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curing compound
03-25-2011, 05:04 AM
Post: #11
RE: curing compound
A couple clarifications. The field study went for 2 years and the concrete was finished in a manner common to big box floors these days. What's never really been considered is the impact of heavy ride-on trowels on surface finishes. On this floor the densified finish was approximately 1/8 inch thick. The water was pressed out, mostly downward, leaving much of the cement unhydrated. In that state portland cement becomes a very hard abrasive resistant aggregate. Also, there was no pore structure to speak of, making the top 1/8 inch very impermeable. My guess is that a light bead blast wouldn't do much to make the surface more permeable unless you went through most of the densified layer.

The inside conditions are typical of many or most warehouses. The owner heated the building to about 50F in the winter and there was no heat or air conditioning in the summer. So ambient conditions in the winter were about 40% RH and 50F and in the summer they were up to 80% RH and in the 75F range.

We just published the last article about the study and you can view that, along with all the other articles written about it at http://www.concreteconstruction.net/field-test.aspx

Best Wishes
Joe Nasvik
Sr. Editor, Concrete Construction magazine
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Messages In This Thread
curing compound - marks - 03-22-2011, 01:34 PM
RE: curing compound - eaadams - 03-22-2011, 02:01 PM
RE: curing compound - Ernesto - 03-22-2011, 03:34 PM
RE: curing compound - CC Solutions - 03-22-2011, 04:11 PM
RE: curing compound - eaadams - 03-22-2011, 05:34 PM
RE: curing compound - Ernesto - 03-22-2011, 07:35 PM
RE: curing compound - CC Solutions - 03-23-2011, 06:04 AM
RE: curing compound - eaadams - 03-23-2011, 09:25 AM
RE: curing compound - CC Solutions - 03-23-2011, 10:00 AM
RE: curing compound - eaadams - 03-24-2011, 09:30 PM
RE: curing compound - jnasvik - 03-25-2011 05:04 AM
RE: curing compound - eaadams - 03-25-2011, 08:28 PM
RE: curing compound - CC Solutions - 04-01-2011, 07:58 AM