On Dec 11, 9:06 pm, "Calif Bill" wrote:
wrote in message

...





On Dec 11, 5:20 pm, wrote:
On Dec 11, 4:43 pm, John H. wrote:

On Tue, 11 Dec 2007 13:32:05 -0500, "Reginald P. Smithers III"

wrote:
John H. wrote:
On Tue, 11 Dec 2007 09:49:43 -0800 (PST),
wrote:

On Dec 11, 11:42 am, HK wrote:
http://tinyurl.com/2kphb2
Better than fishing in waters so polluted that they catch fish with
open sores on them like the Chesapeake's.

Hey, we throw those back!

There are a few here in the group who are helping the bay with a
tree
planted in their name. By now, the trees are probably getting to be
decent
sized.

Any help would be appreciated!

http://tinyurl.com/yv2efe

Do they put a little plaque with my name next to the tree?

Send me a plaque. I'll go plant a tree myself and put it right there!
Hell,
maybe I can get loogy to build a little 4800psi concrete monument!
--
John H- Hide quoted text -

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These days I only build things for myself. I can however design it.
But don't you want 48,000 psi instead? You know, the common mix for
garage floors?- Hide quoted text -

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It was supposed to be 4800, am I the only one in this group that can
admit a mistake once in a while? And it was not common for any garage,
my friends added it to a truck and poured it on the way back from a
machine shop pour on a saturday morning. I don't really care if you
beleive me or not. We traded favors and all I do know is the driver
and the owner's son were joking about it while we were setting up
cause this stuff was the very best heavy load mix they sold and it was
going in 12 x 20 foot barn in my backyard.. Anyway, it ain't going
anywhere, anytime soon.

Later, I made a mistake, it's over loogie. No great victory here,
everyone just move on along now Well, except I still doubt you
know more than Bobby and his dad... and his dad...and...... whatever...

My fathers machine shop had very uneven ground in the back part. Friends of
the family got the contract for the concrete for the Richmond San Rafael
Bridge. Lots of extra concrete as they could not pour if the truck had to
stand over 45 minutes with a mixed load. So the back section of the shop
became a huge concrete area. Some of the concrete was 4" deep and some was
12' thick. Batch plant was about 300 years from the shop, so easy place to
get rid of the extra. Unfortunately, dad had to go spread concrete at
midnight sometimes. Have no idea of the quality, but I bet it was top grade
for a bridge.- Hide quoted text -

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Not necessarily "top grade" or even any better than what would have
been used anywhere. Depends on the application, and design parameters.
Also the serviceability of concrete has a lot to do with placing
techniques, reinforcing etc. For one thing, concrete doesn't perform
well in tension, so that is where the reinforcing needs to be. I see
people pouring slabs all of the time and they pull the WWF up to the
top of the slab. That slab face will be in compression with load
applied, and concrete performs very well in compression without
reinforcing. But with load, that slab will crack, because the
reinforcing needs to be in the tension face, or bottom third.