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 Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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