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insuti testing
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05-02-2013, 11:30 AM #27
eaadams Concrete Moisture Expert *****
Status: Offline Posts:587 Threads:83 Joined:Jul 2010
I thought the top dark steel layer typically has lower cement hydration due to the water being pushed out.

ref: http://www.concreteconstruction.net/concrete/unexpected-results.aspx

" The process of squeezing most of the water and air voids out of the top 1/8-inch layer causes other changes too. Portland cement that doesn't hydrate soon after the initial mixing process doesn't hydrate in this layer either (see Photo D). "

[Image: tmp20.tmp_tcm45-627527.jpg]
"In this scanning electron microscope X45 magnification of the profile top ¼ in. of the slab unhydrated portland cement particles appear as white dots and air voids appear as black dots."








Messages In This Thread
insuti testing - jim decker - 03-14-2013, 02:09 PM
RE: insuti testing - CCR - 03-16-2013, 04:41 PM
RE: insuti testing - jim decker - 03-17-2013, 07:49 PM
RE: insuti testing - CC Solutions - 03-19-2013, 06:41 AM
RE: insuti testing - jim decker - 03-19-2013, 09:35 AM
RE: insuti testing - CC Solutions - 03-19-2013, 08:38 PM
RE: insuti testing - jim decker - 03-20-2013, 07:42 AM
RE: insuti testing - CC Solutions - 03-21-2013, 11:50 AM
RE: insuti testing - CCR - 03-21-2013, 05:08 PM
RE: insuti testing - jim decker - 03-22-2013, 08:45 AM
RE: insuti testing - eaadams - 04-29-2013, 04:27 PM
RE: insuti testing - CC Solutions - 04-29-2013, 07:01 PM
RE: insuti testing - eaadams - 04-30-2013, 09:15 AM
RE: insuti testing - CC Solutions - 05-01-2013, 05:57 AM
RE: insuti testing - CCR - 05-01-2013, 06:16 AM
RE: insuti testing - CC Solutions - 05-01-2013, 06:24 AM
RE: insuti testing - rapidrhrep - 05-01-2013, 10:15 AM
RE: insuti testing - CCR - 05-02-2013, 03:42 AM
RE: insuti testing - CC Solutions - 05-02-2013, 05:53 AM
RE: insuti testing - CCR - 05-02-2013, 06:33 AM
RE: insuti testing - eaadams - 05-02-2013, 08:05 AM
RE: insuti testing - CC Solutions - 05-02-2013, 08:45 AM
RE: insuti testing - eaadams - 05-02-2013, 08:59 AM
RE: insuti testing - CC Solutions - 05-02-2013, 09:02 AM
RE: insuti testing - eaadams - 05-02-2013, 10:21 AM
RE: insuti testing - CC Solutions - 05-02-2013, 11:25 AM
RE: insuti testing - eaadams - 05-02-2013, 11:30 AM
RE: insuti testing - jim decker - 05-02-2013, 12:31 PM

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