Sunday, July 17, 2011

This is not as easy as it looks

We haven't posted much since mid-June, because we've really been hustling to get to the point where we have a solid deck for the structural insulated panels (SIPs), which we had hoped to have delivered and erected by now.

But this is a big project. Here's the 1st pour:

Honestly, the driver was awesome...look how close he got! He came in at each corner, and the chute managed to reach all the pads in the center, as well as the footer itself. This spared us trying to catch concrete in a wheelbarrow and trundling it over to pads that were farthest from the perimeter. We'd read about "slump" and "psi", but this was real, and the driver was good at guesstimating the "wetness" of the concrete that would allow us to spread it quickly while maintaining strength. 4000 psi was specified for the pads, and 3000 psi for the footer. But we worked out that we could save delivery charges, and get both trucks (12-1/2 cubic yards) with a 3500 psi mix, since we thickened the pads and footers by a couple of inches.

Here one of my nephews, Trevor, helps to move wet concrete in the footer form to level it off.

And here's a finished section along the east side of the house.

Here's the deal: concrete comes out much faster than you expect, and it hardens much faster than you're ready for!

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