Concrete quality: saks of Sakrete

Awl--
In the previous concrete threads, it was pointed out that delivered concrete is a significantly higher quality than concrete in sacks. It was also pointed out that adding a little extra portland would help.
A local around here, who does home improvement, along w/ his family, said that they all agree that Sakrete in particular is crappy mix, and to buy another brand--altho he forgot the name offhand, but knew the place that carried it.
Any opinions on this? If true, might the Sakrete just need extra portland, as well? -- Mr. P.V.'d formerly Droll Troll
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Proctologically Violated©® writes:

The bagged products are subject to numerous user errors.
The delivered product is almost certainly mixed by someone who knows what is going on.
I suspect the reputation of bagged mixes has to do with Mr Mixer, not the mix.
You know, you can run a lot of tests on your concrete work yourself. Google "Gillmore tester", "slump test", and the like. Take juice-can samples and test them in your shop press for compression.
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Richard J Kinch wrote:

And is mixed in a truck designed for just that purpose, not in a wheel barrow using a shovel and a hoe. The driver needs to add the right amount of water and mix for the necessary period of time.
Maybe (I dunno one way or the other) a mix richer in cement is more forgiving to those errors.

Especially if you consider that fence posts are often set by pouring the mix in dry and then soaking it.
--
FF
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sakrete appears to do a good job, as long as its allowed to cure propperly and finished ok.
not like a buddy who laid his in the sun on a 90 degree day, never moistened the surface just rotted off:(
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wrote:

the bond with the center. Concrete should really be kept wet for 28 days to reach the design strength but usually a week or so is OK.
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