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Fast Concrete? (Feb 21)

Friday, February 21, 2014

Fast Concrete?  Feb 21

Tuesday evening I stopped by the UAS Freshman Housing project site on my way home from the office.  The Contractor poured the third floor concrete deck early that morning and the concrete finishers were still there working putting the final finish on the surface. 

The concrete foreman was grumbling “this accelerated concrete is difficult to finish.”    

 

Concrete Finisher
Concrete Finisher

Accelerated Concrete? (Fast Concrete)   Contractors have been using cement concrete for thousands of years.   In the past 50 years, the developers of Portland Cement Concrete have invented many new products that make concrete stronger, lighter, and faster.   They use what are called accelerators to make the concrete set up faster and achieve design strength sooner.  Normal concrete will reach design strength in about 7 days and full strength in 21 days.  Fast Concrete (Accelerated Concrete) will reach design strength in 3 days.  The main advantage of Fast Concrete is that the contractor can remove concrete forms and start building much sooner.  In cold weather the Contractor does not have to keep it heated as long.   

I must be getting old, because I don’t always think faster is better and often wish that we could all slow down and enjoy life a little more, stop and smell the roses, watch a sunset, read a book, or even sleep in the day after a long hard day of pouring concrete. 

This week the Contractor poured the second and third floors of Hall II.  This completes the concrete pours in Hall II and has opened up more room for the electrician’s and mechanics to complete their work.  The Contractor is pouring the fifth floor of Hall I today and is hoping for good weather to pour the remaining two floors next week.

 

This weekend there is an Opera at JDHS, gospel choir at the JACK, Olympics on the TV, clear blue skies overhead and the northern lights forecast is a level 4!  I can hardly wait.  Wish we had an accelerator for Fridays. 

 

Pumping Concrete onto Floor 2 – Hall II. 

 

Concrete Truck
Concrete Truck

Concrete Crew

 

Concrete Crew
Concrete Crew
 

Framing interior walls on Fast Concrete floor that is just 20 hours old.

Wall Layout
Wall Layout

 

 


     
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