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Self consolidating concrete (SCC)
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10-02-2011, 07:02 PM #21
eaadams Concrete Moisture Expert *****
Status: Offline Posts:591 Threads:85 Joined:Jul 2010
Jd, I don't quite get what you are saying...

Scc has plasticisors and it should have capilaries since it.does still dry even if with less water.

10-03-2011, 05:58 AM #22
CC Solutions Concrete Moisture Evangelist *******
Status: Offline Posts:1,065 Threads:69 Joined:Dec 2009
A concrete poured with a high water content will contain large voids when it begins to dry. That's why poor concrete is more porous than good, well compacted, low W/C ratio concrete.

JD Grafton
Concrete Answers for Flooring Problems
JGrafton@ccsolves.com

10-03-2011, 07:31 AM #23
rthompson Industry Expert *****
Status: Offline Posts:72 Threads:0 Joined:Sep 2008
The flooring industry recommends that the water/cement ratio not to exceed 0.50. ASTM F710 States the w/c ratio to be between 0.40 and 0.45. The average in the US is 0.58 what I consider crapcrete.

10-03-2011, 08:32 AM #24
CC Solutions Concrete Moisture Evangelist *******
Status: Offline Posts:1,065 Threads:69 Joined:Dec 2009
I had a slab I worked on that was poured with a very high ratio, I'd have to get the old papers out to see how high it was, but it was wet, like .65 or more.

It dried really quickly, much faster than any of us figured it would. Then we thought perhaps it was all the voids that helped it dry. There may be something to that, but the concrete was pretty weak. Good enough for a floor slab though.

JD Grafton
Concrete Answers for Flooring Problems
JGrafton@ccsolves.com

10-07-2011, 06:09 AM #25
CC Solutions Concrete Moisture Evangelist *******
Status: Offline Posts:1,065 Threads:69 Joined:Dec 2009
(10-06-2011, 11:45 PM)greer63sykes Wrote:  Self consolidating concrete (SCC), also known as self compacting concrete, is a highly flowable, non-segre- gating concrete that can spread into place. This post is really interesting one.

Sounds like a Wiki answer greer. And with the spam link attached methinks your intentions are less than honorable... Dodgy

JD Grafton
Concrete Answers for Flooring Problems
JGrafton@ccsolves.com

10-13-2011, 10:18 AM #26
EWagner Administrator *******
Status: Offline Posts:50 Threads:19 Joined:Jul 2008
spam removed by admin.

thanks JD!

10-13-2011, 10:38 AM #27
CC Solutions Concrete Moisture Evangelist *******
Status: Offline Posts:1,065 Threads:69 Joined:Dec 2009
Thank you Heidi!
If this is Heidi that is.... Question

JD Grafton
Concrete Answers for Flooring Problems
JGrafton@ccsolves.com

12-15-2011, 12:59 AM #28
foxgeorge Newbie *
Status: Offline Posts:5 Threads:0 Joined:Dec 2011
Self-compacting concrete is a concrete mixture that is able to consolidate under its own weight. The highly fluid nature of it makes suitable for placing in difficult conditions and congested reinforcement. Use of it can also help minimize hearing-related damages on the worksite that are induced by vibration of concrete. Another advantage of Self-compacting concrete is that the time required to place large sections is considerably reduced. Self-consolidating concrete is a highly flowable, non-segregating concrete. It can be used casting heavily reinforced sections. The required level of fluidity is greatly influenced by the particular application under consideration. Obviously the most congested structural members demand the highest fluidity.

12-15-2011, 11:41 AM #29
CC Solutions Concrete Moisture Evangelist *******
Status: Offline Posts:1,065 Threads:69 Joined:Dec 2009
Hi foxgeorge, glad to have you!

So when you use a self consolidating concrete there must be a stricter limit on the height of each pour. How long does the concrete take before it can support its own weight and then another lift above?

JD Grafton
Concrete Answers for Flooring Problems
JGrafton@ccsolves.com

05-07-2012, 12:55 PM #30
JDJR Newbie *
Status: Offline Posts:5 Threads:2 Joined:Sep 2009
walked into a job today with 10" Cast in Place on Grade and Suspended
the concrete contractor told me they used Super P - there are a bunch of what looks like stress cracks throughout the slab - he told me that's common with this product - hoping you could shed some insight








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