alleryStart learning →Per §7.6.3, if the creep deformation at 1 year is taken as unity, the source quotes the relative creep at 30 years as approximately:
AAbout 1.05
BAbout 4.50
CAbout 1.36
DAbout 10.00
Answer & Solution
Correct answer: C. About 1.36
1. §7.6.3 lists creep ratios: 1.14 at 2 years, 1.20 at 5 years, 1.26 at 10 years, 1.33 at 20 years and 1.36 at 30 years (with 1.0 at 1 year).
2. Creep flattens with age because the gel becomes denser and the matrix retains less inter-crystal water for shear.
_Source: IGNOU ET-522 Block-2 Unit-7 Strength of Concrete, §7.6.3, p. 60_
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