Spray-on Concrete Slab Densifiers, Hardeners & Moisture Cures
These products, commonly referred to as “slab densifiers,” are just different types of silicoid densifiers added to the concrete mix before the pour that have been on the market for over thirty years. They are finding new markets because of all the issues surrounding concrete moisture and moisture sensitive floor coverings.
Essentially they work exactly the same as the silicoids that are entrained into the concrete prior to its placement such as Read More
The Layman’s Guide to Testing Moisture In Concrete
by Charles Milledge
Some days I think I spend about half of my work day answering questions about concrete moisture and test procedures.
Anhydrous Calcium Chloride Moisture Vapor Testing – The CaCl Test
ASTM – F1869-11 Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor using Anhydrous Calcium Chloride is the guide that needs to be followed to correctly set a CaCl test. Here are the boiled down basics for doing this correctly. Read More
The Behavior of Concrete Slabs With Control Joints and Cracks
by A. Kester
A lot of architects, contractors, and even engineers, do not have a good understanding on the behavior of concrete slabs-on-ground (SOG). I am just one structural engineer and these are my thoughts based on my research and experience. I have worked with concrete slab construction my entire career, and have done a lot of investigations of cracks and settlement damage to SOG, and have a pretty good general understanding of them. This is a review of the subject and I hope it helps people in the flooring industry in dealing with different types of slabs with control joints and cracks. Read More