Okay, We've got a problem here!! A few months back we got in some concrete with fiberglass reinforcement in it (replacing the aggregate) for our airfield repairs. Our airfield stays pretty active so we really don't have time to let the concrete set normally. They sent us some accelerator and it worked great, set up really fast when we mixed 2 parts concrete to 1 part accelerator. Well the stuff I tested in the fall is all gone now and SUPPOSEDLY we got more, but its in a different kind/color bag then it was in before. I'm not even sure it was accelerator but we got a few he said / they told me stories, so we tried it. It took almost 24 hours to set-up enough to drive over it!! So, I'm trying to find out if this was accelerator or some type of grout or morter they sent us (Thats what it smells like) I mixed some accelerator by itself (just a cup full) and it set up in about an hour or so. My question is, should accelerator (powder not liquid) set up all by itself?? I would think there is a chemical reaction that takes place with the cement or something. Please let us know what you know about this because its hard to find out anything about the product being here in Germany, they're always trying to pull stuff over on us. Thanks in Advance!