Carpenter Red Seal Exam Prep · Question
When pouring concrete in cold weather, what additive is commonly used to accelerate setting time and improve early strength?
Calcium chloride is a common accelerator used in cold weather concrete to speed up the hydration process, shorten setting time, and increase early strength, but
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Question: When pouring concrete in cold weather, what additive is commonly used to accelerate setting time and improve early strength?
Answer options: ✅ Calcium chloride.
- Fly ash.
- Air entraining agents.
- Water reducers.
Correct answer: Calcium chloride.
Explanation: Calcium chloride is a common accelerator used in cold weather concrete to speed up the hydration process, shorten setting time, and increase early strength, but its use should be controlled due to potential corrosion of rebar.
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- When interpreting a foundation plan, a dashed line with 'P. WALL' typically represents which of the following?
- A site plan shows contour lines with an interval of 0.5 m. If two adjacent contour lines are labelled 124.0 m
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- Two offset stakes are driven at 2.0 m from the proposed edge of a concrete slab. The first stake is marked 'Cu
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