What is a key goal of proper consolidation near rebar?

• A. Consolidate without displacing the rebar.
• B. Fill voids behind bars.
• C. Create maximum surface roughness near bars.
• D. Prevent any paste from reaching bars.

Answer: (A)

Consolidation around rebar is about packing the concrete so that it completely surrounds the bars without moving them. If the consolidation causes the rebar to shift, you can create gaps and weak bond between the steel and concrete, which undermines strength and durability. The best choice emphasizes keeping the rebar in place while the surrounding concrete is compacted, ensuring full encasement and a good bond.

Filling voids around the bars is important, but it’s a consequence of proper consolidation rather than the defining goal. Creating maximum surface roughness isn’t the primary aim of consolidation, and keeping paste away from the bars would prevent the necessary bond between concrete and steel.