What is the main problems appear when concrete delay two hour during casting?

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Om Prakash Chhangani

Beyond initial setting time if you do not use admixtures to keep it workable your quality will be poor.

Messaoud Saïdani

The delay will impact greatly on workability and obviously compaction, but apparently very little on the compressive strength.

s. Shaker

The concrete performance decreases and the concentration of cement paste prior to the vibration can lead to increased free space and reduced resistance.