Hi
I'm casting some concrete steps with a C30 mix in a timber former, but have found after two attempts that air bubbles are persisting on the step surface i.e the bottom of the former. This is despite lots of tamping down and using a wetter mix on the second attempt. I was thinking about doing the step in separate layers and using an even wetter mix for the first layer but was concerned that using a too wet mix might affect the durability of the step surface.
Any ideas how to precast steps without bubbles?
I'm casting some concrete steps with a C30 mix in a timber former, but have found after two attempts that air bubbles are persisting on the step surface i.e the bottom of the former. This is despite lots of tamping down and using a wetter mix on the second attempt. I was thinking about doing the step in separate layers and using an even wetter mix for the first layer but was concerned that using a too wet mix might affect the durability of the step surface.
Any ideas how to precast steps without bubbles?
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