Concrete Moisture Meter Readings

The reference scale helps to provide a qualitative estimation of moisture in different types of materials.

Concrete moisture meter readings.

This form of concrete floor moisture test is valuable in assisting contractors in identifying suspect areas that might require further testing deeper in the slab but that testing must be conducted with in situ probes. Seeing whether astm f 2170 testing is necessary for established concrete slabs. The moisture meter method. Most moisture meters are calibrated to wood which provides a relatively accurate reading in wood moisture content.

The thermo hygrometer s reading of the humidity in the concrete slab will tell you how much excess moisture is present deep in the slab that might evaporate up through the surface. There are times where the full on astm. Relative humidity meters such as those produced by wagner meters assemble the readings of probes placed at that mid slab depth in numerous test sites throughout the slab. The moisture reading scales are designed to determine a specific quantitative amount of moisture content mc in a specific type of material.

Moisture meters send an electromagnetic field approximately one inch beneath the concrete surface. Unfortunately there is no scientific basis to the test and it has been specifically disallowed for some concrete types. Typically this scale ranges in the 5 to 40 range. A concrete moisture meter measures the concentration of moisture at the slab surface.

Ed wagner answers the questions. First their measurement depth does not adequately reflect the drying condition of a whole concrete slab. The test is conducted in three locations for every 1000 square feet of concrete slab. In some cases you may only need a surface level.

Some moisture meters use a range from 0 100 and some use a range from 0 300 in the reference scale. This allows you to determine the moisture level across the entire surface of the floor rather than just one specific area. When you only need a surface level reading of moisture in concrete. Concrete moisture meters operate by sending an electrical signal into the concrete and measuring its resistance as an indicator of the moisture level in the slab.

This can tell you if the concrete is likely to damage the materials above it or suffer other problems. Sam pro dual moisture meter 2 0 new flashlight function rapidly readings of moisture and temperature work in over 100 materials best at checking lumber and hardwood for building. When are moisture meters useful for concrete testing. While they can be a useful survey tool they typically operate at about depth and can be susceptible to other elements within the slab such as rebar certain types of aggregates and more.

For each test site a packet of very dry calcium hydroxide is poured into a container which is then weighed.