I recently observed an application where the horizontal ceiling slab delaminated, while the vertical walls were well bonded. However the down side is that its time consuming and could be expensive, although the expense should be minor consideration compared to the cost for replacement of a failed floor covering. For example: 75% RH = what amount of MC? That is why ensuring optimal curing conditions for your element is critical, especially during…, When it comes to any construction project that requires the use of concrete, whether it’s a hospital, residential building, road, bridge, or dam, concrete strength testing is an essential step in ensuring the integrity and durability…, How Curing Methods Affect High-Strength Concrete ASTM C31 is the standard that defines two different concrete curing conditions, standard curing and field curing. I am work at applicator of flooring paint. With the increase and demand for more housing, in a shorter period of time, coupled with the use of laminated flooring systems, the failure rate of these flooring systems, being MDF or Ply based, or vinyl, has increased dramatically. Good luck. – RH above a curved water meniscus slower than 100 %; lower the more curved the meniscus is, Her paper based on her thesis, Effect of High-Performance Steel Materials on the Blast Behaviour of Ultra-High Performance Concrete Columns, won the award for Best Paper at the 2016 First International Interactive Symposium on UHPC. According to ASTM F2170, when drying, concrete slabs have lower moisture levels near the surface and higher levels towards the bottom of the slab. The moisture content that is safe for long-term storage is 12% for corn, sorghum, rice and wheat and 11% for soybean. Your email address will not be published. Concrete, Gypsum, Wood . This information can be used for quality control and quality assurance purposes, allowing you to optimize the time in which you place your floor covering material. You should also show the relationship between moisture content and RH in a material. Mike, + Substrate moisture content is between 4% to 6%. This in it’s self is a concern for the health and well being of both the occupants and the installers. This is where the problems occur. Orders received after 12pm PST on December 10th through December 11th will be shipped on December 14th. … Relative Humidity Test (In-Situ Probe Test) Use a prepackaged relative humidity testing kit (must be compliant with the most recent ASTM F2170) and follow the manufacturer's instructions. I can state though that I have never heard of moisture in concrete causing chipping or breaking of vinyl plank. VAPOR EMISSION TEST (MVER) ASTM F 1869 Calcium Chloride Test Measures moisture vapor emissions from surface of the concrete. If your concrete contains excess moisture and high RH levels this can lead to disastrous flooring failures, resulting in costly repairs and liabilities. On a range from 0-6 what is an acceptable reading to install? Thanks for the question. Additionally, even IF the so-called ‘concrete moisture meters’ were sufficiently accurate (again, they are not), they only measure ‘moisture’ (not relative humidity) in a very small area near the surface of the concrete slab. To … Your email address will not be published. Concrete slabs and floors can be excellent subfloor surfaces for tile and other floor coverings, but too much moisture in the concrete can cause problems with flooring installations. Concrete moisture meters should never be used to make the final determination as to whether or not a concrete slab is dry enough for a flooring installation. Read Sarah De Carufel, M.A.Sc. This is where the problems occur. • Instant Readings in Non-Destructive and Wood Probe modes. When talking about wood MC and RH, there is a definite … During the construction of a concrete building, an essential step in the application of flooring is the importance of monitoring the relative humidity (RH), moisture levels, and the moisture evaporation rate of your slab. Relative Humidity Testing. Missing or inadequate moisture barriers in a slab on grade, causing outside moisture to penetrate the slab. Home » The Rapid RH® Concrete Moisture Test » Concrete Information & Knowledge Base » Concrete Moisture Meters vs. It involves drilling a hole into the concrete and inserting a probe that measures moisture deep within the concrete matrix. It would, certainly, be beneficial to present Kelvin’s effect or the influence of the water meniscus curvature on vapor pressure and, subsequently, the equilibrium between vapor and liquid phases. What Is Concrete Curing? Learn More Here! Therefore, measuring RH levels at 40% depth of the slab (20% depth if drying on two sides), is more representative of the overall humidity conditions of the concrete. Keep in mind that an uncovered concrete slab will indeed have an RH gradient (typically drier at the surface; much wetter at depth) throughout its thickness until a floor covering is put on top. Relative Humidity in Concrete Moisture Testing There are myriad approaches to concrete moisture testing, but some are just scratching the surface when it comes to getting an accurate measurement of the moisture that may be lurking beneath. Measures moisture vapor emissions from surface of the concrete observed an application where the horizontal slab. That Measures moisture vapor emissions from surface of the concrete and inserting a Probe that Measures deep! Test » concrete Information & Knowledge Base » concrete moisture Test » concrete &. 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