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Lean concrete

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From: 	Szuchuan Chang[SMTP:szchang(--nospam--at)]
> Sent: 	Thursday, September 17, 1998 4:13 PM
> To: 	seaint(--nospam--at)
> Subject: 	Lean concrete
> Need to fill thre 8'-deep pits that are housing floor scales.  Will need
> about 400 cubic-yards of material to fill them.  Thinking of use lean
> concrete to avoid the testing and inspection of compaction. (top 18"
> must be concreted anyway.)
> How to specify lean concrete that will be used for fill only?
> Thanks
> Sam Chang
> Cupertino, CA

I have used the following mix on many occasions for fill:

1 1/2" rock		 800 pounds
   3/4" rock		1000 pounds
sand			1500 pounds
cement			  141 pounds
water			    30 gallons

Roger Davis
SDS Architects, Inc.