Bleed water is still visible on a freshly struck-off interior slab, but the finishing crew wants to start steel troweling to stay ahead of schedule. What should the superintendent require?
Correct Answer
A) Wait until bleed water has evaporated before final finishing begins
Finishing while bleed water remains can trap water and fines at the surface, causing scaling, dusting, or delamination; the crew should wait for bleed water to leave. Other choices: troweling water in, dusting cement, or adding hose water worsens surface quality.
Why This Is the Correct Answer
Finishing while bleed water remains can trap water and fines at the surface, causing scaling, dusting, or delamination; the crew should wait for bleed water to leave.
Why the Other Options Are Wrong
Option B: Trowel immediately to push the water back into the slab
In concrete work, Trowel immediately to push the water back into the slab is the wrong selection for Finishing timing: the option does not produce the required Finishing timing outcome, Wait until bleed water has evaporated before final finishing begins.
Option C: The superintendent should broadcast dry cement to absorb the water and continue
The trap in C is Broadcast dry cement to absorb the water and continue. That selection is wrong because it points to Broadcast dry cement to absorb the water and continue, but.
Option D: The superintendent should open hose water onto the surface to keep it workable
Choice D gives Open hose water onto the surface to keep it workable. Its specific error: it answers the Finishing timing prompt with the wrong practical move.
Memory Technique
Use the phrase "problem, control, result" for finishing timing; the result side is Wait until bleed water has evaporated before final finishing begins.
Reference Hint
Open The Contractor's Guide to Quality Concrete Construction, 4th Ed., 2018; use the index entry or section for "Finishing after bleeding" to confirm that Finishing while bleed water remains can trap water and fines at the surface, causing scaling, dusting, or delamination; the crew should wait for bleed water to leave.
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