Which statement describes overworking concrete?

Which statement describes overworking concrete?

• A. Too much water and fine material to the surface
• B. Imbedding aggregate
• C. Concrete begins to crack
• D. Air bubbles produce in concrete

Answer: (A)

Overworking concrete means finishing the surface too much or too soon, which disturbs the mix while water is still bleeding to the surface. This pushes excess water and fine cement paste to the top, creating a thin, weak, dusty layer that can scale or dust later. That is why the description of too much water and fine material surfacing is the best match for overworking. The other statements describe different issues: embedding aggregate isn’t the defining problem of overworking, cracking can result from several causes and isn’t the specific symptom described here, and air bubbles come from mixing or vibration, not the finishing habit.

Overworking concrete means finishing the surface too much or too soon, which disturbs the mix while water is still bleeding to the surface. This pushes excess water and fine cement paste to the top, creating a thin, weak, dusty layer that can scale or dust later. That is why the description of too much water and fine material surfacing is the best match for overworking. The other statements describe different issues: embedding aggregate isn’t the defining problem of overworking, cracking can result from several causes and isn’t the specific symptom described here, and air bubbles come from mixing or vibration, not the finishing habit.