Slump test is for testing how much water is in the mix,lower the number equals less water.Slump is how much in inches the concrete goes down after the slump cone is packed and then removed. If you order 3500 you should get at least 3500 and that is if you keep it around a 4" slump,if you let the finisher put in enough water to raise it to a 6" slump then you won't have 3500 anymore as too much water kills the strength of concrete.The best way to pour concrete is use a Plasticizer you should get the concrete with a 3" slump then put in the plasticizer and it'll take the mix to about 7" slump for about 30-45 minutes time to get it off the truck and worked down then the concrete starts to go back to a 3" and you'll have a good strong slab.
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Today's Featured Article - The Fordson F Ignition System - by Anthony West. A fellow restorer contacted me earlier this year asking for some help and advice on a model F that he was restoring. He had over a period of months spent a fair amount of his hard earned cash on replacement parts for the old "trembler" ignition. Sadly though all his efforts seemed to be a waste of time and money as he still couldn''t get the temperamental old thing to run correctly!! If i said that this was a little frustrating for him that would be "conservative" in fact the problem had reduce
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