Quote:
Originally Posted by RWebb
Self mix is a recipe for disaster -- what causes these disasters?
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It takes so long to mix up batches that the placed stuff starts to cure before you mix the next batch. Different batches are mixed to different consistencies. Working the "new" batch into the "placed" stuff only works while the "placed" stuff is still workable. Concrete doesn't dry like a mudpie. It cures. A chemical reaction takes place, making it warm to the touch. That curing process is unstoppable. You can add water until you are blue in the face and it will still cure. It's pretty frustrating when you realize you're not done mixing and placing and finishing but the mud is starting to cure already. You get that "I'm screwed" feeling. The best plan is to fully prep the site first (break out and haul away the old stuff, set up your forms, shoot your grade, etc. Be completely ready and have some helpers on site when the truck arrives.