The white concrete desk is completed and installed. The cobalt blue and green bottles with the white sand and cement really pops.
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With a Ph.D. in Concrete Materials I specialize in "green" concrete, but have an affection for all things concrete. This blog will detail my exploits into all things concrete for the home.
Nice project! I was looking for some images of concrete computer desks which others have made - and remembered seeing this on your blog. Thank you for the link to mine, as well... We are installing our creation tomorrow in a Designer Showhouse - will post soon.
ReplyDeleteI'm interested in doing this exact same thing, but overtop my kitchen countertops.
ReplyDeleteDo you have an exact recipe with amounts/brands for all of the ingredients you used for the concrete mix?
This white mix was 2:1 sand to cement by weight at a 0.4 water-to-cement ratio. The cement was Lehigh, the sand was standard white silica. If you use regular sand the countertop looks tan. I also included 10% metakaolin clay. Water to latex was 1:1. Latex was Sika R you can buy at home depot. I used 4 oz/cwt of high range water reducer (BASF glenium 7500)and 5 oz/cwt of viscosity modifier (BASF VMA 362). There were two types of fibers in the mix, fiber mesh 300 polypropylene and cellulose (buckeye 500). So the final mix design was:
ReplyDeleteSand 2219 pcy
Cement 999 pcy
Metakaolin 111 pcy
Water 222 pcy
Latex 258 pcy
Poly fibers 2.5 pcy
Cell fibers 2.5 pcy
I am studying up on concrete counter tops and during my studies I came across your projects. I am interested in doing concrete counter tops for my kitchen. I would like to do white concrete, similar to your desk, but I was wondering how I might be able to get more of a granite or marble look to the counter tops? Any advice on how to do this?
DeleteChris, typically when people want marble or granite they aren't happy with faux concrete versions. If you are just looking for more texture I like to use a couple different related colors, like dark grey and light grey, and not spray but place the concrete in random blobs using tupperware. Be sure not to vibrate so you get a bunch of voids on the surface. After removing from the forms fill the voids with a third color. That's a pretty easy way to get a more natural texture that looks more like rock.
ReplyDelete