I'm building four brick columns each approximately 320 x 320 which will be around 1600 tall and support a raised deck. I have bedded some short lengths of rebar in the footings and had intended to fill the hollow centre of the completed columns with concrete and add a couple of lengths of rebar to give additional lateral strength. I am now just a little concerned that the pressure of the concrete fill whilst it's still liquid could damage the brickwork. Do you think this is a potential problem or am I worrying about nothing? John.
Don't make the concrete sloppy, just make it wet(damp) enough to hold together, then lightly tamp it down as you fill pillar. I usually wait a few days for pillars to harden off a bit before filling them.
Does it need to be fully concrete? What are you doing with the offcuts if bricks &c? Use those with some dry/slightly damp concrete once the main columns have cured for a few days..
Thanks for the advice, I feel a bit more confident now. Also, resting on these columns will be a timber beam made up from two pieces of 47 x 225 bolted together. Any suggestions how best to secure these to the columns and should I top each column with some type of cap stone / slab to spread the load from the beam over the entire column section?
Should be able to get a concrete post support wide enough,or post shoe anchor base bolt down should work,& allow the beam to be fixed in place.
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