Download presentation
Presentation is loading. Please wait.
1
In Place Nuclear Density Testing to Determine the % Compaction
2
What to Know? Determine that the soil being tested is from the same source and soil type for which the proctor test was performed. Determine that the soil being tested is from the same source and soil type for which the proctor test was performed. For each soil type specific compaction methods are required to achieve the required compaction. For each soil type specific compaction methods are required to achieve the required compaction. Cohesive – Static Sheepsfoot Granular – Vibratory Smooth Drum Most specifications will require that the moisture content be maintained at ±2% of optimum to achieve its maximum density. Most specifications will require that the moisture content be maintained at ±2% of optimum to achieve its maximum density. Verify that the thickness of the material placed does not exceed the compaction ability of the equipment used. Verify that the thickness of the material placed does not exceed the compaction ability of the equipment used.
3
Various compaction methods are available for differing soil types. Various compaction methods are available for differing soil types. Shown: Shown: Sheepsfoot Sheepsfoot Padfoot Padfoot Vibratory Roller Vibratory Roller Grid Roller Grid Roller
4
Radiation Safety The Nuclear Density Gauge has three radioactive sources located within the unit. The Nuclear Density Gauge has three radioactive sources located within the unit. Cesium, Radium and Amercurium. The sources are encapsulated in lead shielding the Radioactive waves. The sources are encapsulated in lead shielding the Radioactive waves.
5
Protecting Yourself from Radiation Exposure Limit the time of gauge use therefore decreasing the amount of exposure. Limit the time of gauge use therefore decreasing the amount of exposure. Carry the gauge at arms length reducing the exposure to the soft internal organs. Carry the gauge at arms length reducing the exposure to the soft internal organs. Wear a radiation badge and send it in regularly to monitor the level of exposure. Wear a radiation badge and send it in regularly to monitor the level of exposure. Never stand directly in front of the gauge when the source is exposed during servicing. Never stand directly in front of the gauge when the source is exposed during servicing.
6
How Does the nuclear density gauge operate in the Field? Calibrate the gauge to the environment Calibrate the gauge to the environment Input the proctor value Input the proctor value Drive pin in ground to create hole Drive pin in ground to create hole Place gauge over hole and extend rod Place gauge over hole and extend rod Run test and confirm results Run test and confirm results
7
Nuclear Densometer Nuclear Densometer How Do We Determine Actual Field Density?
8
Reporting of Findings Adequate testing performed to verify that the project specifications have been met. Accurate recording of locations and elevations tested with the test results. Overall record of the total quantity of fill material placed and conformance to the required specifications.
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.