated as a linear-elastic mPer §7.6.1, in the standard determination of the Modulus of Elasticity the cylindrical conPer §7.5 (Impact Strength), impact strength of concrete relative to its compressive-streng