You're a pretty good carpenter, that all looks great
While I've placed and finished my share of flatwork, I've never cast concrete or used a plasticizer. I'm planning to cast some raised-bed planters (four walls separately) as well as make a topper for my backyard block wall. So it's nice to see a viv guy taking a stab at it and doing OK.
Curious if you considered including perlite or something to reduce the weight of your sculpture? Instead of pre-mix, a DIY mix of Portland cement + "stuff". This guy is my inspiration for the raised beds plus wall topper:
He's got a little series of vids, various builds as well as some strength testing. He's pretty analytical, it's nice.
So sorry about all the do-overs! My wife is a little (OK quite a lot) like that - has abundant opinions but isn't very open with them up front. Just later
, after I'm well into whatever the job is. Ha ha. Argh
. I've learned to try harder to draw her out before I'm committed. Success still varies...ah, the human condition
. Ha ha.