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Which outcome occurs when improperly tensioned prestressing strands cause insufficient concrete compression?

A)Reduced shear capacity and diagonal cracking
B)Increased creep deformation under sustained load
C)Accelerated rebar corrosion by higher stress
D)Premature concrete spalling during curing

💡 Explanation

When prestressing strands are improperly tensioned, bond friction causes insufficient compressive stress counteracting tensile stresses, resulting in a reduced shear capacity that promotes diagonal cracking. Therefore, reduced shear capacity results, rather than creep, corrosion, or spalling which require different underlying weaknesses or mechanisms.

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