QUANTIFYING THE POSITIVE EFFECTS OF INTERNAL CURING ON CONCRETE STRUCTURES
 
Learn how internally cured concrete can extend the service life of concrete structures by nearly 50 years. This recent ground-breaking study examines the opportunity to significantly enhance the durability of most concrete structures exposed to the elements of weather.

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One of the biggest challenges in the concrete industry is how to prevent premature cracking of structures.

In Extending Service Life of High-Performance Concrete Bridge Decks with Internal Curing, authors L. Daigle, D. Cusson and Z. Lounis of the NRCC (National Research Council Canada) were the first to perform a study on quantifying the service life of bridge decks when internally cured concrete is applied. One of the key components in producing internally cured concrete is rotary kiln lightweight aggregates.

Daigle, Cusson and Lounis tested normal concrete, high-performance concrete, high-performance concrete with internal curing and very high-performance concrete with internal curing. The physical data for the four types of concrete was measured and inserted into a model hypothetical bridge deck and then various AASHTO and ASTM standards were applied to determine and compare the anticipated service life of the concretes.

The results showed that when compared to normal concrete, high-performance concrete with internal curing could extend the service life of concrete structures by a minimum of 27 years and very high-performance concrete could extend the service life by a minimum of 49 years.

I encourage you to read the entire study to get more specifics on how this test was conducted and how it may apply to your situation.

Also, don’t miss all the workshops being presented at the 2009 International Bridge Conference.

For more information and related articles on internal curing, please visit the Internal Curing/Specified Density homepage.

Sincerely,
Ernest Cubit
General Manager, Sales & Marketing
TXI Expanded Shale & Clay

 
 

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