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.
Concrete with a low water-cementitious ratio (0.40 or lower) is more durable than concrete with a high water-cementitious ratio (0.50 or higher). Air-entrained concrete with a low water-cementitious ratio and an air content of 5 to 8% will withstand a great number of cycles of freezing and thawing without distress.f this excess water is worked into the concrete because finishing operations have begun too soon, the concrete on the surface will have too high of a water content and this surface will be weaker and less durable. Durability is the ability to last a long time without significant deterioration.