ASTM F2170-11 pdf free.Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes.
This test method covers the quantitative determination of percent relative humidity in concrete slabs for field or laboratory tests.
4. Summary of Test Method
4.I This test method comprises two procedures for forming holes in concrete into which a relative humidity probe is placed. Procedure A for hardened concrete involves drilling a ylindrical hole in concrete with a rotary hammerdrill, then placing a hollow sleeve to line the hole. Procedure B is an alternative procedure for fresh concrete, which involves form ing a cylindrical hole in concrete by placing a hollow cylin drical tube in the formwork, then placing and consolidatin concrete around the tube. The liner or tube permits measure ment of RH at a specific, well-defined depth in the concrete.
4.2 Methods of probe calibration and factors aflecting quilibration are described in Section 8.
5. Significance and Use
5.1 Moisture permeating from concrete floor slabs affects the performance of flooring systems such as resilient and textile floor coverings and coatings. Manufacturers of such systems generally require moisture testing to be performed before installation on concrete. Intemal relative humidity testing is one such method.
5.2 Excessive moisture permeating from floor slabs after nstallation can cause ioor covering system failures such as debonding and deterioration of finish flooring and coatings an microbial growth.
7. Hazards
7.1 Silica and Asbestos Warning-Do not sand, dry sweep. dry scrape, drill, saw, beadblast, or mechanically chip or pulverize existing resilient flooring, backing, lining felt, paint asphaltic cutback adhesives, or other adhesives. These products may contain asbestos fibers or crystalline silica. Avoid creating dust. Inhalation of such dust is a cancer and respiratory tract hazard. Smoking by individuals exposed to asbestos fibers greatly increases the risk of serious bodily harm. Unless positively certain that the product is a nonasbestos-containing material, presume that it contain asbestos. Regulations ma require that the material be tested to determine asbestos content.