This is very intriguing. I absolutely want to understand what you are
encountering. I guess I usually don't try to leave slurry laying
around long enough to experience this phenomenon. Your theory about
top vs bottom of the barrel seems logical and worthy of some kind of
experiment to test its validity.
Is it possible that some of the weaker blocks were handled too
quickly? Moving blocks that are too wet tends to crack them and weaken
them dramatically.
By all means, I hope you can determine for certain exactly what is
causing you this trouble and fix it. The information would be valuable
for everyone.
Please keep us informed as you learn more.
--- In papercreters@yahoogroups.com, "Eli Sutton" <elidesign@...> wrote:
>
><snip>
>
> When we started using metakaolin we were
> elated that set time was reduced to hours opposed to days, and
> shrinkage reduced considerably. What we didn't know at the time
> was that the metakaolin, at least in the proportion we used,
> reduced strength and hardness. At least most of the time, which
> brings me to the next point: The thing that I'm currently really
> curious about is that the quality of the blocks we made using the
> same mix design on the same day (same weather, etc.) varies so
> greatly.
>
><snip>
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/papercreters/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/papercreters/join
(Yahoo! ID required)
<*> To change settings via email:
mailto:papercreters-digest@yahoogroups.com
mailto:papercreters-fullfeatured@yahoogroups.com
<*> To unsubscribe from this group, send an email to:
papercreters-unsubscribe@yahoogroups.com
<*> Your use of Yahoo! Groups is subject to:
