| 2:20:42 PM - Mon, Apr 16th 2012 |
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| There are a number of things that can cause this and I had heard about this article but not seen it before. I was told years ago that the stain may be a product of a chemical reaction between the decomposing body and cheaper materials like ash that were mixed into the concrete as filler. True concrete has been around for years but the proper mixture of materials and proportions that were needed to make the concrete as strong as stable as what you get out today (even the cheap stuff that comes in the bag) took years to perfect and many times contractors will have their own special mix they'll throw in the stretch the concrete mix a little farther. One of my in laws works for the road commission. A common filler product that they use in concrete mixes that is designed to reduce how porous the concrete is is fly ash (they buy it bulk from a coal fire power plant and it's the extremely fine ash material that is caught by the stack scrubbers or goes up the chimney as they burn the coal). In theory if they mixed a lot of crushed lime or other material in the concrete for the floor and the pores were large enough for liquid to get through the materials could still be reacting with each other. Using a cleaner might even just push the decomp material farther into those pores making clean up impossible.
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