.:Paramount Ready Mix | Santa Fe Springs, CA:.


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Did You Know?
JOINTS IN CONCRETE FACT: Concrete shrinks as it dries – therefore it will crack. 1. Joints are simply good looking pre-planned cracks. 2. There are two basic joints to remember; Contraction joints… Tooled or saw cut into slab to direct the crack Expansion Joints… These isolate the slab from other structures. 3. Joints should be carefully designed and properly constructed. 4. Further reference material, please call Jeff Weidmann at (562) 404-4125 ext. 1

That if you add only ONE gallon of water to a yard of properly designed 3000psi Concrete Mix… You increase the slump about one inch You cut the compressive strength by as much as 250psi You waste the effect of Ľ bag of cement You increase the possibility of seepage through the concrete by up to 50% You increase the shrinkage potential about 10-15% You decrease the freeze-thaw resistance by 20% You lower the quality of concrete in many other ways: 1. Less wear resistance 2. Dusting 3. Cracking 4. Repairs You can affect setting times in cold weather (retard the set)

Proper curing of concrete is one of the most important steps to be followed in order to allow the concrete to reach its full potential. Why Curing is so important: Improper curing can cut the design strength by 50% It will crack less, dust less, be stronger, more durable and have a better wear resistant surface It will have fewer pores where water can enter It will promote less crazing and spalling of the concrete Methods of Curing: Membrane Curing Compounds Water Spray (keep slab continuously damp) Waterproof Curing Paper Damp Burlap Plastic Sheets Damp Earth, Straw, Sand or Hay Ponding for 7 days NOTE: Cure concrete longer when the temperature is below 70 degrees because concrete strengths develop more slowly at lower temperatures.