Can you pour concrete in standing water?

It is generally not recommended to pour concrete in standing water, as it can affect the strength and durability of the concrete. Here are some reasons why:

1. Weakened bond: If the concrete is poured directly into standing water, the water can dilute the concrete mix and weaken the bond between the cement and the aggregates. This can lead to a weaker, more brittle concrete that is more prone to cracking and breaking.

2. Uneven curing: Standing water can also affect the curing process of the concrete. If the water does not evaporate evenly, it can create uneven drying and curing, which can also weaken the strength of the concrete.

3. Difficulty in placement: Pouring concrete into standing water can be difficult and messy. The water can create a thin layer of slurry on top of the concrete, making it difficult to properly place and consolidate the concrete.

4. Quality control issues: Pouring concrete into standing water can also create quality control issues, as it can be difficult to ensure that the concrete is properly mixed and has the correct slump and consistency.

In general, it's best to avoid pouring concrete into standing water. If it's unavoidable, the water should be pumped out or diverted before pouring the concrete. If you have concerns about pouring concrete in standing water, it's important to consult with a professional contractor who can provide advice and guidance based on your specific project requirements.