Yes, it is filling a microtrench slot for Google Fiber.  This is actually 
strong compared to other jurisdictions.  SLC wants 500 psi and UDOT wants no 
more than 150 psi.  

From: Zach Underwood 
Sent: Sunday, January 24, 2021 4:07 PM
To: AnimalFarm Microwave Users Group 
Subject: Re: [AFMUG] OT before and after

What is the reason for wanting such a low psi rating? It is to make it easier 
to remove in the future?

On Sun, Jan 24, 2021, 6:02 PM Chuck McCown via AF <[email protected]> wrote:

  The concrete strength ranged between 1200 and 2000 psi.  I tested 8 cylinders 
of two ages and 4 mixes today.
  Shooting for 1500 to 1650 psi.  So I think I have it bracketed.

  Turns out the fancy additives we tried were no better than simple calcium 
chloride.  

  From: Jaime Solorza 
  Sent: Sunday, January 24, 2021 3:50 PM
  To: AnimalFarm Microwave Users Group 
  Subject: Re: [AFMUG] OT before and after

  How much psi?

  On Sun, Jan 24, 2021, 3:29 PM Chuck McCown via AF <[email protected]> wrote:

    Cylinder test day








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