Posted by Billy NY on August 23, 2011 at 21:47:34 from (74.67.3.54):
In Reply to: Re: Concrete burn posted by Oldtractorfun on August 23, 2011 at 13:24:28:
I've done and or supervised quite a bit of concrete work in the past, and as with any material, you need to know what you are dealing with, especially safety and is why we have MSDS sheets for most materials.
Concrete is a mix design of composite aggregates, a cementitious material (portland cement) which bonds the aggregate together. Design mixes vary, aggregate materials vary in properties, as per where the aggregate comes from, there is a certain size from each sieve size (screens of ascending sizes), certain percent passing from each, that comprises a particular design mix, to attain a compressive strength, for a particular application, be it a slab or a beam, column, pier, etc. Water is added, in proportion to cementitious material, is referred to as the water/cement ratio and is extremely important to the compressive strength of the design mix, too much or too little of either will cause the material to fail, it has to be per the design mix, design. Once you add water, and lest we not forget any admixtures, such as accelerators, super plasticizers, what have you etc., you do have a chemical reaction of sorts regardless, and if you look at the links I posted above, I think each site I posted, the information describes why concrete is caustic or can be in varying degrees, at least in laymans terms, which is all most need to know about it, including me ! It burns ... handle accordingly, very simple concept LOL !!!
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