I just installed my new Speed Dawg knob and it is gorgeous! You guys do fantastic work! I ordered a custom knob to match my Grabber Orange Mustang and it was totally worth the wait! I am super happy! I even put your decal on my side window. Kudos to Speed Dawg!- Howard B., Fayetteville, NC.
A concrete mixture ratio of 1 part cement, 3 parts sand, and 3 parts aggregate will produce a concrete mix of approximately 3000 psi. Mixing water with the cement, sand, and stone will form a paste that will bind the materials together until the mix hardens.
If I still remember my American Concrete Institute (ACI) manual, a concrete can withstand a compressive stress of 2000 pounds of load per square inch. This is wahta they referred to as Class A concrete, with a mixture ratio of 1:2:3 of stone:gravel:cement mix.ow much weight can a 5 thick concrete slab withstand before it will crack? Update: It's a garage floor (standard 2-car) and my husband is planning on putting a milling machine or something like it in there.