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Old 11th October 2012, 08:46 PM   #1
layums is offline layums  United Kingdom
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Default Concrete speaker stands

Hi need some help in specifying concrete mix for a smooth white finish of concrete cast in smooth MDF form work. Thanks.
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Old 13th October 2012, 06:56 PM   #2
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Who needs a spec? A ready-mix concrete plant? More background, please....
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Old 15th October 2012, 11:20 PM   #3
tvrgeek is offline tvrgeek  United States
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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.
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Old 16th October 2012, 12:15 AM   #4
SoIL4x4 is offline SoIL4x4  United States
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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.
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Old 18th October 2012, 05:43 PM   #5
layums is offline layums  United Kingdom
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Great. Just what I was after. Additives.
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Old 20th October 2012, 09:22 AM   #6
tvrgeek is offline tvrgeek  United States
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Don't counters require a lot of trowel work to get the cream to the top?

Of course, there is always Bondo.
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Old 29th March 2014, 04:58 PM   #7
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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.
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