... can be found with (non-destructive) DNS-Denzel-Moisture-Detectors.
Non-detected Rest-Moisture is the most responsible reason for any damage, caused in Concrete and on sealants, coverings, floorings and hydrophobations.
The true source of any Construction-Material-Damage (and ongoing decease to health of human) is too much water, which expands while being heated (through sunshine and floor-heatings) to water-damp, and, (if being 'encapsuled' under floorings and/or coverings), produces water-damp-pressure, which is able to damage any construction-material (included the health of human !).
In order to find 'too much bad' water in concrete (or any other material) it is necessary to know, what 'good' water-content (Equilibration-water-content compared with air-water-content or pressure) means.
Any Moisture-Meter MUST be calibrated for the particular construction-Material, because any Construction-Material will dry (while producing water-Damp and water-Damp-Pressure) to ANOTHER (non-dangerous) Equilibration-Point.
DNS-Denzel has calibrated their Moisture-Detectors with almost all European Construction-Material-Moisture-Profiles (Site-related drying/hardening-curve) (Material-List) and many US-American and Canadian Cement-Binders (List).
If your local Material is not listed in our archive, please send us 1 kg of the cement-binder (exact named) and we develop a moisture-profile which can be calibrated on your personal DNS-Denzel-Moisture-Detector.
Moisture-Profiles have been found with Rawmaterial-Probes who are mixed in a Site-related manor, dried under site-related conditions, and under 'normal'-possible environment-conditions (20°C / 55 % r.H. for Europ), till reaching the 20°C-Equilibration-Point, and then being heated (uncovered) in the 42°C-Oven, which gives the 0,0 % Moisture-Content-Value. This Moisture-Profile makes it possible to measure as well particular-heated substrates like open-air-concrete and floor-heated Screeds, for their particular Rest-Moisture-Measurement.
All other material- or environment-conditions can be simulated based on the 20/55-related Moisture-Profile.
The following formula is a Sample how to decide whether a concrete (screed)-Substrate is 'dry enough' or 'too wet' :
|1,6 %||+||0,2 % (for Parquet)||=||1,8 %|
|2,3 %||./.||1,8 %||=||0,5 % 'too much'|
|=||550 g water / 1 m² / 5-cm-Concrete-Screed|
Beside 'good luck' you are in need of our reliable DNS-Moisture-Detectors and our ongoing support.