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I have always thought of concrete simply as construction material, but the first on-ramp deck pour in May changed my perception. Through the fist paving, I learned a little about the complex process and behavior of concrete.
The Concrete Mix
Obviously, it all starts with the concrete mix. There are many types of concrete mixes available. The mix design used is determined specifically by the requirements of a project and the various local building codes and regulations.
Mixing, Workability & Curing
Concrete production has three important processes: proper mixing, workability and curing. Proper mixing is essential since it yields a homogeneous mix.
Workability refers to the ability of the concrete mix to properly fill the form/mold. This process guarantees quality control and consistency. Once the concrete is placed in the form, it is leveled and smoothed out. Once it sets, it is ready for the curing process.
Curing requires moisture and temperature control. It’s moisture that helps develop the needed physical and chemical properties in the concrete. Hydration is critical because improper hydration can lead to a porous weak product. Temperature control is achieved by placing canvas blankets over the concrete. From this point, it takes approximately 10 days for the concrete to cure.
The End Product
Since the first on-ramp deck pour in May, two more have followed. The latest on-ramp concrete pour was done on July 30th and it’s currently in its curing stage. With three on-ramp deck pours completed, the science behind the precise preparation and care of concrete has become evident. I can honestly say, I will never see concrete the same way again!