Which surface outcome is expected specifically when the new slab bleeds during placement and is connected to an existing slab?

Prepare for the CSLB Concrete C-8 License 2 Exam. Use flashcards and multiple choice questions, each with hints and explanations. Get ready for your concrete licensing exam today!

Multiple Choice

Which surface outcome is expected specifically when the new slab bleeds during placement and is connected to an existing slab?

Explanation:
When the new slab bleeds, water rises to the surface and can create a laitance layer, leaving a weaker, more plastic surface. If this fresh slab is connected to an existing slab, movement is restrained as both pours cure, while they shrink at different rates. That restraint combined with the weaker surface promotes tensile stresses at the top, which express as cracks. So the surface is expected to crack, especially near the joint where the two slabs meet, rather than smoothing out or maintaining a uniform color.

When the new slab bleeds, water rises to the surface and can create a laitance layer, leaving a weaker, more plastic surface. If this fresh slab is connected to an existing slab, movement is restrained as both pours cure, while they shrink at different rates. That restraint combined with the weaker surface promotes tensile stresses at the top, which express as cracks. So the surface is expected to crack, especially near the joint where the two slabs meet, rather than smoothing out or maintaining a uniform color.

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