Concrete speaker stands

[layums]

Hi need some help in specifying concrete mix for a smooth white finish of concrete cast in smooth MDF form work. Thanks.

 

[Andersonix]

Who needs a spec? A ready-mix concrete plant? More background, please....

 

[tvrgeek]

Don't expect the cast surface to meet your finish requirements unless you are making it yourself and have high power vibration and vacuum chambers.

 

[No 4]

You could try the mix for counter tops. You could use melamine and mold release wax. Your surface will be smoother and you can finish it. A little research on concrete counter tops might steer you in the right direction for your project.

 

[layums]

Great. Just what I was after. Additives.

 

[tvrgeek]

Don't counters require a lot of trowel work to get the cream to the top?

Of course, there is always Bondo.

 

[Roger Hardcastle]

I do not know the precise mix but adding some PVA is a good idea. Either PVA designed for cement mixes or just ordinary woodworkers PVA glue.

I am thinking about making some concrete blocks for my Celestion SL6 speakers. I am planning on making 3 inch thick slabs and standing the slabs one on top of the other - this will make moving the stands easier. I have thought out the mould - I am going to use MDF and planed pine. I am going to use model aircraft wing covering which is waterproof to seal the wood surfaces. A common brand is Solarfilm.