Construction Materials Testing Equipment
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Construction Materials Testing Equipment
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The Percometer is a reliable, accurate, lightweight and easy-to-use instrument for measuring the dielectric value (εr), electrical conductivity (J) and temperature of materials indoors and outdoors. Dielectric value is an indication of the volumetric moisture content and the state of molecular bonding in a material. Electrical conductivity is a reflection of ionic concentration, water content and temperature.
Moisture Damage (Structural damage)
When moisture infiltrates a wall, causing damage, εr values will be significantly higher than those from undamaged areas of the wall.
Tube Suction Test (Aggregate moisture susceptibility)
Measuring the suction properties of bound and unbound aggregates and road materials. This passive capillary test demonstrates a materials' capacity to adsorb water if available, free water content directly affects mechanical performance of an aggregate.
Asphalt Air Voids (Pavement quality control)
Air is also one of the volumetric components that influences εr. Measuring εr can provide an indication if a pavement has been sufficiently compacted.
Soil Moisture
Since εr is a function of the amount of free water in a material, Percometer can be an effective tool for determining soil moisture.
Frozen/Unfrozen (Soils and Road Structures)
When the free water in a material freezes the conductivity drops to around zero and εr values decrease to values ranging from 4 to 12.
Frost Susceptibility (Soils and subgrade)
A strong correlation exists between εr and frost susceptibility of unsaturated soils.
Salinity/Sulfates
J is a function of soil salinity, colloid content and temperature. The presence and fraction of sulfates is an important factor in determining if road subgrade can be stabilized with lime.
Fertility
Forest regeneration species selection Regeneration potential of a soil can be assessed using εr value.
Snow (Ski wax control)
The amount of unfrozen water determines the friction properties of snow (slipperiness). εr values provide an indication of this amount and can be used to determine how much fluor should be applied to skis.
Temperature
Useful for evaluating whether changes in electrical conductivity are due to temperature or changes in ionic concentration.
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