How much clearance will you have between the top of the stove and the bottom of the lintel? You should have a minimum of 300mm.
Your flue should drop low enough to sit on the base shutter form.
It hardly needs any rebar. As long as the sides are rough the new pour will lock solid in place forever.
Break out the bricks at the front high enough so that gravity can do its job on the pour and every nook and cranny will be filed.
Have a look at my first image. You can see a funnel was used to create head pressure. Seal any joints well or the flue will fill concrete.
Vibrating can be done using a hammer drill.
Your flue should drop low enough to sit on the base shutter form.
It hardly needs any rebar. As long as the sides are rough the new pour will lock solid in place forever.
Break out the bricks at the front high enough so that gravity can do its job on the pour and every nook and cranny will be filed.
Have a look at my first image. You can see a funnel was used to create head pressure. Seal any joints well or the flue will fill concrete.
Vibrating can be done using a hammer drill.