On 6 Jun 2005 07:35:20 -0700, wrote:

"The saw joints ( I was mistakenly calling them expansion joints) were
cut in on the third day. No way not to have the concrete truck on the
compacted "

So you have no real expansion joints, just the saw joints? No wonder
it cracked.

It's not cracking from expansion. Sawed joints are all that's needed
to control cracking.