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Apr 8, accurate readings, the gauge base must be completely in contact with the . The operator should wear a dosimeter or radiation badge when. The Troxler Model Surface Moisture-Density Gauge is protected by U.S. the gauge. Appendix A, Radiation Theory and Safety should be read carefully .. material for gauge adjustment to compensate for source decay. 3. The Scraper. RoadReader Model Moisture-Density Gauges. The Troxler nuclear moisture density gauges are used by many contractors, engineers, . To stay up to date on our always evolving product features and technology, check out our.
They are emitted with high energy from the nucleus of heavy elements during radioactive decay, but lose energy rapidly in passing through material. A couple sheets of paper are sufficient to stop most alpha particles. Since they cannot penetrate even the outer dead layer of our skin, they are not an external hazard.
Beta particles are electrons emitted from nucleus of atoms at nearly the speed of light. They have a very small mass compared to protons or neutrons and carry a negative charge. Gamma rays are electromagnetic energy waves emitted from the nucleus of atoms and have no charge.
X-rays are the same as gamma rays, except they originate outside the nucleus from processes involving electrons. Other familiar types of electromagnetic wave radiation include: These differ from X-rays and gamma rays only in wave frequency and energy.
Troxler Electronic Laboratories > Safety > Radiation Safety Primer
Gamma rays are much more penetrating than alpha or beta particles. Neutrons are elementary particles which are emitted during certain types of nuclear reactions. Neutrons have no charge and are also highly penetrating. Units of Measure for Radiation The primary quantity of interest in radiation protection is dose equivalent. It so happens that some types of radiation produce greater effects on the body than others for the same amount of energy absorbed absorbed dose.
To account for this, a Quality Factor QF is assigned to each type of radiation to express its relative effectiveness in producing damage. Dose equivalent is the product of the absorbed dose and the QF for that type of radiation.
- RoadReader Model 3430-3440 Moisture-Density Gauges
- RoofReader Model 3216 Gauge
It expresses the risk of harm resulting from exposure to different types of radiation on a common scale.
The basic unit of dose equivalent is the rem. Natural Sources of Radiation Radiation is emitted by radioactive elements naturally present in the soil, water, and air. The major sources include potassium, uranium, and thorium By virtue of their presence in the environment, radionuclides are found all the way up the food chain to humans.
The human body contains a number of radioactive elements, including potassium, radium, and carbon Building materials, like granite, contain radioactive thorium Even the air we breathe contains small concentrations of the radioactive gas, radon, which seeps from the Earth's crust.
Cosmic rays from outer space are another significant natural source of radiation. The atmosphere screens out most of the cosmic rays, but some still penetrate to ground level.
The dose from cosmic rays increases with altitude.
Nuclear Surface Gauges
In addition, the provides a host of technical improvements and innovations, ensuring easier operation, greater reliability, and improved performance. To the testing laboratory that works mostly on soils with only occasional asphalt work, the RoadReader Plus offers a significant opportunity for expanded measurements.
For municipalities or counties verifying overlays, trench fills, and reworks, the is a workhorse that addresses the full range of operational requirements.
And for the DOT or large operator with a full range of needs, the offers tremendous flexibility in a single, easy to use gauge.
The Troxler Thin Layer Density Gauge, Modelfeatures patented technology to measure the density of thin asphalt and concrete layers from 2. This model and the Model are the only nuclear gauges on the market capable of this method of density testing. This gauge is a must-have for paving contractors and others who have the need to monitor asphalt compaction regularly.
Gyratory Compactors Troxler Gyratory Compactors produce gyratory asphalt specimens that predict long-term pavement performance. The program is a system for specifying and testing component materials, designing asphalt mixtures, testing mixes, and predicting pavement performance.
The Troxler Gyratory Compactor is an integral part of the mix design and testing phases of Superpave. The Gyratory Compactor compacts the asphalt mixture with a fixed pressure while gyrating the mold at a fixed angle. The height of the specimen is continually monitored, providing information on the density of the mix throughout the compaction cycle.
This information is recorded and can be saved or printed.